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| author | Bruno Cardoso Lopes <bruno.cardoso@gmail.com> | 2011-09-20 23:19:33 +0000 |
|---|---|---|
| committer | Bruno Cardoso Lopes <bruno.cardoso@gmail.com> | 2011-09-20 23:19:33 +0000 |
| commit | e97190fdf875843e8161a942f2046fd3ef81330f (patch) | |
| tree | fc3792590e1a95f702644dfb6cefd549bde4f319 /test/CodeGen | |
| parent | f4b841d4e2754861adade83ece637f84aed031da (diff) | |
| download | llvm-e97190fdf875843e8161a942f2046fd3ef81330f.tar.gz llvm-e97190fdf875843e8161a942f2046fd3ef81330f.tar.bz2 llvm-e97190fdf875843e8161a942f2046fd3ef81330f.tar.xz | |
Add a DAGCombine for subvector extracts to remove useless chains of
subvector inserts and extracts. Initial patch by Rackover, Zvi with
some tweak done by me.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140204 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen')
| -rw-r--r-- | test/CodeGen/X86/avx-vinsertf128.ll | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/test/CodeGen/X86/avx-vinsertf128.ll b/test/CodeGen/X86/avx-vinsertf128.ll index 2b2f7e5411..cda1331da3 100644 --- a/test/CodeGen/X86/avx-vinsertf128.ll +++ b/test/CodeGen/X86/avx-vinsertf128.ll @@ -37,3 +37,22 @@ allocas: ret void } +;; DAG Combine must remove useless vinsertf128 instructions + +; CHECK: DAGCombineA +; CHECK-NOT: vinsertf128 $1 +define <4 x i32> @DAGCombineA(<4 x i32> %v1) nounwind readonly { + %1 = shufflevector <4 x i32> %v1, <4 x i32> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7> + %2 = shufflevector <8 x i32> %1, <8 x i32> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3> + ret <4 x i32> %2 +} + +; CHECK: DAGCombineB +; CHECK: vpaddd %xmm +; CHECK-NOT: vinsertf128 $1 +; CHECK: vpaddd %xmm +define <8 x i32> @DAGCombineB(<8 x i32> %v1, <8 x i32> %v2) nounwind readonly { + %1 = add <8 x i32> %v1, %v2 + %2 = add <8 x i32> %1, %v1 + ret <8 x i32> %2 +} |