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// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/compiler/js-intrinsic-lowering.h"
#include <stack>
#include "src/code-factory.h"
#include "src/compiler/access-builder.h"
#include "src/compiler/js-graph.h"
#include "src/compiler/linkage.h"
#include "src/compiler/node-matchers.h"
#include "src/compiler/node-properties.h"
#include "src/compiler/operator-properties.h"
#include "src/counters.h"
#include "src/objects-inl.h"
#include "src/objects/js-generator.h"
namespace v8 {
namespace internal {
namespace compiler {
JSIntrinsicLowering::JSIntrinsicLowering(Editor* editor, JSGraph* jsgraph)
: AdvancedReducer(editor), jsgraph_(jsgraph) {}
Reduction JSIntrinsicLowering::Reduce(Node* node) {
if (node->opcode() != IrOpcode::kJSCallRuntime) return NoChange();
const Runtime::Function* const f =
Runtime::FunctionForId(CallRuntimeParametersOf(node->op()).id());
if (f->intrinsic_type != Runtime::IntrinsicType::INLINE) return NoChange();
switch (f->function_id) {
case Runtime::kInlineCreateIterResultObject:
return ReduceCreateIterResultObject(node);
case Runtime::kInlineDebugIsActive:
return ReduceDebugIsActive(node);
case Runtime::kInlineDeoptimizeNow:
return ReduceDeoptimizeNow(node);
case Runtime::kInlineGeneratorClose:
return ReduceGeneratorClose(node);
case Runtime::kInlineCreateJSGeneratorObject:
return ReduceCreateJSGeneratorObject(node);
case Runtime::kInlineGeneratorGetInputOrDebugPos:
return ReduceGeneratorGetInputOrDebugPos(node);
case Runtime::kInlineAsyncGeneratorReject:
return ReduceAsyncGeneratorReject(node);
case Runtime::kInlineAsyncGeneratorResolve:
return ReduceAsyncGeneratorResolve(node);
case Runtime::kInlineAsyncGeneratorYield:
return ReduceAsyncGeneratorYield(node);
case Runtime::kInlineGeneratorGetResumeMode:
return ReduceGeneratorGetResumeMode(node);
case Runtime::kInlineIsArray:
return ReduceIsInstanceType(node, JS_ARRAY_TYPE);
case Runtime::kInlineIsTypedArray:
return ReduceIsInstanceType(node, JS_TYPED_ARRAY_TYPE);
case Runtime::kInlineIsJSProxy:
return ReduceIsInstanceType(node, JS_PROXY_TYPE);
case Runtime::kInlineIsJSReceiver:
return ReduceIsJSReceiver(node);
case Runtime::kInlineIsSmi:
return ReduceIsSmi(node);
case Runtime::kInlineRejectPromise:
return ReduceRejectPromise(node);
case Runtime::kInlineResolvePromise:
return ReduceResolvePromise(node);
case Runtime::kInlineToInteger:
return ReduceToInteger(node);
case Runtime::kInlineToLength:
return ReduceToLength(node);
case Runtime::kInlineToNumber:
return ReduceToNumber(node);
case Runtime::kInlineToObject:
return ReduceToObject(node);
case Runtime::kInlineToString:
return ReduceToString(node);
case Runtime::kInlineCall:
return ReduceCall(node);
default:
break;
}
return NoChange();
}
Reduction JSIntrinsicLowering::ReduceCreateIterResultObject(Node* node) {
Node* const value = NodeProperties::GetValueInput(node, 0);
Node* const done = NodeProperties::GetValueInput(node, 1);
Node* const context = NodeProperties::GetContextInput(node);
Node* const effect = NodeProperties::GetEffectInput(node);
return Change(node, javascript()->CreateIterResultObject(), value, done,
context, effect);
}
Reduction JSIntrinsicLowering::ReduceDebugIsActive(Node* node) {
Node* const value = jsgraph()->ExternalConstant(
ExternalReference::debug_is_active_address(isolate()));
Node* const effect = NodeProperties::GetEffectInput(node);
Node* const control = NodeProperties::GetControlInput(node);
Operator const* const op =
simplified()->LoadField(AccessBuilder::ForExternalUint8Value());
return Change(node, op, value, effect, control);
}
Reduction JSIntrinsicLowering::ReduceDeoptimizeNow(Node* node) {
Node* const frame_state = NodeProperties::GetFrameStateInput(node);
Node* const effect = NodeProperties::GetEffectInput(node);
Node* const control = NodeProperties::GetControlInput(node);
// TODO(bmeurer): Move MergeControlToEnd() to the AdvancedReducer.
