| ; 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: lock orl $0, -{{[0-9]+}}(%rsp) | |
| ; CHECK-NEXT: lock decl -{{[0-9]+}}(%rsp) | |
| ; CHECK-NEXT: lock orl $0, -{{[0-9]+}}(%rsp) | |
| ; CHECK-NEXT: xorl %eax, %eax | |
| ; CHECK-NEXT: retq | |
| %i = alloca i32, align 4 | |
| store i32 1, ptr %i, align 4 | |
| fence seq_cst | |
| %t0 = atomicrmw sub ptr %i, i32 1 monotonic | |
| fence seq_cst | |
| ret i32 0 | |
| } |