| // 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() |
| << "j" << d.JSParameterCount() << "i" << d.InputCount() << "f" |
| << d.FrameStateCount(); |
| } |
| |
| |
| 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. |
| CallInterfaceDescriptor descriptor = |
| info->code_stub()->GetCallInterfaceDescriptor(); |
| 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::Properties properties) { |
| return GetRuntimeCallDescriptor(function, parameter_count, properties, |
| this->info_->zone()); |
| } |
| |
| |
| CallDescriptor* Linkage::GetStubCallDescriptor( |
| CallInterfaceDescriptor descriptor, int stack_parameter_count, |
| CallDescriptor::Flags flags) { |
| return GetStubCallDescriptor(descriptor, stack_parameter_count, flags, |
| this->info_->zone()); |
| } |
| |
| |
| // static |
| bool Linkage::NeedsFrameState(Runtime::FunctionId function) { |
| if (!FLAG_turbo_deoptimization) { |
| return false; |
| } |
| // TODO(jarin) At the moment, we only add frame state for |
| // few chosen runtime functions. |
| switch (function) { |
| case Runtime::kDebugBreak: |
| case Runtime::kDebugGetLoadedScripts: |
| case Runtime::kDeoptimizeFunction: |
| case Runtime::kInlineCallFunction: |
| case Runtime::kPrepareStep: |
| case Runtime::kSetScriptBreakPoint: |
| case Runtime::kStackGuard: |
| case Runtime::kCheckExecutionState: |
| case Runtime::kDebugEvaluate: |
| case Runtime::kCollectStackTrace: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| |
| //============================================================================== |
| // 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::Properties properties, Zone* zone) { |
| UNIMPLEMENTED(); |
| return NULL; |
| } |
| |
| |
| CallDescriptor* Linkage::GetStubCallDescriptor( |
| CallInterfaceDescriptor descriptor, int stack_parameter_count, |
| CallDescriptor::Flags flags, Zone* zone) { |
| UNIMPLEMENTED(); |
| return NULL; |
| } |
| |
| |
| CallDescriptor* Linkage::GetSimplifiedCDescriptor(Zone* zone, |
| MachineSignature* sig) { |
| UNIMPLEMENTED(); |
| return NULL; |
| } |
| #endif // !V8_TURBOFAN_BACKEND |
| } |
| } |
| } // namespace v8::internal::compiler |