[PATCH] D112268: [LegalizeTypes][RISCV][PowerPC] Expand CTLZ/CTTZ/CTPOP instead of promoting if they'll be expanded later.

[Craig Topper via Phabricator via llvm-commits]

craig.topper added inline comments.


================
Comment at: llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp:615
+  // original type.
+  if (N->getOpcode() == ISD::CTPOP && !OVT.isVector() &&
+      !TLI.isOperationLegalOrCustomOrPromote(ISD::CTPOP, NVT)) {
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We should maybe expand parity as well to avoid an unneeded zero extend that SimplifyDemandedBits can't get rid of right now. Probably due to multiple uses. But we need to move ExpandPARITY from LegalizeDAG to TargetLowering first.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D112268/new/

https://reviews.llvm.org/D112268