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Add support for generating CMPXCHG16B on x86-64 for the cmpxchg IR instruction.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138660 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Friedman
2011-08-26 21:21:21 +00:00
parent 51fb91c04c
commit 43f51aeca8
8 changed files with 107 additions and 48 deletions
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13
test/CodeGen/X86/cmpxchg16b.ll Normal file
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; RUN: llc < %s -march=x86-64 -mcpu=core2 | FileCheck %s
; Basic 128-bit cmpxchg
define void @t1(i128* nocapture %p) nounwind ssp {
entry:
; CHECK movl $1, %ebx
; CHECK: lock
; CHECK-NEXT: cmpxchg16b
%r = cmpxchg i128* %p, i128 0, i128 1 seq_cst
ret void
}
; FIXME: Handle 128-bit atomicrmw/load atomic/store atomic