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| author | Owen Anderson <resistor@mac.com> | 2008-07-28 16:14:26 +0000 |
|---|---|---|
| committer | Owen Anderson <resistor@mac.com> | 2008-07-28 16:14:26 +0000 |
| commit | 8aa895b19a64796a4c1f7cd0cb0750ad34263ea0 (patch) | |
| tree | 73966641c6815ec06eb4828f602e77ccc8d8ed3a /test | |
| parent | d4310a5d41cc13f109890f5efbb19e084fecb27a (diff) | |
| download | llvm-8aa895b19a64796a4c1f7cd0cb0750ad34263ea0.tar.gz llvm-8aa895b19a64796a4c1f7cd0cb0750ad34263ea0.tar.bz2 llvm-8aa895b19a64796a4c1f7cd0cb0750ad34263ea0.tar.xz | |
Add support for eliminating stores that store the same value that was just loaded.
This fixes PR2599.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54133 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/DeadStoreElimination/2008-07-28-load-store.ll | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/test/Transforms/DeadStoreElimination/2008-07-28-load-store.ll b/test/Transforms/DeadStoreElimination/2008-07-28-load-store.ll new file mode 100644 index 0000000000..0ba8479a2c --- /dev/null +++ b/test/Transforms/DeadStoreElimination/2008-07-28-load-store.ll @@ -0,0 +1,14 @@ +; RUN: llvm-as < %s | opt -dse | llvm-dis | not grep tmp5 +; PR2599 + +define void @foo({ i32, i32 }* %x) nounwind { +entry: + %tmp4 = getelementptr { i32, i32 }* %x, i32 0, i32 0 ; <i32*> [#uses=2] + %tmp5 = load i32* %tmp4, align 4 ; <i32> [#uses=1] + %tmp7 = getelementptr { i32, i32 }* %x, i32 0, i32 1 ; <i32*> [#uses=2] + %tmp8 = load i32* %tmp7, align 4 ; <i32> [#uses=1] + %tmp17 = sub i32 0, %tmp8 ; <i32> [#uses=1] + store i32 %tmp5, i32* %tmp4, align 4 + store i32 %tmp17, i32* %tmp7, align 4 + ret void +} |