Reviewers: jarin,
Message:
PTAL
Description:
Initial import of ChangeLowering.
ChangeLowering is a Reducer to lower simplified change operators
to machine subgraphs. This initial version supports ChangeBitToBool,
ChangeBoolToBit, ChangeTaggedToFloat64 and ChangeInt32ToTagged.
TEST=compiler-unittests/change-lowering-unittest
BUG=v8:3489
Please review this at https://codereview.chromium.org/460593003/
SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files (+1168, -9 lines):
A src/compiler/change-lowering.h
A src/compiler/change-lowering.cc
M src/compiler/node-properties.h
M src/unique.h
M test/compiler-unittests/DEPS
A test/compiler-unittests/change-lowering-unittest.cc
M test/compiler-unittests/compiler-unittests.h
M test/compiler-unittests/compiler-unittests.gyp
A test/compiler-unittests/node-matchers.h
A test/compiler-unittests/node-matchers.cc
M testing/gtest.gyp
A testing/gtest-type-names.h
M tools/gyp/v8.gyp
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