Reviewers: Igor Sheludko,
Description:
[runtime] Introduce a dedicated JSIteratorResult type.
Use a single JSIteratorResult type for all implementation provided
iterator results (i.e. the String, Array and collection iterators,
and also for generators). This removes one source of unnecessary
polymorphism in for-of loops. It is accomplished by a new intrinsic
%_CreateIterResultObject() that should be used to create iterator
result objects from JavaScript builtins (there's a matching factory
method for C++ code).
Also restructure the %StringIteratorPrototype%.next() and
%ArrayIteratorPrototype%.next() functions to be a bit more friendly
to optimizing compilers.
[email protected]
Please review this at https://codereview.chromium.org/1302173007/
Base URL: https://chromium.googlesource.com/v8/v8.git@master
Affected files (+494, -262 lines):
M src/array-iterator.js
M src/bootstrapper.cc
M src/collection-iterator.js
M src/contexts.h
M src/factory.h
M src/factory.cc
M src/full-codegen/arm/full-codegen-arm.cc
M src/full-codegen/arm64/full-codegen-arm64.cc
M src/full-codegen/full-codegen.h
M src/full-codegen/ia32/full-codegen-ia32.cc
M src/full-codegen/mips/full-codegen-mips.cc
M src/full-codegen/mips64/full-codegen-mips64.cc
M src/full-codegen/x64/full-codegen-x64.cc
M src/heap/objects-visiting.cc
M src/hydrogen.h
M src/hydrogen.cc
M src/objects.h
M src/objects-debug.cc
M src/objects-inl.h
M src/objects-printer.cc
M src/runtime/runtime.h
M src/runtime/runtime-object.cc
M src/string-iterator.js
M src/x64/macro-assembler-x64.h
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