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Ignore undef shuffle indices when checking for a VTRN shuffle. Radar 8290937.

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llvm-svn: 111208
This commit is contained in:
Bob Wilson 2010-08-16 23:37:17 +00:00
parent 9e252e854d
commit 1e40f2351c
1 changed files with 1 additions and 0 deletions
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lib/Target/ARM/ARMISelLowering.cpp
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@ -3229,6 +3229,7 @@ static bool isVTRN_v_undef_Mask(const SmallVectorImpl<int> &M, EVT VT,
unsigned NumElts = VT.getVectorNumElements();
WhichResult = (M[0] == 0 ? 0 : 1);
for (unsigned i = 0; i < NumElts; i += 2) {
if (M[i] < 0) continue;
if ((unsigned) M[i] != i + WhichResult ||
(unsigned) M[i+1] != i + WhichResult)
return false;