Add for-in OwnStructureMode optimizations to LLInt
https://bugs.webkit.org/show_bug.cgi?id=229038
Reviewed by Saam Barati.
This patch adds the optimizations we have for OwnStructureMode in
the Baseline to the LLInt. The patch also adds redundant self move
(i.e. move a, a) elimination to arm64. Finally, a bunch of the
property offset functions are now marked constexpr and return
intptr_t rather than size_t as the values can be negative.
There's also a minor fix to disable MSVC's signed to unsigned
cast warning for LLIntOffsetsExtractor as we don't care about
signedness for extracting constants.
- dfg/DFGSpeculativeJIT.cpp:
(JSC::DFG::SpeculativeJIT::compileEnumeratorGetByVal):
(JSC::FTL::DFG::LowerDFGToB3::compileCompareStrictEq):
- jit/JITPropertyAccess.cpp:
(JSC::JIT::emit_op_enumerator_get_by_val):
- llint/LowLevelInterpreter.asm:
- llint/LowLevelInterpreter32_64.asm:
- llint/LowLevelInterpreter64.asm:
- offlineasm/arm64.rb:
- offlineasm/generate_offset_extractor.rb:
- runtime/Butterfly.h:
(JSC::Butterfly::indexOfPropertyStorage):
(JSC::offsetInButterfly):
- runtime/PropertyOffset.h:
(JSC::checkOffset):
(JSC::validateOffset):
(JSC::isValidOffset):
(JSC::isInlineOffset):
(JSC::isOutOfLineOffset):
(JSC::offsetInInlineStorage):
(JSC::offsetInOutOfLineStorage):
(JSC::offsetInRespectiveStorage):
(JSC::numberOfOutOfLineSlotsForMaxOffset):
(JSC::numberOfSlotsForMaxOffset):
(JSC::offsetForPropertyNumber):