Node* deoptimize = graph()->NewNode(
common()->Deoptimize(DeoptimizeKind::kEager,
DeoptimizeReason::kDeoptimizeNow, VectorSlotPair()),
frame_state, effect, control);
NodeProperties::MergeControlToEnd(graph(), common(), deoptimize);
Revisit(graph()->end());
node->TrimInputCount(0);
NodeProperties::ChangeOp(node, common()->Dead());
return Changed(node);
}
Reduction JSIntrinsicLowering::ReduceCreateJSGeneratorObject(Node* node) {
Node* const closure = NodeProperties::GetValueInput(node, 0);
Node* const receiver = NodeProperties::GetValueInput(node, 1);
Node* const context = NodeProperties::GetContextInput(node);
Node* const effect = NodeProperties::GetEffectInput(node);
Node* const control = NodeProperties::GetControlInput(node);
Operator const* const op = javascript()->CreateGeneratorObject();
Node* create_generator =
graph()->NewNode(op, closure, receiver, context, effect, control);
ReplaceWithValue(node, create_generator, create_generator);
return Changed(create_generator);
}
Reduction JSIntrinsicLowering::ReduceGeneratorClose(Node* node) {
Node* const generator = NodeProperties::GetValueInput(node, 0);
Node* const effect = NodeProperties::GetEffectInput(node);
Node* const control = NodeProperties::GetControlInput(node);
Node* const closed = jsgraph()->Constant(JSGeneratorObject::kGeneratorClosed);
Node* const undefined = jsgraph()->UndefinedConstant();
Operator const* const op = simplified()->StoreField(
AccessBuilder::ForJSGeneratorObjectContinuation());
ReplaceWithValue(node, undefined, node);
NodeProperties::RemoveType(node);
return Change(node, op, generator, closed, effect, control);
}
Reduction JSIntrinsicLowering::ReduceGeneratorGetInputOrDebugPos(Node* node) {
Node* const generator = NodeProperties::GetValueInput(node, 0);
Node* const effect = NodeProperties::GetEffectInput(node);
Node* const control = NodeProperties::GetControlInput(node);
Operator const* const op = simplified()->LoadField(
AccessBuilder::ForJSGeneratorObjectInputOrDebugPos());
return Change(node, op, generator, effect, control);
}
Reduction JSIntrinsicLowering::ReduceAsyncGeneratorReject(Node* node) {
return Change(
node, Builtins::CallableFor(isolate(), Builtins::kAsyncGeneratorReject),
0);
}
Reduction JSIntrinsicLowering::ReduceAsyncGeneratorResolve(Node* node) {
return Change(
node, Builtins::CallableFor(isolate(), Builtins::kAsyncGeneratorResolve),
0);
}
Reduction JSIntrinsicLowering::ReduceAsyncGeneratorYield(Node* node) {
return Change(
node, Builtins::CallableFor(isolate(), Builtins::kAsyncGeneratorYield),
0);
}
Reduction JSIntrinsicLowering::ReduceGeneratorGetResumeMode(Node* node) {
Node* const generator = NodeProperties::GetValueInput(node, 0);
Node* const effect = NodeProperties::GetEffectInput(node);
Node* const control = NodeProperties::GetControlInput(node);
Operator const* const op =
simplified()->LoadField(AccessBuilder::ForJSGeneratorObjectResumeMode());
return Change(node, op, generator, effect, control);
}
Reduction JSIntrinsicLowering::ReduceIsInstanceType(
Node* node, InstanceType instance_type) {
// if (%_IsSmi(value)) {
// return false;
// } else {
// return %_GetInstanceType(%_GetMap(value)) == instance_type;
// }
Node* value = NodeProperties::GetValueInput(node, 0);
Node* effect = NodeProperties::GetEffectInput(node);
Node* control = NodeProperties::GetControlInput(node);
Node* check = graph()->NewNode(simplified()->ObjectIsSmi(), value);
Node* branch = graph()->NewNode(common()->Branch(), check, control);
Node* if_true = graph()->NewNode(common()->IfTrue(), branch);
Node* etrue = effect;
Node* vtrue = jsgraph()->FalseConstant();
Node* if_false = graph()->NewNode(common()->IfFalse(), branch);
Node* efalse = effect;
Node* map = efalse =
graph()->NewNode(simplified()->LoadField(AccessBuilder::ForMap()), value,
efalse, if_false);
Node* map_instance_type = efalse = graph()->NewNode(
simplified()->LoadField(AccessBuilder::ForMapInstanceType()), map, efalse,
if_false);
Node* vfalse =
graph()->NewNode(simplified()->NumberEqual(), map_instance_type,
jsgraph()->Constant(instance_type));
Node* merge = graph()->NewNode(common()->Merge(2), if_true, if_false);
// Replace all effect uses of {node} with the {ephi}.
