[JitDiff X64] [hez2010] JIT: Update type when return temp is freshly created

[MihuBot]

Job completed in 15 minutes 29 seconds (remote runner delay: 1 minute 25 seconds).
dotnet/runtime#111948

Diffs

Diffs

Found 199 files with textual diffs.

Summary of Code Size diffs:
(Lower is better)

Total bytes of base: 43640320
Total bytes of diff: 43639846
Total bytes of delta: -474 (-0.00 % of base)
Total relative delta: -0.32
    diff is an improvement.
    relative diff is an improvement.


Top file regressions (bytes):
         370 : System.IO.IsolatedStorage.dasm (1.65 % of base)
         129 : System.ComponentModel.TypeConverter.dasm (0.04 % of base)

Top file improvements (bytes):
        -254 : System.ComponentModel.Annotations.dasm (-0.48 % of base)
        -227 : System.Composition.Convention.dasm (-0.18 % of base)
        -196 : Microsoft.CSharp.dasm (-0.06 % of base)
        -170 : System.Composition.TypedParts.dasm (-0.35 % of base)
         -51 : System.Private.Xml.dasm (-0.00 % of base)
         -21 : System.Private.CoreLib.dasm (-0.00 % of base)
         -18 : System.Formats.Tar.dasm (-0.01 % of base)
         -18 : System.Resources.Extensions.dasm (-0.04 % of base)
         -18 : Microsoft.Extensions.Configuration.FileExtensions.dasm (-0.39 % of base)

11 total files with Code Size differences (9 improved, 2 regressed), 252 unchanged.

Top method regressions (bytes):
          97 (23.43 % of base) : System.ComponentModel.TypeConverter.dasm - System.Drawing.ColorConverter+<>c:<.cctor>b__9_0():System.ComponentModel.TypeConverter+StandardValuesCollection:this (FullOpts)
          52 (14.81 % of base) : System.IO.IsolatedStorage.dasm - System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int,int,System.IO.IsolatedStorage.IsolatedStorageFile):this (FullOpts)
          52 (14.73 % of base) : System.IO.IsolatedStorage.dasm - System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int,int):this (FullOpts)
          52 (14.21 % of base) : System.IO.IsolatedStorage.dasm - System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int,System.IO.IsolatedStorage.IsolatedStorageFile):this (FullOpts)
          52 (14.25 % of base) : System.IO.IsolatedStorage.dasm - System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int):this (FullOpts)
          52 (14.09 % of base) : System.IO.IsolatedStorage.dasm - System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,System.IO.IsolatedStorage.IsolatedStorageFile):this (FullOpts)
          52 (14.02 % of base) : System.IO.IsolatedStorage.dasm - System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int):this (FullOpts)
          49 (30.06 % of base) : System.Private.CoreLib.dasm - System.IO.FileStream:.ctor(Microsoft.Win32.SafeHandles.SafeFileHandle,int):this (FullOpts)
          29 (7.21 % of base) : System.IO.IsolatedStorage.dasm - System.IO.IsolatedStorage.IsolatedStorageFile:OpenFile(System.String,int,int):System.IO.IsolatedStorage.IsolatedStorageFileStream:this (FullOpts)
          29 (7.04 % of base) : System.IO.IsolatedStorage.dasm - System.IO.IsolatedStorage.IsolatedStorageFile:OpenFile(System.String,int):System.IO.IsolatedStorage.IsolatedStorageFileStream:this (FullOpts)
           4 (1.18 % of base) : System.ComponentModel.TypeConverter.dasm - MS.Internal.Xml.Linq.ComponentModel.XTypeDescriptor`1[double]:GetProperties(System.Attribute[]):System.ComponentModel.PropertyDescriptorCollection:this (FullOpts)
           4 (1.18 % of base) : System.ComponentModel.TypeConverter.dasm - MS.Internal.Xml.Linq.ComponentModel.XTypeDescriptor`1[int]:GetProperties(System.Attribute[]):System.ComponentModel.PropertyDescriptorCollection:this (FullOpts)
           4 (1.18 % of base) : System.ComponentModel.TypeConverter.dasm - MS.Internal.Xml.Linq.ComponentModel.XTypeDescriptor`1[long]:GetProperties(System.Attribute[]):System.ComponentModel.PropertyDescriptorCollection:this (FullOpts)
           4 (1.18 % of base) : System.ComponentModel.TypeConverter.dasm - MS.Internal.Xml.Linq.ComponentModel.XTypeDescriptor`1[short]:GetProperties(System.Attribute[]):System.ComponentModel.PropertyDescriptorCollection:this (FullOpts)
           4 (0.47 % of base) : System.ComponentModel.TypeConverter.dasm - MS.Internal.Xml.Linq.ComponentModel.XTypeDescriptor`1[System.__Canon]:GetProperties(System.Attribute[]):System.ComponentModel.PropertyDescriptorCollection:this (FullOpts)
           4 (1.18 % of base) : System.ComponentModel.TypeConverter.dasm - MS.Internal.Xml.Linq.ComponentModel.XTypeDescriptor`1[System.Nullable`1[int]]:GetProperties(System.Attribute[]):System.ComponentModel.PropertyDescriptorCollection:this (FullOpts)
           4 (1.18 % of base) : System.ComponentModel.TypeConverter.dasm - MS.Internal.Xml.Linq.ComponentModel.XTypeDescriptor`1[System.Numerics.Vector`1[float]]:GetProperties(System.Attribute[]):System.ComponentModel.PropertyDescriptorCollection:this (FullOpts)
           4 (1.18 % of base) : System.ComponentModel.TypeConverter.dasm - MS.Internal.Xml.Linq.ComponentModel.XTypeDescriptor`1[ubyte]:GetProperties(System.Attribute[]):System.ComponentModel.PropertyDescriptorCollection:this (FullOpts)

Top method improvements (bytes):
        -254 (-68.65 % of base) : System.ComponentModel.Annotations.dasm - System.ComponentModel.DataAnnotations.CompareAttribute:GetDisplayNameForProperty(System.Reflection.PropertyInfo):System.String:this (FullOpts)
        -227 (-56.05 % of base) : System.Composition.Convention.dasm - System.Composition.Convention.PartConventionBuilder:MemberHasExportMetadata(System.Reflection.MemberInfo):ubyte (FullOpts)
        -196 (-30.02 % of base) : Microsoft.CSharp.dasm - Microsoft.CSharp.RuntimeBinder.Semantics.TypeManager:InternalsVisibleTo(System.Reflection.Assembly,System.Reflection.Assembly):ubyte (FullOpts)
        -170 (-9.00 % of base) : System.Composition.TypedParts.dasm - System.Composition.CompositionContextExtensions:SatisfyImportsInternal(System.Composition.CompositionContext,System.Object,System.Composition.Convention.AttributedModelProvider) (FullOpts)
         -51 (-3.52 % of base) : System.Private.Xml.dasm - System.Xml.Xsl.Xslt.XPathPatternBuilder:BuildPredicates(System.Xml.Xsl.Qil.QilNode,System.Collections.Generic.List`1[System.Xml.Xsl.Qil.QilNode]):System.Xml.Xsl.Qil.QilNode:this (FullOpts)
         -19 (-3.16 % of base) : System.Private.CoreLib.dasm - System.IO.File:WriteAllLinesAsync(System.String,System.Collections.Generic.IEnumerable`1[System.String],System.Text.Encoding,ubyte,System.Threading.CancellationToken):System.Threading.Tasks.Task (FullOpts)
         -18 (-6.57 % of base) : Microsoft.Extensions.Configuration.FileExtensions.dasm - Microsoft.Extensions.Configuration.FileConfigurationProvider:<Load>g__OpenRead|6_0(Microsoft.Extensions.FileProviders.IFileInfo):System.IO.Stream (FullOpts)
         -18 (-0.60 % of base) : System.Formats.Tar.dasm - System.Formats.Tar.TarWriter:ConstructEntryForWriting(System.String,System.String,int):System.Formats.Tar.TarEntry:this (FullOpts)
         -18 (-5.90 % of base) : System.Private.CoreLib.dasm - System.IO.File:AsyncStreamReader(System.String,System.Text.Encoding):System.IO.StreamReader (FullOpts)
         -18 (-4.04 % of base) : System.Resources.Extensions.dasm - System.Resources.Extensions.DeserializingResourceReader:.ctor(System.String):this (FullOpts)
         -18 (-4.04 % of base) : System.Private.CoreLib.dasm - System.Resources.ResourceReader:.ctor(System.String):this (FullOpts)
         -15 (-2.92 % of base) : System.Private.CoreLib.dasm - System.IO.File:ReadLinesAsync(System.String,System.Threading.CancellationToken):System.Collections.Generic.IAsyncEnumerable`1[System.String] (FullOpts)

Top method regressions (percentages):
          49 (30.06 % of base) : System.Private.CoreLib.dasm - System.IO.FileStream:.ctor(Microsoft.Win32.SafeHandles.SafeFileHandle,int):this (FullOpts)
          97 (23.43 % of base) : System.ComponentModel.TypeConverter.dasm - System.Drawing.ColorConverter+<>c:<.cctor>b__9_0():System.ComponentModel.TypeConverter+StandardValuesCollection:this (FullOpts)
          52 (14.81 % of base) : System.IO.IsolatedStorage.dasm - System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int,int,System.IO.IsolatedStorage.IsolatedStorageFile):this (FullOpts)
          52 (14.73 % of base) : System.IO.IsolatedStorage.dasm - System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int,int):this (FullOpts)
          52 (14.25 % of base) : System.IO.IsolatedStorage.dasm - System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int):this (FullOpts)
          52 (14.21 % of base) : System.IO.IsolatedStorage.dasm - System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int,System.IO.IsolatedStorage.IsolatedStorageFile):this (FullOpts)
          52 (14.09 % of base) : System.IO.IsolatedStorage.dasm - System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,System.IO.IsolatedStorage.IsolatedStorageFile):this (FullOpts)
          52 (14.02 % of base) : System.IO.IsolatedStorage.dasm - System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int):this (FullOpts)
          29 (7.21 % of base) : System.IO.IsolatedStorage.dasm - System.IO.IsolatedStorage.IsolatedStorageFile:OpenFile(System.String,int,int):System.IO.IsolatedStorage.IsolatedStorageFileStream:this (FullOpts)
          29 (7.04 % of base) : System.IO.IsolatedStorage.dasm - System.IO.IsolatedStorage.IsolatedStorageFile:OpenFile(System.String,int):System.IO.IsolatedStorage.IsolatedStorageFileStream:this (FullOpts)
           4 (1.18 % of base) : System.ComponentModel.TypeConverter.dasm - MS.Internal.Xml.Linq.ComponentModel.XTypeDescriptor`1[double]:GetProperties(System.Attribute[]):System.ComponentModel.PropertyDescriptorCollection:this (FullOpts)
           4 (1.18 % of base) : System.ComponentModel.TypeConverter.dasm - MS.Internal.Xml.Linq.ComponentModel.XTypeDescriptor`1[int]:GetProperties(System.Attribute[]):System.ComponentModel.PropertyDescriptorCollection:this (FullOpts)
           4 (1.18 % of base) : System.ComponentModel.TypeConverter.dasm - MS.Internal.Xml.Linq.ComponentModel.XTypeDescriptor`1[long]:GetProperties(System.Attribute[]):System.ComponentModel.PropertyDescriptorCollection:this (FullOpts)
           4 (1.18 % of base) : System.ComponentModel.TypeConverter.dasm - MS.Internal.Xml.Linq.ComponentModel.XTypeDescriptor`1[short]:GetProperties(System.Attribute[]):System.ComponentModel.PropertyDescriptorCollection:this (FullOpts)
           4 (1.18 % of base) : System.ComponentModel.TypeConverter.dasm - MS.Internal.Xml.Linq.ComponentModel.XTypeDescriptor`1[System.Nullable`1[int]]:GetProperties(System.Attribute[]):System.ComponentModel.PropertyDescriptorCollection:this (FullOpts)
           4 (1.18 % of base) : System.ComponentModel.TypeConverter.dasm - MS.Internal.Xml.Linq.ComponentModel.XTypeDescriptor`1[System.Numerics.Vector`1[float]]:GetProperties(System.Attribute[]):System.ComponentModel.PropertyDescriptorCollection:this (FullOpts)
           4 (1.18 % of base) : System.ComponentModel.TypeConverter.dasm - MS.Internal.Xml.Linq.ComponentModel.XTypeDescriptor`1[ubyte]:GetProperties(System.Attribute[]):System.ComponentModel.PropertyDescriptorCollection:this (FullOpts)
           4 (0.47 % of base) : System.ComponentModel.TypeConverter.dasm - MS.Internal.Xml.Linq.ComponentModel.XTypeDescriptor`1[System.__Canon]:GetProperties(System.Attribute[]):System.ComponentModel.PropertyDescriptorCollection:this (FullOpts)

Top method improvements (percentages):
        -254 (-68.65 % of base) : System.ComponentModel.Annotations.dasm - System.ComponentModel.DataAnnotations.CompareAttribute:GetDisplayNameForProperty(System.Reflection.PropertyInfo):System.String:this (FullOpts)
        -227 (-56.05 % of base) : System.Composition.Convention.dasm - System.Composition.Convention.PartConventionBuilder:MemberHasExportMetadata(System.Reflection.MemberInfo):ubyte (FullOpts)
        -196 (-30.02 % of base) : Microsoft.CSharp.dasm - Microsoft.CSharp.RuntimeBinder.Semantics.TypeManager:InternalsVisibleTo(System.Reflection.Assembly,System.Reflection.Assembly):ubyte (FullOpts)
        -170 (-9.00 % of base) : System.Composition.TypedParts.dasm - System.Composition.CompositionContextExtensions:SatisfyImportsInternal(System.Composition.CompositionContext,System.Object,System.Composition.Convention.AttributedModelProvider) (FullOpts)
         -18 (-6.57 % of base) : Microsoft.Extensions.Configuration.FileExtensions.dasm - Microsoft.Extensions.Configuration.FileConfigurationProvider:<Load>g__OpenRead|6_0(Microsoft.Extensions.FileProviders.IFileInfo):System.IO.Stream (FullOpts)
         -18 (-5.90 % of base) : System.Private.CoreLib.dasm - System.IO.File:AsyncStreamReader(System.String,System.Text.Encoding):System.IO.StreamReader (FullOpts)
         -18 (-4.04 % of base) : System.Resources.Extensions.dasm - System.Resources.Extensions.DeserializingResourceReader:.ctor(System.String):this (FullOpts)
         -18 (-4.04 % of base) : System.Private.CoreLib.dasm - System.Resources.ResourceReader:.ctor(System.String):this (FullOpts)
         -51 (-3.52 % of base) : System.Private.Xml.dasm - System.Xml.Xsl.Xslt.XPathPatternBuilder:BuildPredicates(System.Xml.Xsl.Qil.QilNode,System.Collections.Generic.List`1[System.Xml.Xsl.Qil.QilNode]):System.Xml.Xsl.Qil.QilNode:this (FullOpts)
         -19 (-3.16 % of base) : System.Private.CoreLib.dasm - System.IO.File:WriteAllLinesAsync(System.String,System.Collections.Generic.IEnumerable`1[System.String],System.Text.Encoding,ubyte,System.Threading.CancellationToken):System.Threading.Tasks.Task (FullOpts)
         -15 (-2.92 % of base) : System.Private.CoreLib.dasm - System.IO.File:ReadLinesAsync(System.String,System.Threading.CancellationToken):System.Collections.Generic.IAsyncEnumerable`1[System.String] (FullOpts)
         -18 (-0.60 % of base) : System.Formats.Tar.dasm - System.Formats.Tar.TarWriter:ConstructEntryForWriting(System.String,System.String,int):System.Formats.Tar.TarEntry:this (FullOpts)

30 total methods with Code Size differences (12 improved, 18 regressed), 247281 unchanged.

--------------------------------------------------------------------------------

Artifacts:

• build-clr-checked-main.zip (86 MB)
• build-artifacts-main.zip (709 MB)
• build-clr-checked-pr.zip (86 MB)
• build-artifacts-pr.zip (710 MB)
• jit-diffs-main.zip (147 MB)
• jit-diffs-pr.zip (147 MB)
• diff-frameworks.txt (13 KB)
• ShortDiffsRegressions.md (57 KB)
• LongDiffsRegressions.md (185 KB)
• ShortDiffsImprovements.md (59 KB)
• LongDiffsImprovements.md (257 KB)

[MihuBot]

Top method regressions

97 (23.43 % of base) - System.Drawing.ColorConverter+<>c:<.cctor>b__9_0():System.ComponentModel.TypeConverter+StandardValuesCollection:this

