Land the Fan (disabled)

src/compiler/linkage.cc

+// 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.
+    ASSERT(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());
+}
+
+
+//==============================================================================
+// Provide unimplemented methods on unsupported architectures, to at least link.
+//==============================================================================
+#if !V8_TURBOFAN_TARGET
+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) {
+  UNIMPLEMENTED();
+  return NULL;
+}
+
+
+CallDescriptor* Linkage::GetSimplifiedCDescriptor(
+    Zone* zone,
+    int num_params,
+    MachineRepresentation return_type,
+    MachineRepresentation* param_types) {
+  UNIMPLEMENTED();
+  return NULL;
+}
+#endif  // !V8_TURBOFAN_TARGET
+
+} } }  // namespace v8::internal::compiler