[PATCH] D62249: RegAllocFast: Set MayLiveAcrossBlocks when allocating uses

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: qcolombet, MatzeB.
Herald added a subscriber: wdng.

Setting mayLiveOut based only on use instructions after allocating the
def block did not work if the use block was allocated before the def
block, since the virtual register uses were already removed.

      

Fixes bug 41973.


https://reviews.llvm.org/D62249

Files:
  lib/CodeGen/RegAllocFast.cpp
  test/CodeGen/X86/bug41973.ll

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