1; RUN: llc < %s -mtriple=i386-apple-darwin -mcpu=corei7 | FileCheck %s 2; rdar://r7512579 3 4; PHI defs in the atomic loop should be used by the add / adc 5; instructions. They should not be dead. 6 7define void @t(i64* nocapture %p) nounwind ssp { 8entry: 9; CHECK-LABEL: t: 10; CHECK: movl ([[REG:%[a-z]+]]), %eax 11; CHECK: movl 4([[REG]]), %edx 12; CHECK: LBB0_1: 13; CHECK: movl %eax, %ebx 14; CHECK: addl $1, %ebx 15; CHECK: movl %edx, %ecx 16; CHECK: adcl $0, %ecx 17; CHECK: lock cmpxchg8b ([[REG]]) 18; CHECK-NEXT: jne 19 %0 = atomicrmw add i64* %p, i64 1 seq_cst 20 ret void 21} 22