 ; Assembly listing for method System.Drawing.ColorConverter+<>c:<.cctor>b__9_0():System.ComponentModel.TypeConverter+StandardValuesCollection:this (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX512 - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; partially interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 10 single block inlinees; 6 inlinees without PGO data
+; 0 inlinees with PGO data; 12 single block inlinees; 7 inlinees without PGO data
 ; Final local variable assignments
 ;
 ;* V00 this         [V00    ] (  0,  0   )     ref  ->  zero-ref    this class-hnd single-def <System.Drawing.ColorConverter+<>c>
 ;# V01 OutArgs      [V01    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
-;  V02 tmp1         [V02,T02] (  3,  6   )     ref  ->  rbx         class-hnd exact single-def "NewObj constructor temp" <System.Collections.Generic.HashSet`1[System.Drawing.Color]>
-;  V03 tmp2         [V03,T07] (  2,  4   )     ref  ->  r15         class-hnd single-def "dup spill" <System.Func`2[System.Drawing.Color,System.Drawing.Color]>
+;  V02 tmp1         [V02,T04] (  3,  6   )     ref  ->  rbx         class-hnd exact single-def "NewObj constructor temp" <System.Collections.Generic.HashSet`1[System.Drawing.Color]>
+;  V03 tmp2         [V03,T08] (  2,  4   )     ref  ->  r15         class-hnd single-def "dup spill" <System.Func`2[System.Drawing.Color,System.Drawing.Color]>
 ;* V04 tmp3         [V04    ] (  0,  0   )     ref  ->  zero-ref    single-def
-;  V05 tmp4         [V05,T05] (  5,  4.50)     ref  ->  r15        
-;  V06 tmp5         [V06,T08] (  2,  4   )     ref  ->  r14         class-hnd exact single-def "NewObj constructor temp" <System.Drawing.ColorConverter+ColorComparer>
-;  V07 tmp6         [V07,T03] (  3,  6   )     ref  ->  r15         class-hnd exact single-def "NewObj constructor temp" <System.ComponentModel.TypeConverter+StandardValuesCollection>
-;  V08 tmp7         [V08,T04] (  5,  5   )     ref  ->  r15         class-hnd exact single-def "NewObj constructor temp" <System.Func`2[System.Drawing.Color,System.Drawing.Color]>
-;  V09 tmp8         [V09,T11] (  5,  3   )     ref  ->  rbx         class-hnd "Inline return value spill temp" <System.Collections.Generic.Dictionary`2[System.String,System.Drawing.Color]>
-;  V10 tmp9         [V10,T01] (  4,  6   )     ref  ->  rdi         class-hnd exact single-def "Inlining Arg" <System.Lazy`1[System.Collections.Generic.Dictionary`2[System.String,System.Drawing.Color]]>
+;  V05 tmp4         [V05,T06] (  5,  4.50)     ref  ->  r15        
+;  V06 tmp5         [V06,T09] (  2,  4   )     ref  ->  r14         class-hnd exact single-def "NewObj constructor temp" <System.Drawing.ColorConverter+ColorComparer>
+;  V07 tmp6         [V07,T02] (  4,  7   )     ref  ->  r15         class-hnd exact single-def "NewObj constructor temp" <System.ComponentModel.TypeConverter+StandardValuesCollection>
+;  V08 tmp7         [V08,T05] (  5,  5   )     ref  ->  r15         class-hnd exact single-def "NewObj constructor temp" <System.Func`2[System.Drawing.Color,System.Drawing.Color]>
+;  V09 tmp8         [V09,T12] (  5,  3   )     ref  ->  rbx         class-hnd "Inline return value spill temp" <System.Collections.Generic.Dictionary`2[System.String,System.Drawing.Color]>
+;  V10 tmp9         [V10,T03] (  4,  6   )     ref  ->  rdi         class-hnd exact single-def "Inlining Arg" <System.Lazy`1[System.Collections.Generic.Dictionary`2[System.String,System.Drawing.Color]]>
 ;* V11 tmp10        [V11    ] (  0,  0   )     ref  ->  zero-ref    class-hnd single-def "Inline return value spill temp" <System.Collections.Generic.Dictionary`2+ValueCollection[System.String,System.Drawing.Color]>
-;  V12 tmp11        [V12,T09] (  2,  4   )     ref  ->  r15         class-hnd exact single-def "dup spill" <System.Collections.Generic.Dictionary`2+ValueCollection[System.__Canon,System.Drawing.Color]>
-;  V13 tmp12        [V13,T10] (  4,  3.50)     ref  ->  r15        
-;  V14 tmp13        [V14,T06] (  4,  4   )     ref  ->  r15         class-hnd exact single-def "NewObj constructor temp" <System.Collections.Generic.Dictionary`2+ValueCollection[System.String,System.Drawing.Color]>
+;  V12 tmp11        [V12,T10] (  2,  4   )     ref  ->  r15         class-hnd exact single-def "dup spill" <System.Collections.Generic.Dictionary`2+ValueCollection[System.__Canon,System.Drawing.Color]>
+;  V13 tmp12        [V13,T11] (  4,  3.50)     ref  ->  r15        
+;  V14 tmp13        [V14,T07] (  4,  4   )     ref  ->  r15         class-hnd exact single-def "NewObj constructor temp" <System.Collections.Generic.Dictionary`2+ValueCollection[System.String,System.Drawing.Color]>
 ;* V15 tmp14        [V15    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def "Inline stloc first use temp" <System.Collections.Generic.Dictionary`2+ValueCollection[System.String,System.Drawing.Color]>
-;  V16 tmp15        [V16,T12] (  2,  2   )     ref  ->  rsi         class-hnd exact single-def "Inlining Arg" <System.Drawing.ColorConverter+<>c>
+;  V16 tmp15        [V16,T14] (  2,  2   )     ref  ->  rsi         class-hnd exact single-def "Inlining Arg" <System.Drawing.ColorConverter+<>c>
 ;  V17 tmp16        [V17,T00] (  8, 16   )     ref  ->  r13         class-hnd exact single-def "NewObj constructor temp" <System.Linq.Enumerable+OrderedIterator`2[System.Drawing.Color,System.Drawing.Color]>
 ;* V18 tmp17        [V18    ] (  0,  0   )     ref  ->  zero-ref    single-def
-;  V19 tmp18        [V19,T13] (  2,  2   )     ref  ->  rsi        
-;  V20 tmp19        [V20,T14] (  2,  2   )     ref  ->  rbx         class-hnd "Inline return value spill temp" <System.Collections.Generic.List`1[System.Drawing.Color]>
+;  V19 tmp18        [V19,T15] (  2,  2   )     ref  ->  rsi        
+;  V20 tmp19        [V20,T16] (  2,  2   )     ref  ->  rbx         class-hnd exact "Inline return value spill temp" <System.Collections.Generic.List`1[System.Drawing.Color]>
 ;* V21 tmp20        [V21    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def "Inline stloc first use temp" <System.Linq.Enumerable+OrderedIterator`2[System.Drawing.Color,System.Drawing.Color]>
 ;* V22 tmp21        [V22    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def "NewObj constructor temp" <System.Collections.Generic.List`1[System.Drawing.Color]>
+;  V23 tmp22        [V23,T01] (  5,  9   )     ref  ->  rbx         class-hnd "Inlining Arg" <System.Collections.ICollection>
+;  V24 tmp23        [V24,T13] (  3,  2.50)     ref  ->  rax         class-hnd single-def "Inline stloc first use temp" <System.Array>
 ;
 ; Lcl frame size = 0
 
 G_M28391_IG01:
        push     rbp
        push     r15
        push     r14
        push     r13
        push     rbx
        lea      rbp, [rsp+0x20]
 						;; size=13 bbWeight=1 PerfScore 5.50
 G_M28391_IG02:
        mov      rdi, 0xD1FFAB1E      ; const ptr
        mov      rdi, gword ptr [rdi]
        cmp      gword ptr [rdi+0x08], 0
        jne      SHORT G_M28391_IG04
 						;; size=20 bbWeight=1 PerfScore 6.25
 G_M28391_IG03:
        mov      rbx, gword ptr [rdi+0x18]
        jmp      SHORT G_M28391_IG05
 						;; size=6 bbWeight=0.50 PerfScore 2.00
 G_M28391_IG04:
        mov      rax, 0xD1FFAB1E      ; code for System.Lazy`1[System.__Canon]:CreateValue():System.__Canon:this
        call     [rax]System.Lazy`1[System.__Canon]:CreateValue():System.__Canon:this
        mov      rbx, rax
 						;; size=15 bbWeight=0.50 PerfScore 1.75
 G_M28391_IG05:
        mov      r15, gword ptr [rbx+0x28]
        test     r15, r15
        jne      SHORT G_M28391_IG07
 						;; size=9 bbWeight=1 PerfScore 3.25
 G_M28391_IG06:
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Generic.Dictionary`2+ValueCollection[System.String,System.Drawing.Color]
        call     CORINFO_HELP_NEWSFAST
        mov      r15, rax
        lea      rdi, bword ptr [r15+0x08]
        mov      rsi, rbx
        call     CORINFO_HELP_ASSIGN_REF
        lea      rdi, bword ptr [rbx+0x28]
        mov      rsi, r15
        call     CORINFO_HELP_ASSIGN_REF
 						;; size=42 bbWeight=0.50 PerfScore 2.50
 G_M28391_IG07:
        mov      rdi, 0xD1FFAB1E      ; System.Collections.Generic.HashSet`1[System.Drawing.Color]
        call     CORINFO_HELP_NEWSFAST
        mov      rbx, rax
        mov      rdi, rbx
        mov      rsi, r15
        xor      rdx, rdx
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Generic.HashSet`1[System.Drawing.Color]:.ctor(System.Collections.Generic.IEnumerable`1[System.Drawing.Color],System.Collections.Generic.IEqualityComparer`1[System.Drawing.Color]):this
        call     [rax]System.Collections.Generic.HashSet`1[System.Drawing.Color]:.ctor(System.Collections.Generic.IEnumerable`1[System.Drawing.Color],System.Collections.Generic.IEqualityComparer`1[System.Drawing.Color]):this
        mov      rdi, 0xD1FFAB1E      ; data for System.Drawing.ColorConverter+<>c:<>9__9_1
        mov      r15, gword ptr [rdi]
        test     r15, r15
        jne      SHORT G_M28391_IG09
 						;; size=56 bbWeight=1 PerfScore 9.00
 G_M28391_IG08:
        mov      rdi, 0xD1FFAB1E      ; System.Func`2[System.Drawing.Color,System.Drawing.Color]
        call     CORINFO_HELP_NEWSFAST
        mov      r15, rax
        mov      rdi, 0xD1FFAB1E      ; const ptr
        mov      rsi, gword ptr [rdi]
        lea      rdi, bword ptr [r15+0x08]
        call     CORINFO_HELP_ASSIGN_REF
        mov      rdi, 0xD1FFAB1E      ; code for System.Drawing.ColorConverter+<>c:<.cctor>b__9_1(System.Drawing.Color):System.Drawing.Color:this
        mov      qword ptr [r15+0x18], rdi
        mov      rdi, 0xD1FFAB1E      ; data for System.Drawing.ColorConverter+<>c:<>9__9_1
        mov      rsi, r15
        call     CORINFO_HELP_ASSIGN_REF
 						;; size=72 bbWeight=0.50 PerfScore 4.00
 G_M28391_IG09:
        mov      rdi, 0xD1FFAB1E      ; System.Drawing.ColorConverter+ColorComparer
        call     CORINFO_HELP_NEWSFAST
        mov      r14, rax
        mov      rdi, 0xD1FFAB1E      ; System.Linq.Enumerable+OrderedIterator`2[System.Drawing.Color,System.Drawing.Color]
        call     CORINFO_HELP_NEWSFAST
        mov      r13, rax
        call     System.Environment:get_CurrentManagedThreadId():int
        mov      dword ptr [r13+0x08], eax
        lea      rdi, bword ptr [r13+0x28]
        mov      rsi, rbx
        call     CORINFO_HELP_ASSIGN_REF
        test     r15, r15
-       je       SHORT G_M28391_IG11
+       je       G_M28391_IG16
        xor      rdi, rdi
        mov      gword ptr [r13+0x30], rdi
        lea      rdi, bword ptr [r13+0x38]
        mov      rsi, r15
        call     CORINFO_HELP_ASSIGN_REF
        mov      rsi, r14
        lea      rdi, bword ptr [r13+0x40]
        call     CORINFO_HELP_ASSIGN_REF
        mov      byte  ptr [r13+0x58], 0
        mov      rdi, r13
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.Enumerable+OrderedIterator`1[System.Drawing.Color]:ToList():System.Collections.Generic.List`1[System.Drawing.Color]:this
        call     [rax]System.Linq.Enumerable+OrderedIterator`1[System.Drawing.Color]:ToList():System.Collections.Generic.List`1[System.Drawing.Color]:this
        mov      rbx, rax
        mov      rdi, 0xD1FFAB1E      ; System.ComponentModel.TypeConverter+StandardValuesCollection
        call     CORINFO_HELP_NEWSFAST
        mov      r15, rax
-       mov      rdi, r15
-       mov      rsi, rbx
-       mov      rax, 0xD1FFAB1E      ; code for System.ComponentModel.TypeConverter+StandardValuesCollection:.ctor(System.Collections.ICollection):this
-       call     [rax]System.ComponentModel.TypeConverter+StandardValuesCollection:.ctor(System.Collections.ICollection):this
-       mov      rax, r15
-						;; size=154 bbWeight=1 PerfScore 23.00
+       test     rbx, rbx
+       jne      SHORT G_M28391_IG12
+						;; size=142 bbWeight=1 PerfScore 20.25
 G_M28391_IG10:
+       mov      rdi, 0xD1FFAB1E      ; global ptr
+       test     byte  ptr [rdi], 1
+       je       SHORT G_M28391_IG17
+						;; size=15 bbWeight=0.50 PerfScore 2.12
+G_M28391_IG11:
+       mov      rsi, 0xD1FFAB1E      ; data for System.Array+EmptyArray`1[System.Object]:Value
+       mov      rbx, gword ptr [rsi]
+						;; size=13 bbWeight=0.50 PerfScore 1.12
+G_M28391_IG12:
+       mov      rsi, rbx
+       mov      rdi, 0xD1FFAB1E      ; System.Array
+       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_ISINSTANCEOFCLASS
+       call     [rax]CORINFO_HELP_ISINSTANCEOFCLASS
+       test     rax, rax
+       je       SHORT G_M28391_IG14
+						;; size=30 bbWeight=1 PerfScore 5.00
+G_M28391_IG13:
+       lea      rdi, bword ptr [r15+0x10]
+       mov      rsi, rax
+       call     CORINFO_HELP_ASSIGN_REF
+						;; size=12 bbWeight=0.50 PerfScore 0.88
+G_M28391_IG14:
+       lea      rdi, bword ptr [r15+0x08]
+       mov      rsi, rbx
+       call     CORINFO_HELP_ASSIGN_REF
+       mov      rax, r15
+						;; size=15 bbWeight=1 PerfScore 2.00
+G_M28391_IG15:
        pop      rbx
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        ret      
 						;; size=9 bbWeight=1 PerfScore 3.50
-G_M28391_IG11:
+G_M28391_IG16:
        mov      edi, 9
        mov      rax, 0xD1FFAB1E      ; code for System.Linq.ThrowHelper:ThrowArgumentNullException(int)
        call     [rax]System.Linq.ThrowHelper:ThrowArgumentNullException(int)
        int3     
 						;; size=18 bbWeight=0.50 PerfScore 1.88
+G_M28391_IG17:
+       mov      rdi, 0xD1FFAB1E      ; System.Array+EmptyArray`1[System.Object]
+       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_GET_GCSTATIC_BASE
+       call     [rax]CORINFO_HELP_GET_GCSTATIC_BASE
+       jmp      SHORT G_M28391_IG11
+						;; size=24 bbWeight=0 PerfScore 0.00
 
-; Total bytes of code 414, prolog size 13, PerfScore 62.62, instruction count 95, allocated bytes for code 414 (MethodHash=52239118) for method System.Drawing.ColorConverter+<>c:<.cctor>b__9_0():System.ComponentModel.TypeConverter+StandardValuesCollection:this (FullOpts)
+; Total bytes of code 511, prolog size 13, PerfScore 71.00, instruction count 114, allocated bytes for code 511 (MethodHash=52239118) for method System.Drawing.ColorConverter+<>c:<.cctor>b__9_0():System.ComponentModel.TypeConverter+StandardValuesCollection:this (FullOpts)
 ; ============================================================

52 (14.81 % of base) - System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int,int,System.IO.IsolatedStorage.IsolatedStorageFile):this

 ; Assembly listing for method System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int,int,System.IO.IsolatedStorage.IsolatedStorageFile):this (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX512 - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; partially interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 22 single block inlinees; 3 inlinees without PGO data
+; 0 inlinees with PGO data; 28 single block inlinees; 4 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 this         [V00,T01] (  8,  8   )     ref  ->  rbx         this class-hnd single-def <System.IO.IsolatedStorage.IsolatedStorageFileStream>
+;  V00 this         [V00,T01] (  9,  8.50)     ref  ->  rbx         this class-hnd single-def <System.IO.IsolatedStorage.IsolatedStorageFileStream>
 ;  V01 arg1         [V01,T05] (  4,  4   )     ref  ->  r14         class-hnd single-def <System.String>
-;  V02 arg2         [V02,T08] (  3,  3   )     int  ->  rdx         single-def
+;  V02 arg2         [V02,T09] (  3,  3   )     int  ->  rdx         single-def
 ;  V03 arg3         [V03,T04] (  5,  5   )     int  ->  r15         single-def
-;  V04 arg4         [V04,T09] (  3,  3   )     int  ->   r8         single-def
-;  V05 arg5         [V05,T07] (  3,  3   )     ref  ->   r9         class-hnd single-def <System.IO.IsolatedStorage.IsolatedStorageFile>
+;  V04 arg4         [V04,T10] (  3,  3   )     int  ->   r8         single-def
+;  V05 arg5         [V05,T08] (  3,  3   )     ref  ->   r9         class-hnd single-def <System.IO.IsolatedStorage.IsolatedStorageFile>
 ;  V06 OutArgs      [V06    ] (  1,  1   )  struct ( 8) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;  V07 tmp1         [V07,T03] (  4,  8   )  struct (24) [rbp-0x40]  do-not-enreg[HS] must-init hidden-struct-arg "spilled call-like call argument" <System.IO.IsolatedStorage.IsolatedStorageFileStream+InitializationData>
 ;  V08 tmp2         [V08,T00] (  9, 18   )     ref  ->  [rbp-0x48]  class-hnd exact spill-single-def "NewObj constructor temp" <Microsoft.Win32.SafeHandles.SafeFileHandle>
-;  V09 tmp3         [V09,T11] (  2,  4   )    long  ->  r12         "finalizable newobj spill"
+;  V09 tmp3         [V09,T12] (  2,  4   )    long  ->  r12         "finalizable newobj spill"
 ;* V10 tmp4         [V10    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <Microsoft.Win32.SafeHandles.SafeFileHandle>
-;  V11 tmp5         [V11,T12] (  2,  2   )     ref  ->  rax         class-hnd single-def "Inline return value spill temp" <System.IO.Strategies.FileStreamStrategy>
+;* V11 tmp5         [V11    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inline return value spill temp" <System.IO.Strategies.FileStreamStrategy>
 ;* V12 tmp6         [V12    ] (  0,  0   )   ubyte  ->  zero-ref    "Inlining Arg"
-;* V13 tmp7         [V13    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inline stloc first use temp" <System.IO.Strategies.FileStreamStrategy>
+;* V13 tmp7         [V13    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def "Inline stloc first use temp" <System.IO.Strategies.BufferedFileStreamStrategy>
 ;  V14 tmp8         [V14,T06] (  3,  6   )     ref  ->  r12         class-hnd exact single-def "NewObj constructor temp" <System.IO.Strategies.UnixFileStreamStrategy>
-;* V15 tmp9         [V15    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inline return value spill temp" <System.IO.Strategies.FileStreamStrategy>
-;  V16 tmp10        [V16,T02] (  4,  8   )     ref  ->  r15         class-hnd exact single-def "NewObj constructor temp" <System.IO.Strategies.BufferedFileStreamStrategy>
-;  V17 tmp11        [V17,T10] (  4,  4   )     ref  ->  r13         single-def "V07.[000..008)"
+;* V15 tmp9         [V15    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inline return value spill temp" <System.IO.Strategies.BufferedFileStreamStrategy>
+;  V16 tmp10        [V16,T02] (  5,  8   )     ref  ->  r15         class-hnd exact single-def "NewObj constructor temp" <System.IO.Strategies.BufferedFileStreamStrategy>
+;  V17 tmp11        [V17,T13] (  3,  2   )     ref  ->  rsi         class-hnd "Inline return value spill temp" <System.IO.Strategies.FileStreamStrategy>
+;  V18 tmp12        [V18,T07] (  5,  5   )     ref  ->  r12         class-hnd exact single-def "NewObj constructor temp" <System.IO.Strategies.DerivedFileStreamStrategy>
+;  V19 tmp13        [V19,T11] (  4,  4   )     ref  ->  r13         single-def "V07.[000..008)"
 ;
 ; Lcl frame size = 40
 
