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| author | Evan Cheng <evan.cheng@apple.com> | 2010-04-02 19:36:14 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2010-04-02 19:36:14 +0000 |
| commit | f28f8bc40eedc6304ab25dd8bed486fa08f51f70 (patch) | |
| tree | d99c6dd81a1c9d1342237e699bcb3a90e4321680 /test/CodeGen/X86/memset-3.ll | |
| parent | cf5862d8ac9562e633e6ef7cb55e67c2b7ca9c0a (diff) | |
| download | llvm-f28f8bc40eedc6304ab25dd8bed486fa08f51f70.tar.gz llvm-f28f8bc40eedc6304ab25dd8bed486fa08f51f70.tar.bz2 llvm-f28f8bc40eedc6304ab25dd8bed486fa08f51f70.tar.xz | |
Correctly lower memset / memcpy of undef. It should be a nop. PR6767.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100208 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/memset-3.ll')
| -rw-r--r-- | test/CodeGen/X86/memset-3.ll | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/test/CodeGen/X86/memset-3.ll b/test/CodeGen/X86/memset-3.ll new file mode 100644 index 0000000000..9b20ad506a --- /dev/null +++ b/test/CodeGen/X86/memset-3.ll @@ -0,0 +1,12 @@ +; RUN: llc -mtriple=i386-apple-darwin < %s | not grep memset +; PR6767 + +define void @t() nounwind ssp { +entry: + %buf = alloca [512 x i8], align 1 + %ptr = getelementptr inbounds [512 x i8]* %buf, i32 0, i32 0 + call void @llvm.memset.i32(i8* %ptr, i8 undef, i32 512, i32 1) + unreachable +} + +declare void @llvm.memset.i32(i8* nocapture, i8, i32, i32) nounwind |