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