JSC backports for 2.46 - #1703

Open

justinmichaud wants to merge 22 commits into

WebPlatformForEmbedded:wpe-2.46from

justinmichaud:eng/246-downstream-backports

Commits on Jul 30, 2026

[JSC][armv7] Fix BBQJIT::F64CopySign on armv7

eugeneia
authored and
justinmichaud
committed
[ARMv7] Build-webkit should support --32-bit on ARM64
justinmichaud
committed
Handle wide Air::Arg offsets

aoikonomopoulos
authored and
justinmichaud
committed
[JSC] Fix integer overflow on armv7 in CompleteSubspace::tryAllocateSlow

eugeneia
authored and
justinmichaud
committed
[ARMv7] Skip branch compaction when diff would cause misalignment
justinmichaud
committed
[JSC] Fix ARMv7 segfault in BBQJIT by avoid the use of `wasmScratchGPR`

sosukesuzuki
authored and
justinmichaud
committed
Add additional padding for patchable jumps and calls on armv7
justinmichaud
committed
[ARMv7] Add padding to align patchable calls
justinmichaud
committed
[JSC] Fix shiftI64 spilling only on one side of a branch on 32-bit

mikhailramalho
authored and
justinmichaud
committed
Thumb mode not detected on gcc for arm

efecanicoz-atlas
authored and
justinmichaud
committed
[JSC][32-bit] Fix missing move when shift == 0 in BBQ

mikhailramalho
authored and
justinmichaud
committed
[JSC][32-bit] Fix BBQ's I64Or

mikhailramalho
authored and
justinmichaud
committed
[JSC][ARMv7] Don't issue a ldrd when the register holding the address is also a destination

mikhailramalho
authored and
justinmichaud
committed
[32-bit] Armv7 tail call shuffler should not run out of registers when loading cells.
justinmichaud
committed
CodeBlock should reset its StubInfo when jettisoned

danlliu
authored and
justinmichaud
committed
LLInt GetByIdModeMetadata should not hold potentially dead structure IDs

danlliu
authored and
justinmichaud
committed
[JSC] Eagerly unlinking CodeBlock when jettisoning

Constellation
authored and
justinmichaud
committed
Exclude non-user portions of the main thread stack from stack scanning on 32 bits.
justinmichaud
committed
[JSC] GetByIdModeMetadata's mode needs to be set when not using 64bit pointer

Constellation
authored and
justinmichaud
committed
[JSC][armv7] Verify MacroAssemblerARMv7::branch32 usage in debug builds

eugeneia
authored and
justinmichaud
committed
[ARMv7] Set temporaryCallFrame in WebAssembly.asm

aoikonomopoulos
authored and
justinmichaud
committed
Js/Wasm engine produce an invalid ref.cast runtime fail for func.ref types in hot functions.

Constellation
authored and
justinmichaud
committed

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JSC backports for 2.46 - #1703

JSC backports for 2.46#1703
justinmichaud wants to merge 22 commits into
WebPlatformForEmbedded:wpe-2.46from
justinmichaud:eng/246-downstream-backports

Commits on Jul 30, 2026

[JSC][armv7] Fix BBQJIT::F64CopySign on armv7

[ARMv7] Build-webkit should support --32-bit on ARM64

Handle wide Air::Arg offsets

[JSC] Fix integer overflow on armv7 in CompleteSubspace::tryAllocateSlow

[ARMv7] Skip branch compaction when diff would cause misalignment

[JSC] Fix ARMv7 segfault in BBQJIT by avoid the use of `wasmScratchGPR`

Add additional padding for patchable jumps and calls on armv7

[ARMv7] Add padding to align patchable calls

[JSC] Fix shiftI64 spilling only on one side of a branch on 32-bit

Thumb mode not detected on gcc for arm

[JSC][32-bit] Fix missing move when shift == 0 in BBQ

[JSC][32-bit] Fix BBQ's I64Or

[JSC][ARMv7] Don't issue a ldrd when the register holding the address is also a destination

[32-bit] Armv7 tail call shuffler should not run out of registers when loading cells.

CodeBlock should reset its StubInfo when jettisoned

LLInt GetByIdModeMetadata should not hold potentially dead structure IDs

[JSC] Eagerly unlinking CodeBlock when jettisoning

Exclude non-user portions of the main thread stack from stack scanning on 32 bits.

[JSC] GetByIdModeMetadata's mode needs to be set when not using 64bit pointer

[JSC][armv7] Verify MacroAssemblerARMv7::branch32 usage in debug builds

[ARMv7] Set temporaryCallFrame in WebAssembly.asm

Js/Wasm engine produce an invalid ref.cast runtime fail for func.ref types in hot functions.