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Diffstat (limited to 'test/Transforms/SimplifyCFG/lifetime.ll')
| -rw-r--r-- | test/Transforms/SimplifyCFG/lifetime.ll | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/test/Transforms/SimplifyCFG/lifetime.ll b/test/Transforms/SimplifyCFG/lifetime.ll new file mode 100644 index 0000000..b794221 --- /dev/null +++ b/test/Transforms/SimplifyCFG/lifetime.ll @@ -0,0 +1,29 @@ +; RUN: opt < %s -simplifycfg -S | FileCheck %s + +; Test that a lifetime intrinsic doesn't prevent us from simplifying this. + +; CHECK: foo +; CHECK: entry: +; CHECK-NOT: bb0: +; CHECK-NOT: bb1: +; CHECK: ret +define void @foo(i1 %x) { +entry: + %a = alloca i8 + call void @llvm.lifetime.start(i64 -1, i8* %a) nounwind + br i1 %x, label %bb0, label %bb1 + +bb0: + call void @llvm.lifetime.end(i64 -1, i8* %a) nounwind + br label %bb1 + +bb1: + call void @f() + ret void +} + +declare void @f() + +declare void @llvm.lifetime.start(i64, i8* nocapture) nounwind + +declare void @llvm.lifetime.end(i64, i8* nocapture) nounwind |
