diff options
| author | Nadav Rotem <nadav.rotem@intel.com> | 2012-02-13 12:42:26 +0000 |
|---|---|---|
| committer | Nadav Rotem <nadav.rotem@intel.com> | 2012-02-13 12:42:26 +0000 |
| commit | 0c65064dbedc035591c4b764bfd7d781aab965a4 (patch) | |
| tree | c7b16a59ba9e10351867f0c4a2cd56e7914ae8c3 /llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | |
| parent | c5d845dc09b0b1c395b86e9e14fb4c58ce62a528 (diff) | |
| download | bcm5719-llvm-0c65064dbedc035591c4b764bfd7d781aab965a4.tar.gz bcm5719-llvm-0c65064dbedc035591c4b764bfd7d781aab965a4.zip | |
Fix a bug in DAGCombine for the optimization of BUILD_VECTOR. We cant generate a shuffle node from two vectors of different types.
llvm-svn: 150383
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 9fa5572e815..f51e7215d5b 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -7385,9 +7385,13 @@ SDValue DAGCombiner::visitBUILD_VECTOR(SDNode *N) { // If VecIn2 is unused then change it to undef. VecIn2 = VecIn2.getNode() ? VecIn2 : DAG.getUNDEF(VT); + // Check that we were able to transform all incoming values to the same type. + if (VecIn2.getValueType() != VecIn1.getValueType() || + VecIn1.getValueType() != VT) + return SDValue(); + // Only type-legal BUILD_VECTOR nodes are converted to shuffle nodes. - if (!isTypeLegal(VT) || !isTypeLegal(VecIn1.getValueType()) || - !isTypeLegal(VecIn2.getValueType())) + if (!isTypeLegal(VT)) return SDValue(); // Return the new VECTOR_SHUFFLE node. |
