fourthTier: Small strings shouldn't get GC'd
https://bugs.webkit.org/show_bug.cgi?id=117897
Source/JavaScriptCore:
Reviewed by Mark Hahnenberg.
Kill off the code needed to allocate them lazily and finalize them.
* dfg/DFGSpeculativeJIT.cpp:
(JSC::DFG::SpeculativeJIT::compileGetByValOnString):
* heap/Heap.cpp:
(JSC::Heap::collect):
* runtime/JSString.h:
(JSC::jsSingleCharacterString):
(JSC::jsSingleCharacterSubstring):
(JSC::jsString):
(JSC::jsSubstring8):
(JSC::jsSubstring):
(JSC::jsOwnedString):
* runtime/NumberPrototype.cpp:
(JSC::integerValueToString):
* runtime/SmallStrings.cpp:
(JSC):
(JSC::SmallStrings::initializeCommonStrings):
(JSC::SmallStrings::visitStrongReferences):
* runtime/SmallStrings.h:
(JSC::SmallStrings::singleCharacterString):
(SmallStrings):
LayoutTests:
Reviewed by Mark Hahnenberg.
This test speeds up by 5%.
* fast/js/regress/script-tests/string-get-by-val.js: Added.
(foo):
* fast/js/regress/string-get-by-val-expected.txt: Added.
* fast/js/regress/string-get-by-val.html: Added.
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@153240 268f45cc-cd09-0410-ab3c-d52691b4dbfc
13 files changed
