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| author | Chris Lattner <sabre@nondot.org> | 2009-03-04 19:20:50 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2009-03-04 19:20:50 +0000 |
| commit | 1541e0f7da2de6ae84434060df81e93b64000924 (patch) | |
| tree | 0d427acfb2eb2cb6e65190773d760b924519a84b /test/Transforms/ScalarRepl | |
| parent | 66941988de6a295649b33f4c2b0f36a094b2244d (diff) | |
| download | llvm-1541e0f7da2de6ae84434060df81e93b64000924.tar.gz llvm-1541e0f7da2de6ae84434060df81e93b64000924.tar.bz2 llvm-1541e0f7da2de6ae84434060df81e93b64000924.tar.xz | |
Fix PR3720 by properly propagating alignment information from memcpy/memmove
onto element accesses.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66053 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/ScalarRepl')
| -rw-r--r-- | test/Transforms/ScalarRepl/2009-03-04-MemCpyAlign.ll | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/test/Transforms/ScalarRepl/2009-03-04-MemCpyAlign.ll b/test/Transforms/ScalarRepl/2009-03-04-MemCpyAlign.ll new file mode 100644 index 0000000000..4fc491b297 --- /dev/null +++ b/test/Transforms/ScalarRepl/2009-03-04-MemCpyAlign.ll @@ -0,0 +1,19 @@ +; The store into %p should end up with a known alignment of 1, since the memcpy +; is only known to access it with 1-byte alignment. +; RUN: llvm-as < %s | opt -scalarrepl | llvm-dis | grep {store i16 1, .*, align 1} +; PR3720 + + %struct.st = type { i16 } + +define void @f(i8* %p) nounwind { +entry: + %s = alloca %struct.st, align 4 ; <%struct.st*> [#uses=2] + %0 = getelementptr %struct.st* %s, i32 0, i32 0 ; <i16*> [#uses=1] + store i16 1, i16* %0, align 4 + %s1 = bitcast %struct.st* %s to i8* ; <i8*> [#uses=1] + call void @llvm.memcpy.i32(i8* %p, i8* %s1, i32 2, i32 1) + ret void +} + +declare void @llvm.memcpy.i32(i8* nocapture, i8* nocapture, i32, i32) nounwind + |