[all-commits] [llvm/llvm-project] f676e8: [TableGen] Fix operand constraint checking problem...

[Jason Eckhardt via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f676e84bba016157f5879fa66d86737ac8920c4b
      https://github.com/llvm/llvm-project/commit/f676e84bba016157f5879fa66d86737ac8920c4b
  Author: Jason Eckhardt <jeckhardt at nvidia.com>
  Date:   2024-03-20 (Wed, 20 Mar 2024)

  Changed paths:
    M llvm/test/TableGen/ConstraintChecking3.td
    A llvm/test/TableGen/ConstraintChecking8.td
    M llvm/utils/TableGen/CodeGenInstruction.cpp

  Log Message:
  -----------
  [TableGen] Fix operand constraint checking problem. (#85859)

Currently operand constraint checks on "$dest = $src" are inadvertently
accepting any token that contains "=". This has surprising results, e.g,
"$dest != $src" is accepted as a constraint but then treated as "=".

This patch ensures that only exactly the token "=" is accepted.



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