[PATCH] D34069: [DAGCombiner] Fix PR33368 (vector extend/truncate optimization)

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


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Comment at: lib/CodeGen/SelectionDAG/DAGCombiner.cpp:15085
+  unsigned ExtDstSizeInBits = N0.getScalarValueSizeInBits();
+  unsigned ExtScale = ExtDstSizeInBits / ExtSrcSizeInBits;
 
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Add a check that (ExtDstSizeInBits % ExtSrcSizeInBits) == 0? Either an assert or early-out


https://reviews.llvm.org/D34069