Reviewers: Sven Panne,
Message:
First step. PTAL.
Description:
Replace the recursion in PropagateMinusZeroChecks() with a loop and a
worklist.
Also refactor the related code in preparation for fixing the
range analysis.
BUG=v8:3204
Please review this at https://codereview.chromium.org/190713002/
SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files (+77, -158 lines):
M src/hydrogen-instructions.h
M src/hydrogen-instructions.cc
M src/hydrogen-minus-zero.h
M src/hydrogen-minus-zero.cc
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