[PATCH] D40792: DAG: Match truncated rotation (PR35487)

[Eli Friedman via Phabricator via llvm-commits]

efriedma added inline comments.


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Comment at: lib/CodeGen/SelectionDAG/DAGCombiner.cpp:4657
+  if (LHS.getOpcode() == ISD::TRUNCATE && RHS.getOpcode() == ISD::TRUNCATE) {
+    assert(LHS.getValueType() == RHS.getValueType());
+    if (SDNode *Rot = MatchRotate(LHS.getOperand(0), RHS.getOperand(0), DL)) {
----------------
Do you need to check that `LHS.getOperand(0).getValueType() == RHS.getOperand(0).getValueType()`?


https://reviews.llvm.org/D40792