[all-commits] [llvm/llvm-project] 3de29a: [IRSim] Ignore debug instructions when creating ca...

[Andrew Litteken via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3de29ad20955eb8ed68e831795bf55bfe9fbe58b
      https://github.com/llvm/llvm-project/commit/3de29ad20955eb8ed68e831795bf55bfe9fbe58b
  Author: Andrew Litteken <andrew.litteken at gmail.com>
  Date:   2022-04-19 (Tue, 19 Apr 2022)

  Changed paths:
    M llvm/lib/Analysis/IRSimilarityIdentifier.cpp
    A llvm/test/Analysis/IRSimilarityIdentifier/debug-inst-starts-block.ll

  Log Message:
  -----------
  [IRSim] Ignore debug instructions when creating canonical numbering

When constructing canonical relationships between two regions, the first instruction of a basic block from the first region is used to find the corresponding basic block from the second region. However, debug instructions are not included in similarity matching, and therefore do not have a canonical numbering. This patch makes sure to ignore the debug instructions when finding the first instruction in a basic block.

Reviewer: paquette

Differential Revision: https://reviews.llvm.org/D123903