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| author | Mon P Wang <wangmp@apple.com> | 2009-01-26 04:39:00 +0000 |
|---|---|---|
| committer | Mon P Wang <wangmp@apple.com> | 2009-01-26 04:39:00 +0000 |
| commit | fe6d2cd9d169894b0263df8c5f26df663f4f0ea8 (patch) | |
| tree | 63e6d9cd531bc06aee57f5e3c468529c55b63a8f /test | |
| parent | e7852d014432a06c783de3c350eb96e686f10f92 (diff) | |
| download | external_llvm-fe6d2cd9d169894b0263df8c5f26df663f4f0ea8.zip external_llvm-fe6d2cd9d169894b0263df8c5f26df663f4f0ea8.tar.gz external_llvm-fe6d2cd9d169894b0263df8c5f26df663f4f0ea8.tar.bz2 | |
Fixed optimization of combining two shuffles where the first shuffle inputs
has a different number of elements than the output.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62998 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/InstCombine/vec_shuffle2.ll | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/vec_shuffle2.ll b/test/Transforms/InstCombine/vec_shuffle2.ll new file mode 100644 index 0000000..3bd8924 --- /dev/null +++ b/test/Transforms/InstCombine/vec_shuffle2.ll @@ -0,0 +1,19 @@ +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep undef | count 1 +; END. + +; Test fold of two shuffles where the first shuffle vectors inputs are a +; different length then the second. + +define void @test_cl(<4 x i8> addrspace(1)* %dest, <16 x i8> addrspace(1)* %old) nounwind { +entry: + %arrayidx = getelementptr <4 x i8> addrspace(1)* %dest, i32 0 ; <<4 x i8> addrspace(1)*> [#uses=1] + %arrayidx5 = getelementptr <16 x i8> addrspace(1)* %old, i32 0 ; <<16 x i8> addrspace(1)*> [#uses=1] + %tmp6 = load <16 x i8> addrspace(1)* %arrayidx5 ; <<16 x i8>> [#uses=1] + %tmp7 = shufflevector <16 x i8> %tmp6, <16 x i8> undef, <4 x i32> < i32 13, i32 9, i32 4, i32 13 > ; <<4 x i8>> [#uses=1] + %tmp9 = shufflevector <4 x i8> %tmp7, <4 x i8> undef, <4 x i32> < i32 3, i32 1, i32 2, i32 0 > ; <<4 x i8>> [#uses=1] + store <4 x i8> %tmp9, <4 x i8> addrspace(1)* %arrayidx + ret void + +return: ; preds = %entry + ret void +}
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