[PATCH] D47372: StackColoring: better handling of statically unreachable code

[Than McIntosh via Phabricator via llvm-commits]

thanm created this revision.
Herald added a subscriber: llvm-commits.

Avoid assert/crash during liveness calculation in situations
where the incoming machine function has statically unreachable BBs.
Second attempt at submitting; tis version of the change includes
a revised testcase.

Fixes PR37130.


Repository:
  rL LLVM

https://reviews.llvm.org/D47372

Files:
  lib/CodeGen/StackColoring.cpp
  test/CodeGen/X86/PR37310.mir

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