| Piotr Padlewski | c77ab8e | 2018-05-03 11:03:53 +0000 | [diff] [blame^] | 1 | ; RUN: opt < %s -basicaa -dse -S | FileCheck %s |
| 2 | |
| 3 | ; CHECK-LABEL: void @skipBarrier(i8* %ptr) |
| 4 | define void @skipBarrier(i8* %ptr) { |
| 5 | ; CHECK-NOT: store i8 42 |
| 6 | store i8 42, i8* %ptr |
| 7 | ; CHECK: %ptr2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr) |
| 8 | %ptr2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr) |
| 9 | ; CHECK: store i8 43 |
| 10 | store i8 43, i8* %ptr2 |
| 11 | ret void |
| 12 | } |
| 13 | |
| 14 | ; CHECK-LABEL: void @skip2Barriers(i8* %ptr) |
| 15 | define void @skip2Barriers(i8* %ptr) { |
| 16 | ; CHECK-NOT: store i8 42 |
| 17 | store i8 42, i8* %ptr |
| 18 | ; CHECK: %ptr2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr) |
| 19 | %ptr2 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr) |
| 20 | ; CHECK-NOT: store i8 43 |
| 21 | store i8 43, i8* %ptr2 |
| 22 | %ptr3 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr2) |
| 23 | %ptr4 = call i8* @llvm.launder.invariant.group.p0i8(i8* %ptr3) |
| 24 | |
| 25 | ; CHECK: store i8 44 |
| 26 | store i8 44, i8* %ptr4 |
| 27 | ret void |
| 28 | } |
| 29 | |
| 30 | declare i8* @llvm.launder.invariant.group.p0i8(i8*) |