diff options
| author | Dan Gohman <gohman@apple.com> | 2009-07-09 00:46:33 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-07-09 00:46:33 +0000 |
| commit | 2e4284de53fb70686c5c135387006d033171da2e (patch) | |
| tree | ffaf816d22a9df4e67265b19369d0990c12ec0b2 /lib/CodeGen/SelectionDAG/SelectionDAG.cpp | |
| parent | 44f7bbd531ba2b4977d957f87e809137104933aa (diff) | |
Make SelectionDAG::getVectorShuffle work properly for VECTOR_SHUFFLE
nodes with operand types that differ from the result type. (This
doesn't normally happen right now, because
SelectionDAGLowering::visitShuffleVector normalizes vector shuffles.)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75081 91177308-0d34-0410-b5e6-96231b3b80d8
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); |