derek.holloway
7502bf64a4
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57 lines
1.8 KiB
LLVM
57 lines
1.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=i686-unknown- -mcpu=core2 | FileCheck %s --check-prefix=X86
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; RUN: llc < %s -mtriple=x86_64-unknown- -mcpu=core2 | FileCheck %s --check-prefix=X64
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; RUN: llc < %s -mtriple=i686-unknown- -mcpu=i486 | FileCheck %s --check-prefix=I486
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; RUN: llc < %s -mtriple=i686-unknown- -mcpu=znver1 | FileCheck %s --check-prefix=X86
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; RUN: llc < %s -mtriple=i686-unknown- -mcpu=lakemont | FileCheck %s --check-prefix=X86
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; Basic 64-bit cmpxchg
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define void @t1(ptr nocapture %p) nounwind ssp {
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; X86-LABEL: t1:
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; X86: # %bb.0: # %entry
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; X86-NEXT: pushl %ebx
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; X86-NEXT: pushl %esi
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; X86-NEXT: movl {{[0-9]+}}(%esp), %esi
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; X86-NEXT: xorl %eax, %eax
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; X86-NEXT: xorl %edx, %edx
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; X86-NEXT: xorl %ecx, %ecx
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; X86-NEXT: movl $1, %ebx
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; X86-NEXT: lock cmpxchg8b (%esi)
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; X86-NEXT: popl %esi
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; X86-NEXT: popl %ebx
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; X86-NEXT: retl
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;
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; X64-LABEL: t1:
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; X64: # %bb.0: # %entry
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; X64-NEXT: movl $1, %ecx
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; X64-NEXT: xorl %eax, %eax
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; X64-NEXT: lock cmpxchgq %rcx, (%rdi)
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; X64-NEXT: retq
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;
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; I486-LABEL: t1:
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; I486: # %bb.0: # %entry
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; I486-NEXT: pushl %ebp
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; I486-NEXT: movl %esp, %ebp
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; I486-NEXT: andl $-8, %esp
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; I486-NEXT: subl $8, %esp
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; I486-NEXT: movl 8(%ebp), %eax
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; I486-NEXT: movl $0, {{[0-9]+}}(%esp)
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; I486-NEXT: movl $0, (%esp)
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; I486-NEXT: movl %esp, %ecx
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; I486-NEXT: pushl $5
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; I486-NEXT: pushl $5
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; I486-NEXT: pushl $0
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; I486-NEXT: pushl $1
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; I486-NEXT: pushl %ecx
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; I486-NEXT: pushl %eax
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; I486-NEXT: calll __atomic_compare_exchange_8@PLT
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; I486-NEXT: addl $24, %esp
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; I486-NEXT: movl %ebp, %esp
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; I486-NEXT: popl %ebp
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; I486-NEXT: retl
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entry:
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%r = cmpxchg ptr %p, i64 0, i64 1 seq_cst seq_cst
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ret void
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}
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