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Fix a bug in vpermilps mask checking. Fix PR10560 

llvm-svn: 137194
This commit is contained in:
Bruno Cardoso Lopes 2011-08-10 01:54:17 +00:00
parent c6bd551db0
commit 278ffd7d8e
2 changed files with 12 additions and 3 deletions
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9
llvm/lib/Target/X86/X86ISelLowering.cpp
View File

@ -3509,9 +3509,12 @@ static bool isVPERMILPSMask(const SmallVectorImpl<int> &Mask, EVT VT,
int LaneSize = NumElts/NumLanes;
for (int i = 0; i < LaneSize; ++i) {
int HighElt = i+LaneSize;
if (Mask[i] < 0 && (isUndefOrInRange(Mask[HighElt], LaneSize, NumElts)))
continue;
if (Mask[HighElt] < 0 && (isUndefOrInRange(Mask[i], 0, LaneSize)))
bool HighValid = isUndefOrInRange(Mask[HighElt], LaneSize, NumElts);
bool LowValid = isUndefOrInRange(Mask[i], 0, LaneSize);
if (!HighValid || !LowValid)
return false;
if (Mask[i] < 0 || Mask[HighElt] < 0)
continue;
if (Mask[HighElt]-Mask[i] != LaneSize)
return false;

6
llvm/test/CodeGen/X86/avx-vpermil.ll
View File

@ -37,3 +37,9 @@ entry:
ret <8 x float> %shuffle
}
; CHECK-NOT: vpermilps
define <8 x float> @funcF(<8 x float> %a) nounwind uwtable readnone ssp {
entry:
%shuffle = shufflevector <8 x float> %a, <8 x float> zeroinitializer, <8 x i32> <i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9>
ret <8 x float> %shuffle
}