[all-commits] [llvm/llvm-project] c09f1f: [GlobalISel][Tablegen] Fix SameOperandMatcher's is...

[Konstantin Schwarz via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c09f1fc74c9b16ffbfa54827e4739c7576cc890b
      https://github.com/llvm/llvm-project/commit/c09f1fc74c9b16ffbfa54827e4739c7576cc890b
  Author: Konstantin Schwarz <konstantin.schwarz at hightec-rt.com>
  Date:   2021-10-28 (Thu, 28 Oct 2021)

  Changed paths:
    A llvm/test/TableGen/GlobalISelEmitterMatchTableOptimizerSameOperand-invalid.td
    A llvm/test/TableGen/GlobalISelEmitterMatchTableOptimizerSameOperand.td
    M llvm/utils/TableGen/GlobalISelEmitter.cpp

  Log Message:
  -----------
  [GlobalISel][Tablegen] Fix SameOperandMatcher's isIdentical check

During rule optimization, identical SameOperandMatchers are hoisted into a common group,
however previously only one operand index was considered.
Commutable patterns can introduce SameOperandMatcher checks where the second index is commuted,
resulting in a different check that cannot be hoisted.

Reviewed By: qcolombet

Differential Revision: https://reviews.llvm.org/D111506