Node* ephi = graph()->NewNode(common()->EffectPhi(2), etrue, efalse, merge);
ReplaceWithValue(node, node, ephi, merge);
// Turn the {node} into a Phi.
return Change(node, common()->Phi(MachineRepresentation::kTagged, 2), vtrue,
vfalse, merge);
}
Reduction JSIntrinsicLowering::ReduceIsJSReceiver(Node* node) {
return Change(node, simplified()->ObjectIsReceiver());
}
Reduction JSIntrinsicLowering::ReduceIsSmi(Node* node) {
return Change(node, simplified()->ObjectIsSmi());
}
Reduction JSIntrinsicLowering::ReduceRejectPromise(Node* node) {
RelaxControls(node);
NodeProperties::ChangeOp(node, javascript()->RejectPromise());
return Changed(node);
}
Reduction JSIntrinsicLowering::ReduceResolvePromise(Node* node) {
RelaxControls(node);
NodeProperties::ChangeOp(node, javascript()->ResolvePromise());
return Changed(node);
}
Reduction JSIntrinsicLowering::Change(Node* node, const Operator* op) {
// Replace all effect uses of {node} with the effect dependency.
RelaxEffectsAndControls(node);
// Remove the inputs corresponding to context, effect and control.
NodeProperties::RemoveNonValueInputs(node);
// Finally update the operator to the new one.
NodeProperties::ChangeOp(node, op);
return Changed(node);
}
Reduction JSIntrinsicLowering::ReduceToInteger(Node* node) {
NodeProperties::ChangeOp(node, javascript()->ToInteger());
return Changed(node);
}
Reduction JSIntrinsicLowering::ReduceToNumber(Node* node) {
NodeProperties::ChangeOp(node, javascript()->ToNumber());
return Changed(node);
}
Reduction JSIntrinsicLowering::ReduceToLength(Node* node) {
NodeProperties::ChangeOp(node, javascript()->ToLength());
return Changed(node);
}
Reduction JSIntrinsicLowering::ReduceToObject(Node* node) {
NodeProperties::ChangeOp(node, javascript()->ToObject());
return Changed(node);
}
Reduction JSIntrinsicLowering::ReduceToString(Node* node) {
// ToString is unnecessary if the input is a string.
HeapObjectMatcher m(NodeProperties::GetValueInput(node, 0));
if (m.HasValue() && m.Value()->IsString()) {
ReplaceWithValue(node, m.node());
return Replace(m.node());
}
NodeProperties::ChangeOp(node, javascript()->ToString());
return Changed(node);
}
Reduction JSIntrinsicLowering::ReduceCall(Node* node) {
size_t const arity = CallRuntimeParametersOf(node->op()).arity();
NodeProperties::ChangeOp(node, javascript()->Call(arity));
return Changed(node);
}
Reduction JSIntrinsicLowering::ReduceGetSuperConstructor(Node* node) {
NodeProperties::ChangeOp(node, javascript()->GetSuperConstructor());
return Changed(node);
}
Reduction JSIntrinsicLowering::Change(Node* node, const Operator* op, Node* a,
Node* b) {
RelaxControls(node);
node->ReplaceInput(0, a);
node->ReplaceInput(1, b);
node->TrimInputCount(2);
NodeProperties::ChangeOp(node, op);
return Changed(node);
}
Reduction JSIntrinsicLowering::Change(Node* node, const Operator* op, Node* a,
Node* b, Node* c) {
RelaxControls(node);
node->ReplaceInput(0, a);
node->ReplaceInput(1, b);
node->ReplaceInput(2, c);
node->TrimInputCount(3);
NodeProperties::ChangeOp(node, op);
return Changed(node);
}
Reduction JSIntrinsicLowering::Change(Node* node, const Operator* op, Node* a,
Node* b, Node* c, Node* d) {
RelaxControls(node);
node->ReplaceInput(0, a);
node->ReplaceInput(1, b);
node->ReplaceInput(2, c);
node->ReplaceInput(3, d);
node->TrimInputCount(4);
NodeProperties::ChangeOp(node, op);
return Changed(node);
}
Reduction JSIntrinsicLowering::Change(Node* node, Callable const& callable,
int stack_parameter_count) {
auto call_descriptor = Linkage::GetStubCallDescriptor(
graph()->zone(), callable.descriptor(), stack_parameter_count,
CallDescriptor::kNeedsFrameState, node->op()->properties());
node->InsertInput(graph()->zone(), 0,
jsgraph()->HeapConstant(callable.code()));
NodeProperties::ChangeOp(node, common()->Call(call_descriptor));
return Changed(node);
}
Graph* JSIntrinsicLowering::graph() const { return jsgraph()->graph(); }
Isolate* JSIntrinsicLowering::isolate() const { return jsgraph()->isolate(); }
CommonOperatorBuilder* JSIntrinsicLowering::common() const {
return jsgraph()->common();
}
JSOperatorBuilder* JSIntrinsicLowering::javascript() const {
return jsgraph_->javascript();
}
SimplifiedOperatorBuilder* JSIntrinsicLowering::simplified() const {
return jsgraph()->simplified();
}
} // namespace compiler
} // namespace internal
} // namespace v8
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