[WebAssembly] Fix tests and build on x86-64 Linux with BBQJIT

[takikawa]

361c5fb

[WebAssembly] Fix tests and build on x86-64 Linux with BBQJIT
https://bugs.webkit.org/show_bug.cgi?id=253618

Reviewed by Yusuke Suzuki.

This patch first enables building of the BBQJIT on x86-64 Linux
platforms by adding a line in WebKitFeatures.cmake.

The rest of the patch fixes build issues with GCC.

  - GCC doesn't support std::fabsf so use std::fabs instead.
    (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79700)
  - GCC doesn't support explicit specialization in class scope so
    this patch uses a `if constexpr` workaround.
    (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85282)
  - Add RELEASE_ASSERT_NOT_REACHED to suppress warnings.

* Source/JavaScriptCore/wasm/WasmBBQJIT.cpp:
(JSC::Wasm::BBQJIT::Location::fromArgumentLocation):
(JSC::Wasm::BBQJIT::loadOpForTypeKind):
(JSC::Wasm::BBQJIT::storeOpForTypeKind):
(JSC::Wasm::BBQJIT::addF32Copysign):
(JSC::Wasm::BBQJIT::fromJSCReg):
(JSC::Wasm::BBQJIT::fromJSCReg<RegisterID>): Deleted.
(JSC::Wasm::BBQJIT::fromJSCReg<FPRegisterID>): Deleted.
* Source/cmake/WebKitFeatures.cmake:

Canonical link: https://commits.webkit.org/261417@main

d54e299

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
	🧪 api-ios	🧪 mac-wk1	❌ 🧪 gtk-wk2
✅ 🛠 🧪 jsc	✅ 🛠 tv	✅ 🧪 mac-wk2	🧪 api-gtk
✅ 🛠 🧪 jsc-arm64	✅ 🛠 tv-sim	🧪 mac-AS-debug-wk2	✅ 🛠 jsc-armv7
	✅ 🛠 watch	✅ 🧪 mac-wk2-stress	✅ 🧪 jsc-armv7-tests
✅ 🛠 🧪 merge	✅ 🛠 watch-sim		✅ 🛠 jsc-mips
			✅ 🧪 jsc-mips-tests

[webkit-early-warning-system]

EWS run on previous version of this PR (hash a0516ba)

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
	🧪 api-ios	✅ 🧪 mac-wk1	🧪 gtk-wk2
✅ 🛠 🧪 jsc	✅ 🛠 tv	🧪 mac-wk2	🧪 api-gtk
✅ 🛠 🧪 jsc-arm64	✅ 🛠 tv-sim	🧪 mac-AS-debug-wk2	✅ 🛠 jsc-armv7
	✅ 🛠 watch	✅ 🧪 mac-wk2-stress	✅ 🧪 jsc-armv7-tests
	✅ 🛠 watch-sim		✅ 🛠 jsc-mips
			✅ 🧪 jsc-mips-tests

[Constellation]

r=me with comments.

[webkit-early-warning-system]

EWS run on current version of this PR (hash d54e299)

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
	🧪 api-ios	🧪 mac-wk1	❌ 🧪 gtk-wk2
✅ 🛠 🧪 jsc	✅ 🛠 tv	✅ 🧪 mac-wk2	🧪 api-gtk
✅ 🛠 🧪 jsc-arm64	✅ 🛠 tv-sim	🧪 mac-AS-debug-wk2	✅ 🛠 jsc-armv7
	✅ 🛠 watch	✅ 🧪 mac-wk2-stress	✅ 🧪 jsc-armv7-tests
✅ 🛠 🧪 merge	✅ 🛠 watch-sim		✅ 🛠 jsc-mips
			✅ 🧪 jsc-mips-tests

[webkit-commit-queue]

Committed 261417@main (361c5fb): https://commits.webkit.org/261417@main

Reviewed commits have been landed. Closing PR #11268 and removing active labels.