[PATCH] D56052: X86DAGToDAGISel::matchBitExtract() with truncation (PR36419)

[Craig Topper via Phabricator via llvm-commits]

craig.topper added inline comments.


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Comment at: lib/Target/X86/X86ISelDAGToDAG.cpp:2822
+  MVT XVT = NVT;
+  if (!Subtarget->hasBMI2() && X.getOpcode() == ISD::TRUNCATE &&
+      X.getOperand(0).getOpcode() == ISD::SRL) {
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Should we ensure the truncate input has only one use?


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D56052/new/

https://reviews.llvm.org/D56052