1; RUN: llc < %s -mtriple=i386-apple-darwin | 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: t: 10; CHECK: movl $1 11; CHECK: movl (%ebp), %eax 12; CHECK: movl 4(%ebp), %edx 13; CHECK: LBB0_1: 14; CHECK-NOT: movl $1 15; CHECK-NOT: movl $0 16; CHECK: addl 17; CHECK: adcl 18; CHECK: lock 19; CHECK: cmpxchg8b 20; CHECK: jne 21 %0 = atomicrmw add i64* %p, i64 1 seq_cst 22 ret void 23} 24