diff options
| author | Owen Anderson <resistor@mac.com> | 2009-10-28 07:05:35 +0000 |
|---|---|---|
| committer | Owen Anderson <resistor@mac.com> | 2009-10-28 07:05:35 +0000 |
| commit | b62f792e78df12a43029352eb4c7cde9d456c67e (patch) | |
| tree | e2b4de6c1ad567c76b6038fe67a424b787a509f1 /test/Transforms/DeadStoreElimination | |
| parent | 40cc524edee857eab238338200d2cc80f840f52f (diff) | |
Treat lifetime begin/end markers as allocations/frees respectively for the
purposes for GVN/DSE.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85383 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/DeadStoreElimination')
| -rw-r--r-- | test/Transforms/DeadStoreElimination/lifetime-simple.ll | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/test/Transforms/DeadStoreElimination/lifetime-simple.ll b/test/Transforms/DeadStoreElimination/lifetime-simple.ll new file mode 100644 index 0000000000..430e700635 --- /dev/null +++ b/test/Transforms/DeadStoreElimination/lifetime-simple.ll @@ -0,0 +1,18 @@ +; RUN: opt < %s -dse -S | FileCheck %s + +target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" +target triple = "i386-apple-darwin7" + +define i8 @test2(i8* %P) nounwind { +; CHECK: @test2 +; CHECK-NOT: store i8 1 +; CHECK: ret i8 0 +entry: + call void @llvm.lifetime.start(i64 32, i8* %P) + call void @llvm.lifetime.end(i64 32, i8* %P) + store i8 1, i8* %P + ret i8 0 +} + +declare {}* @llvm.lifetime.start(i64 %S, i8* nocapture %P) readonly +declare void @llvm.lifetime.end(i64 %S, i8* nocapture %P)
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