 G_M41640_IG01:
        push     rbp
        push     r15
        push     r14
        push     r13
        push     r12
        push     rbx
        sub      rsp, 40
        lea      rbp, [rsp+0x50]
        vxorps   xmm8, xmm8, xmm8
        vmovdqa  xmmword ptr [rbp-0x40], xmm8
        xor      eax, eax
        mov      qword ptr [rbp-0x30], rax
        mov      rbx, rdi
        mov      r14, rsi
        mov      r15d, ecx
 						;; size=44 bbWeight=1 PerfScore 11.08
 G_M41640_IG02:
        mov      gword ptr [rsp], r9
        lea      rdi, [rbp-0x40]
        mov      rsi, r14
        mov      ecx, r15d
        mov      r9d, 0x400
        mov      rax, 0xD1FFAB1E      ; code for System.IO.IsolatedStorage.IsolatedStorageFileStream:InitializeFileStream(System.String,int,int,int,int,System.IO.IsolatedStorage.IsolatedStorageFile):System.IO.IsolatedStorage.IsolatedStorageFileStream+InitializationData
        call     [rax]System.IO.IsolatedStorage.IsolatedStorageFileStream:InitializeFileStream(System.String,int,int,int,int,System.IO.IsolatedStorage.IsolatedStorageFile):System.IO.IsolatedStorage.IsolatedStorageFileStream+InitializationData
        mov      r13, gword ptr [rbp-0x40]
        mov      rdi, r13
        mov      rax, qword ptr [r13]
        mov      rax, qword ptr [rax+0x68]
        call     [rax+0x30]System.IO.FileStream:get_SafeFileHandle():Microsoft.Win32.SafeHandles.SafeFileHandle:this
        mov      r12, qword ptr [rax+0x08]
        mov      rdi, 0xD1FFAB1E      ; Microsoft.Win32.SafeHandles.SafeFileHandle
        call     CORINFO_HELP_NEWFAST
        mov      gword ptr [rbp-0x48], rax
        xor      edi, edi
        mov      qword ptr [rax+0x08], rdi
        mov      dword ptr [rax+0x10], 4
        mov      byte  ptr [rax+0x14], 0
        mov      rdi, rax
        call     System.GC:_SuppressFinalize(System.Object)
        mov      rax, gword ptr [rbp-0x48]
        mov      byte  ptr [rax+0x15], 1
        mov      qword ptr [rax+0x08], r12
        mov      rdi, rax
        mov      esi, r15d
        mov      edx, 0x400
        mov      rcx, 0xD1FFAB1E      ; code for System.IO.FileStream:ValidateHandle(Microsoft.Win32.SafeHandles.SafeFileHandle,int,int)
        call     [rcx]System.IO.FileStream:ValidateHandle(Microsoft.Win32.SafeHandles.SafeFileHandle,int,int)
        mov      rdi, 0xD1FFAB1E      ; System.IO.Strategies.UnixFileStreamStrategy
        call     CORINFO_HELP_NEWSFAST
        mov      r12, rax
        mov      rdi, r12
        mov      rsi, gword ptr [rbp-0x48]
        mov      edx, r15d
        mov      rax, 0xD1FFAB1E      ; code for System.IO.Strategies.OSFileStreamStrategy:.ctor(Microsoft.Win32.SafeHandles.SafeFileHandle,int):this
        call     [rax]System.IO.Strategies.OSFileStreamStrategy:.ctor(Microsoft.Win32.SafeHandles.SafeFileHandle,int):this
        mov      rdi, 0xD1FFAB1E      ; System.IO.Strategies.BufferedFileStreamStrategy
        call     CORINFO_HELP_NEWSFAST
        mov      r15, rax
        lea      rdi, bword ptr [r15+0x18]
        mov      rsi, r12
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [r15+0x28], 0x400
-       mov      rdi, rbx
+       mov      rdi, 0xD1FFAB1E      ; System.IO.FileStream
+       cmp      qword ptr [rbx], rdi
+       jne      SHORT G_M41640_IG04
+						;; size=226 bbWeight=1 PerfScore 44.25
+G_M41640_IG03:
        mov      rsi, r15
-       mov      rax, 0xD1FFAB1E      ; code for System.IO.Strategies.FileStreamHelpers:WrapIfDerivedType(System.IO.FileStream,System.IO.Strategies.FileStreamStrategy):System.IO.Strategies.FileStreamStrategy
-       call     [rax]System.IO.Strategies.FileStreamHelpers:WrapIfDerivedType(System.IO.FileStream,System.IO.Strategies.FileStreamStrategy):System.IO.Strategies.FileStreamStrategy
+       jmp      SHORT G_M41640_IG05
+						;; size=5 bbWeight=0.50 PerfScore 1.12
+G_M41640_IG04:
+       mov      rdi, 0xD1FFAB1E      ; System.IO.Strategies.DerivedFileStreamStrategy
+       call     CORINFO_HELP_NEWSFAST
+       mov      r12, rax
+       lea      rdi, bword ptr [r12+0x20]
+       mov      rsi, rbx
+       call     CORINFO_HELP_ASSIGN_REF
+       lea      rdi, bword ptr [r12+0x18]
+       mov      rsi, r15
+       call     CORINFO_HELP_ASSIGN_REF
+       mov      byte  ptr [r12+0x10], 1
+       mov      rsi, r12
+						;; size=53 bbWeight=0.50 PerfScore 3.12
+G_M41640_IG05:
        lea      rdi, bword ptr [rbx+0x10]
-       mov      rsi, rax
        call     CORINFO_HELP_ASSIGN_REF
        lea      rdi, bword ptr [rbx+0x20]
        mov      rsi, gword ptr [rbp-0x38]
        call     CORINFO_HELP_ASSIGN_REF
-						;; size=254 bbWeight=1 PerfScore 48.00
-G_M41640_IG03:
        lea      rdi, bword ptr [rbx+0x28]
        mov      rsi, r14
        call     CORINFO_HELP_ASSIGN_REF
        lea      rdi, bword ptr [rbx+0x30]
        mov      rsi, gword ptr [rbp-0x30]
        call     CORINFO_HELP_ASSIGN_REF
        lea      rdi, bword ptr [rbx+0x18]
        mov      rsi, r13
        call     CORINFO_HELP_ASSIGN_REF
        nop      
-						;; size=38 bbWeight=1 PerfScore 6.25
-G_M41640_IG04:
+						;; size=60 bbWeight=1 PerfScore 10.25
+G_M41640_IG06:
        add      rsp, 40
        pop      rbx
        pop      r12
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        ret      
 						;; size=15 bbWeight=1 PerfScore 4.25
 
-; Total bytes of code 351, prolog size 35, PerfScore 69.58, instruction count 88, allocated bytes for code 351 (MethodHash=ada95d57) for method System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int,int,System.IO.IsolatedStorage.IsolatedStorageFile):this (FullOpts)
+; Total bytes of code 403, prolog size 35, PerfScore 74.08, instruction count 99, allocated bytes for code 403 (MethodHash=ada95d57) for method System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int,int,System.IO.IsolatedStorage.IsolatedStorageFile):this (FullOpts)
 ; ============================================================

52 (14.73 % of base) - System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int,int):this

 ; Assembly listing for method System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int,int):this (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX512 - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; partially interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 22 single block inlinees; 3 inlinees without PGO data
+; 0 inlinees with PGO data; 28 single block inlinees; 4 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 this         [V00,T01] (  8,  8   )     ref  ->  rbx         this class-hnd single-def <System.IO.IsolatedStorage.IsolatedStorageFileStream>
+;  V00 this         [V00,T01] (  9,  8.50)     ref  ->  rbx         this class-hnd single-def <System.IO.IsolatedStorage.IsolatedStorageFileStream>
 ;  V01 arg1         [V01,T05] (  4,  4   )     ref  ->  r14         class-hnd single-def <System.String>
-;  V02 arg2         [V02,T07] (  3,  3   )     int  ->  rdx         single-def
+;  V02 arg2         [V02,T08] (  3,  3   )     int  ->  rdx         single-def
 ;  V03 arg3         [V03,T04] (  5,  5   )     int  ->  r15         single-def
-;  V04 arg4         [V04,T08] (  3,  3   )     int  ->   r8         single-def
+;  V04 arg4         [V04,T09] (  3,  3   )     int  ->   r8         single-def
 ;  V05 OutArgs      [V05    ] (  1,  1   )  struct ( 8) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;  V06 tmp1         [V06,T03] (  4,  8   )  struct (24) [rbp-0x40]  do-not-enreg[HS] must-init hidden-struct-arg "spilled call-like call argument" <System.IO.IsolatedStorage.IsolatedStorageFileStream+InitializationData>
 ;  V07 tmp2         [V07,T00] (  9, 18   )     ref  ->  [rbp-0x48]  class-hnd exact spill-single-def "NewObj constructor temp" <Microsoft.Win32.SafeHandles.SafeFileHandle>
-;  V08 tmp3         [V08,T10] (  2,  4   )    long  ->  r12         "finalizable newobj spill"
+;  V08 tmp3         [V08,T11] (  2,  4   )    long  ->  r12         "finalizable newobj spill"
 ;* V09 tmp4         [V09    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <Microsoft.Win32.SafeHandles.SafeFileHandle>
-;  V10 tmp5         [V10,T11] (  2,  2   )     ref  ->  rax         class-hnd single-def "Inline return value spill temp" <System.IO.Strategies.FileStreamStrategy>
+;* V10 tmp5         [V10    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inline return value spill temp" <System.IO.Strategies.FileStreamStrategy>
 ;* V11 tmp6         [V11    ] (  0,  0   )   ubyte  ->  zero-ref    "Inlining Arg"
-;* V12 tmp7         [V12    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inline stloc first use temp" <System.IO.Strategies.FileStreamStrategy>
+;* V12 tmp7         [V12    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def "Inline stloc first use temp" <System.IO.Strategies.BufferedFileStreamStrategy>
 ;  V13 tmp8         [V13,T06] (  3,  6   )     ref  ->  r12         class-hnd exact single-def "NewObj constructor temp" <System.IO.Strategies.UnixFileStreamStrategy>
-;* V14 tmp9         [V14    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inline return value spill temp" <System.IO.Strategies.FileStreamStrategy>
-;  V15 tmp10        [V15,T02] (  4,  8   )     ref  ->  r15         class-hnd exact single-def "NewObj constructor temp" <System.IO.Strategies.BufferedFileStreamStrategy>
-;  V16 tmp11        [V16,T09] (  4,  4   )     ref  ->  r13         single-def "V06.[000..008)"
+;* V14 tmp9         [V14    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inline return value spill temp" <System.IO.Strategies.BufferedFileStreamStrategy>
+;  V15 tmp10        [V15,T02] (  5,  8   )     ref  ->  r15         class-hnd exact single-def "NewObj constructor temp" <System.IO.Strategies.BufferedFileStreamStrategy>
+;  V16 tmp11        [V16,T12] (  3,  2   )     ref  ->  rsi         class-hnd "Inline return value spill temp" <System.IO.Strategies.FileStreamStrategy>
+;  V17 tmp12        [V17,T07] (  5,  5   )     ref  ->  r12         class-hnd exact single-def "NewObj constructor temp" <System.IO.Strategies.DerivedFileStreamStrategy>
+;  V18 tmp13        [V18,T10] (  4,  4   )     ref  ->  r13         single-def "V06.[000..008)"
 ;
 ; Lcl frame size = 40
 
 G_M52175_IG01:
        push     rbp
        push     r15
        push     r14
        push     r13
        push     r12
        push     rbx
        sub      rsp, 40
        lea      rbp, [rsp+0x50]
        vxorps   xmm8, xmm8, xmm8
        vmovdqa  xmmword ptr [rbp-0x40], xmm8
        xor      eax, eax
        mov      qword ptr [rbp-0x30], rax
        mov      rbx, rdi
        mov      r14, rsi
        mov      r15d, ecx
 						;; size=44 bbWeight=1 PerfScore 11.08
 G_M52175_IG02:
        xor      rdi, rdi
        mov      gword ptr [rsp], rdi
        lea      rdi, [rbp-0x40]
        mov      rsi, r14
        mov      ecx, r15d
        mov      r9d, 0x400
        mov      rax, 0xD1FFAB1E      ; code for System.IO.IsolatedStorage.IsolatedStorageFileStream:InitializeFileStream(System.String,int,int,int,int,System.IO.IsolatedStorage.IsolatedStorageFile):System.IO.IsolatedStorage.IsolatedStorageFileStream+InitializationData
        call     [rax]System.IO.IsolatedStorage.IsolatedStorageFileStream:InitializeFileStream(System.String,int,int,int,int,System.IO.IsolatedStorage.IsolatedStorageFile):System.IO.IsolatedStorage.IsolatedStorageFileStream+InitializationData
        mov      r13, gword ptr [rbp-0x40]
        mov      rdi, r13
        mov      rax, qword ptr [r13]
        mov      rax, qword ptr [rax+0x68]
        call     [rax+0x30]System.IO.FileStream:get_SafeFileHandle():Microsoft.Win32.SafeHandles.SafeFileHandle:this
        mov      r12, qword ptr [rax+0x08]
        mov      rdi, 0xD1FFAB1E      ; Microsoft.Win32.SafeHandles.SafeFileHandle
        call     CORINFO_HELP_NEWFAST
        mov      gword ptr [rbp-0x48], rax
        xor      edi, edi
        mov      qword ptr [rax+0x08], rdi
        mov      dword ptr [rax+0x10], 4
        mov      byte  ptr [rax+0x14], 0
        mov      rdi, rax
        call     System.GC:_SuppressFinalize(System.Object)
        mov      rax, gword ptr [rbp-0x48]
        mov      byte  ptr [rax+0x15], 1
        mov      qword ptr [rax+0x08], r12
        mov      rdi, rax
        mov      esi, r15d
        mov      edx, 0x400
        mov      rcx, 0xD1FFAB1E      ; code for System.IO.FileStream:ValidateHandle(Microsoft.Win32.SafeHandles.SafeFileHandle,int,int)
        call     [rcx]System.IO.FileStream:ValidateHandle(Microsoft.Win32.SafeHandles.SafeFileHandle,int,int)
        mov      rdi, 0xD1FFAB1E      ; System.IO.Strategies.UnixFileStreamStrategy
        call     CORINFO_HELP_NEWSFAST
        mov      r12, rax
        mov      rdi, r12
        mov      rsi, gword ptr [rbp-0x48]
        mov      edx, r15d
        mov      rax, 0xD1FFAB1E      ; code for System.IO.Strategies.OSFileStreamStrategy:.ctor(Microsoft.Win32.SafeHandles.SafeFileHandle,int):this
        call     [rax]System.IO.Strategies.OSFileStreamStrategy:.ctor(Microsoft.Win32.SafeHandles.SafeFileHandle,int):this
        mov      rdi, 0xD1FFAB1E      ; System.IO.Strategies.BufferedFileStreamStrategy
        call     CORINFO_HELP_NEWSFAST
        mov      r15, rax
        lea      rdi, bword ptr [r15+0x18]
        mov      rsi, r12
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [r15+0x28], 0x400
-       mov      rdi, rbx
+       mov      rdi, 0xD1FFAB1E      ; System.IO.FileStream
+       cmp      qword ptr [rbx], rdi
+       jne      SHORT G_M52175_IG04
+						;; size=228 bbWeight=1 PerfScore 44.50
+G_M52175_IG03:
        mov      rsi, r15
-       mov      rax, 0xD1FFAB1E      ; code for System.IO.Strategies.FileStreamHelpers:WrapIfDerivedType(System.IO.FileStream,System.IO.Strategies.FileStreamStrategy):System.IO.Strategies.FileStreamStrategy
-       call     [rax]System.IO.Strategies.FileStreamHelpers:WrapIfDerivedType(System.IO.FileStream,System.IO.Strategies.FileStreamStrategy):System.IO.Strategies.FileStreamStrategy
+       jmp      SHORT G_M52175_IG05
+						;; size=5 bbWeight=0.50 PerfScore 1.12
+G_M52175_IG04:
+       mov      rdi, 0xD1FFAB1E      ; System.IO.Strategies.DerivedFileStreamStrategy
+       call     CORINFO_HELP_NEWSFAST
+       mov      r12, rax
+       lea      rdi, bword ptr [r12+0x20]
+       mov      rsi, rbx
+       call     CORINFO_HELP_ASSIGN_REF
+       lea      rdi, bword ptr [r12+0x18]
+       mov      rsi, r15
+       call     CORINFO_HELP_ASSIGN_REF
+       mov      byte  ptr [r12+0x10], 1
+       mov      rsi, r12
+						;; size=53 bbWeight=0.50 PerfScore 3.12
+G_M52175_IG05:
        lea      rdi, bword ptr [rbx+0x10]
-       mov      rsi, rax
        call     CORINFO_HELP_ASSIGN_REF
        lea      rdi, bword ptr [rbx+0x20]
        mov      rsi, gword ptr [rbp-0x38]
        call     CORINFO_HELP_ASSIGN_REF
-						;; size=256 bbWeight=1 PerfScore 48.25
-G_M52175_IG03:
        lea      rdi, bword ptr [rbx+0x28]
        mov      rsi, r14
        call     CORINFO_HELP_ASSIGN_REF
        lea      rdi, bword ptr [rbx+0x30]
        mov      rsi, gword ptr [rbp-0x30]
        call     CORINFO_HELP_ASSIGN_REF
        lea      rdi, bword ptr [rbx+0x18]
        mov      rsi, r13
        call     CORINFO_HELP_ASSIGN_REF
        nop      
-						;; size=38 bbWeight=1 PerfScore 6.25
-G_M52175_IG04:
+						;; size=60 bbWeight=1 PerfScore 10.25
+G_M52175_IG06:
        add      rsp, 40
        pop      rbx
        pop      r12
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        ret      
 						;; size=15 bbWeight=1 PerfScore 4.25
 
-; Total bytes of code 353, prolog size 35, PerfScore 69.83, instruction count 89, allocated bytes for code 353 (MethodHash=238b3430) for method System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int,int):this (FullOpts)
+; Total bytes of code 405, prolog size 35, PerfScore 74.33, instruction count 100, allocated bytes for code 405 (MethodHash=238b3430) for method System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int,int):this (FullOpts)
 ; ============================================================

52 (14.21 % of base) - System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int,System.IO.IsolatedStorage.IsolatedStorageFile):this

