Object properties added using dot syntax (o.f = ...) from code that isn't in eval...

Object properties added using dot syntax (o.f = ...) from code that isn't in eval should be less likely to cause an object to become a dictionary
https://bugs.webkit.org/show_bug.cgi?id=119897

Source/JavaScriptCore:

Reviewed by Oliver Hunt.

6-10x speed-up on microbenchmarks that create large static objects. 40-65% speed-up
on Octane/gbemu. 3% overall speed-up on Octane. No slow-downs anywhere; our ability
to turn objects into dictionaries when you're storing using bracket syntax or using
eval is still in place.

* bytecode/CodeBlock.h:
(JSC::CodeBlock::putByIdContext):
* dfg/DFGOperations.cpp:
* jit/JITStubs.cpp:
(JSC::DEFINE_STUB_FUNCTION):
* llint/LLIntSlowPaths.cpp:
(JSC::LLInt::LLINT_SLOW_PATH_DECL):
* runtime/JSObject.h:
(JSC::JSObject::putDirectInternal):
* runtime/PutPropertySlot.h:
(JSC::PutPropertySlot::PutPropertySlot):
(JSC::PutPropertySlot::context):
* runtime/Structure.cpp:
(JSC::Structure::addPropertyTransition):
* runtime/Structure.h:

LayoutTests:

Reviewed by Oliver Hunt.

* fast/js/regress/lots-of-fields-expected.txt: Added.
* fast/js/regress/lots-of-fields.html: Added.
* fast/js/regress/script-tests/lots-of-fields.js: Added.
(foo):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@154199 268f45cc-cd09-0410-ab3c-d52691b4dbfc