21 lines
557 B
LLVM
21 lines
557 B
LLVM
|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
||
|
|
; RUN: llc < %s -mtriple=x86_64-- -mattr=-sse -O0 | FileCheck %s
|
||
|
|
; PR9675
|
||
|
|
|
||
|
|
define i32 @t() {
|
||
|
|
; CHECK-LABEL: t:
|
||
|
|
; CHECK: # %bb.0:
|
||
|
|
; CHECK-NEXT: movl $1, -{{[0-9]+}}(%rsp)
|
||
|
|
; CHECK-NEXT: mfence
|
||
|
|
; CHECK-NEXT: lock decl -{{[0-9]+}}(%rsp)
|
||
|
|
; CHECK-NEXT: mfence
|
||
|
|
; CHECK-NEXT: xorl %eax, %eax
|
||
|
|
; CHECK-NEXT: retq
|
||
|
|
%i = alloca i32, align 4
|
||
|
|
store i32 1, i32* %i, align 4
|
||
|
|
fence seq_cst
|
||
|
|
%t0 = atomicrmw sub i32* %i, i32 1 monotonic
|
||
|
|
fence seq_cst
|
||
|
|
ret i32 0
|
||
|
|
}
|