Pad IPInt argumINTBytecode to an even size

[danlliu]

7214ee0

Pad IPInt argumINTBytecode to an even size
https://bugs.webkit.org/show_bug.cgi?id=286369
rdar://143407486

Reviewed by Yijia Huang and Mark Lam.

During local initialization, we default initialize locals all the way until we
hit the end of our local table. Because of IPInt's design, the local table is
aligned to an even size, meaning that we may read out of bounds by 1 from the
metadata vector. We need to pad this vector with an extra dummy element to make
sure we don't go out of bounds.

* Source/JavaScriptCore/wasm/WasmIPIntGenerator.cpp:
(JSC::Wasm::IPIntGenerator::finalize):

Canonical link: https://commits.webkit.org/289308@main

048552b

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 win
🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2	✅ 🧪 win-tests
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 api-wpe
	✅ 🧪 ios-wk2-wpt	✅ 🧪 mac-wk1	✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc	✅ 🧪 api-ios	✅ 🧪 mac-wk2	✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64	❌ 🛠 vision	✅ 🧪 mac-AS-debug-wk2	✅ 🧪 gtk-wk2
	❌ 🛠 vision-sim	✅ 🧪 mac-wk2-stress	❌ 🧪 api-gtk
✅ 🛠 🧪 merge	✅ 🧪 vision-wk2	✅ 🧪 mac-intel-wk2	✅ 🛠 playstation
	❌ 🛠 tv	✅ 🛠 mac-safer-cpp	✅ 🛠 jsc-armv7
	❌ 🛠 tv-sim		✅ 🧪 jsc-armv7-tests
	❌ 🛠 watch
	❌ 🛠 watch-sim

[webkit-early-warning-system]

Starting EWS tests for 048552b. Live statuses available at the PR page, #39392

[webkit-early-warning-system]

EWS run on current version of this PR (hash 048552b)

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 win
🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2	✅ 🧪 win-tests
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 api-wpe
	✅ 🧪 ios-wk2-wpt	✅ 🧪 mac-wk1	✅ 🛠 wpe-cairo
✅ 🛠 🧪 jsc	✅ 🧪 api-ios	✅ 🧪 mac-wk2	✅ 🛠 gtk
✅ 🛠 🧪 jsc-arm64	❌ 🛠 vision	✅ 🧪 mac-AS-debug-wk2	✅ 🧪 gtk-wk2
	❌ 🛠 vision-sim	✅ 🧪 mac-wk2-stress	❌ 🧪 api-gtk
✅ 🛠 🧪 merge	✅ 🧪 vision-wk2	✅ 🧪 mac-intel-wk2	✅ 🛠 playstation
	❌ 🛠 tv	✅ 🛠 mac-safer-cpp	✅ 🛠 jsc-armv7
	❌ 🛠 tv-sim		✅ 🧪 jsc-armv7-tests
	❌ 🛠 watch
	❌ 🛠 watch-sim

[hyjorc1]

r=me

[MenloDorian]

r=me

[webkit-commit-queue]

Committed 289308@main (7214ee0): https://commits.webkit.org/289308@main

Reviewed commits have been landed. Closing PR #39392 and removing active labels.