[all-commits] [llvm/llvm-project] e02701: [PatternMatch] Fix issue of stale reference in new...

[goldsteinn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e027017337cc8ae6ed03dc2a3d1c9903ea2f33b2
      https://github.com/llvm/llvm-project/commit/e027017337cc8ae6ed03dc2a3d1c9903ea2f33b2
  Author: goldsteinn <35538541+goldsteinn at users.noreply.github.com>
  Date:   2024-07-15 (Mon, 15 Jul 2024)

  Changed paths:
    M llvm/include/llvm/IR/PatternMatch.h
    M llvm/unittests/IR/PatternMatch.cpp

  Log Message:
  -----------
  [PatternMatch] Fix issue of stale reference in new `m_{I,F,}Cmp` matchers (#98866)

The new matchers don't output pred. Previously we where just creating
a value on the stack and using it as a dummy output for the matchers,
but this results in a stale reference upon return.

To fix, this patch changes the output variable to a pointer, and
passes in `nullptr` for the matchers that don't output `pred.`



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