[PATCH] D64463: [CodeExtractor] Fix sinking of allocas with multiple bitcast uses (PR42451)

[Vedant Kumar via Phabricator via llvm-commits]

vsk created this revision.
vsk added reviewers: davidxl, kachkov98.
Herald added a subscriber: hiraditya.
Herald added a project: LLVM.

An alloca which can be sunk into the extraction region may have more
than one bitcast use. Move these uses along with the alloca to prevent
use-before-def.

Testing: check-llvm, stage2 build of llc (stage2 clang build in progress)

Fixes llvm.org/PR42451.


https://reviews.llvm.org/D64463

Files:
  llvm/include/llvm/Transforms/Utils/CodeExtractor.h
  llvm/lib/Transforms/Utils/CodeExtractor.cpp
  llvm/test/Transforms/CodeExtractor/live_shrink_multiple.ll
  llvm/test/Transforms/HotColdSplit/sink-multiple-bitcasts-of-allocas-pr42451.ll

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