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| author | Nadav Rotem <nrotem@apple.com> | 2013-05-01 19:18:51 +0000 |
|---|---|---|
| committer | Nadav Rotem <nrotem@apple.com> | 2013-05-01 19:18:51 +0000 |
| commit | b2ed5fac0693e949ffdbf45266f5d53839211b63 (patch) | |
| tree | d31cfa8184844a17fc9f9cebbe6e0da5410ce566 /test/CodeGen/ARM | |
| parent | a7eccdc59a15c272ed1b7c44924fa5bfe1ed1d9e (diff) | |
| download | llvm-b2ed5fac0693e949ffdbf45266f5d53839211b63.tar.gz llvm-b2ed5fac0693e949ffdbf45266f5d53839211b63.tar.bz2 llvm-b2ed5fac0693e949ffdbf45266f5d53839211b63.tar.xz | |
Optimize away nop CONCAT_VECTOR nodes.
Optimize CONCAT_VECTOR nodes that merge EXTRACT_SUBVECTOR values that extract from the same vector.
rdar://13402653
PR15866
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180871 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/ARM')
| -rw-r--r-- | test/CodeGen/ARM/nop_concat_vectors.ll | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/nop_concat_vectors.ll b/test/CodeGen/ARM/nop_concat_vectors.ll new file mode 100644 index 0000000000..c81090095a --- /dev/null +++ b/test/CodeGen/ARM/nop_concat_vectors.ll @@ -0,0 +1,13 @@ +; RUN: llc < %s -mtriple=armv7-apple-darwin | FileCheck %s + +;CHECK: _foo +;CHECK-NOT: vld1.32 +;CHECK-NOT: vst1.32 +;CHECK: bx +define void @foo(<16 x i8>* %J) { + %A = load <16 x i8>* %J + %T1 = shufflevector <16 x i8> %A, <16 x i8> undef, <8 x i32> <i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15> + %T2 = shufflevector <8 x i8> %T1, <8 x i8> undef, <16 x i32> <i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7> + store <16 x i8> %T2, <16 x i8>* %J + ret void +} |