 ; Assembly listing for method System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int,System.IO.IsolatedStorage.IsolatedStorageFile):this (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX512 - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; partially interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 22 single block inlinees; 3 inlinees without PGO data
+; 0 inlinees with PGO data; 28 single block inlinees; 4 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 this         [V00,T01] (  8,  8   )     ref  ->  rbx         this class-hnd single-def <System.IO.IsolatedStorage.IsolatedStorageFileStream>
+;  V00 this         [V00,T01] (  9,  8.50)     ref  ->  rbx         this class-hnd single-def <System.IO.IsolatedStorage.IsolatedStorageFileStream>
 ;  V01 arg1         [V01,T05] (  4,  4   )     ref  ->  r14         class-hnd single-def <System.String>
-;  V02 arg2         [V02,T08] (  3,  3   )     int  ->  rdx         single-def
+;  V02 arg2         [V02,T09] (  3,  3   )     int  ->  rdx         single-def
 ;  V03 arg3         [V03,T02] (  6,  6   )     int  ->  r15         single-def
-;  V04 arg4         [V04,T07] (  3,  3   )     ref  ->   r8         class-hnd single-def <System.IO.IsolatedStorage.IsolatedStorageFile>
+;  V04 arg4         [V04,T08] (  3,  3   )     ref  ->   r8         class-hnd single-def <System.IO.IsolatedStorage.IsolatedStorageFile>
 ;  V05 OutArgs      [V05    ] (  1,  1   )  struct ( 8) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;* V06 tmp1         [V06    ] (  0,  0   )     ref  ->  zero-ref    single-def
 ;* V07 tmp2         [V07    ] (  0,  0   )     ref  ->  zero-ref    single-def
 ;* V08 tmp3         [V08    ] (  0,  0   )     int  ->  zero-ref   
 ;* V09 tmp4         [V09    ] (  0,  0   )     int  ->  zero-ref   
 ;* V10 tmp5         [V10    ] (  0,  0   )     ref  ->  zero-ref    single-def
 ;* V11 tmp6         [V11    ] (  0,  0   )     ref  ->  zero-ref    single-def
 ;* V12 tmp7         [V12    ] (  0,  0   )     int  ->  zero-ref   
 ;* V13 tmp8         [V13    ] (  0,  0   )     int  ->  zero-ref   
-;  V14 tmp9         [V14,T12] (  2,  2   )     int  ->   r9        
+;  V14 tmp9         [V14,T13] (  2,  2   )     int  ->   r9        
 ;  V15 tmp10        [V15,T04] (  4,  8   )  struct (24) [rbp-0x40]  do-not-enreg[HS] must-init hidden-struct-arg "spilled call-like call argument" <System.IO.IsolatedStorage.IsolatedStorageFileStream+InitializationData>
 ;  V16 tmp11        [V16,T00] (  9, 18   )     ref  ->  [rbp-0x48]  class-hnd exact spill-single-def "NewObj constructor temp" <Microsoft.Win32.SafeHandles.SafeFileHandle>
-;  V17 tmp12        [V17,T10] (  2,  4   )    long  ->  r12         "finalizable newobj spill"
+;  V17 tmp12        [V17,T11] (  2,  4   )    long  ->  r12         "finalizable newobj spill"
 ;* V18 tmp13        [V18    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <Microsoft.Win32.SafeHandles.SafeFileHandle>
-;  V19 tmp14        [V19,T11] (  2,  2   )     ref  ->  rax         class-hnd single-def "Inline return value spill temp" <System.IO.Strategies.FileStreamStrategy>
+;* V19 tmp14        [V19    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inline return value spill temp" <System.IO.Strategies.FileStreamStrategy>
 ;* V20 tmp15        [V20    ] (  0,  0   )   ubyte  ->  zero-ref    "Inlining Arg"
-;* V21 tmp16        [V21    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inline stloc first use temp" <System.IO.Strategies.FileStreamStrategy>
+;* V21 tmp16        [V21    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def "Inline stloc first use temp" <System.IO.Strategies.BufferedFileStreamStrategy>
 ;  V22 tmp17        [V22,T06] (  3,  6   )     ref  ->  r12         class-hnd exact single-def "NewObj constructor temp" <System.IO.Strategies.UnixFileStreamStrategy>
-;* V23 tmp18        [V23    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inline return value spill temp" <System.IO.Strategies.FileStreamStrategy>
-;  V24 tmp19        [V24,T03] (  4,  8   )     ref  ->  r15         class-hnd exact single-def "NewObj constructor temp" <System.IO.Strategies.BufferedFileStreamStrategy>
-;  V25 tmp20        [V25,T09] (  4,  4   )     ref  ->  r13         single-def "V15.[000..008)"
+;* V23 tmp18        [V23    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inline return value spill temp" <System.IO.Strategies.BufferedFileStreamStrategy>
+;  V24 tmp19        [V24,T03] (  5,  8   )     ref  ->  r15         class-hnd exact single-def "NewObj constructor temp" <System.IO.Strategies.BufferedFileStreamStrategy>
+;  V25 tmp20        [V25,T12] (  3,  2   )     ref  ->  rsi         class-hnd "Inline return value spill temp" <System.IO.Strategies.FileStreamStrategy>
+;  V26 tmp21        [V26,T07] (  5,  5   )     ref  ->  r12         class-hnd exact single-def "NewObj constructor temp" <System.IO.Strategies.DerivedFileStreamStrategy>
+;  V27 tmp22        [V27,T10] (  4,  4   )     ref  ->  r13         single-def "V15.[000..008)"
 ;
 ; Lcl frame size = 40
 
 G_M56311_IG01:
        push     rbp
        push     r15
        push     r14
        push     r13
        push     r12
        push     rbx
        sub      rsp, 40
        lea      rbp, [rsp+0x50]
        vxorps   xmm8, xmm8, xmm8
        vmovdqa  xmmword ptr [rbp-0x40], xmm8
        xor      eax, eax
        mov      qword ptr [rbp-0x30], rax
        mov      rbx, rdi
        mov      r14, rsi
        mov      r15d, ecx
 						;; size=44 bbWeight=1 PerfScore 11.08
 G_M56311_IG02:
        cmp      r15d, 1
        sete     r9b
        movzx    r9, r9b
        mov      gword ptr [rsp], r8
        lea      rdi, [rbp-0x40]
        mov      rsi, r14
        mov      ecx, r15d
        mov      r8d, r9d
        mov      r9d, 0x400
        mov      rax, 0xD1FFAB1E      ; code for System.IO.IsolatedStorage.IsolatedStorageFileStream:InitializeFileStream(System.String,int,int,int,int,System.IO.IsolatedStorage.IsolatedStorageFile):System.IO.IsolatedStorage.IsolatedStorageFileStream+InitializationData
        call     [rax]System.IO.IsolatedStorage.IsolatedStorageFileStream:InitializeFileStream(System.String,int,int,int,int,System.IO.IsolatedStorage.IsolatedStorageFile):System.IO.IsolatedStorage.IsolatedStorageFileStream+InitializationData
        mov      r13, gword ptr [rbp-0x40]
        mov      rdi, r13
        mov      rax, qword ptr [r13]
        mov      rax, qword ptr [rax+0x68]
        call     [rax+0x30]System.IO.FileStream:get_SafeFileHandle():Microsoft.Win32.SafeHandles.SafeFileHandle:this
        mov      r12, qword ptr [rax+0x08]
        mov      rdi, 0xD1FFAB1E      ; Microsoft.Win32.SafeHandles.SafeFileHandle
        call     CORINFO_HELP_NEWFAST
        mov      gword ptr [rbp-0x48], rax
        xor      edi, edi
        mov      qword ptr [rax+0x08], rdi
        mov      dword ptr [rax+0x10], 4
        mov      byte  ptr [rax+0x14], 0
        mov      rdi, rax
        call     System.GC:_SuppressFinalize(System.Object)
        mov      rax, gword ptr [rbp-0x48]
        mov      byte  ptr [rax+0x15], 1
        mov      qword ptr [rax+0x08], r12
        mov      rdi, rax
        mov      esi, r15d
        mov      edx, 0x400
        mov      rcx, 0xD1FFAB1E      ; code for System.IO.FileStream:ValidateHandle(Microsoft.Win32.SafeHandles.SafeFileHandle,int,int)
        call     [rcx]System.IO.FileStream:ValidateHandle(Microsoft.Win32.SafeHandles.SafeFileHandle,int,int)
        mov      rdi, 0xD1FFAB1E      ; System.IO.Strategies.UnixFileStreamStrategy
        call     CORINFO_HELP_NEWSFAST
        mov      r12, rax
        mov      rdi, r12
        mov      rsi, gword ptr [rbp-0x48]
        mov      edx, r15d
        mov      rax, 0xD1FFAB1E      ; code for System.IO.Strategies.OSFileStreamStrategy:.ctor(Microsoft.Win32.SafeHandles.SafeFileHandle,int):this
        call     [rax]System.IO.Strategies.OSFileStreamStrategy:.ctor(Microsoft.Win32.SafeHandles.SafeFileHandle,int):this
        mov      rdi, 0xD1FFAB1E      ; System.IO.Strategies.BufferedFileStreamStrategy
        call     CORINFO_HELP_NEWSFAST
        mov      r15, rax
        lea      rdi, bword ptr [r15+0x18]
        mov      rsi, r12
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [r15+0x28], 0x400
-       mov      rdi, rbx
+       mov      rdi, 0xD1FFAB1E      ; System.IO.FileStream
+       cmp      qword ptr [rbx], rdi
+       jne      SHORT G_M56311_IG04
+						;; size=241 bbWeight=1 PerfScore 46.00
+G_M56311_IG03:
        mov      rsi, r15
-       mov      rax, 0xD1FFAB1E      ; code for System.IO.Strategies.FileStreamHelpers:WrapIfDerivedType(System.IO.FileStream,System.IO.Strategies.FileStreamStrategy):System.IO.Strategies.FileStreamStrategy
-       call     [rax]System.IO.Strategies.FileStreamHelpers:WrapIfDerivedType(System.IO.FileStream,System.IO.Strategies.FileStreamStrategy):System.IO.Strategies.FileStreamStrategy
+       jmp      SHORT G_M56311_IG05
+						;; size=5 bbWeight=0.50 PerfScore 1.12
+G_M56311_IG04:
+       mov      rdi, 0xD1FFAB1E      ; System.IO.Strategies.DerivedFileStreamStrategy
+       call     CORINFO_HELP_NEWSFAST
+       mov      r12, rax
+       lea      rdi, bword ptr [r12+0x20]
+       mov      rsi, rbx
+       call     CORINFO_HELP_ASSIGN_REF
+       lea      rdi, bword ptr [r12+0x18]
+       mov      rsi, r15
+       call     CORINFO_HELP_ASSIGN_REF
+       mov      byte  ptr [r12+0x10], 1
+       mov      rsi, r12
+						;; size=53 bbWeight=0.50 PerfScore 3.12
+G_M56311_IG05:
        lea      rdi, bword ptr [rbx+0x10]
-       mov      rsi, rax
        call     CORINFO_HELP_ASSIGN_REF
        lea      rdi, bword ptr [rbx+0x20]
-						;; size=260 bbWeight=1 PerfScore 47.75
-G_M56311_IG03:
        mov      rsi, gword ptr [rbp-0x38]
        call     CORINFO_HELP_ASSIGN_REF
        lea      rdi, bword ptr [rbx+0x28]
        mov      rsi, r14
        call     CORINFO_HELP_ASSIGN_REF
        lea      rdi, bword ptr [rbx+0x30]
        mov      rsi, gword ptr [rbp-0x30]
        call     CORINFO_HELP_ASSIGN_REF
        lea      rdi, bword ptr [rbx+0x18]
        mov      rsi, r13
        call     CORINFO_HELP_ASSIGN_REF
        nop      
-						;; size=47 bbWeight=1 PerfScore 8.25
-G_M56311_IG04:
+						;; size=60 bbWeight=1 PerfScore 10.25
+G_M56311_IG06:
        add      rsp, 40
        pop      rbx
        pop      r12
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        ret      
 						;; size=15 bbWeight=1 PerfScore 4.25
 
-; Total bytes of code 366, prolog size 35, PerfScore 71.33, instruction count 92, allocated bytes for code 366 (MethodHash=87172408) for method System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int,System.IO.IsolatedStorage.IsolatedStorageFile):this (FullOpts)
+; Total bytes of code 418, prolog size 35, PerfScore 75.83, instruction count 103, allocated bytes for code 418 (MethodHash=87172408) for method System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int,System.IO.IsolatedStorage.IsolatedStorageFile):this (FullOpts)
 ; ============================================================

52 (14.25 % of base) - System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int):this

 ; Assembly listing for method System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int):this (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX512 - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; partially interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 22 single block inlinees; 3 inlinees without PGO data
+; 0 inlinees with PGO data; 28 single block inlinees; 4 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 this         [V00,T01] (  8,  8   )     ref  ->  rbx         this class-hnd single-def <System.IO.IsolatedStorage.IsolatedStorageFileStream>
+;  V00 this         [V00,T01] (  9,  8.50)     ref  ->  rbx         this class-hnd single-def <System.IO.IsolatedStorage.IsolatedStorageFileStream>
 ;  V01 arg1         [V01,T05] (  4,  4   )     ref  ->  r14         class-hnd single-def <System.String>
-;  V02 arg2         [V02,T07] (  3,  3   )     int  ->  rdx         single-def
+;  V02 arg2         [V02,T08] (  3,  3   )     int  ->  rdx         single-def
 ;  V03 arg3         [V03,T02] (  6,  6   )     int  ->  r15         single-def
 ;  V04 OutArgs      [V04    ] (  1,  1   )  struct ( 8) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;* V05 tmp1         [V05    ] (  0,  0   )     ref  ->  zero-ref    single-def
 ;* V06 tmp2         [V06    ] (  0,  0   )     ref  ->  zero-ref    single-def
 ;* V07 tmp3         [V07    ] (  0,  0   )     int  ->  zero-ref   
 ;* V08 tmp4         [V08    ] (  0,  0   )     int  ->  zero-ref   
 ;* V09 tmp5         [V09    ] (  0,  0   )     ref  ->  zero-ref    single-def
 ;* V10 tmp6         [V10    ] (  0,  0   )     ref  ->  zero-ref    single-def
 ;* V11 tmp7         [V11    ] (  0,  0   )     int  ->  zero-ref   
 ;* V12 tmp8         [V12    ] (  0,  0   )     int  ->  zero-ref   
-;  V13 tmp9         [V13,T11] (  2,  2   )     int  ->   r8        
+;  V13 tmp9         [V13,T12] (  2,  2   )     int  ->   r8        
 ;  V14 tmp10        [V14,T04] (  4,  8   )  struct (24) [rbp-0x40]  do-not-enreg[HS] must-init hidden-struct-arg "spilled call-like call argument" <System.IO.IsolatedStorage.IsolatedStorageFileStream+InitializationData>
 ;  V15 tmp11        [V15,T00] (  9, 18   )     ref  ->  [rbp-0x48]  class-hnd exact spill-single-def "NewObj constructor temp" <Microsoft.Win32.SafeHandles.SafeFileHandle>
-;  V16 tmp12        [V16,T09] (  2,  4   )    long  ->  r12         "finalizable newobj spill"
+;  V16 tmp12        [V16,T10] (  2,  4   )    long  ->  r12         "finalizable newobj spill"
 ;* V17 tmp13        [V17    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inlining Arg" <Microsoft.Win32.SafeHandles.SafeFileHandle>
-;  V18 tmp14        [V18,T10] (  2,  2   )     ref  ->  rax         class-hnd single-def "Inline return value spill temp" <System.IO.Strategies.FileStreamStrategy>
+;* V18 tmp14        [V18    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inline return value spill temp" <System.IO.Strategies.FileStreamStrategy>
 ;* V19 tmp15        [V19    ] (  0,  0   )   ubyte  ->  zero-ref    "Inlining Arg"
-;* V20 tmp16        [V20    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inline stloc first use temp" <System.IO.Strategies.FileStreamStrategy>
+;* V20 tmp16        [V20    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def "Inline stloc first use temp" <System.IO.Strategies.BufferedFileStreamStrategy>
 ;  V21 tmp17        [V21,T06] (  3,  6   )     ref  ->  r12         class-hnd exact single-def "NewObj constructor temp" <System.IO.Strategies.UnixFileStreamStrategy>
-;* V22 tmp18        [V22    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inline return value spill temp" <System.IO.Strategies.FileStreamStrategy>
-;  V23 tmp19        [V23,T03] (  4,  8   )     ref  ->  r15         class-hnd exact single-def "NewObj constructor temp" <System.IO.Strategies.BufferedFileStreamStrategy>
-;  V24 tmp20        [V24,T08] (  4,  4   )     ref  ->  r13         single-def "V14.[000..008)"
+;* V22 tmp18        [V22    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inline return value spill temp" <System.IO.Strategies.BufferedFileStreamStrategy>
+;  V23 tmp19        [V23,T03] (  5,  8   )     ref  ->  r15         class-hnd exact single-def "NewObj constructor temp" <System.IO.Strategies.BufferedFileStreamStrategy>
+;  V24 tmp20        [V24,T11] (  3,  2   )     ref  ->  rsi         class-hnd "Inline return value spill temp" <System.IO.Strategies.FileStreamStrategy>
+;  V25 tmp21        [V25,T07] (  5,  5   )     ref  ->  r12         class-hnd exact single-def "NewObj constructor temp" <System.IO.Strategies.DerivedFileStreamStrategy>
+;  V26 tmp22        [V26,T09] (  4,  4   )     ref  ->  r13         single-def "V14.[000..008)"
 ;
 ; Lcl frame size = 40
 
