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// Copyright 2014 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/linkage.h"
#include "src/code-stubs.h"
#include "src/compiler.h"
#include "src/compiler/node.h"
#include "src/compiler/pipeline.h"
#include "src/scopes.h"
namespace v8 {
namespace internal {
namespace compiler {
OStream& operator<<(OStream& os, const CallDescriptor::Kind& k) {
switch (k) {
case CallDescriptor::kCallCodeObject:
os << "Code";
break;
case CallDescriptor::kCallJSFunction:
os << "JS";
break;
case CallDescriptor::kCallAddress:
os << "Addr";
break;
}
return os;
}
OStream& operator<<(OStream& os, const CallDescriptor& d) {
// TODO(svenpanne) Output properties etc. and be less cryptic.
return os << d.kind() << ":" << d.debug_name() << ":r" << d.ReturnCount()
<< "p" << d.ParameterCount() << "i" << d.InputCount()
<< (d.CanLazilyDeoptimize() ? "deopt" : "");
}
Linkage::Linkage(CompilationInfo* info) : info_(info) {
if (info->function() != NULL) {
// If we already have the function literal, use the number of parameters
// plus the receiver.
incoming_ = GetJSCallDescriptor(1 + info->function()->parameter_count());
} else if (!info->closure().is_null()) {
// If we are compiling a JS function, use a JS call descriptor,
// plus the receiver.
SharedFunctionInfo* shared = info->closure()->shared();
incoming_ = GetJSCallDescriptor(1 + shared->formal_parameter_count());
} else if (info->code_stub() != NULL) {
// Use the code stub interface descriptor.
HydrogenCodeStub* stub = info->code_stub();
CodeStubInterfaceDescriptor* descriptor =
info_->isolate()->code_stub_interface_descriptor(stub->MajorKey());
incoming_ = GetStubCallDescriptor(descriptor);
} else {
incoming_ = NULL; // TODO(titzer): ?
}
}
FrameOffset Linkage::GetFrameOffset(int spill_slot, Frame* frame, int extra) {
if (frame->GetSpillSlotCount() > 0 || incoming_->IsJSFunctionCall() ||
incoming_->kind() == CallDescriptor::kCallAddress) {
int offset;
int register_save_area_size = frame->GetRegisterSaveAreaSize();
if (spill_slot >= 0) {
// Local or spill slot. Skip the frame pointer, function, and
// context in the fixed part of the frame.
offset =
-(spill_slot + 1) * kPointerSize - register_save_area_size + extra;
} else {
// Incoming parameter. Skip the return address.
offset = -(spill_slot + 1) * kPointerSize + kFPOnStackSize +
kPCOnStackSize + extra;
}
return FrameOffset::FromFramePointer(offset);
} else {
// No frame. Retrieve all parameters relative to stack pointer.
DCHECK(spill_slot < 0); // Must be a parameter.
int register_save_area_size = frame->GetRegisterSaveAreaSize();
int offset = register_save_area_size - (spill_slot + 1) * kPointerSize +
kPCOnStackSize + extra;
return FrameOffset::FromStackPointer(offset);
}
}
CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count) {
return GetJSCallDescriptor(parameter_count, this->info_->zone());
}
CallDescriptor* Linkage::GetRuntimeCallDescriptor(
Runtime::FunctionId function, int parameter_count,
Operator::Property properties,
CallDescriptor::DeoptimizationSupport can_deoptimize) {
return GetRuntimeCallDescriptor(function, parameter_count, properties,
can_deoptimize, this->info_->zone());
}
CallDescriptor* Linkage::GetStubCallDescriptor(
CodeStubInterfaceDescriptor* descriptor, int stack_parameter_count,
CallDescriptor::DeoptimizationSupport can_deoptimize) {
return GetStubCallDescriptor(descriptor, stack_parameter_count,
can_deoptimize, this->info_->zone());
}
//==============================================================================
// Provide unimplemented methods on unsupported architectures, to at least link.
//==============================================================================
#if !V8_TURBOFAN_BACKEND
CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count, Zone* zone) {
UNIMPLEMENTED();
return NULL;
}
CallDescriptor* Linkage::GetRuntimeCallDescriptor(
Runtime::FunctionId function, int parameter_count,
Operator::Property properties,
CallDescriptor::DeoptimizationSupport can_deoptimize, Zone* zone) {
UNIMPLEMENTED();
return NULL;
}
CallDescriptor* Linkage::GetStubCallDescriptor(
CodeStubInterfaceDescriptor* descriptor, int stack_parameter_count,
CallDescriptor::DeoptimizationSupport can_deoptimize, Zone* zone) {
UNIMPLEMENTED();
return NULL;
}
CallDescriptor* Linkage::GetSimplifiedCDescriptor(
Zone* zone, int num_params, MachineType return_type,
const MachineType* param_types) {
UNIMPLEMENTED();
return NULL;
}
#endif // !V8_TURBOFAN_BACKEND
}
}
} // namespace v8::internal::compiler
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