| Rafael Espindola | b10a0f2 | 2011-06-30 20:14:24 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -simplifycfg -S | FileCheck %s |
| 2 | |
| Rafael Espindola | d07cf40 | 2014-07-30 21:04:00 +0000 | [diff] [blame] | 3 | ; Test that a lifetime intrinsic isn't removed because that would change semantics |
| Rafael Espindola | b10a0f2 | 2011-06-30 20:14:24 +0000 | [diff] [blame] | 4 | |
| 5 | ; CHECK: foo |
| 6 | ; CHECK: entry: |
| Rafael Espindola | d07cf40 | 2014-07-30 21:04:00 +0000 | [diff] [blame] | 7 | ; CHECK: bb0: |
| 8 | ; CHECK: bb1: |
| Rafael Espindola | b10a0f2 | 2011-06-30 20:14:24 +0000 | [diff] [blame] | 9 | ; CHECK: ret |
| 10 | define void @foo(i1 %x) { |
| 11 | entry: |
| 12 | %a = alloca i8 |
| 13 | call void @llvm.lifetime.start(i64 -1, i8* %a) nounwind |
| 14 | br i1 %x, label %bb0, label %bb1 |
| 15 | |
| 16 | bb0: |
| 17 | call void @llvm.lifetime.end(i64 -1, i8* %a) nounwind |
| 18 | br label %bb1 |
| 19 | |
| 20 | bb1: |
| 21 | call void @f() |
| 22 | ret void |
| 23 | } |
| 24 | |
| 25 | declare void @f() |
| 26 | |
| 27 | declare void @llvm.lifetime.start(i64, i8* nocapture) nounwind |
| 28 | |
| 29 | declare void @llvm.lifetime.end(i64, i8* nocapture) nounwind |