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| author | Bruno Cardoso Lopes <bruno.cardoso@gmail.com> | 2011-07-29 01:31:04 +0000 |
|---|---|---|
| committer | Bruno Cardoso Lopes <bruno.cardoso@gmail.com> | 2011-07-29 01:31:04 +0000 |
| commit | 377baa5bc9901f705f7af97d0bee7a281e264eca (patch) | |
| tree | 5213b74cd5f2a005ebb25335fff03cb2706e0c90 | |
| parent | 0b0a09f4bff8de703f02edb218ee765f7c6831ce (diff) | |
Fix a bug while generating target specific VPERMIL masks: skip
undef mask elements. This fixes PR10529.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136450 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index f4b670be1c..7baa964240 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -3488,8 +3488,12 @@ static unsigned getShuffleVPERMILPSImmediate(SDNode *N) { int NumLanes = VT.getSizeInBits()/128; unsigned Mask = 0; - for (int i = 0; i < NumElts/NumLanes /* lane size */; ++i) - Mask |= SVOp->getMaskElt(i) << (i*2); + for (int i = 0; i < NumElts/NumLanes /* lane size */; ++i) { + int MaskElt = SVOp->getMaskElt(i); + if (MaskElt < 0) + continue; + Mask |= MaskElt << (i*2); + } return Mask; } @@ -3506,8 +3510,12 @@ static unsigned getShuffleVPERMILPDImmediate(SDNode *N) { unsigned Mask = 0; int LaneSize = NumElts/NumLanes; for (int l = 0; l < NumLanes; ++l) - for (int i = l*LaneSize; i < LaneSize*(l+1); ++i) - Mask |= (SVOp->getMaskElt(i)-l*LaneSize) << i; + for (int i = l*LaneSize; i < LaneSize*(l+1); ++i) { + int MaskElt = SVOp->getMaskElt(i); + if (MaskElt < 0) + continue; + Mask |= (MaskElt-l*LaneSize) << i; + } return Mask; } |