[JSC] Inline op_to_this for global object case

[Constellation]

5b9fce6

[JSC] Inline op_to_this for global object case
https://bugs.webkit.org/show_bug.cgi?id=258343
rdar://problem/111089057

Reviewed by Alexey Shvayka.

This patch inlines non-object-allocating simple ToThis operation in DFG and FTL.
And we drop OverridesToThis bit, which is no longer necessary.

* Source/JavaScriptCore/dfg/DFGAbstractInterpreterInlines.h:
(JSC::DFG::isToThisAnIdentity):
* Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp:
* Source/JavaScriptCore/ftl/FTLLowerDFGToB3.cpp:
(JSC::FTL::DFG::LowerDFGToB3::compileToThis):
* Source/JavaScriptCore/runtime/JSBigInt.h:
* Source/JavaScriptCore/runtime/JSCast.h:
* Source/JavaScriptCore/runtime/JSScope.h:
* Source/JavaScriptCore/runtime/JSString.h:
* Source/JavaScriptCore/runtime/JSType.h:
* Source/JavaScriptCore/runtime/JSTypeInfo.h:
(JSC::TypeInfo::perCellBit):
(JSC::TypeInfo::overridesToThis const): Deleted.
* Source/JavaScriptCore/runtime/Symbol.h:

Canonical link: https://commits.webkit.org/265373@main

69e507a

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🛠 gtk
	✅ 🧪 ios-wk2-wpt	✅ 🧪 mac-wk1	✅ 🧪 gtk-wk2
✅ 🛠 🧪 jsc	✅ 🧪 api-ios	✅ 🧪 mac-wk2	✅ 🧪 api-gtk
✅ 🛠 🧪 jsc-arm64	✅ 🛠 tv	🧪 mac-AS-debug-wk2	✅ 🛠 jsc-armv7
	✅ 🛠 tv-sim		✅ 🧪 jsc-armv7-tests
	✅ 🛠 watch		✅ 🛠 jsc-mips
✅ 🛠 🧪 unsafe-merge	✅ 🛠 watch-sim		✅ 🧪 jsc-mips-tests

[webkit-early-warning-system]

EWS run on current version of this PR (hash 69e507a)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🛠 gtk
	✅ 🧪 ios-wk2-wpt	✅ 🧪 mac-wk1	✅ 🧪 gtk-wk2
✅ 🛠 🧪 jsc	✅ 🧪 api-ios	✅ 🧪 mac-wk2	✅ 🧪 api-gtk
✅ 🛠 🧪 jsc-arm64	✅ 🛠 tv	🧪 mac-AS-debug-wk2	✅ 🛠 jsc-armv7
	✅ 🛠 tv-sim		✅ 🧪 jsc-armv7-tests
	✅ 🛠 watch		✅ 🛠 jsc-mips
✅ 🛠 🧪 unsafe-merge	✅ 🛠 watch-sim		✅ 🧪 jsc-mips-tests

[hyjorc1]

LGTM

[webkit-commit-queue]

Committed 265373@main (5b9fce6): https://commits.webkit.org/265373@main

Reviewed commits have been landed. Closing PR #15134 and removing active labels.