1*9880d681SAndroid Build Coastguard Worker; RUN: llc < %s -mtriple=i386-apple-darwin -mcpu=corei7 | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker; rdar://r7512579 3*9880d681SAndroid Build Coastguard Worker 4*9880d681SAndroid Build Coastguard Worker; PHI defs in the atomic loop should be used by the add / adc 5*9880d681SAndroid Build Coastguard Worker; instructions. They should not be dead. 6*9880d681SAndroid Build Coastguard Worker 7*9880d681SAndroid Build Coastguard Workerdefine void @t(i64* nocapture %p) nounwind ssp { 8*9880d681SAndroid Build Coastguard Workerentry: 9*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: t: 10*9880d681SAndroid Build Coastguard Worker; CHECK: movl ([[REG:%[a-z]+]]), %eax 11*9880d681SAndroid Build Coastguard Worker; CHECK: movl 4([[REG]]), %edx 12*9880d681SAndroid Build Coastguard Worker; CHECK: LBB0_1: 13*9880d681SAndroid Build Coastguard Worker; CHECK: movl %eax, %ebx 14*9880d681SAndroid Build Coastguard Worker; CHECK: addl $1, %ebx 15*9880d681SAndroid Build Coastguard Worker; CHECK: movl %edx, %ecx 16*9880d681SAndroid Build Coastguard Worker; CHECK: adcl $0, %ecx 17*9880d681SAndroid Build Coastguard Worker; CHECK: lock cmpxchg8b ([[REG]]) 18*9880d681SAndroid Build Coastguard Worker; CHECK-NEXT: jne 19*9880d681SAndroid Build Coastguard Worker %0 = atomicrmw add i64* %p, i64 1 seq_cst 20*9880d681SAndroid Build Coastguard Worker ret void 21*9880d681SAndroid Build Coastguard Worker} 22