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| author | Craig Topper <craig.topper@gmail.com> | 2012-04-17 05:54:54 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@gmail.com> | 2012-04-17 05:54:54 +0000 |
| commit | 354103d8ca2292cb75e8b33f5bf20dee67071879 (patch) | |
| tree | 2af2e3ef1ed91566817a4df802eec4c09bacd01a /llvm/lib/Target/X86/Utils | |
| parent | 26e74e50b60236d7e9b66e387719d549947f6951 (diff) | |
| download | bcm5719-llvm-354103d8ca2292cb75e8b33f5bf20dee67071879.tar.gz bcm5719-llvm-354103d8ca2292cb75e8b33f5bf20dee67071879.zip | |
Don't decode vperm2i128 or vperm2f128 into a shuffle if bit 3 or 7 of the immediate is set.
llvm-svn: 154907
Diffstat (limited to 'llvm/lib/Target/X86/Utils')
| -rw-r--r-- | llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp b/llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp index 32c722acc43..a802333002d 100644 --- a/llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp +++ b/llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp @@ -169,6 +169,9 @@ void DecodeUNPCKLMask(EVT VT, SmallVectorImpl<int> &ShuffleMask) { void DecodeVPERM2X128Mask(EVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask) { + if (Imm & 0x88) + return; // Not a shuffle + unsigned HalfSize = VT.getVectorNumElements()/2; unsigned FstHalfBegin = (Imm & 0x3) * HalfSize; unsigned SndHalfBegin = ((Imm >> 4) & 0x3) * HalfSize; |
