| ; RUN: llc < %s -mtriple=i386-apple-darwin -mcpu=corei7 | FileCheck %s |
| ; rdar://r7512579 |
| |
| ; PHI defs in the atomic loop should be used by the add / adc |
| ; instructions. They should not be dead. |
| |
| define void @t(i64* nocapture %p) nounwind ssp { |
| entry: |
| ; CHECK: t: |
| ; CHECK: movl ([[REG:%[a-z]+]]), %eax |
| ; CHECK: movl 4([[REG]]), %edx |
| ; CHECK: LBB0_1: |
| ; CHECK: movl %eax, %ebx |
| ; CHECK: addl {{%[a-z]+}}, %ebx |
| ; CHECK: movl %edx, %ecx |
| ; CHECK: adcl {{%[a-z]+}}, %ecx |
| ; CHECK: lock |
| ; CHECK-NEXT: cmpxchg8b ([[REG]]) |
| ; CHECK-NEXT: jne |
| %0 = atomicrmw add i64* %p, i64 1 seq_cst |
| ret void |
| } |
