[all-commits] [llvm/llvm-project] e20462: [StatepointLowering] Use Constant instead of Targe...

[Danila Malyutin via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e20462a069670c24ff512cca32688a29803852f4
      https://github.com/llvm/llvm-project/commit/e20462a069670c24ff512cca32688a29803852f4
  Author: Danila Malyutin <danilaml at users.noreply.github.com>
  Date:   2024-02-13 (Tue, 13 Feb 2024)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/StatepointLowering.cpp
    A llvm/test/CodeGen/X86/statepoint-relocate-undef.ll

  Log Message:
  -----------
  [StatepointLowering] Use Constant instead of TargetConstant for undef value (#81635)

Prevents isel errors when trying to lower gc relocate of undef value
(which turns into CopyToReg of TargetConstant). Such relocates may occur
after DCE (e.g. after GVN removes some dead blocks) if there are not
passes like instcombine scheduled after to clean them up.

Fixes #80294

---------

Co-authored-by: Matt Arsenault <arsenm2 at gmail.com>