[turbofan] Add general support for sp-based frame access

src/compiler/linkage.h

 // 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.
 
 #ifndef V8_COMPILER_LINKAGE_H_
 #define V8_COMPILER_LINKAGE_H_
 
 #include "src/base/flags.h"
 #include "src/compiler/frame.h"
 #include "src/compiler/machine-type.h"
 #include "src/compiler/operator.h"
 #include "src/frames.h"
 #include "src/runtime/runtime.h"
 #include "src/zone.h"
 
 namespace v8 {
 namespace internal {
 
 class CallInterfaceDescriptor;
 class CompilationInfo;
 
 namespace compiler {
 
 const RegList kNoCalleeSaved = 0;
 
+class FrameAccessState;

[titzer, 2015/11/24 17:45:56]

I think you can drop this forward declaration now.

 class Node;
 class OsrHelper;
 
 // Describes the location for a parameter or a return value to a call.
 class LinkageLocation {
  public:
   bool operator==(const LinkageLocation& other) const {
     return bit_field_ == other.bit_field_;
   }
 
@@ skipping 145 matching lines @@
 
   // Returns the kind of this call.
   Kind kind() const { return kind_; }
 
   // Returns {true} if this descriptor is a call to a C function.
   bool IsCFunctionCall() const { return kind_ == kCallAddress; }
 
   // Returns {true} if this descriptor is a call to a JSFunction.
   bool IsJSFunctionCall() const { return kind_ == kCallJSFunction; }
 
+  bool RequiresFrameAsIncoming() const {
+    return IsCFunctionCall() || IsJSFunctionCall();
+  }
+
   // The number of return values from this call.
   size_t ReturnCount() const { return machine_sig_->return_count(); }
 
   // The number of C parameters to this call.
   size_t CParameterCount() const { return machine_sig_->parameter_count(); }
 
   // The number of stack parameters to the call.
   size_t StackParameterCount() const { return stack_param_count_; }
 
   // The number of parameters to the JS function call.
@@ skipping 140 matching lines @@
   }
 
   // Get the machine type of this function's return value.
   MachineType GetReturnType(size_t index = 0) const {
     return incoming_->GetReturnType(index);
   }
 
   bool ParameterHasSecondaryLocation(int index) const;
   LinkageLocation GetParameterSecondaryLocation(int index) const;
 
-  // Get the frame offset for a given spill slot. The location depends on the
-  // calling convention and the specific frame layout, and may thus be
-  // architecture-specific. Negative spill slots indicate arguments on the
-  // caller's frame.
-  FrameOffset GetFrameOffset(int spill_slot, Frame* frame) const;
-
   static int FrameStateInputCount(Runtime::FunctionId function);
 
   // Get the location where an incoming OSR value is stored.
   LinkageLocation GetOsrValueLocation(int index) const;
 
   // A special {Parameter} index for JSCalls that represents the new target.
   static int GetJSCallNewTargetParamIndex(int parameter_count) {
     return parameter_count + 0;  // Parameter (arity + 0) is special.
   }
 
@@ skipping 26 matching lines @@
   CallDescriptor* const incoming_;
 
   DISALLOW_COPY_AND_ASSIGN(Linkage);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_LINKAGE_H_