 G_M30544_IG01:
        push     rbp
        push     r15
        push     r14
        push     r13
        push     r12
        push     rbx
        sub      rsp, 40
        lea      rbp, [rsp+0x50]
        vxorps   xmm8, xmm8, xmm8
        vmovdqa  xmmword ptr [rbp-0x40], xmm8
        xor      eax, eax
        mov      qword ptr [rbp-0x30], rax
        mov      rbx, rdi
        mov      r14, rsi
        mov      r15d, ecx
 						;; size=44 bbWeight=1 PerfScore 11.08
 G_M30544_IG02:
        cmp      r15d, 1
        sete     r8b
        movzx    r8, r8b
        xor      rdi, rdi
        mov      gword ptr [rsp], rdi
        lea      rdi, [rbp-0x40]
        mov      rsi, r14
        mov      ecx, r15d
        mov      r9d, 0x400
        mov      rax, 0xD1FFAB1E      ; code for System.IO.IsolatedStorage.IsolatedStorageFileStream:InitializeFileStream(System.String,int,int,int,int,System.IO.IsolatedStorage.IsolatedStorageFile):System.IO.IsolatedStorage.IsolatedStorageFileStream+InitializationData
        call     [rax]System.IO.IsolatedStorage.IsolatedStorageFileStream:InitializeFileStream(System.String,int,int,int,int,System.IO.IsolatedStorage.IsolatedStorageFile):System.IO.IsolatedStorage.IsolatedStorageFileStream+InitializationData
        mov      r13, gword ptr [rbp-0x40]
        mov      rdi, r13
        mov      rax, qword ptr [r13]
        mov      rax, qword ptr [rax+0x68]
        call     [rax+0x30]System.IO.FileStream:get_SafeFileHandle():Microsoft.Win32.SafeHandles.SafeFileHandle:this
        mov      r12, qword ptr [rax+0x08]
        mov      rdi, 0xD1FFAB1E      ; Microsoft.Win32.SafeHandles.SafeFileHandle
        call     CORINFO_HELP_NEWFAST
        mov      gword ptr [rbp-0x48], rax
        xor      edi, edi
        mov      qword ptr [rax+0x08], rdi
        mov      dword ptr [rax+0x10], 4
        mov      byte  ptr [rax+0x14], 0
        mov      rdi, rax
        call     System.GC:_SuppressFinalize(System.Object)
        mov      rax, gword ptr [rbp-0x48]
        mov      byte  ptr [rax+0x15], 1
        mov      qword ptr [rax+0x08], r12
        mov      rdi, rax
        mov      esi, r15d
        mov      edx, 0x400
        mov      rcx, 0xD1FFAB1E      ; code for System.IO.FileStream:ValidateHandle(Microsoft.Win32.SafeHandles.SafeFileHandle,int,int)
        call     [rcx]System.IO.FileStream:ValidateHandle(Microsoft.Win32.SafeHandles.SafeFileHandle,int,int)
        mov      rdi, 0xD1FFAB1E      ; System.IO.Strategies.UnixFileStreamStrategy
        call     CORINFO_HELP_NEWSFAST
        mov      r12, rax
        mov      rdi, r12
        mov      rsi, gword ptr [rbp-0x48]
        mov      edx, r15d
        mov      rax, 0xD1FFAB1E      ; code for System.IO.Strategies.OSFileStreamStrategy:.ctor(Microsoft.Win32.SafeHandles.SafeFileHandle,int):this
        call     [rax]System.IO.Strategies.OSFileStreamStrategy:.ctor(Microsoft.Win32.SafeHandles.SafeFileHandle,int):this
        mov      rdi, 0xD1FFAB1E      ; System.IO.Strategies.BufferedFileStreamStrategy
        call     CORINFO_HELP_NEWSFAST
        mov      r15, rax
        lea      rdi, bword ptr [r15+0x18]
        mov      rsi, r12
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [r15+0x28], 0x400
-       mov      rdi, rbx
+       mov      rdi, 0xD1FFAB1E      ; System.IO.FileStream
+       cmp      qword ptr [rbx], rdi
+       jne      SHORT G_M30544_IG04
+						;; size=240 bbWeight=1 PerfScore 46.00
+G_M30544_IG03:
        mov      rsi, r15
-       mov      rax, 0xD1FFAB1E      ; code for System.IO.Strategies.FileStreamHelpers:WrapIfDerivedType(System.IO.FileStream,System.IO.Strategies.FileStreamStrategy):System.IO.Strategies.FileStreamStrategy
-       call     [rax]System.IO.Strategies.FileStreamHelpers:WrapIfDerivedType(System.IO.FileStream,System.IO.Strategies.FileStreamStrategy):System.IO.Strategies.FileStreamStrategy
+       jmp      SHORT G_M30544_IG05
+						;; size=5 bbWeight=0.50 PerfScore 1.12
+G_M30544_IG04:
+       mov      rdi, 0xD1FFAB1E      ; System.IO.Strategies.DerivedFileStreamStrategy
+       call     CORINFO_HELP_NEWSFAST
+       mov      r12, rax
+       lea      rdi, bword ptr [r12+0x20]
+       mov      rsi, rbx
+       call     CORINFO_HELP_ASSIGN_REF
+       lea      rdi, bword ptr [r12+0x18]
+       mov      rsi, r15
+       call     CORINFO_HELP_ASSIGN_REF
+       mov      byte  ptr [r12+0x10], 1
+       mov      rsi, r12
+						;; size=53 bbWeight=0.50 PerfScore 3.12
+G_M30544_IG05:
        lea      rdi, bword ptr [rbx+0x10]
-       mov      rsi, rax
        call     CORINFO_HELP_ASSIGN_REF
        lea      rdi, bword ptr [rbx+0x20]
-						;; size=259 bbWeight=1 PerfScore 47.75
-G_M30544_IG03:
        mov      rsi, gword ptr [rbp-0x38]
        call     CORINFO_HELP_ASSIGN_REF
        lea      rdi, bword ptr [rbx+0x28]
        mov      rsi, r14
        call     CORINFO_HELP_ASSIGN_REF
        lea      rdi, bword ptr [rbx+0x30]
        mov      rsi, gword ptr [rbp-0x30]
        call     CORINFO_HELP_ASSIGN_REF
        lea      rdi, bword ptr [rbx+0x18]
        mov      rsi, r13
        call     CORINFO_HELP_ASSIGN_REF
        nop      
-						;; size=47 bbWeight=1 PerfScore 8.25
-G_M30544_IG04:
+						;; size=60 bbWeight=1 PerfScore 10.25
+G_M30544_IG06:
        add      rsp, 40
        pop      rbx
        pop      r12
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        ret      
 						;; size=15 bbWeight=1 PerfScore 4.25
 
-; Total bytes of code 365, prolog size 35, PerfScore 71.33, instruction count 92, allocated bytes for code 365 (MethodHash=b45688af) for method System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int):this (FullOpts)
+; Total bytes of code 417, prolog size 35, PerfScore 75.83, instruction count 103, allocated bytes for code 417 (MethodHash=b45688af) for method System.IO.IsolatedStorage.IsolatedStorageFileStream:.ctor(System.String,int,int):this (FullOpts)
 ; ============================================================

Larger list of diffs: https://gist.github.com/MihuBot/ba6ce44c6279497552045876a315ca2f

[MihuBot]

Top method improvements

-254 (-68.65 % of base) - System.ComponentModel.DataAnnotations.CompareAttribute:GetDisplayNameForProperty(System.Reflection.PropertyInfo):System.String:this

 ; Assembly listing for method System.ComponentModel.DataAnnotations.CompareAttribute:GetDisplayNameForProperty(System.Reflection.PropertyInfo):System.String:this (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX512 - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; fully interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 6 single block inlinees; 1 inlinees without PGO data
+; 0 inlinees with PGO data; 7 single block inlinees; 3 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 this         [V00,T04] (  3,  3   )     ref  ->  rbx         this class-hnd single-def <System.ComponentModel.DataAnnotations.CompareAttribute>
-;  V01 arg1         [V01,T05] (  3,  3   )     ref  ->  rsi         class-hnd single-def <System.Reflection.PropertyInfo>
-;  V02 loc0         [V02,T01] (  6, 19   )     ref  ->  [rbp-0x28]  class-hnd EH-live single-def <System.Collections.Generic.IEnumerator`1[System.Attribute]>
-;  V03 loc1         [V03,T08] (  2,  2   )     ref  ->  rax         class-hnd exact <System.ComponentModel.DataAnnotations.DisplayAttribute>
-;  V04 loc2         [V04,T09] (  2,  2   )     ref  ->  [rbp-0x30]  do-not-enreg[Z] must-init class-hnd exact EH-live <System.String>
+;  V00 this         [V00,T06] (  3,  3   )     ref  ->  rbx         this class-hnd single-def <System.ComponentModel.DataAnnotations.CompareAttribute>
+;  V01 arg1         [V01,T07] (  3,  3   )     ref  ->  rsi         class-hnd single-def <System.Reflection.PropertyInfo>
+;* V02 loc0         [V02    ] (  0,  0   )   byref  ->  zero-ref    class-hnd exact <System.SZGenericArrayEnumerator`1[System.Attribute]>
+;  V03 loc1         [V03,T08] (  2,  2   )     ref  ->  rdx         class-hnd exact <System.ComponentModel.DataAnnotations.DisplayAttribute>
+;  V04 loc2         [V04,T09] (  2,  2   )     ref  ->  [rbp-0x10]  do-not-enreg[Z] class-hnd exact EH-live <System.String>
 ;# V05 OutArgs      [V05    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
-;  V06 tmp1         [V06,T00] (  4, 98   )     ref  ->  rax         "ISINST eval op1"
+;  V06 tmp1         [V06,T00] (  4,386   )     ref  ->  rdx         "ISINST eval op1"
 ;* V07 tmp2         [V07    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "spilling qmarkNull" <System.ComponentModel.DataAnnotations.DisplayAttribute>
-;  V08 tmp3         [V08,T03] (  3,  6   )     ref  ->  r15         single-def "Spilling to split statement for tree"
-;  V09 tmp4         [V09,T06] (  3,  3   )     ref  ->  r13         class-hnd "Inline return value spill temp" <System.Collections.Generic.IEnumerator`1[System.Attribute]>
+;  V08 tmp3         [V08,T05] (  3,  6   )     ref  ->  rax         single-def "Spilling to split statement for tree"
+;* V09 tmp4         [V09    ] (  0,  0   )   byref  ->  zero-ref    class-hnd exact "Inline return value spill temp" <System.SZGenericArrayEnumerator`1[System.Attribute]>
 ;* V10 tmp5         [V10    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "updating class info" <System.Attribute[]>
 ;* V11 tmp6         [V11    ] (  0,  0   )     ref  ->  zero-ref    class-hnd single-def "Inline stloc first use temp" <System.Attribute[]>
-;  V12 tmp7         [V12,T07] (  3,  3   )     int  ->  r14         "Inline stloc first use temp"
-;  V13 tmp8         [V13,T02] (  5, 10   )     ref  ->  r13         class-hnd exact single-def "NewObj constructor temp" <System.SZGenericArrayEnumerator`1[System.Attribute]>
-;  V14 rat0         [V14    ] (  1,  1   )    long  ->  [rbp-0x40]  do-not-enreg[V] "PSPSym"
+;  V12 tmp7         [V12,T10] (  2,  2   )     int  ->  rdi         "Inline stloc first use temp"
+;* V13 tmp8         [V13    ] (  0,  0   )    long  ->  zero-ref    class-hnd exact "NewObj constructor temp" <System.SZGenericArrayEnumerator`1[System.Attribute]>
+;* V14 tmp9         [V14    ] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
+;  V15 tmp10        [V15,T02] (  3, 48   )     int  ->  rcx         "Inline stloc first use temp"
+;* V16 tmp11        [V16    ] (  0,  0   )  struct (24) zero-ref    do-not-enreg[SF] "stack allocated ref class temp" <System.SZGenericArrayEnumerator`1[System.Attribute]>
+;* V17 tmp12        [V17    ] (  0,  0   )    long  ->  zero-ref    "V16.[000..008)"
+;  V18 tmp13        [V18,T01] (  4, 73   )     int  ->  rcx         "V16.[008..012)"
+;  V19 tmp14        [V19,T04] (  2,  9   )     int  ->  rdi         "V16.[012..016)"
+;  V20 tmp15        [V20,T03] (  2, 33   )     ref  ->  rax         single-def "V16.[016..024)"
+;  V21 cse0         [V21,T11] (  2,  2   )     int  ->  rdi         "CSE #01: aggressive"
 ;
-; Lcl frame size = 32
+; Lcl frame size = 8
 
 G_M48529_IG01:
        push     rbp
-       push     r15
-       push     r14
-       push     r13
        push     rbx
-       sub      rsp, 32
-       lea      rbp, [rsp+0x40]
-       xor      eax, eax
-       mov      qword ptr [rbp-0x30], rax
-       mov      qword ptr [rbp-0x40], rsp
+       push     rax
+       lea      rbp, [rsp+0x10]
        mov      rbx, rdi
-						;; size=30 bbWeight=1 PerfScore 8.25
+						;; size=11 bbWeight=1 PerfScore 3.75
 G_M48529_IG02:
        mov      rdi, rsi
        mov      esi, 1
        mov      rax, 0xD1FFAB1E      ; code for System.Attribute:GetCustomAttributes(System.Reflection.MemberInfo,ubyte):System.Attribute[]
        call     [rax]System.Attribute:GetCustomAttributes(System.Reflection.MemberInfo,ubyte):System.Attribute[]
-       mov      r15, rax
-       mov      r14d, dword ptr [r15+0x08]
-       test     r14d, r14d
-       jne      SHORT G_M48529_IG04
-       mov      rdi, 0xD1FFAB1E      ; global ptr
-       test     byte  ptr [rdi], 1
-       je       G_M48529_IG15
-						;; size=51 bbWeight=1 PerfScore 11.50
+       mov      edi, dword ptr [rax+0x08]
+       mov      ecx, -1
+       align    [0 bytes for IG03]
+						;; size=28 bbWeight=1 PerfScore 6.00
 G_M48529_IG03:
-       mov      rdi, 0xD1FFAB1E      ; data for System.SZGenericArrayEnumerator`1[System.Attribute]:Empty
-       mov      r13, gword ptr [rdi]
-       jmp      SHORT G_M48529_IG05
-						;; size=15 bbWeight=1 PerfScore 4.25
+       inc      ecx
+       cmp      ecx, edi
+       jae      SHORT G_M48529_IG08
+						;; size=6 bbWeight=8 PerfScore 12.00
 G_M48529_IG04:
-       mov      rdi, 0xD1FFAB1E      ; System.SZGenericArrayEnumerator`1[System.Attribute]
-       call     CORINFO_HELP_NEWSFAST
-       mov      r13, rax
-       mov      dword ptr [r13+0x08], -1
-       mov      dword ptr [r13+0x0C], r14d
-       lea      rdi, bword ptr [r13+0x10]
-       mov      rsi, r15
-       call     CORINFO_HELP_ASSIGN_REF
-						;; size=42 bbWeight=1 PerfScore 5.25
+       mov      edx, ecx
+       mov      rdx, gword ptr [rax+8*rdx+0x10]
+       test     rdx, rdx
+       je       SHORT G_M48529_IG03
+						;; size=12 bbWeight=32 PerfScore 112.00
 G_M48529_IG05:
-       mov      gword ptr [rbp-0x28], r13
-						;; size=4 bbWeight=1 PerfScore 1.00
+       mov      rsi, 0xD1FFAB1E      ; System.ComponentModel.DataAnnotations.DisplayAttribute
+       cmp      qword ptr [rdx], rsi
+       jne      SHORT G_M48529_IG03
+						;; size=15 bbWeight=128 PerfScore 544.00
 G_M48529_IG06:
-       mov      rdi, gword ptr [rbp-0x28]
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.IEnumerator:MoveNext():ubyte:this
-       call     [r11]System.Collections.IEnumerator:MoveNext():ubyte:this
-       test     eax, eax
-       je       SHORT G_M48529_IG13
-       mov      rdi, gword ptr [rbp-0x28]
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IEnumerator`1[System.__Canon]:get_Current():System.__Canon:this
-       call     [r11]System.Collections.Generic.IEnumerator`1[System.__Canon]:get_Current():System.__Canon:this
-       test     rax, rax
-       je       SHORT G_M48529_IG06
-						;; size=43 bbWeight=8 PerfScore 88.00
-G_M48529_IG07:
-       mov      rdi, 0xD1FFAB1E      ; System.ComponentModel.DataAnnotations.DisplayAttribute
-       cmp      qword ptr [rax], rdi
-       jne      SHORT G_M48529_IG06
-						;; size=15 bbWeight=32 PerfScore 136.00
-G_M48529_IG08:
-       mov      rdi, gword ptr [rax+0x18]
+       mov      rdi, gword ptr [rdx+0x18]
        mov      rax, 0xD1FFAB1E      ; code for System.ComponentModel.DataAnnotations.LocalizableString:GetLocalizableValue():System.String:this
        cmp      dword ptr [rdi], edi
        call     [rax]System.ComponentModel.DataAnnotations.LocalizableString:GetLocalizableValue():System.String:this
-       mov      gword ptr [rbp-0x30], rax
-						;; size=22 bbWeight=1 PerfScore 9.25
-G_M48529_IG09:
-       mov      rdi, rsp
-						;; size=3 bbWeight=1 PerfScore 0.25
-G_M48529_IG10:
-       call     G_M48529_IG16
-       nop      
-						;; size=6 bbWeight=1 PerfScore 1.25
-G_M48529_IG11:
-       mov      rax, gword ptr [rbp-0x30]
-						;; size=4 bbWeight=1 PerfScore 1.00
-G_M48529_IG12:
-       add      rsp, 32
+       mov      gword ptr [rbp-0x10], rax
+       mov      rax, gword ptr [rbp-0x10]
+						;; size=26 bbWeight=1 PerfScore 10.25
+G_M48529_IG07:
+       add      rsp, 8
        pop      rbx
-       pop      r13
-       pop      r14
-       pop      r15
        pop      rbp
        ret      
-						;; size=13 bbWeight=1 PerfScore 3.75
-G_M48529_IG13:
-       mov      rdi, gword ptr [rbp-0x28]
-       mov      r11, 0xD1FFAB1E      ; code for System.IDisposable:Dispose():this
-       call     [r11]System.IDisposable:Dispose():this
+						;; size=7 bbWeight=1 PerfScore 2.25
+G_M48529_IG08:
        mov      rax, gword ptr [rbx+0x38]
-						;; size=21 bbWeight=1 PerfScore 6.25
-G_M48529_IG14:
-       add      rsp, 32
+						;; size=4 bbWeight=1 PerfScore 2.00
+G_M48529_IG09:
+       add      rsp, 8
        pop      rbx
-       pop      r13
-       pop      r14
-       pop      r15
        pop      rbp
        ret      
-						;; size=13 bbWeight=1 PerfScore 3.75
-G_M48529_IG15:
-       mov      rdi, 0xD1FFAB1E      ; System.SZGenericArrayEnumerator`1[System.Attribute]
-       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_GET_GCSTATIC_BASE
-       call     [rax]CORINFO_HELP_GET_GCSTATIC_BASE
-       jmp      G_M48529_IG03
-						;; size=27 bbWeight=0 PerfScore 0.00
-G_M48529_IG16:
-       push     rbp
-       push     r15
-       push     r14
-       push     r13
-       push     rbx
-       sub      rsp, 16
-       mov      rbp, qword ptr [rdi]
-       mov      qword ptr [rsp], rbp
-       lea      rbp, [rbp+0x40]
-						;; size=23 bbWeight=1 PerfScore 8.75
-G_M48529_IG17:
-       cmp      gword ptr [rbp-0x28], 0
-       je       SHORT G_M48529_IG18
-       mov      rdi, gword ptr [rbp-0x28]
-       mov      r11, 0xD1FFAB1E      ; code for System.IDisposable:Dispose():this
-       call     [r11]System.IDisposable:Dispose():this
-						;; size=24 bbWeight=1 PerfScore 7.25
-G_M48529_IG18:
-       nop      
-						;; size=1 bbWeight=1 PerfScore 0.25
-G_M48529_IG19:
-       add      rsp, 16
-       pop      rbx
-       pop      r13
-       pop      r14
-       pop      r15
-       pop      rbp
-       ret      
-						;; size=13 bbWeight=1 PerfScore 3.75
+						;; size=7 bbWeight=1 PerfScore 2.25
 
-; Total bytes of code 370, prolog size 30, PerfScore 299.75, instruction count 100, allocated bytes for code 370 (MethodHash=37d3426e) for method System.ComponentModel.DataAnnotations.CompareAttribute:GetDisplayNameForProperty(System.Reflection.PropertyInfo):System.String:this (FullOpts)
+; Total bytes of code 116, prolog size 11, PerfScore 694.50, instruction count 37, allocated bytes for code 116 (MethodHash=37d3426e) for method System.ComponentModel.DataAnnotations.CompareAttribute:GetDisplayNameForProperty(System.Reflection.PropertyInfo):System.String:this (FullOpts)
 ; ============================================================

-227 (-56.05 % of base) - System.Composition.Convention.PartConventionBuilder:MemberHasExportMetadata(System.Reflection.MemberInfo):ubyte

