[all-commits] [llvm/llvm-project] 8128d4: [RemoveDIs] Preserve debug info format in llvm-red...

[Stephen Tozer via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8128d4b1229203c2ab20d3136410c149ea3652cf
      https://github.com/llvm/llvm-project/commit/8128d4b1229203c2ab20d3136410c149ea3652cf
  Author: Stephen Tozer <stephen.tozer at sony.com>
  Date:   2024-04-22 (Mon, 22 Apr 2024)

  Changed paths:
    M llvm/test/tools/llvm-reduce/remove-dp-values.ll
    M llvm/tools/llvm-reduce/llvm-reduce.cpp

  Log Message:
  -----------
  [RemoveDIs] Preserve debug info format in llvm-reduce (#89220)

As the goal of LLVM reduce is to simplify the input file, it should not
modify the debug info format - doing so by default would make it
impossible to reduce an error that only occurs in the old format, for
example (as briefly discussed at
https://github.com/llvm/llvm-project/pull/86275). This patch uses the
new "preserve debug info format" flag in llvm-reduce to prevent the
input from being subtly transformed by llvm-reduce itself; this has no
effect on any tools used for the interestingness check (i.e. if `opt` is
invoked, it will still convert the reduced input to the new format by
default), but simply ensures that the reduced file is strictly reduced
rather than modified.



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