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[LLVM] [X86] Fix integer overflows in frame layout for huge frames (l…
…lvm#101840) Fix 32-bit integer overflows in the X86 target frame layout when dealing with frames larger than 4gb. When this occurs, we'll scavenge a scratch register to be able to hold the correct stack offset for frame locals. This completes reapplying llvm#84114. Fixes llvm#48911 Fixes llvm#75944 Fixes llvm#87154
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --no_x86_scrub_sp --version 4 | ||
; RUN: llc -O0 -mtriple=x86_64 -mattr=+avx512f -verify-machineinstrs < %s | FileCheck %s --check-prefix=CHECK | ||
define void @f(i16 %LGV2, i1 %LGV3) { | ||
; CHECK-LABEL: f: | ||
; CHECK: # %bb.0: # %BB | ||
; CHECK-NEXT: subq $2147483528, %rsp # imm = 0x7FFFFF88 | ||
; CHECK-NEXT: .cfi_def_cfa_offset 2147483536 | ||
; CHECK-NEXT: movb %sil, %cl | ||
; CHECK-NEXT: movw %di, %ax | ||
; CHECK-NEXT: movswq %ax, %rax | ||
; CHECK-NEXT: andb $1, %cl | ||
; CHECK-NEXT: movabsq $-2147483768, %rdx # imm = 0xFFFFFFFF7FFFFF88 | ||
; CHECK-NEXT: movb %cl, (%rsp,%rdx) | ||
; CHECK-NEXT: addq $2147483528, %rsp # imm = 0x7FFFFF88 | ||
; CHECK-NEXT: .cfi_def_cfa_offset 8 | ||
; CHECK-NEXT: retq | ||
BB: | ||
%A = alloca i1, i33 2147483648, align 1 | ||
%G = getelementptr i1, ptr %A, i16 %LGV2 | ||
%G4 = getelementptr i1, ptr %G, i32 -2147483648 | ||
store i1 %LGV3, ptr %G4, align 1 | ||
ret void | ||
} |
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