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| author | Chris Lattner <sabre@nondot.org> | 2007-09-07 05:33:03 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2007-09-07 05:33:03 +0000 |
| commit | 24905f7cfbf50deaa9dd7c94c5e02789b8afeaef (patch) | |
| tree | 3e1293daa2e5389cf2326bf0f0d47cc983d40cd8 /test/Transforms/InstCombine | |
| parent | 1636de94069d492185da2dd36859d4a1962a2eed (diff) | |
| download | external_llvm-24905f7cfbf50deaa9dd7c94c5e02789b8afeaef.zip external_llvm-24905f7cfbf50deaa9dd7c94c5e02789b8afeaef.tar.gz external_llvm-24905f7cfbf50deaa9dd7c94c5e02789b8afeaef.tar.bz2 | |
Don't zap back to back volatile load/stores
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41759 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/InstCombine')
| -rw-r--r-- | test/Transforms/InstCombine/volatile_store.ll | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/volatile_store.ll b/test/Transforms/InstCombine/volatile_store.ll new file mode 100644 index 0000000..09651ba --- /dev/null +++ b/test/Transforms/InstCombine/volatile_store.ll @@ -0,0 +1,14 @@ +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {volatile store} +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {volatile load} + +@x = weak global i32 0 ; <i32*> [#uses=2] + +define void @self_assign_1() { +entry: + %tmp = volatile load i32* @x ; <i32> [#uses=1] + volatile store i32 %tmp, i32* @x + br label %return + +return: ; preds = %entry + ret void +} |