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| author | Eli Friedman <eli.friedman@gmail.com> | 2008-06-13 22:02:12 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2008-06-13 22:02:12 +0000 |
| commit | 6903a24f32e11d10ad7232b2c16c8d07f27a31c7 (patch) | |
| tree | 25392f38f7effd961eacdff4946754d73a7cbac4 /test/Transforms/InstCombine | |
| parent | e562b1725ee068ff525082d1e9ba885c8928c72e (diff) | |
| download | llvm-6903a24f32e11d10ad7232b2c16c8d07f27a31c7.tar.gz llvm-6903a24f32e11d10ad7232b2c16c8d07f27a31c7.tar.bz2 llvm-6903a24f32e11d10ad7232b2c16c8d07f27a31c7.tar.xz | |
Don't skip over instructions other than loads that might read memory
when trying to sink stores.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52259 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/InstCombine')
| -rw-r--r-- | test/Transforms/InstCombine/2008-06-13-ReadOnlyCallStore.ll | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/2008-06-13-ReadOnlyCallStore.ll b/test/Transforms/InstCombine/2008-06-13-ReadOnlyCallStore.ll new file mode 100644 index 0000000000..3f23098225 --- /dev/null +++ b/test/Transforms/InstCombine/2008-06-13-ReadOnlyCallStore.ll @@ -0,0 +1,19 @@ +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {store i8} | count 2 + +define i32 @a(i8* %s) nounwind { +entry: + store i8 0, i8* %s, align 1 ; This store cannot be eliminated! + %tmp3 = call i32 @strlen( i8* %s ) nounwind readonly + %tmp5 = icmp ne i32 %tmp3, 0 + br i1 %tmp5, label %bb, label %bb8 + +bb: ; preds = %entry + store i8 0, i8* %s, align 1 + br label %bb8 + +bb8: + ret i32 %tmp3 +} + +declare i32 @strlen(i8*) nounwind readonly + |