 ; Assembly listing for method System.Composition.Convention.PartConventionBuilder:MemberHasExportMetadata(System.Reflection.MemberInfo):ubyte (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX512 - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; fully interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 11 single block inlinees; 4 inlinees without PGO data
+; 0 inlinees with PGO data; 12 single block inlinees; 6 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 arg0         [V00,T06] (  3,  3   )     ref  ->  rdi         class-hnd single-def <System.Reflection.MemberInfo>
-;  V01 loc0         [V01,T03] (  6, 19   )     ref  ->  [rbp-0x28]  class-hnd EH-live single-def <System.Collections.Generic.IEnumerator`1[System.Attribute]>
-;  V02 loc1         [V02,T00] (  4, 26   )     ref  ->  rax         class-hnd <System.Attribute>
-;  V03 loc2         [V03,T09] (  2,  2   )   ubyte  ->  [rbp-0x1C]  do-not-enreg[Z] must-init EH-live
-;  V04 loc3         [V04,T01] (  3, 24   )     ref  ->  rdi         class-hnd exact <System.RuntimeType>
+;  V00 arg0         [V00,T08] (  3,  3   )     ref  ->  rdi         class-hnd single-def <System.Reflection.MemberInfo>
+;* V01 loc0         [V01    ] (  0,  0   )   byref  ->  zero-ref    class-hnd exact <System.SZGenericArrayEnumerator`1[System.Attribute]>
+;  V02 loc1         [V02,T00] (  4,104   )     ref  ->  rdi         class-hnd <System.Attribute>
+;  V03 loc2         [V03,T09] (  2,  2   )   ubyte  ->  [rbp-0x1C]  do-not-enreg[Z] EH-live
+;  V04 loc3         [V04,T01] (  3, 96   )     ref  ->  rdi         class-hnd exact <System.RuntimeType>
 ;# V05 OutArgs      [V05    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;* V06 tmp1         [V06    ] (  0,  0   )     int  ->  zero-ref    "spilling qmarkNull"
-;  V07 tmp2         [V07,T05] (  3,  6   )     ref  ->  rbx         single-def "Spilling to split statement for tree"
-;  V08 tmp3         [V08,T07] (  3,  3   )     ref  ->  r14         class-hnd "Inline return value spill temp" <System.Collections.Generic.IEnumerator`1[System.Attribute]>
+;  V07 tmp2         [V07,T07] (  3,  6   )     ref  ->  rbx         single-def "Spilling to split statement for tree"
+;* V08 tmp3         [V08    ] (  0,  0   )   byref  ->  zero-ref    class-hnd exact "Inline return value spill temp" <System.SZGenericArrayEnumerator`1[System.Attribute]>
 ;* V09 tmp4         [V09    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "updating class info" <System.Attribute[]>
 ;* V10 tmp5         [V10    ] (  0,  0   )     ref  ->  zero-ref    class-hnd single-def "Inline stloc first use temp" <System.Attribute[]>
-;  V11 tmp6         [V11,T08] (  3,  3   )     int  ->  r15         single-def "Inline stloc first use temp"
-;  V12 tmp7         [V12,T04] (  5, 10   )     ref  ->  r14         class-hnd exact single-def "NewObj constructor temp" <System.SZGenericArrayEnumerator`1[System.Attribute]>
-;  V13 tmp8         [V13,T02] (  3, 24   )     ref  ->  rdi         class-hnd "Inline return value spill temp" <System.Reflection.TypeInfo>
+;  V11 tmp6         [V11,T10] (  2,  2   )     int  ->  r15         single-def "Inline stloc first use temp"
+;* V12 tmp7         [V12    ] (  0,  0   )    long  ->  zero-ref    class-hnd exact "NewObj constructor temp" <System.SZGenericArrayEnumerator`1[System.Attribute]>
+;  V13 tmp8         [V13,T02] (  3, 96   )     ref  ->  rdi         class-hnd "Inline return value spill temp" <System.Reflection.TypeInfo>
 ;* V14 tmp9         [V14    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inline stloc first use temp" <System.RuntimeType>
 ;* V15 tmp10        [V15    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "NewObj constructor temp" <System.Reflection.TypeDelegator>
-;  V16 rat0         [V16    ] (  1,  1   )    long  ->  [rbp-0x30]  do-not-enreg[V] "PSPSym"
+;* V16 tmp11        [V16    ] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
+;  V17 tmp12        [V17,T04] (  3, 48   )     int  ->  r14         "Inline stloc first use temp"
+;* V18 tmp13        [V18    ] (  0,  0   )  struct (24) zero-ref    do-not-enreg[SF] "stack allocated ref class temp" <System.SZGenericArrayEnumerator`1[System.Attribute]>
+;* V19 tmp14        [V19    ] (  0,  0   )    long  ->  zero-ref    single-def "V18.[000..008)"
+;* V20 tmp15        [V20,T12] (  0,  0   )     int  ->  zero-ref    "V18.[008..012)"
+;  V21 tmp16        [V21,T06] (  2,  9   )     int  ->  r15         single-def "V18.[012..016)"
+;  V22 tmp17        [V22,T05] (  2, 33   )     ref  ->  rbx         single-def "V18.[016..024)"
+;  V23 cse0         [V23,T11] (  2,  2   )     int  ->  r15         "CSE #01: aggressive"
+;  V24 rat0         [V24,T03] (  4, 73   )    long  ->  r14         "Widened IV V20"
 ;
-; Lcl frame size = 24
+; Lcl frame size = 8
 
 G_M63390_IG01:
        push     rbp
        push     r15
        push     r14
        push     rbx
-       sub      rsp, 24
-       lea      rbp, [rsp+0x30]
-       xor      eax, eax
-       mov      dword ptr [rbp-0x1C], eax
-       mov      qword ptr [rbp-0x30], rsp
-						;; size=24 bbWeight=1 PerfScore 7.00
+       push     rax
+       lea      rbp, [rsp+0x20]
+						;; size=12 bbWeight=1 PerfScore 5.50
 G_M63390_IG02:
        mov      rsi, 0xD1FFAB1E      ; 'System.Attribute'
        xor      edx, edx
        mov      rax, 0xD1FFAB1E      ; code for System.Attribute:GetCustomAttributes(System.Reflection.MemberInfo,System.Type,ubyte):System.Attribute[]
        call     [rax]System.Attribute:GetCustomAttributes(System.Reflection.MemberInfo,System.Type,ubyte):System.Attribute[]
        mov      rbx, rax
        mov      r15d, dword ptr [rbx+0x08]
-       test     r15d, r15d
-       jne      SHORT G_M63390_IG04
-       mov      rdi, 0xD1FFAB1E      ; global ptr
-       test     byte  ptr [rdi], 1
-       je       G_M63390_IG16
-						;; size=55 bbWeight=1 PerfScore 11.50
+       mov      r14d, 0xD1FFAB1E
+						;; size=37 bbWeight=1 PerfScore 6.25
 G_M63390_IG03:
-       mov      rdi, 0xD1FFAB1E      ; data for System.SZGenericArrayEnumerator`1[System.Attribute]:Empty
-       mov      r14, gword ptr [rdi]
-       jmp      SHORT G_M63390_IG05
-						;; size=15 bbWeight=1 PerfScore 4.25
+       inc      r14d
+       cmp      r14d, r15d
+       jae      SHORT G_M63390_IG09
+						;; size=8 bbWeight=8 PerfScore 12.00
 G_M63390_IG04:
-       mov      rdi, 0xD1FFAB1E      ; System.SZGenericArrayEnumerator`1[System.Attribute]
-       call     CORINFO_HELP_NEWSFAST
-       mov      r14, rax
-       mov      dword ptr [r14+0x08], -1
-       mov      dword ptr [r14+0x0C], r15d
-       lea      rdi, bword ptr [r14+0x10]
-       mov      rsi, rbx
-       call     CORINFO_HELP_ASSIGN_REF
-						;; size=42 bbWeight=1 PerfScore 5.25
+       mov      r14d, r14d
+       mov      rdi, gword ptr [rbx+8*r14+0x10]
+       test     rdi, rdi
+       je       SHORT G_M63390_IG06
+						;; size=13 bbWeight=32 PerfScore 112.00
 G_M63390_IG05:
-       mov      gword ptr [rbp-0x28], r14
-						;; size=4 bbWeight=1 PerfScore 1.00
+       mov      rax, 0xD1FFAB1E      ; System.Composition.ExportMetadataAttribute
+       cmp      qword ptr [rdi], rax
+       je       SHORT G_M63390_IG07
+						;; size=15 bbWeight=8 PerfScore 34.00
 G_M63390_IG06:
-       mov      rdi, gword ptr [rbp-0x28]
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.IEnumerator:MoveNext():ubyte:this
-       call     [r11]System.Collections.IEnumerator:MoveNext():ubyte:this
-       test     eax, eax
-       je       G_M63390_IG14
-       mov      rdi, gword ptr [rbp-0x28]
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IEnumerator`1[System.__Canon]:get_Current():System.__Canon:this
-       call     [r11]System.Collections.Generic.IEnumerator`1[System.__Canon]:get_Current():System.__Canon:this
-       test     rax, rax
-       je       SHORT G_M63390_IG08
-						;; size=47 bbWeight=8 PerfScore 88.00
-G_M63390_IG07:
-       mov      rdi, 0xD1FFAB1E      ; System.Composition.ExportMetadataAttribute
-       cmp      qword ptr [rax], rdi
-       je       SHORT G_M63390_IG09
-						;; size=15 bbWeight=2 PerfScore 8.50
-G_M63390_IG08:
-       mov      rdi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.Object:GetType():System.Type:this
        call     [rax]System.Object:GetType():System.Type:this
        mov      rdi, rax
        mov      rsi, 0xD1FFAB1E      ; 'System.Composition.ExportAttribute'
        cmp      rdi, rsi
-       je       SHORT G_M63390_IG06
+       je       SHORT G_M63390_IG03
        mov      rsi, 0xD1FFAB1E      ; 'System.Composition.MetadataAttributeAttribute'
        mov      edx, 1
        mov      rax, qword ptr [rdi]
        mov      rax, qword ptr [rax+0x48]
        call     [rax+0x18]System.Reflection.MemberInfo:IsDefined(System.Type,ubyte):ubyte:this
        test     eax, eax
-       je       SHORT G_M63390_IG06
-						;; size=62 bbWeight=8 PerfScore 112.00
-G_M63390_IG09:
+       je       SHORT G_M63390_IG03
+						;; size=59 bbWeight=32 PerfScore 440.00
+G_M63390_IG07:
        mov      dword ptr [rbp-0x1C], 1
-						;; size=7 bbWeight=1 PerfScore 1.00
-G_M63390_IG10:
-       mov      rdi, rsp
-						;; size=3 bbWeight=1 PerfScore 0.25
-G_M63390_IG11:
-       call     G_M63390_IG17
-       nop      
-						;; size=6 bbWeight=1 PerfScore 1.25
-G_M63390_IG12:
        mov      eax, dword ptr [rbp-0x1C]
-						;; size=3 bbWeight=1 PerfScore 1.00
-G_M63390_IG13:
-       add      rsp, 24
+						;; size=10 bbWeight=1 PerfScore 2.00
+G_M63390_IG08:
+       add      rsp, 8
        pop      rbx
        pop      r14
        pop      r15
        pop      rbp
        ret      
 						;; size=11 bbWeight=1 PerfScore 3.25
-G_M63390_IG14:
-       mov      rdi, gword ptr [rbp-0x28]
-       mov      r11, 0xD1FFAB1E      ; code for System.IDisposable:Dispose():this
-       call     [r11]System.IDisposable:Dispose():this
+G_M63390_IG09:
        xor      eax, eax
-						;; size=19 bbWeight=1 PerfScore 4.50
-G_M63390_IG15:
-       add      rsp, 24
-       pop      rbx
-       pop      r14
-       pop      r15
-       pop      rbp
-       ret      
-						;; size=11 bbWeight=1 PerfScore 3.25
-G_M63390_IG16:
-       mov      rdi, 0xD1FFAB1E      ; System.SZGenericArrayEnumerator`1[System.Attribute]
-       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_GET_GCSTATIC_BASE
-       call     [rax]CORINFO_HELP_GET_GCSTATIC_BASE
-       jmp      G_M63390_IG03
-						;; size=27 bbWeight=0 PerfScore 0.00
-G_M63390_IG17:
-       push     rbp
-       push     r15
-       push     r14
-       push     rbx
-       push     rax
-       mov      rbp, qword ptr [rdi]
-       mov      qword ptr [rsp], rbp
-       lea      rbp, [rbp+0x30]
-						;; size=18 bbWeight=1 PerfScore 8.50
-G_M63390_IG18:
-       cmp      gword ptr [rbp-0x28], 0
-       je       SHORT G_M63390_IG19
-       mov      rdi, gword ptr [rbp-0x28]
-       mov      r11, 0xD1FFAB1E      ; code for System.IDisposable:Dispose():this
-       call     [r11]System.IDisposable:Dispose():this
-						;; size=24 bbWeight=1 PerfScore 7.25
-G_M63390_IG19:
-       nop      
-						;; size=1 bbWeight=1 PerfScore 0.25
-G_M63390_IG20:
+						;; size=2 bbWeight=1 PerfScore 0.25
+G_M63390_IG10:
        add      rsp, 8
        pop      rbx
        pop      r14
        pop      r15
        pop      rbp
        ret      
 						;; size=11 bbWeight=1 PerfScore 3.25
 
-; Total bytes of code 405, prolog size 24, PerfScore 271.25, instruction count 104, allocated bytes for code 405 (MethodHash=b71e0861) for method System.Composition.Convention.PartConventionBuilder:MemberHasExportMetadata(System.Reflection.MemberInfo):ubyte (FullOpts)
+; Total bytes of code 178, prolog size 12, PerfScore 618.50, instruction count 51, allocated bytes for code 178 (MethodHash=b71e0861) for method System.Composition.Convention.PartConventionBuilder:MemberHasExportMetadata(System.Reflection.MemberInfo):ubyte (FullOpts)
 ; ============================================================

-196 (-30.02 % of base) - Microsoft.CSharp.RuntimeBinder.Semantics.TypeManager:InternalsVisibleTo(System.Reflection.Assembly,System.Reflection.Assembly):ubyte

