MIRType
BaselineInspector::expectedPropertyAccessInputType(jsbytecode* pc)
{
if (!hasBaselineScript())
return MIRType_Value;
const ICEntry& entry = icEntryFromPC(pc);
MIRType type = MIRType_None;
for (ICStub* stub = entry.firstStub(); stub; stub = stub->next()) {
MIRType stubType;
switch (stub->kind()) {
case ICStub::GetProp_Fallback:
if (stub->toGetProp_Fallback()->hadUnoptimizableAccess())
return MIRType_Value;
continue;
case ICStub::GetElem_Fallback:
if (stub->toGetElem_Fallback()->hadUnoptimizableAccess())
return MIRType_Value;
continue;
case ICStub::GetProp_Generic:
return MIRType_Value;
case ICStub::GetProp_ArgumentsLength:
case ICStub::GetElem_Arguments:
// Either an object or magic arguments.
return MIRType_Value;
case ICStub::GetProp_ArrayLength:
case ICStub::GetProp_UnboxedArrayLength:
case ICStub::GetProp_Native:
case ICStub::GetProp_NativeDoesNotExist:
case ICStub::GetProp_NativePrototype:
case ICStub::GetProp_Unboxed:
case ICStub::GetProp_TypedObject:
case ICStub::GetProp_CallScripted:
case ICStub::GetProp_CallNative:
case ICStub::GetProp_CallDOMProxyNative:
case ICStub::GetProp_CallDOMProxyWithGenerationNative:
case ICStub::GetProp_DOMProxyShadowed:
case ICStub::GetElem_NativeSlot:
case ICStub::GetElem_NativePrototypeSlot:
case ICStub::GetElem_NativePrototypeCallNative:
case ICStub::GetElem_NativePrototypeCallScripted:
case ICStub::GetElem_String:
case ICStub::GetElem_Dense:
case ICStub::GetElem_TypedArray:
case ICStub::GetElem_UnboxedArray:
stubType = MIRType_Object;
break;
case ICStub::GetProp_Primitive:
stubType = MIRTypeFromValueType(stub->toGetProp_Primitive()->primitiveType());
break;
case ICStub::GetProp_StringLength:
stubType = MIRType_String;
break;
default:
MOZ_CRASH("Unexpected stub");
}
if (type != MIRType_None) {
if (type != stubType)
return MIRType_Value;
} else {
type = stubType;
}
}
return (type == MIRType_None) ? MIRType_Value : type;
}
