Reviewers: Hannes Payer,
Message:
Note that the estimate of whether an instruction can deoptimize is not quite
correct. Also, we don't catch the clearing of map words yet because we are
likely to move it from the HAllocate to the HInnerAllocate soon.
Description:
First implementation of store elimination.
BUG=
Please review this at https://codereview.chromium.org/100253004/
SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files (+288, -63 lines):
M src/flag-definitions.h
A + src/hydrogen-store-elimination.h
A src/hydrogen-store-elimination.cc
M src/hydrogen.cc
A + test/mjsunit/compiler/store-elimination.js
M tools/gyp/v8.gyp
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