 ; Assembly listing for method Microsoft.CSharp.RuntimeBinder.Semantics.TypeManager:InternalsVisibleTo(System.Reflection.Assembly,System.Reflection.Assembly):ubyte (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX512 - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; fully interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 9 single block inlinees; 3 inlinees without PGO data
+; 0 inlinees with PGO data; 10 single block inlinees; 5 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 arg0         [V00,T07] (  4,  4   )     ref  ->  rdi         class-hnd single-def <System.Reflection.Assembly>
-;  V01 arg1         [V01,T08] (  4,  4   )     ref  ->  rdx         class-hnd single-def <System.Reflection.Assembly>
+;  V00 arg0         [V00,T09] (  4,  4   )     ref  ->  rdi         class-hnd single-def <System.Reflection.Assembly>
+;  V01 arg1         [V01,T10] (  4,  4   )     ref  ->  rdx         class-hnd single-def <System.Reflection.Assembly>
 ;* V02 loc0         [V02    ] (  0,  0   )  struct (16) zero-ref    multireg-arg <System.ValueTuple`2[System.Reflection.Assembly,System.Reflection.Assembly]>
-;  V03 loc1         [V03,T10] (  6,  5   )   ubyte  ->  [rbp-0x24]  do-not-enreg[Z] ld-addr-op EH-live
-;  V04 loc2         [V04,T05] (  2,  9   )     ref  ->  rbx         class-hnd exact single-def <System.Reflection.AssemblyName>
-;  V05 loc3         [V05,T02] (  6, 17   )     ref  ->  [rbp-0x30]  class-hnd EH-live single-def <System.Collections.Generic.IEnumerator`1[System.Attribute]>
-;  V06 loc4         [V06,T03] (  2, 16   )     ref  ->  r15         class-hnd exact <System.Runtime.CompilerServices.InternalsVisibleToAttribute>
+;  V03 loc1         [V03,T12] (  6,  5   )   ubyte  ->  [rbp-0x2C]  do-not-enreg[Z] ld-addr-op EH-live
+;  V04 loc2         [V04,T05] (  2, 33   )     ref  ->  rbx         class-hnd exact single-def <System.Reflection.AssemblyName>
+;* V05 loc3         [V05    ] (  0,  0   )   byref  ->  zero-ref    class-hnd exact <System.SZGenericArrayEnumerator`1[System.Attribute]>
+;  V06 loc4         [V06,T03] (  2, 64   )     ref  ->  r12         class-hnd exact <System.Runtime.CompilerServices.InternalsVisibleToAttribute>
 ;# V07 OutArgs      [V07    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;* V08 tmp1         [V08    ] (  0,  0   )  struct (16) zero-ref    multireg-arg ld-addr-op "NewObj constructor temp" <System.ValueTuple`2[System.Reflection.Assembly,System.Reflection.Assembly]>
-;  V09 tmp2         [V09,T00] (  4,112   )     ref  ->  r15         "ISINST eval op1"
+;  V09 tmp2         [V09,T00] (  4,448   )     ref  ->  r12         "ISINST eval op1"
 ;* V10 tmp3         [V10    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "spilling qmarkNull" <System.Runtime.CompilerServices.InternalsVisibleToAttribute>
-;  V11 tmp4         [V11,T01] (  3, 48   )     ref  ->  r14         class-hnd exact "NewObj constructor temp" <System.Reflection.AssemblyName>
+;  V11 tmp4         [V11,T01] (  3,192   )     ref  ->  [rbp-0x38]  class-hnd exact spill-single-def "NewObj constructor temp" <System.Reflection.AssemblyName>
 ;* V12 tmp5         [V12    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "impSpillSpecialSideEff" <System.Security.SecurityException>
 ;* V13 tmp6         [V13    ] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
-;  V14 tmp7         [V14,T13] (  2,  4   )     ref  ->  rcx         class-hnd exact single-def "Inlining Arg" <System.Collections.Generic.Dictionary`2[System.ValueTuple`2[System.Reflection.Assembly,System.Reflection.Assembly],ubyte]>
-;  V15 tmp8         [V15,T16] (  3,  3   )   byref  ->  rax         single-def "Inline stloc first use temp"
-;  V16 tmp9         [V16,T09] (  3,  6   )     ref  ->  r15         single-def "Spilling to split statement for tree"
-;  V17 tmp10        [V17,T17] (  3,  3   )     ref  ->  r13         class-hnd "Inline return value spill temp" <System.Collections.Generic.IEnumerator`1[System.Attribute]>
+;  V14 tmp7         [V14,T15] (  2,  4   )     ref  ->  rcx         class-hnd exact single-def "Inlining Arg" <System.Collections.Generic.Dictionary`2[System.ValueTuple`2[System.Reflection.Assembly,System.Reflection.Assembly],ubyte]>
+;  V15 tmp8         [V15,T18] (  3,  3   )   byref  ->  rax         single-def "Inline stloc first use temp"
+;  V16 tmp9         [V16,T11] (  3,  6   )     ref  ->  r15         single-def "Spilling to split statement for tree"
+;* V17 tmp10        [V17    ] (  0,  0   )   byref  ->  zero-ref    class-hnd exact "Inline return value spill temp" <System.SZGenericArrayEnumerator`1[System.Attribute]>
 ;* V18 tmp11        [V18    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "updating class info" <System.Attribute[]>
 ;* V19 tmp12        [V19    ] (  0,  0   )     ref  ->  zero-ref    class-hnd single-def "Inline stloc first use temp" <System.Attribute[]>
-;  V20 tmp13        [V20,T18] (  3,  3   )     int  ->  r14         "Inline stloc first use temp"
-;  V21 tmp14        [V21,T04] (  5, 10   )     ref  ->  r13         class-hnd exact single-def "NewObj constructor temp" <System.SZGenericArrayEnumerator`1[System.Attribute]>
-;  V22 tmp15        [V22,T14] (  2,  4   )     ref  ->  rdi         class-hnd exact single-def "Inlining Arg" <System.Collections.Generic.Dictionary`2[System.ValueTuple`2[System.Reflection.Assembly,System.Reflection.Assembly],ubyte]>
-;* V23 tmp16        [V23    ] (  0,  0   )   ubyte  ->  zero-ref    "Inlining Arg"
-;  V24 tmp17        [V24,T12] (  5,  4   )     ref  ->  [rbp-0x38]  EH-live spill-single-def "field V02.Item1 (fldOffset=0x0)" P-INDEP
-;  V25 tmp18        [V25,T15] (  4,  3   )     ref  ->  [rbp-0x40]  EH-live spill-single-def "field V02.Item2 (fldOffset=0x8)" P-INDEP
-;* V26 tmp19        [V26,T20] (  0,  0   )     ref  ->  zero-ref    single-def "field V08.Item1 (fldOffset=0x0)" P-INDEP
-;* V27 tmp20        [V27,T21] (  0,  0   )     ref  ->  zero-ref    single-def "field V08.Item2 (fldOffset=0x8)" P-INDEP
-;  V28 tmp21        [V28,T11] (  3,  4.50)     ref  ->  rax         single-def "argument with side effect"
-;  V29 rat0         [V29    ] (  1,  1   )    long  ->  [rbp-0x50]  do-not-enreg[V] "PSPSym"
-;  V30 rat1         [V30,T06] (  5,  7.50)     ref  ->  r15         "replacement local"
-;  V31 rat2         [V31,T19] (  3,  2.50)    long  ->  rdi         "CSE for expectedClsNode"
+;  V20 tmp13        [V20,T20] (  2,  2   )     int  ->  r14         "Inline stloc first use temp"
+;* V21 tmp14        [V21    ] (  0,  0   )    long  ->  zero-ref    class-hnd exact "NewObj constructor temp" <System.SZGenericArrayEnumerator`1[System.Attribute]>
+;* V22 tmp15        [V22    ] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
+;  V23 tmp16        [V23,T04] (  3, 48   )     int  ->  r13         "Inline stloc first use temp"
+;  V24 tmp17        [V24,T16] (  2,  4   )     ref  ->  rdi         class-hnd exact single-def "Inlining Arg" <System.Collections.Generic.Dictionary`2[System.ValueTuple`2[System.Reflection.Assembly,System.Reflection.Assembly],ubyte]>
+;* V25 tmp18        [V25    ] (  0,  0   )   ubyte  ->  zero-ref    "Inlining Arg"
+;* V26 tmp19        [V26    ] (  0,  0   )  struct (24) zero-ref    do-not-enreg[SF] "stack allocated ref class temp" <System.SZGenericArrayEnumerator`1[System.Attribute]>
+;  V27 tmp20        [V27,T14] (  5,  4   )     ref  ->  [rbp-0x40]  EH-live spill-single-def "field V02.Item1 (fldOffset=0x0)" P-INDEP
+;  V28 tmp21        [V28,T17] (  4,  3   )     ref  ->  [rbp-0x48]  EH-live spill-single-def "field V02.Item2 (fldOffset=0x8)" P-INDEP
+;* V29 tmp22        [V29,T22] (  0,  0   )     ref  ->  zero-ref    single-def "field V08.Item1 (fldOffset=0x0)" P-INDEP
+;* V30 tmp23        [V30,T23] (  0,  0   )     ref  ->  zero-ref    single-def "field V08.Item2 (fldOffset=0x8)" P-INDEP
+;* V31 tmp24        [V31    ] (  0,  0   )    long  ->  zero-ref    "V26.[000..008)"
+;* V32 tmp25        [V32,T24] (  0,  0   )     int  ->  zero-ref    "V26.[008..012)"
+;  V33 tmp26        [V33,T07] (  2,  9   )     int  ->  r14         "V26.[012..016)"
+;  V34 tmp27        [V34,T06] (  2, 33   )     ref  ->  r15         single-def "V26.[016..024)"
+;  V35 tmp28        [V35,T13] (  3,  4.50)     ref  ->  rax         single-def "argument with side effect"
+;  V36 cse0         [V36,T21] (  2,  2   )     int  ->  r14         "CSE #01: aggressive"
+;  V37 rat0         [V37,T02] (  4, 73   )    long  ->  r13         "Widened IV V32"
+;  V38 rat1         [V38    ] (  1,  1   )    long  ->  [rbp-0x50]  do-not-enreg[V] "PSPSym"
+;  V39 rat2         [V39,T08] (  5,  7.50)     ref  ->  r15         "replacement local"
+;  V40 rat3         [V40,T19] (  3,  2.50)    long  ->  rdi         "CSE for expectedClsNode"
 ;
-; Lcl frame size = 48
+; Lcl frame size = 40
 
 G_M48286_IG01:
        push     rbp
        push     r15
        push     r14
        push     r13
+       push     r12
        push     rbx
-       sub      rsp, 48
+       sub      rsp, 40
        lea      rbp, [rsp+0x50]
        mov      qword ptr [rbp-0x50], rsp
        mov      rdx, rsi
-						;; size=24 bbWeight=1 PerfScore 7.00
+						;; size=26 bbWeight=1 PerfScore 8.00
 G_M48286_IG02:
-       mov      gword ptr [rbp-0x38], rdi
-       mov      gword ptr [rbp-0x40], rdx
+       mov      gword ptr [rbp-0x40], rdi
+       mov      gword ptr [rbp-0x48], rdx
        mov      rcx, 0xD1FFAB1E      ; const ptr
        mov      rcx, gword ptr [rcx]
        mov      rsi, rdi
        mov      rdi, rcx
        mov      rcx, 0xD1FFAB1E      ; code for System.Collections.Generic.Dictionary`2[System.ValueTuple`2[System.__Canon,System.__Canon],ubyte]:FindValue(System.ValueTuple`2[System.__Canon,System.__Canon]):byref:this
        call     [rcx]System.Collections.Generic.Dictionary`2[System.ValueTuple`2[System.__Canon,System.__Canon],ubyte]:FindValue(System.ValueTuple`2[System.__Canon,System.__Canon]):byref:this
        test     rax, rax
-       jne      G_M48286_IG18
+       jne      G_M48286_IG14
        xor      edi, edi
-       mov      dword ptr [rbp-0x24], edi
+       mov      dword ptr [rbp-0x2C], edi
 						;; size=53 bbWeight=1 PerfScore 10.50
 G_M48286_IG03:
-       mov      rdi, gword ptr [rbp-0x40]
+       mov      rdi, gword ptr [rbp-0x48]
        mov      rax, qword ptr [rdi]
        mov      rax, qword ptr [rax+0x50]
        call     [rax+0x28]System.Reflection.Assembly:GetName():System.Reflection.AssemblyName:this
        mov      rbx, rax
-       mov      rsi, gword ptr [rbp-0x38]
+       mov      rsi, gword ptr [rbp-0x40]
        test     rsi, rsi
-       je       G_M48286_IG15
+       je       G_M48286_IG12
        mov      rdi, rsi
        mov      rsi, 0xD1FFAB1E      ; 'System.Attribute'
        mov      edx, 1
-       mov      rax, gword ptr [rbp-0x38]
+       mov      rax, gword ptr [rbp-0x40]
        mov      rcx, qword ptr [rax]
        mov      rcx, qword ptr [rcx+0x58]
        call     [rcx+0x30]System.Reflection.Assembly:GetCustomAttributes(System.Type,ubyte):System.Object[]:this
        mov      r15, rax
        test     r15, r15
        je       SHORT G_M48286_IG06
 						;; size=70 bbWeight=1 PerfScore 20.75
 G_M48286_IG04:
        mov      rdi, 0xD1FFAB1E      ; System.Attribute[]
        cmp      qword ptr [r15], rdi
        je       SHORT G_M48286_IG06
 						;; size=15 bbWeight=0.50 PerfScore 2.12
 G_M48286_IG05:
        mov      rsi, rax
        mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_CHKCASTARRAY
        call     [rax]CORINFO_HELP_CHKCASTARRAY
        mov      r15, rax
 						;; size=18 bbWeight=0.25 PerfScore 0.94
 G_M48286_IG06:
        mov      r14d, dword ptr [r15+0x08]
-       test     r14d, r14d
-       jne      SHORT G_M48286_IG08
-       mov      rdi, 0xD1FFAB1E      ; global ptr
-       test     byte  ptr [rdi], 1
-       je       G_M48286_IG16
-						;; size=28 bbWeight=1 PerfScore 7.50
+       mov      r13d, 0xD1FFAB1E
+						;; size=10 bbWeight=1 PerfScore 2.25
 G_M48286_IG07:
-       mov      rdi, 0xD1FFAB1E      ; data for System.SZGenericArrayEnumerator`1[System.Attribute]:Empty
-       mov      r13, gword ptr [rdi]
-       jmp      SHORT G_M48286_IG09
-						;; size=15 bbWeight=1 PerfScore 4.25
+       inc      r13d
+       cmp      r13d, r14d
+       jae      G_M48286_IG13
+						;; size=12 bbWeight=8 PerfScore 12.00
 G_M48286_IG08:
-       mov      rdi, 0xD1FFAB1E      ; System.SZGenericArrayEnumerator`1[System.Attribute]
-       call     CORINFO_HELP_NEWSFAST
-       mov      r13, rax
-       mov      dword ptr [r13+0x08], -1
-       mov      dword ptr [r13+0x0C], r14d
-       lea      rdi, bword ptr [r13+0x10]
-       mov      rsi, r15
-       call     CORINFO_HELP_ASSIGN_REF
-						;; size=42 bbWeight=1 PerfScore 5.25
+       mov      r13d, r13d
+       mov      r12, gword ptr [r15+8*r13+0x10]
+       test     r12, r12
+       je       SHORT G_M48286_IG07
+						;; size=13 bbWeight=32 PerfScore 112.00
 G_M48286_IG09:
-       mov      gword ptr [rbp-0x30], r13
-						;; size=4 bbWeight=1 PerfScore 1.00
-G_M48286_IG10:
-       mov      rdi, gword ptr [rbp-0x30]
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.IEnumerator:MoveNext():ubyte:this
-       call     [r11]System.Collections.IEnumerator:MoveNext():ubyte:this
-       test     eax, eax
-       je       SHORT G_M48286_IG14
-       mov      rdi, gword ptr [rbp-0x30]
-       mov      r11, 0xD1FFAB1E      ; code for System.Collections.Generic.IEnumerator`1[System.__Canon]:get_Current():System.__Canon:this
-       call     [r11]System.Collections.Generic.IEnumerator`1[System.__Canon]:get_Current():System.__Canon:this
-       mov      r15, rax
-       test     r15, r15
-       je       SHORT G_M48286_IG10
-						;; size=46 bbWeight=8 PerfScore 90.00
-G_M48286_IG11:
        mov      rdi, 0xD1FFAB1E      ; System.Runtime.CompilerServices.InternalsVisibleToAttribute
-       cmp      qword ptr [r15], rdi
-       jne      SHORT G_M48286_IG10
-						;; size=15 bbWeight=32 PerfScore 136.00
-G_M48286_IG12:
+       cmp      qword ptr [r12], rdi
+       jne      SHORT G_M48286_IG07
+						;; size=16 bbWeight=128 PerfScore 544.00
+G_M48286_IG10:
        mov      rdi, 0xD1FFAB1E      ; System.Reflection.AssemblyName
        call     CORINFO_HELP_NEWSFAST
-       mov      r14, rax
-       mov      rsi, gword ptr [r15+0x08]
-       mov      rdi, r14
-       mov      rax, 0xD1FFAB1E      ; code for System.Reflection.AssemblyName:.ctor(System.String):this
-       call     [rax]System.Reflection.AssemblyName:.ctor(System.String):this
-       mov      rdi, r14
+       mov      gword ptr [rbp-0x38], rax
+       mov      rsi, gword ptr [r12+0x08]
+       mov      rdi, rax
+       mov      rcx, 0xD1FFAB1E      ; code for System.Reflection.AssemblyName:.ctor(System.String):this
+       call     [rcx]System.Reflection.AssemblyName:.ctor(System.String):this
+       mov      rdi, gword ptr [rbp-0x38]
        mov      rsi, rbx
        mov      rax, 0xD1FFAB1E      ; code for System.Reflection.AssemblyName:ReferenceMatchesDefinition(System.Reflection.AssemblyName,System.Reflection.AssemblyName):ubyte
        call     [rax]System.Reflection.AssemblyName:ReferenceMatchesDefinition(System.Reflection.AssemblyName,System.Reflection.AssemblyName):ubyte
        test     eax, eax
-       je       SHORT G_M48286_IG10
-						;; size=59 bbWeight=8 PerfScore 96.00
-G_M48286_IG13:
-       mov      dword ptr [rbp-0x24], 1
-						;; size=7 bbWeight=1 PerfScore 1.00
-G_M48286_IG14:
-       mov      rdi, gword ptr [rbp-0x30]
-       mov      r11, 0xD1FFAB1E      ; code for System.IDisposable:Dispose():this
-       call     [r11]System.IDisposable:Dispose():this
-       jmp      SHORT G_M48286_IG17
-						;; size=19 bbWeight=1 PerfScore 6.25
-G_M48286_IG15:
+       je       SHORT G_M48286_IG07
+						;; size=62 bbWeight=32 PerfScore 432.00
+G_M48286_IG11:
+       mov      dword ptr [rbp-0x2C], 1
+       jmp      SHORT G_M48286_IG13
+						;; size=9 bbWeight=1 PerfScore 3.00
+G_M48286_IG12:
        mov      edi, 789
        mov      rsi, 0xD1FFAB1E
        call     CORINFO_HELP_STRCNS
        mov      rdi, rax
        mov      rax, 0xD1FFAB1E      ; code for System.ArgumentNullException:Throw(System.String)
        call     [rax]System.ArgumentNullException:Throw(System.String)
        int3     
 						;; size=36 bbWeight=1 PerfScore 5.25
-G_M48286_IG16:
-       mov      rdi, 0xD1FFAB1E      ; System.SZGenericArrayEnumerator`1[System.Attribute]
-       mov      rax, 0xD1FFAB1E      ; code for CORINFO_HELP_GET_GCSTATIC_BASE
-       call     [rax]CORINFO_HELP_GET_GCSTATIC_BASE
-       jmp      G_M48286_IG07
-						;; size=27 bbWeight=0 PerfScore 0.00
-G_M48286_IG17:
+G_M48286_IG13:
        mov      rsi, 0xD1FFAB1E      ; const ptr
        mov      rdi, gword ptr [rsi]
-       mov      rsi, gword ptr [rbp-0x38]
-       mov      rdx, gword ptr [rbp-0x40]
-       mov      ecx, dword ptr [rbp-0x24]
+       mov      rsi, gword ptr [rbp-0x40]
+       mov      rdx, gword ptr [rbp-0x48]
+       mov      ecx, dword ptr [rbp-0x2C]
        mov      r8d, 1
        mov      rax, 0xD1FFAB1E      ; code for System.Collections.Generic.Dictionary`2[System.ValueTuple`2[System.__Canon,System.__Canon],ubyte]:TryInsert(System.ValueTuple`2[System.__Canon,System.__Canon],ubyte,ubyte):ubyte:this
        call     [rax]System.Collections.Generic.Dictionary`2[System.ValueTuple`2[System.__Canon,System.__Canon],ubyte]:TryInsert(System.ValueTuple`2[System.__Canon,System.__Canon],ubyte,ubyte):ubyte:this
-       jmp      SHORT G_M48286_IG19
+       jmp      SHORT G_M48286_IG15
 						;; size=44 bbWeight=1 PerfScore 10.75
-G_M48286_IG18:
+G_M48286_IG14:
        movzx    rax, byte  ptr [rax]
-       mov      dword ptr [rbp-0x24], eax
+       mov      dword ptr [rbp-0x2C], eax
 						;; size=6 bbWeight=1 PerfScore 3.00
-G_M48286_IG19:
-       mov      eax, dword ptr [rbp-0x24]
+G_M48286_IG15:
+       mov      eax, dword ptr [rbp-0x2C]
 						;; size=3 bbWeight=1 PerfScore 1.00
-G_M48286_IG20:
-       add      rsp, 48
+G_M48286_IG16:
+       add      rsp, 40
        pop      rbx
+       pop      r12
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        ret      
-						;; size=13 bbWeight=1 PerfScore 3.75
-G_M48286_IG21:
+						;; size=15 bbWeight=1 PerfScore 4.25
+G_M48286_IG17:
        push     rbp
        push     r15
        push     r14
        push     r13
+       push     r12
        push     rbx
-       sub      rsp, 16
+       push     rax
        mov      rbp, qword ptr [rdi]
        mov      qword ptr [rsp], rbp
        lea      rbp, [rbp+0x50]
-						;; size=23 bbWeight=0 PerfScore 0.00
-G_M48286_IG22:
-       cmp      gword ptr [rbp-0x30], 0
-       je       SHORT G_M48286_IG23
-       mov      rdi, gword ptr [rbp-0x30]
-       mov      r11, 0xD1FFAB1E      ; code for System.IDisposable:Dispose():this
-       call     [r11]System.IDisposable:Dispose():this
-						;; size=24 bbWeight=0 PerfScore 0.00
-G_M48286_IG23:
-       nop      
-						;; size=1 bbWeight=0 PerfScore 0.00
-G_M48286_IG24:
-       add      rsp, 16
-       pop      rbx
-       pop      r13
-       pop      r14
-       pop      r15
-       pop      rbp
-       ret      
-						;; size=13 bbWeight=0 PerfScore 0.00
-G_M48286_IG25:
-       push     rbp
-       push     r15
-       push     r14
-       push     r13
-       push     rbx
-       sub      rsp, 16
-       mov      rbp, qword ptr [rdi]
-       mov      qword ptr [rsp], rbp
-       lea      rbp, [rbp+0x50]
-						;; size=23 bbWeight=0 PerfScore 0.00
-G_M48286_IG26:
+						;; size=22 bbWeight=0 PerfScore 0.00
+G_M48286_IG18:
        xor      esi, esi
-       mov      dword ptr [rbp-0x24], esi
-       lea      rax, G_M48286_IG17
+       mov      dword ptr [rbp-0x2C], esi
+       lea      rax, G_M48286_IG13
 						;; size=12 bbWeight=0 PerfScore 0.00
-G_M48286_IG27:
-       add      rsp, 16
+G_M48286_IG19:
+       add      rsp, 8
        pop      rbx
+       pop      r12
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        ret      
-						;; size=13 bbWeight=0 PerfScore 0.00
+						;; size=15 bbWeight=0 PerfScore 0.00
 
