| ; 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 |
| } |
