| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s -mtriple=i686-unknown- -mcpu=core2 | FileCheck %s --check-prefixes=CHECK,X86 |
| ; RUN: llc < %s -mtriple=x86_64-unknown- -mcpu=core2 | FileCheck %s --check-prefixes=CHECK,X64 |
| |
| ; Basic 64-bit cmpxchg |
| define void @t1(i64* nocapture %p) nounwind ssp { |
| ; X86-LABEL: t1: |
| ; X86: # %bb.0: # %entry |
| ; X86-NEXT: pushl %ebx |
| ; X86-NEXT: pushl %esi |
| ; X86-NEXT: movl {{[0-9]+}}(%esp), %esi |
| ; X86-NEXT: xorl %eax, %eax |
| ; X86-NEXT: xorl %edx, %edx |
| ; X86-NEXT: xorl %ecx, %ecx |
| ; X86-NEXT: movl $1, %ebx |
| ; X86-NEXT: lock cmpxchg8b (%esi) |
| ; X86-NEXT: popl %esi |
| ; X86-NEXT: popl %ebx |
| ; X86-NEXT: retl |
| ; |
| ; X64-LABEL: t1: |
| ; X64: # %bb.0: # %entry |
| ; X64-NEXT: movl $1, %ecx |
| ; X64-NEXT: xorl %eax, %eax |
| ; X64-NEXT: lock cmpxchgq %rcx, (%rdi) |
| ; X64-NEXT: retq |
| entry: |
| %r = cmpxchg i64* %p, i64 0, i64 1 seq_cst seq_cst |
| ret void |
| } |
| |