-; Total bytes of code 653, prolog size 24, PerfScore 412.31, instruction count 167, allocated bytes for code 653 (MethodHash=cab44361) for method Microsoft.CSharp.RuntimeBinder.Semantics.TypeManager:InternalsVisibleTo(System.Reflection.Assembly,System.Reflection.Assembly):ubyte (FullOpts)
+; Total bytes of code 457, prolog size 26, PerfScore 1171.81, instruction count 122, allocated bytes for code 457 (MethodHash=cab44361) for method Microsoft.CSharp.RuntimeBinder.Semantics.TypeManager:InternalsVisibleTo(System.Reflection.Assembly,System.Reflection.Assembly):ubyte (FullOpts)
 ; ============================================================

-19 (-3.16 % of base) - System.IO.File:WriteAllLinesAsync(System.String,System.Collections.Generic.IEnumerable`1[System.String],System.Text.Encoding,ubyte,System.Threading.CancellationToken):System.Threading.Tasks.Task

 ; Assembly listing for method System.IO.File:WriteAllLinesAsync(System.String,System.Collections.Generic.IEnumerable`1[System.String],System.Text.Encoding,ubyte,System.Threading.CancellationToken):System.Threading.Tasks.Task (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX512 - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; fully interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 16 single block inlinees; 4 inlinees without PGO data
+; 0 inlinees with PGO data; 22 single block inlinees; 5 inlinees without PGO data
 ; Final local variable assignments
 ;
 ;  V00 arg0         [V00,T00] (  7,  7   )     ref  ->  rbx         class-hnd single-def <System.String>
-;  V01 arg1         [V01,T04] (  4,  4   )     ref  ->  r14         class-hnd single-def <System.Collections.Generic.IEnumerable`1[System.String]>
-;  V02 arg2         [V02,T05] (  4,  4   )     ref  ->  r13         class-hnd single-def <System.Text.Encoding>
+;  V01 arg1         [V01,T03] (  4,  4   )     ref  ->  r14         class-hnd single-def <System.Collections.Generic.IEnumerable`1[System.String]>
+;  V02 arg2         [V02,T04] (  4,  4   )     ref  ->  r13         class-hnd single-def <System.Text.Encoding>
 ;  V03 arg3         [V03,T09] (  3,  3   )   ubyte  ->  r12         single-def
 ;* V04 arg4         [V04    ] (  0,  0   )  struct ( 8) zero-ref    ld-addr-op single-def <System.Threading.CancellationToken>
 ;* V05 loc0         [V05    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def <System.IO.StreamWriter>
 ;  V06 loc1         [V06,T17] (  2,  0   )     ref  ->  [rbp-0x38]  class-hnd EH-live single-def <System.Threading.Tasks.Task>
 ;  V07 OutArgs      [V07    ] (  1,  1   )  struct (16) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;* V08 tmp1         [V08    ] (  0,  0   )     ref  ->  zero-ref   
 ;* V09 tmp2         [V09    ] (  0,  0   )     ref  ->  zero-ref    single-def
 ;  V10 tmp3         [V10,T11] (  3,  3   )     int  ->  r12        
-;  V11 tmp4         [V11,T01] (  4,  8   )     ref  ->  [rbp-0x40]  class-hnd exact spill-single-def "NewObj constructor temp" <System.IO.FileStream>
+;  V11 tmp4         [V11,T05] (  3,  6   )     ref  ->  [rbp-0x40]  class-hnd exact spill-single-def "NewObj constructor temp" <System.IO.FileStream>
 ;  V12 tmp5         [V12,T06] (  3,  6   )     ref  ->  r12         class-hnd exact single-def "NewObj constructor temp" <System.IO.StreamWriter>
 ;  V13 tmp6         [V13,T18] (  2,  0   )     ref  ->  rdi         class-hnd single-def "impSpillSpecialSideEff" <System.Exception>
 ;* V14 tmp7         [V14,T13] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
 ;* V15 tmp8         [V15,T14] (  0,  0   )   ubyte  ->  zero-ref    "Inline return value spill temp"
 ;* V16 tmp9         [V16    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inlining Arg" <System.Threading.CancellationTokenSource>
 ;* V17 tmp10        [V17    ] (  0,  0   )  struct ( 8) zero-ref    ld-addr-op "Inline ldloca(s) first use temp" <System.Nullable`1[int]>
-;  V18 tmp11        [V18,T12] (  2,  2   )     ref  ->  rax         class-hnd single-def "Inline return value spill temp" <System.IO.Strategies.FileStreamStrategy>
+;* V18 tmp11        [V18    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inline return value spill temp" <System.IO.Strategies.FileStreamStrategy>
 ;* V19 tmp12        [V19    ] (  0,  0   )  struct ( 8) zero-ref    "Inlining Arg" <System.Nullable`1[int]>
-;* V20 tmp13        [V20    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inline stloc first use temp" <System.IO.Strategies.FileStreamStrategy>
+;* V20 tmp13        [V20    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def "Inline stloc first use temp" <System.IO.Strategies.BufferedFileStreamStrategy>
 ;  V21 tmp14        [V21,T07] (  3,  6   )     ref  ->  [rbp-0x48]  class-hnd exact spill-single-def "NewObj constructor temp" <System.IO.Strategies.UnixFileStreamStrategy>
-;* V22 tmp15        [V22    ] (  0,  0   )     ref  ->  zero-ref    class-hnd "Inline return value spill temp" <System.IO.Strategies.FileStreamStrategy>
-;  V23 tmp16        [V23,T02] (  4,  8   )     ref  ->  rbx         class-hnd exact single-def "NewObj constructor temp" <System.IO.Strategies.BufferedFileStreamStrategy>
-;  V24 tmp17        [V24,T03] (  5,  5   )     ref  ->  r15         single-def "field V04._source (fldOffset=0x0)" P-INDEP
-;* V25 tmp18        [V25    ] (  0,  0   )   ubyte  ->  zero-ref    "field V17.hasValue (fldOffset=0x0)" P-INDEP
-;* V26 tmp19        [V26    ] (  0,  0   )     int  ->  zero-ref    "field V17.value (fldOffset=0x4)" P-INDEP
-;* V27 tmp20        [V27,T15] (  0,  0   )   ubyte  ->  zero-ref    "field V19.hasValue (fldOffset=0x0)" P-INDEP
-;* V28 tmp21        [V28,T16] (  0,  0   )     int  ->  zero-ref    "field V19.value (fldOffset=0x4)" P-INDEP
-;  V29 tmp22        [V29,T10] (  2,  4   )     ref  ->  rsi         single-def "argument with side effect"
-;  V30 tmp23        [V30,T08] (  3,  6   )  struct ( 8) [rbp-0x30]  do-not-enreg[SF] "by-value struct argument" <System.Nullable`1[int]>
-;  V31 rat0         [V31    ] (  1,  1   )    long  ->  [rbp-0x50]  do-not-enreg[V] "PSPSym"
+;* V22 tmp15        [V22    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact "Inline return value spill temp" <System.IO.Strategies.BufferedFileStreamStrategy>
+;  V23 tmp16        [V23,T01] (  4,  8   )     ref  ->  rbx         class-hnd exact single-def "NewObj constructor temp" <System.IO.Strategies.BufferedFileStreamStrategy>
+;  V24 tmp17        [V24,T12] (  2,  2   )     ref  ->  rsi         class-hnd "Inline return value spill temp" <System.IO.Strategies.FileStreamStrategy>
+;* V25 tmp18        [V25    ] (  0,  0   )     ref  ->  zero-ref    class-hnd exact single-def "NewObj constructor temp" <System.IO.Strategies.DerivedFileStreamStrategy>
+;  V26 tmp19        [V26,T02] (  5,  5   )     ref  ->  r15         single-def "field V04._source (fldOffset=0x0)" P-INDEP
+;* V27 tmp20        [V27    ] (  0,  0   )   ubyte  ->  zero-ref    "field V17.hasValue (fldOffset=0x0)" P-INDEP
+;* V28 tmp21        [V28    ] (  0,  0   )     int  ->  zero-ref    "field V17.value (fldOffset=0x4)" P-INDEP
+;* V29 tmp22        [V29,T15] (  0,  0   )   ubyte  ->  zero-ref    "field V19.hasValue (fldOffset=0x0)" P-INDEP
+;* V30 tmp23        [V30,T16] (  0,  0   )     int  ->  zero-ref    "field V19.value (fldOffset=0x4)" P-INDEP
+;  V31 tmp24        [V31,T10] (  2,  4   )     ref  ->  rsi         single-def "argument with side effect"
+;  V32 tmp25        [V32,T08] (  3,  6   )  struct ( 8) [rbp-0x30]  do-not-enreg[SF] "by-value struct argument" <System.Nullable`1[int]>
+;  V33 rat0         [V33    ] (  1,  1   )    long  ->  [rbp-0x50]  do-not-enreg[V] "PSPSym"
 ;
 ; Lcl frame size = 56
 
 G_M11363_IG01:
        push     rbp
        push     r15
        push     r14
        push     r13
        push     r12
        push     rbx
        sub      rsp, 56
        lea      rbp, [rsp+0x60]
        mov      qword ptr [rbp-0x50], rsp
        mov      rbx, rdi
        mov      r14, rsi
        mov      r13, rdx
        mov      r12d, ecx
        mov      r15, r8
 						;; size=38 bbWeight=1 PerfScore 9.00
 G_M11363_IG02:
        test     rbx, rbx
        je       G_M11363_IG09
        cmp      dword ptr [rbx+0x08], 0
        je       G_M11363_IG09
        mov      rdi, r13
        mov      rsi, 0xD1FFAB1E      ; 'encoding'
        mov      rax, 0xD1FFAB1E      ; code for System.ArgumentNullException:ThrowIfNull(System.Object,System.String)
        call     [rax]System.ArgumentNullException:ThrowIfNull(System.Object,System.String)
        mov      rdi, r14
        mov      rsi, 0xD1FFAB1E      ; 'contents'
        mov      rax, 0xD1FFAB1E      ; code for System.ArgumentNullException:ThrowIfNull(System.Object,System.String)
        call     [rax]System.ArgumentNullException:ThrowIfNull(System.Object,System.String)
        test     r15, r15
        je       SHORT G_M11363_IG03
        cmp      dword ptr [r15+0x20], 0
        jne      G_M11363_IG07
 						;; size=85 bbWeight=1 PerfScore 18.00
 G_M11363_IG03:
        mov      eax, 6
        mov      edi, 2
        test     r12b, r12b
        mov      r12d, edi
        cmovne   r12d, eax
        mov      rdi, 0xD1FFAB1E      ; System.IO.FileStream
        call     CORINFO_HELP_NEWFAST
        mov      gword ptr [rbp-0x40], rax
        xor      edi, edi
        mov      qword ptr [rsp], rdi
        mov      rdi, rbx
        mov      esi, r12d
        mov      edx, 2
        mov      ecx, 1
        mov      r8d, 0x1000
        mov      r9d, 0xD1FFAB1E
        mov      r10, 0xD1FFAB1E      ; code for System.IO.Strategies.FileStreamHelpers:ValidateArguments(System.String,int,int,int,int,int,long)
        call     [r10]System.IO.Strategies.FileStreamHelpers:ValidateArguments(System.String,int,int,int,int,int,long)
        mov      rdi, 0xD1FFAB1E      ; System.IO.Strategies.UnixFileStreamStrategy
        call     CORINFO_HELP_NEWSFAST
        mov      gword ptr [rbp-0x48], rax
        xor      esi, esi
        mov      qword ptr [rsp], rsi
        mov      byte  ptr [rbp-0x30], 0
 						;; size=115 bbWeight=1 PerfScore 14.00
 G_M11363_IG04:
        mov      dword ptr [rbp-0x2C], esi
        mov      rsi, qword ptr [rbp-0x30]
        mov      qword ptr [rsp+0x08], rsi
        mov      rsi, rbx
        mov      edx, r12d
        mov      rdi, rax
        mov      ecx, 2
        mov      r8d, 1
        mov      r9d, 0xD1FFAB1E
        mov      r10, 0xD1FFAB1E      ; code for System.IO.Strategies.OSFileStreamStrategy:.ctor(System.String,int,int,int,int,long,System.Nullable`1[int]):this
        call     [r10]System.IO.Strategies.OSFileStreamStrategy:.ctor(System.String,int,int,int,int,long,System.Nullable`1[int]):this
        mov      rdi, 0xD1FFAB1E      ; System.IO.Strategies.BufferedFileStreamStrategy
        call     CORINFO_HELP_NEWSFAST
        mov      rbx, rax
        lea      rdi, bword ptr [rbx+0x18]
        mov      rsi, gword ptr [rbp-0x48]
        call     CORINFO_HELP_ASSIGN_REF
        mov      dword ptr [rbx+0x28], 0x1000
-       mov      rdi, gword ptr [rbp-0x40]
        mov      rsi, rbx
-       mov      rax, 0xD1FFAB1E      ; code for System.IO.Strategies.FileStreamHelpers:WrapIfDerivedType(System.IO.FileStream,System.IO.Strategies.FileStreamStrategy):System.IO.Strategies.FileStreamStrategy
-       call     [rax]System.IO.Strategies.FileStreamHelpers:WrapIfDerivedType(System.IO.FileStream,System.IO.Strategies.FileStreamStrategy):System.IO.Strategies.FileStreamStrategy
        mov      rbx, gword ptr [rbp-0x40]
        lea      rdi, bword ptr [rbx+0x10]
-       mov      rsi, rax
        call     CORINFO_HELP_ASSIGN_REF
        mov      rdi, 0xD1FFAB1E      ; System.IO.StreamWriter
        call     CORINFO_HELP_NEWSFAST
        mov      r12, rax
        mov      rdi, r12
        mov      rsi, rbx
        mov      rdx, r13
        mov      ecx, 0x400
        xor      r8d, r8d
        mov      rax, 0xD1FFAB1E      ; code for System.IO.StreamWriter:.ctor(System.IO.Stream,System.Text.Encoding,int,ubyte):this
        call     [rax]System.IO.StreamWriter:.ctor(System.IO.Stream,System.Text.Encoding,int,ubyte):this
        nop      
-						;; size=172 bbWeight=1 PerfScore 26.25
+						;; size=153 bbWeight=1 PerfScore 21.75
 G_M11363_IG05:
        mov      rdi, r12
        mov      rsi, r14
        mov      rdx, r15
        mov      rax, 0xD1FFAB1E      ; code for System.IO.File:InternalWriteAllLinesAsync(System.IO.StreamWriter,System.Collections.Generic.IEnumerable`1[System.String],System.Threading.CancellationToken):System.Threading.Tasks.Task
 						;; size=19 bbWeight=1 PerfScore 1.00
 G_M11363_IG06:
        add      rsp, 56
        pop      rbx
        pop      r12
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        tail.jmp [rax]System.IO.File:InternalWriteAllLinesAsync(System.IO.StreamWriter,System.Collections.Generic.IEnumerable`1[System.String],System.Threading.CancellationToken):System.Threading.Tasks.Task
 						;; size=17 bbWeight=1 PerfScore 5.25
 G_M11363_IG07:
        mov      rdi, r15
        mov      rax, 0xD1FFAB1E      ; code for System.Threading.Tasks.Task:FromCanceled(System.Threading.CancellationToken):System.Threading.Tasks.Task
 						;; size=13 bbWeight=1 PerfScore 0.50
 G_M11363_IG08:
        add      rsp, 56
        pop      rbx
        pop      r12
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        tail.jmp [rax]System.Threading.Tasks.Task:FromCanceled(System.Threading.CancellationToken):System.Threading.Tasks.Task
 						;; size=17 bbWeight=1 PerfScore 5.25
 G_M11363_IG09:
        mov      edi, 0x1A139
        mov      rsi, 0xD1FFAB1E
        call     CORINFO_HELP_STRCNS
        mov      rsi, rax
        mov      rdi, rbx
        mov      rax, 0xD1FFAB1E      ; code for System.ArgumentException:ThrowNullOrEmptyException(System.String,System.String)
        call     [rax]System.ArgumentException:ThrowNullOrEmptyException(System.String,System.String)
        int3     
 						;; size=39 bbWeight=1 PerfScore 5.50
 G_M11363_IG10:
        mov      rax, gword ptr [rbp-0x38]
 						;; size=4 bbWeight=0 PerfScore 0.00
 G_M11363_IG11:
        add      rsp, 56
        pop      rbx
        pop      r12
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        ret      
 						;; size=15 bbWeight=0 PerfScore 0.00
 G_M11363_IG12:
        push     rbp
        push     r15
        push     r14
        push     r13
        push     r12
        push     rbx
        sub      rsp, 24
        mov      rbp, qword ptr [rdi+0x10]
        mov      qword ptr [rsp+0x10], rbp
        lea      rbp, [rbp+0x60]
 						;; size=27 bbWeight=0 PerfScore 0.00
 G_M11363_IG13:
        mov      rdi, rsi
        mov      rax, 0xD1FFAB1E      ; code for System.Threading.Tasks.Task:FromException(System.Exception):System.Threading.Tasks.Task
        call     [rax]System.Threading.Tasks.Task:FromException(System.Exception):System.Threading.Tasks.Task
        mov      gword ptr [rbp-0x38], rax
        lea      rax, G_M11363_IG10
 						;; size=26 bbWeight=0 PerfScore 0.00
 G_M11363_IG14:
        add      rsp, 24
        pop      rbx
        pop      r12
        pop      r13
        pop      r14
        pop      r15
        pop      rbp
        ret      
 						;; size=15 bbWeight=0 PerfScore 0.00
 
-; Total bytes of code 602, prolog size 38, PerfScore 84.75, instruction count 153, allocated bytes for code 602 (MethodHash=ba25d39c) for method System.IO.File:WriteAllLinesAsync(System.String,System.Collections.Generic.IEnumerable`1[System.String],System.Text.Encoding,ubyte,System.Threading.CancellationToken):System.Threading.Tasks.Task (FullOpts)
+; Total bytes of code 583, prolog size 38, PerfScore 80.25, instruction count 149, allocated bytes for code 583 (MethodHash=ba25d39c) for method System.IO.File:WriteAllLinesAsync(System.String,System.Collections.Generic.IEnumerable`1[System.String],System.Text.Encoding,ubyte,System.Threading.CancellationToken):System.Threading.Tasks.Task (FullOpts)
 ; ============================================================

Larger list of diffs: https://gist.github.com/MihuBot/1674fcd3253ccef9fa1b24e541a0ab1d

[MihuBot]

@hez2010