[PATCH] D134192: [GISel] TreeMatcher: always skip leaves if they don't care

Kai Nacke via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Mon Sep 19 09:23:25 PDT 2022


Kai created this revision.
Kai added reviewers: aemerson, dsanders, arsenm.
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Kai requested review of this revision.
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Herald added a project: LLVM.

In `GIMatchTreeOpcodePartitioner::applyForPartition()`, the loop over
the possible leaves skip a leaf if the instruction does not care
about the instruction.
When processing the referenced operands in the next loop the same
leaves need to be skipped.

This fixes a crash in llvm-tblgen.


https://reviews.llvm.org/D134192

Files:
  llvm/test/TableGen/GICombinerEmitter/match-tree.td
  llvm/utils/TableGen/GlobalISel/GIMatchTree.cpp

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