[all-commits] [llvm/llvm-project] 7a9e3e: [mlir] Fix crash in RewriterGen when a `TypeConstr...

[zero9178 via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7a9e3ef77a3c4dc1cffb8ae768db6207fdab1877
      https://github.com/llvm/llvm-project/commit/7a9e3ef77a3c4dc1cffb8ae768db6207fdab1877
  Author: Markus Böck <markus.boeck02 at gmail.com>
  Date:   2022-02-03 (Thu, 03 Feb 2022)

  Changed paths:
    M mlir/test/mlir-tblgen/rewriter-errors.td
    M mlir/tools/mlir-tblgen/RewriterGen.cpp

  Log Message:
  -----------
  [mlir] Fix crash in RewriterGen when a `TypeConstraint` is not given an argument

The code assumes that a TypeConstraint in the additional constraints list specifies precisely one argument.
If the user were to not specify any, it'd result in a crash. If given more than one, the additional ones were ignored.

This patch fixes the crash and disallows user errors by adding a check that a single argument is supplied to the TypeConstraint

Differential Revision: https://reviews.llvm.org/D118763