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 7 define void @t(i64* nocapture %p) nounwind ssp { 8 entry: 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
