Reviewers: jarin,
Description:
[turbofan] Split pure nodes in the scheduler if beneficial.
If a (pure) node has two or more uses, but there exists a path from the
common dominator of these uses to end, which does not contain a use,
then we split the node such that no unnecessary computation takes place.
Note however, that this only applies if the node cannot be hoisted out
of a loop.
BUG=v8:3864
LOG=n
[email protected]
Please review this at https://codereview.chromium.org/899433005/
Base URL: https://chromium.googlesource.com/v8/v8.git@master
Affected files (+198, -28 lines):
M src/compiler.h
M src/compiler.cc
M src/compiler/common-operator.cc
M src/compiler/pipeline.cc
M src/compiler/scheduler.h
M src/compiler/scheduler.cc
M src/flag-definitions.h
A test/mjsunit/asm/splitting.js
M test/unittests/compiler/scheduler-unittest.cc
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