Auto merge of #137651 - fmease:rollup-s3s7m6f, r=fmease

Rollup of 14 pull requests

Successful merges:

 - #136576 (pass optimization level to llvm-bitcode-linker)
 - #137154 (Add UTF-8 validation fast paths in `Wtf8Buf`)
 - #137311 (Enable `f16` for MIPS)
 - #137320 (fix(rustdoc): Fixed stability version in rustdoc)
 - #137529 (remove few unused args)
 - #137544 (tests: Add regression test for derive token invalidation (#81099))
 - #137559 (run some tests on emscripten again)
 - #137601 (ssa/mono: deduplicate `type_has_metadata`)
 - #137603 (codegen_llvm: avoid `Deref` impls w/ extern type)
 - #137604 (trait_sel: resolve vars in host effects)
 - #137609 (Complete the list of resources used in rustdoc output)
 - #137613 (hir_analysis: skip self type of host effect preds in variances_of)
 - #137614 (fix doc in library/core/src/pin.rs)
 - #137622 (fix attribute-related ICE when parsing macro on the rhs of a name-value attribute)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

compiler/rustc_attr_parsing/src/context.rs

@@ -333,7 +333,10 @@ impl<'sess> AttributeParser<'sess> {
                 {
                     lit
                 } else {
-                    let guar = self.dcx().has_errors().unwrap();
+                    let guar = self.dcx().span_delayed_bug(
+                        args.span().unwrap_or(DUMMY_SP),
+                        "expr in place where literal is expected (builtin attr parsing)",
+                    );
                     ast::MetaItemLit {
                         symbol: kw::Empty,
                         suffix: None,

compiler/rustc_attr_parsing/src/parser.rs

@@ -13,7 +13,7 @@ use rustc_ast_pretty::pprust;
 use rustc_errors::DiagCtxtHandle;
 use rustc_hir::{self as hir, AttrPath};
 use rustc_span::symbol::{Ident, kw};
-use rustc_span::{DUMMY_SP, ErrorGuaranteed, Span, Symbol};
+use rustc_span::{ErrorGuaranteed, Span, Symbol};
 
 pub struct SegmentIterator<'a> {
     offset: usize,
@@ -127,7 +127,7 @@ impl<'a> ArgParser<'a> {
             }
             AttrArgs::Eq { eq_span, expr } => Self::NameValue(NameValueParser {
                 eq_span: *eq_span,
-                value: expr_to_lit(dcx, &expr),
+                value: expr_to_lit(dcx, &expr, *eq_span),
                 value_span: expr.span,
             }),
         }
@@ -348,16 +348,19 @@ impl NameValueParser {
     }
 }
 
-fn expr_to_lit(dcx: DiagCtxtHandle<'_>, expr: &Expr) -> MetaItemLit {
+fn expr_to_lit(dcx: DiagCtxtHandle<'_>, expr: &Expr, span: Span) -> MetaItemLit {
     // In valid code the value always ends up as a single literal. Otherwise, a dummy
     // literal suffices because the error is handled elsewhere.
     if let ExprKind::Lit(token_lit) = expr.kind
         && let Ok(lit) = MetaItemLit::from_token_lit(token_lit, expr.span)
     {
         lit
     } else {
-        let guar = dcx.has_errors().unwrap();
-        MetaItemLit { symbol: kw::Empty, suffix: None, kind: LitKind::Err(guar), span: DUMMY_SP }
+        let guar = dcx.span_delayed_bug(
+            span,
+            "expr in place where literal is expected (builtin attr parsing)",
+        );
+        MetaItemLit { symbol: kw::Empty, suffix: None, kind: LitKind::Err(guar), span }
     }
 }
 

