Reviewers: Michael Starzinger,
Description:
[turbofan] Use heavy-handed graph duplication to do loop peeling for OSR.
BUG=
Please review this at https://codereview.chromium.org/898353002/
Base URL: https://chromium.googlesource.com/v8/v8.git@master
Affected files (+316, -12 lines):
M src/compiler/loop-analysis.h
M src/compiler/loop-analysis.cc
M src/compiler/osr.cc
M src/compiler/pipeline.cc
A test/mjsunit/compiler/osr-backedges1.js
A test/mjsunit/compiler/osr-maze1.js
A test/mjsunit/compiler/osr-maze2.js
M test/mjsunit/compiler/osr-nested2.js
A + test/mjsunit/compiler/osr-nested2b.js
M test/mjsunit/compiler/osr-nested3.js
A + test/mjsunit/compiler/osr-nested3b.js
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