Benjamin Kramer
02c2ecf9f1
X86: Fold EXTRACT_SUBVECTORs of a BUILD_VECTOR into a smaller BUILD_VECTOR.
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That can usually be lowered efficiently and is common in sandybridge code.
It would be nice to do this in DAGCombiner but we can't insert arbitrary
BUILD_VECTORs this late.
Fixes PR15462.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176634 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-07 18:48:40 +00:00
Benjamin Kramer
a220aeb58f
X86: Open up some opportunities for constant folding by postponing shift lowering.
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Fixes PR15141.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174327 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-04 15:19:33 +00:00
Craig Topper
a124f94952
Make LowerSIGN_EXTEND_INREG split 256-bit vectors when AVX1 is enabled and use AVX2 shifts when AVX2 is enabled.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145022 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-21 01:12:36 +00:00
Craig Topper
7be5dfd1a1
Add more AVX2 shift lowering support. Move AVX2 variable shift to use patterns instead of custom lowering code.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144457 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-12 09:58:49 +00:00
Bruno Cardoso Lopes
0dd80b0d69
Fix PR10688. Add support for spliting 256-bit vector shifts when the
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shift amount is variable
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137885 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-17 22:12:20 +00:00
Bruno Cardoso Lopes
328a9d4a0f
Add support for several vector shifts operations while in AVX mode. Fix PR10581
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137067 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-08 21:31:08 +00:00
