[all-commits] [llvm/llvm-project] 85eae4: [SelectionDAG] Move extension type for ConstantSDN...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 85eae45520dd3ace28c7da34f77aaeec566ad97b
      https://github.com/llvm/llvm-project/commit/85eae45520dd3ace28c7da34f77aaeec566ad97b
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2022-03-30 (Wed, 30 Mar 2022)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h

  Log Message:
  -----------
  [SelectionDAG] Move extension type for ConstantSDNode from getCopyToRegs to HandlePHINodesInSuccessorBlocks.

D122053 set the ExtendType for ConstantSDNodes in getCopyToRegs to
ZERO_EXTEND to match assumptions in ComputePHILiveOutRegInfo. PHIs
are probably not the only way ConstantSDNodeNodes can get to
getCopyToRegs.

This patch adds an ExtendType parameter to CopyValueToVirtualRegister and
has HandlePHINodesInSuccessorBlocks pass ISD::ZERO_EXTEND for ConstantInts.
This way we only affect ConstantSDNodes for PHIs.

Reviewed By: RKSimon

Differential Revision: https://reviews.llvm.org/D122171