diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/SelectionDAG.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index c46eee8a4e..177f806dbc 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -1187,7 +1187,7 @@ SDValue SelectionDAG::getVectorShuffle(MVT VT, DebugLoc dl, SDValue N1, // Canonicalize shuffle undef, undef -> undef if (N1.getOpcode() == ISD::UNDEF && N2.getOpcode() == ISD::UNDEF) - return N1; + return getUNDEF(VT); // Validate that all indices in Mask are within the range of the elements // input to the shuffle. @@ -1239,7 +1239,7 @@ SDValue SelectionDAG::getVectorShuffle(MVT VT, DebugLoc dl, SDValue N1, if (MaskVec[i] >= 0 && MaskVec[i] != (int)i) Identity = false; if (MaskVec[i] >= 0) AllUndef = false; } - if (Identity) + if (Identity && NElts == N1.getValueType().getVectorNumElements()) return N1; if (AllUndef) return getUNDEF(VT); |