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Author SHA1 Message Date
Arthur Eubanks 2592ccdea7 [llvm-reduce] Unify pass logging 
We randomly use outs() or errs(), which makes test logs confusing.
We also randomly add/don't add a line afterward.

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D136130
 2022-10-18 08:42:37 -07:00
Matthew Voss fe50eac85c [llvm-reduce] Fix di-metadata pass test failures 
We're seeing intermittent failures in upstream bots. See:

https://lab.llvm.org/buildbot/#/builders/139/builds/29185
https://lab.llvm.org/buildbot/#/builders/238/builds/295

This appears to be due to the unstable iteration order of DenseSet.
Since we're trying to reduce a tree, it makes sense to attempt
reductions from the top down.

This also addresses post-review comments from @MatzeB.

Differential Revision: https://reviews.llvm.org/D135473
 2022-10-07 12:05:25 -07:00
Nikita Popov b56ef7519f [llvm-reduce] Fix unused variable warning (NFC) 2022-10-07 11:08:25 +02:00
Matthew Voss 2c799b7793 [llvm-reduce] Add pass that reduces DebugInfo metadata 
This new pass for llvm-reduce attempts to reduce DebugInfo metadata.
The process used is:
  1. Scan every MD node, keeping track of nodes already visited.
  2. Look for DebugInfo nodes, then record any operands that are lists.
  3. Bisect though all the elements of the collected lists.

Differential Revision: https://reviews.llvm.org/D132077
 2022-10-06 14:24:39 -07:00