JSC backports for 2.46 - #1703

Merged

justinmichaud merged 22 commits into

WebPlatformForEmbedded:wpe-2.46from

justinmichaud:eng/246-downstream-backports

Sep 8, 2026

Commits on Aug 8, 2026

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

eugeneia
authored and
justinmichaud
committed
2a4fec7
[ARMv7] Build-webkit should support --32-bit on ARM64
justinmichaud
committed
c118d36
Handle wide Air::Arg offsets

aoikonomopoulos
authored and
justinmichaud
committed
bfe0311
[JSC] Fix integer overflow on armv7 in CompleteSubspace::tryAllocateSlow

eugeneia
authored and
justinmichaud
committed
dcba947
[ARMv7] Skip branch compaction when diff would cause misalignment
justinmichaud
committed
9a4ac50
[JSC] Fix ARMv7 segfault in BBQJIT by avoid the use of `wasmScratchGPR`

sosukesuzuki
authored and
justinmichaud
committed
a7c87b8
Add additional padding for patchable jumps and calls on armv7
justinmichaud
committed
87bb90f
[ARMv7] Add padding to align patchable calls
justinmichaud
committed
34c549e
[JSC] Fix shiftI64 spilling only on one side of a branch on 32-bit

mikhailramalho
authored and
justinmichaud
committed
35cd9f9
Thumb mode not detected on gcc for arm

efecanicoz-atlas
authored and
justinmichaud
committed
fb005b7
[JSC][32-bit] Fix missing move when shift == 0 in BBQ

mikhailramalho
authored and
justinmichaud
committed
441c595
[JSC][32-bit] Fix BBQ's I64Or

mikhailramalho
authored and
justinmichaud
committed
07ec4bb
[JSC][ARMv7] Don't issue a ldrd when the register holding the address is also a destination

mikhailramalho
authored and
justinmichaud
committed
8f11ea1
[32-bit] Armv7 tail call shuffler should not run out of registers when loading cells.
justinmichaud
committed
3def3bd
CodeBlock should reset its StubInfo when jettisoned

danlliu
authored and
justinmichaud
committed
d021461
LLInt GetByIdModeMetadata should not hold potentially dead structure IDs

danlliu
authored and
justinmichaud
committed
293d6f0
[JSC] Eagerly unlinking CodeBlock when jettisoning

Constellation
authored and
justinmichaud
committed
90450c5
Exclude non-user portions of the main thread stack from stack scanning on 32 bits.
justinmichaud
committed
c75f65a
[JSC] GetByIdModeMetadata's mode needs to be set when not using 64bit pointer

Constellation
authored and
justinmichaud
committed
32934c9
[JSC][armv7] Verify MacroAssemblerARMv7::branch32 usage in debug builds

eugeneia
authored and
justinmichaud
committed
46f4ee0
[ARMv7] Set temporaryCallFrame in WebAssembly.asm

aoikonomopoulos
authored and
justinmichaud
committed
9fbbbaf
Js/Wasm engine produce an invalid ref.cast runtime fail for func.ref types in hot functions.

Constellation
authored and
justinmichaud
committed
caf5df2

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JSC backports for 2.46 - #1703

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

Commits on Aug 8, 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.