[PATCH] D34640: Create a PHI value when merging with a known undef live-in

[Krzysztof Parzyszek via Phabricator via llvm-commits]

kparzysz updated this revision to Diff 104149.
kparzysz marked an inline comment as done.
kparzysz added a comment.

Replaced the .ll testcase with a shorter .mir.  Avoided two Map lookups when checking block live-out value.


Repository:
  rL LLVM

https://reviews.llvm.org/D34640

Files:
  lib/CodeGen/LiveRangeCalc.cpp
  test/CodeGen/Hexagon/regalloc-liveout-undef.mir

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