From 3e69c13c301acee99c8bde7e692777bf856a6362 Mon Sep 17 00:00:00 2001 From: Nick Lewycky Date: Tue, 2 Aug 2011 21:19:27 +0000 Subject: Lifetime intrinsics on undef are dead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136722 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/Transforms/InstCombine/deadcode.ll | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) (limited to 'test') diff --git a/test/Transforms/InstCombine/deadcode.ll b/test/Transforms/InstCombine/deadcode.ll index 52af0ef..7c7f1ab 100644 --- a/test/Transforms/InstCombine/deadcode.ll +++ b/test/Transforms/InstCombine/deadcode.ll @@ -1,5 +1,5 @@ ; RUN: opt < %s -instcombine -S | grep {ret i32 %A} -; RUN: opt < %s -die -S | not grep call.*llvm.stacksave +; RUN: opt < %s -die -S | not grep call.*llvm define i32 @test(i32 %A) { %X = or i1 false, false @@ -22,3 +22,12 @@ define i32* @test2(i32 %width) { declare i8* @llvm.stacksave() +declare void @llvm.lifetime.start(i64, i8*) +declare void @llvm.lifetime.end(i64, i8*) + +define void @test3() { + call void @llvm.lifetime.start(i64 -1, i8* undef) + call void @llvm.lifetime.end(i64 -1, i8* undef) + ret void +} + -- cgit v1.1