Reviewers: Weiliang, mvstanton,
Description:
X87: Encapsulate megamorphic load/tail-call in hydrogen
port r23772.
original commit message:
To aid vector-based load ic work, we need to be able to handle
the megamorphic load case in hydrogen. A simple approach is to
wrap the probe activity in a hydrogen instruction.
The instruction is novel in that it always tail-calls away.
BUG=
Please review this at https://codereview.chromium.org/564683002/
SVN Base: https://github.com/v8/v8.git@bleeding_edge
Affected files (+80, -31 lines):
M src/ic/x87/ic-x87.cc
M src/ic/x87/stub-cache-x87.cc
M src/x87/lithium-codegen-x87.cc
M src/x87/lithium-x87.h
M src/x87/lithium-x87.cc
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