1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-unknown- -mcpu=core2 | FileCheck %s --check-prefixes=CHECK
; Basic 128-bit cmpxchg
define void @t1(i128* nocapture %p) nounwind ssp {
; CHECK-LABEL: t1:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: pushq %rbx
; CHECK-NEXT: movl $1, %ebx
; CHECK-NEXT: xorl %eax, %eax
; CHECK-NEXT: xorl %edx, %edx
; CHECK-NEXT: xorl %ecx, %ecx
; CHECK-NEXT: lock cmpxchg16b (%rdi)
; CHECK-NEXT: popq %rbx
; CHECK-NEXT: retq
entry:
%r = cmpxchg i128* %p, i128 0, i128 1 seq_cst seq_cst
ret void
}
; FIXME: Handle 128-bit atomicrmw/load atomic/store atomic
|