[all-commits] [llvm/llvm-project] 716353: [DAGCombiner] When combining (sext_inreg (zext X), ...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7163539466d7e8930416e55dd9fd29891f8239f2
      https://github.com/llvm/llvm-project/commit/7163539466d7e8930416e55dd9fd29891f8239f2
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2023-06-15 (Thu, 15 Jun 2023)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

  Log Message:
  -----------
  [DAGCombiner] When combining (sext_inreg (zext X), VT) -> (sext X) don't pass along the sext_inreg VT.

ISD::SIGN_EXTEND is only supposed to have one operand, but we
were creating it with 2 operands.

Since we basically never check for extra operands this went
unnoticed.