compiler/rustc_borrowck/src/lib.rs

@@ -648,7 +648,7 @@ impl<'a, 'tcx> ResultsVisitor<'a, 'tcx, Borrowck<'a, 'tcx>> for MirBorrowckCtxt<
             | StatementKind::StorageLive(..) => {}
             // This does not affect borrowck
             StatementKind::BackwardIncompatibleDropHint { place, reason: BackwardIncompatibleDropReason::Edition2024 } => {
-                self.check_backward_incompatible_drop(location, (**place, span), state);
+                self.check_backward_incompatible_drop(location, **place, state);
             }
             StatementKind::StorageDead(local) => {
                 self.access_place(
@@ -1174,7 +1174,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, '_, 'tcx> {
     fn check_backward_incompatible_drop(
         &mut self,
         location: Location,
-        (place, place_span): (Place<'tcx>, Span),
+        place: Place<'tcx>,
         state: &BorrowckDomain,
     ) {
         let tcx = self.infcx.tcx;

compiler/rustc_codegen_llvm/src/back/lto.rs

@@ -793,7 +793,9 @@ pub(crate) unsafe fn optimize_thin_module(
         {
             let _timer =
                 cgcx.prof.generic_activity_with_arg("LLVM_thin_lto_rename", thin_module.name());
-            unsafe { llvm::LLVMRustPrepareThinLTORename(thin_module.shared.data.0, llmod, target) };
+            unsafe {
+                llvm::LLVMRustPrepareThinLTORename(thin_module.shared.data.0, llmod, target.raw())
+            };
             save_temp_bitcode(cgcx, &module, "thin-lto-after-rename");
         }
 
@@ -823,7 +825,7 @@ pub(crate) unsafe fn optimize_thin_module(
             let _timer =
                 cgcx.prof.generic_activity_with_arg("LLVM_thin_lto_import", thin_module.name());
             if unsafe {
-                !llvm::LLVMRustPrepareThinLTOImport(thin_module.shared.data.0, llmod, target)
+                !llvm::LLVMRustPrepareThinLTOImport(thin_module.shared.data.0, llmod, target.raw())
             } {
                 return Err(write::llvm_err(dcx, LlvmError::PrepareThinLtoModule));
             }

compiler/rustc_codegen_llvm/src/back/owned_target_machine.rs

@@ -1,6 +1,5 @@
 use std::ffi::{CStr, c_char};
 use std::marker::PhantomData;
-use std::ops::Deref;
 use std::ptr::NonNull;
 
 use rustc_data_structures::small_c_str::SmallCStr;
@@ -80,12 +79,12 @@ impl OwnedTargetMachine {
             .map(|tm_unique| Self { tm_unique, phantom: PhantomData })
             .ok_or_else(|| LlvmError::CreateTargetMachine { triple: SmallCStr::from(triple) })
     }
-}
-
-impl Deref for OwnedTargetMachine {
-    type Target = llvm::TargetMachine;
 
-    fn deref(&self) -> &Self::Target {
+    /// Returns inner `llvm::TargetMachine` type.
+    ///
+    /// This could be a `Deref` implementation, but `llvm::TargetMachine` is an extern type and
+    /// `Deref::Target: ?Sized`.
+    pub fn raw(&self) -> &llvm::TargetMachine {
         // SAFETY: constructing ensures we have a valid pointer created by
         // llvm::LLVMRustCreateTargetMachine.
         unsafe { self.tm_unique.as_ref() }

compiler/rustc_codegen_llvm/src/back/write.rs

@@ -637,7 +637,7 @@ pub(crate) unsafe fn llvm_optimize(
     let result = unsafe {
         llvm::LLVMRustOptimize(
             module.module_llvm.llmod(),
-            &*module.module_llvm.tm,
+            &*module.module_llvm.tm.raw(),
             to_pass_builder_opt_level(opt_level),
             opt_stage,
             cgcx.opts.cg.linker_plugin_lto.enabled(),
@@ -875,7 +875,7 @@ pub(crate) unsafe fn codegen(
             };
             write_output_file(
                 dcx,
-                tm,
+                tm.raw(),
                 config.no_builtins,
                 llmod,
                 &path,
@@ -909,7 +909,7 @@ pub(crate) unsafe fn codegen(
 
                 write_output_file(
                     dcx,
-                    tm,
+                    tm.raw(),
                     config.no_builtins,
                     llmod,
                     &obj_out,

compiler/rustc_codegen_llvm/src/builder.rs

@@ -405,7 +405,7 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
 
         // Emit KCFI operand bundle
         let kcfi_bundle = self.kcfi_operand_bundle(fn_attrs, fn_abi, instance, llfn);
-        if let Some(kcfi_bundle) = kcfi_bundle.as_deref() {
+        if let Some(kcfi_bundle) = kcfi_bundle.as_ref().map(|b| b.raw()) {
             bundles.push(kcfi_bundle);
         }
 
