diff options
Diffstat (limited to 'deps/v8/src/wasm/wasm-subtyping.h')
| -rw-r--r-- | deps/v8/src/wasm/wasm-subtyping.h | 28 |
1 files changed, 17 insertions, 11 deletions
diff --git a/deps/v8/src/wasm/wasm-subtyping.h b/deps/v8/src/wasm/wasm-subtyping.h index 07630118c2..b247a8ddf2 100644 --- a/deps/v8/src/wasm/wasm-subtyping.h +++ b/deps/v8/src/wasm/wasm-subtyping.h @@ -48,20 +48,18 @@ V8_NOINLINE V8_EXPORT_PRIVATE bool EquivalentTypes(ValueType type1, // - rtt1 <: rtt2 iff rtt1 ~ rtt2. // For heap types, the following subtyping rules hold: // - The abstract heap types form the following type hierarchies: -// TODO(7748): abstract ref.data should become ref.struct. // -// any func extern -// | | | -// eq nofunc noextern -// / \ -// i31 data -// | | -// | array -// \ / -// none +// any func extern +// / \ | | +// eq \ nofunc noextern +// / | \ \ +// i31 array struct string +// \___|______|_____/ +// | +// none // // - All functions are subtypes of func. -// - All structs are subtypes of data. +// - All structs are subtypes of struct. // - All arrays are subtypes of array. // - An indexed heap type h1 is a subtype of indexed heap type h2 if h2 is // transitively an explicit canonical supertype of h1. @@ -82,6 +80,13 @@ V8_INLINE bool IsSubtypeOf(ValueType subtype, ValueType supertype, return IsSubtypeOfImpl(subtype, supertype, module, module); } +V8_INLINE bool TypesUnrelated(ValueType type1, ValueType type2, + const WasmModule* module1, + const WasmModule* module2) { + return !IsSubtypeOf(type1, type2, module1, module2) && + !IsSubtypeOf(type2, type1, module2, module1); +} + V8_INLINE bool IsHeapSubtypeOf(HeapType subtype, HeapType supertype, const WasmModule* sub_module, const WasmModule* super_module) { @@ -142,6 +147,7 @@ inline std::ostream& operator<<(std::ostream& oss, TypeInModule type) { << reinterpret_cast<intptr_t>(type.module); } +// Returns {kWasmBottom} if the union of {type1} and {type2} is not defined. V8_EXPORT_PRIVATE TypeInModule Union(ValueType type1, ValueType type2, const WasmModule* module1, const WasmModule* module2); |