diff options
| author | Michael Liao <michael.liao@intel.com> | 2012-10-17 20:48:33 +0000 |
|---|---|---|
| committer | Michael Liao <michael.liao@intel.com> | 2012-10-17 20:48:33 +0000 |
| commit | 13429e224cb165dae658ae4ea3ef67d69c1860fa (patch) | |
| tree | 164e93d1a25c9e48fef4c1aac0360e18bb0fe9f7 /test/CodeGen/X86 | |
| parent | 4b1aa961fdbb75035a963f8c6a01c8c5f1dc3f16 (diff) | |
Teach DAG combine to fold (extract_subvec (concat v1, ..) i) to v_i
- If the extracted vector has the same type of all vectored being concatenated
together, it should be simplified directly into v_i, where i is the index of
the element being extracted.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166125 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86')
| -rw-r--r-- | test/CodeGen/X86/extract-concat.ll | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/test/CodeGen/X86/extract-concat.ll b/test/CodeGen/X86/extract-concat.ll new file mode 100644 index 0000000000..5c8d20a651 --- /dev/null +++ b/test/CodeGen/X86/extract-concat.ll @@ -0,0 +1,17 @@ +; RUN: llc < %s -mcpu=corei7 -mtriple=x86_64-unknown-linux-gnu | FileCheck %s + +define void @foo(<4 x float> %in, <4 x i8>* %out) { + %t0 = fptoui <4 x float> %in to <4 x i32> + %t1 = trunc <4 x i32> %t0 to <4 x i16> + %t2 = shufflevector <4 x i16> %t1, <4 x i16> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7> + %t3 = trunc <8 x i16> %t2 to <8 x i8> + %t4 = shufflevector <8 x i8> %t3, <8 x i8> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3> + %t5 = insertelement <4 x i8> %t4, i8 -1, i32 3 + store <4 x i8> %t5, <4 x i8>* %out + ret void +; CHECK: foo +; CHECK: cvttps2dq +; CHECK-NOT: pextrd +; CHECK: pshufb +; CHECK: ret +} |