@@ -1433,7 +1433,7 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
 
         // Emit KCFI operand bundle
         let kcfi_bundle = self.kcfi_operand_bundle(fn_attrs, fn_abi, instance, llfn);
-        if let Some(kcfi_bundle) = kcfi_bundle.as_deref() {
+        if let Some(kcfi_bundle) = kcfi_bundle.as_ref().map(|b| b.raw()) {
             bundles.push(kcfi_bundle);
         }
 
@@ -1782,7 +1782,7 @@ impl<'a, 'll, 'tcx> Builder<'a, 'll, 'tcx> {
 
         // Emit KCFI operand bundle
         let kcfi_bundle = self.kcfi_operand_bundle(fn_attrs, fn_abi, instance, llfn);
-        if let Some(kcfi_bundle) = kcfi_bundle.as_deref() {
+        if let Some(kcfi_bundle) = kcfi_bundle.as_ref().map(|b| b.raw()) {
             bundles.push(kcfi_bundle);
         }
 

compiler/rustc_codegen_llvm/src/common.rs

@@ -77,7 +77,7 @@ impl<'ll> Funclet<'ll> {
     }
 
     pub(crate) fn bundle(&self) -> &llvm::OperandBundle<'ll> {
-        &self.operand
+        self.operand.raw()
     }
 }
 

compiler/rustc_codegen_llvm/src/context.rs

@@ -205,7 +205,7 @@ pub(crate) unsafe fn create_module<'ll>(
     {
         let tm = crate::back::write::create_informational_target_machine(tcx.sess, false);
         unsafe {
-            llvm::LLVMRustSetDataLayoutFromTargetMachine(llmod, &tm);
+            llvm::LLVMRustSetDataLayoutFromTargetMachine(llmod, tm.raw());
         }
 
         let llvm_data_layout = unsafe { llvm::LLVMGetDataLayoutStr(llmod) };

compiler/rustc_codegen_llvm/src/llvm/mod.rs

@@ -1,7 +1,6 @@
 #![allow(non_snake_case)]
 
 use std::ffi::{CStr, CString};
-use std::ops::Deref;
 use std::ptr;
 use std::str::FromStr;
 use std::string::FromUtf8Error;
@@ -355,6 +354,16 @@ impl<'a> OperandBundleOwned<'a> {
         };
         OperandBundleOwned { raw: ptr::NonNull::new(raw).unwrap() }
     }
+
+    /// Returns inner `OperandBundle` type.
+    ///
+    /// This could be a `Deref` implementation, but `OperandBundle` contains an extern type and
+    /// `Deref::Target: ?Sized`.
+    pub(crate) fn raw(&self) -> &OperandBundle<'a> {
+        // SAFETY: The returned reference is opaque and can only used for FFI.
+        // It is valid for as long as `&self` is.
+        unsafe { self.raw.as_ref() }
+    }
 }
 
 impl Drop for OperandBundleOwned<'_> {
@@ -365,16 +374,6 @@ impl Drop for OperandBundleOwned<'_> {
     }
 }
 
-impl<'a> Deref for OperandBundleOwned<'a> {
-    type Target = OperandBundle<'a>;
-
-    fn deref(&self) -> &Self::Target {
-        // SAFETY: The returned reference is opaque and can only used for FFI.
-        // It is valid for as long as `&self` is.
-        unsafe { self.raw.as_ref() }
-    }
-}
-
 pub(crate) fn add_module_flag_u32(
     module: &Module,
     merge_behavior: ModuleFlagMergeBehavior,