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| author | Nadav Rotem <nrotem@apple.com> | 2012-12-07 19:01:13 +0000 |
|---|---|---|
| committer | Nadav Rotem <nrotem@apple.com> | 2012-12-07 19:01:13 +0000 |
| commit | e4ccfef809a1a47f1386bb2767b8c77e64644435 (patch) | |
| tree | 7263b6bbf64a58b191abd551ff729246e1320d79 /lib/Target/X86/X86ISelLowering.cpp | |
| parent | 8ddc5a192935728c15602a4c15501e35f116422d (diff) | |
| download | llvm-e4ccfef809a1a47f1386bb2767b8c77e64644435.tar.gz llvm-e4ccfef809a1a47f1386bb2767b8c77e64644435.tar.bz2 llvm-e4ccfef809a1a47f1386bb2767b8c77e64644435.tar.xz | |
X86: Prefer using VPSHUFD over VPERMIL because it has better throughput.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169624 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index e59f619370..d48d722fab 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -6781,12 +6781,13 @@ X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const { unsigned TargetMask = getShuffleSHUFImmediate(SVOp); - if (HasFp256 && (VT == MVT::v4f32 || VT == MVT::v2f64)) - return getTargetShuffleNode(X86ISD::VPERMILP, dl, VT, V1, TargetMask, DAG); - if (HasSSE2 && (VT == MVT::v4f32 || VT == MVT::v4i32)) return getTargetShuffleNode(X86ISD::PSHUFD, dl, VT, V1, TargetMask, DAG); + if (HasFp256 && (VT == MVT::v4f32 || VT == MVT::v2f64)) + return getTargetShuffleNode(X86ISD::VPERMILP, dl, VT, V1, TargetMask, + DAG); + return getTargetShuffleNode(X86ISD::SHUFP, dl, VT, V1, V1, TargetMask, DAG); } |