Daniel Jasper 4bb224decb Small cleanup of MachineLICM.cpp ...

Specifically:
- Calculate the loop pre-header once at the stat of HoistOutOfLoop, so:
  - We don't-DFS walk the MachineDomTree if we aren't going to do anything
  - Don't call getCurPreheader for each Scope
- Don't needlessly use a do-while loop
- Use early exit for Scopes.size() == 0

No functional changes intended.

llvm-svn: 228350

2015-02-05 22:39:46 +00:00

53 KiB

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