| Evan Cheng | 306b4ca | 2010-01-08 23:41:50 +0000 | [diff] [blame^] | 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: LBB1_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 | tail call void @llvm.memory.barrier(i1 true, i1 true, i1 true, i1 true, i1 true) |
| 22 | %0 = tail call i64 @llvm.atomic.load.add.i64.p0i64(i64* %p, i64 1) ; <i64> [#uses=0] |
| 23 | tail call void @llvm.memory.barrier(i1 true, i1 true, i1 true, i1 true, i1 true) |
| 24 | ret void |
| 25 | } |
| 26 | |
| 27 | declare void @llvm.memory.barrier(i1, i1, i1, i1, i1) nounwind |
| 28 | |
| 29 | declare i64 @llvm.atomic.load.add.i64.p0i64(i64* nocapture, i64) nounwind |