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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "jit/KnownClass.h"
#include "jit/MIR.h"
#include "vm/ArrayObject.h"
#include "vm/Iteration.h"
#include "vm/JSFunction.h"
#include "vm/PlainObject.h" // js::PlainObject
#include "vm/RegExpObject.h"
using namespace js;
using namespace js::jit;
KnownClass jit::GetObjectKnownClass(const MDefinition* def) {
MOZ_ASSERT(def->type() == MIRType::Object);
switch (def->op()) {
case MDefinition::Opcode::NewArray:
case MDefinition::Opcode::NewArrayDynamicLength:
case MDefinition::Opcode::NewArrayObject:
case MDefinition::Opcode::Rest:
case MDefinition::Opcode::ArgumentsSlice:
case MDefinition::Opcode::FrameArgumentsSlice:
case MDefinition::Opcode::InlineArgumentsSlice:
return KnownClass::Array;
case MDefinition::Opcode::NewObject:
case MDefinition::Opcode::NewPlainObject:
case MDefinition::Opcode::CreateThis:
return KnownClass::PlainObject;
case MDefinition::Opcode::Lambda:
case MDefinition::Opcode::FunctionWithProto:
return KnownClass::Function;
case MDefinition::Opcode::RegExp:
return KnownClass::RegExp;
case MDefinition::Opcode::NewIterator:
switch (def->toNewIterator()->type()) {
case MNewIterator::ArrayIterator:
return KnownClass::ArrayIterator;
case MNewIterator::StringIterator:
return KnownClass::StringIterator;
case MNewIterator::RegExpStringIterator:
return KnownClass::RegExpStringIterator;
}
MOZ_CRASH("unreachable");
case MDefinition::Opcode::Phi: {
if (def->numOperands() == 0) {
return KnownClass::None;
}
MDefinition* op = def->getOperand(0);
// Check for Phis to avoid recursion for now.
if (op->isPhi()) {
return KnownClass::None;
}
KnownClass known = GetObjectKnownClass(op);
if (known == KnownClass::None) {
return KnownClass::None;
}
for (size_t i = 1; i < def->numOperands(); i++) {
op = def->getOperand(i);
if (op->isPhi() || GetObjectKnownClass(op) != known) {
return KnownClass::None;
}
}
return known;
}
default:
break;
}
return KnownClass::None;
}
const JSClass* jit::GetObjectKnownJSClass(const MDefinition* def) {
switch (GetObjectKnownClass(def)) {
case KnownClass::PlainObject:
return &PlainObject::class_;
case KnownClass::Array:
return &ArrayObject::class_;
case KnownClass::Function:
return &FunctionClass;
case KnownClass::RegExp:
return &RegExpObject::class_;
case KnownClass::ArrayIterator:
return &ArrayIteratorObject::class_;
case KnownClass::StringIterator:
return &StringIteratorObject::class_;
case KnownClass::RegExpStringIterator:
return &RegExpStringIteratorObject::class_;
case KnownClass::None:
break;
}
return nullptr;
}
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