diff options
| 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 | 5de0a77a9bbd06d0b1ecb71429cb83822e93eabe (patch) | |
| tree | eba073a4d1ab2e35f8389204318e2d512b28f55c /llvm/test/Transforms/InstCombine/2008-06-13-ReadOnlyCallStore.ll | |
| parent | 9ad8c54aab51afec95ae4989e36850cddf40b606 (diff) | |
| download | bcm5719-llvm-5de0a77a9bbd06d0b1ecb71429cb83822e93eabe.tar.gz bcm5719-llvm-5de0a77a9bbd06d0b1ecb71429cb83822e93eabe.zip | |
Don't skip over instructions other than loads that might read memory
when trying to sink stores.
llvm-svn: 52259
Diffstat (limited to 'llvm/test/Transforms/InstCombine/2008-06-13-ReadOnlyCallStore.ll')
| -rw-r--r-- | llvm/test/Transforms/InstCombine/2008-06-13-ReadOnlyCallStore.ll | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/2008-06-13-ReadOnlyCallStore.ll b/llvm/test/Transforms/InstCombine/2008-06-13-ReadOnlyCallStore.ll new file mode 100644 index 00000000000..3f23098225e --- /dev/null +++ b/llvm/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 + |
