Support inlining at call-sites with mismatched number of arguments.

src/ia32/frames-ia32.h

-// Copyright 2011 the V8 project authors. All rights reserved.
+// Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
@@ skipping 78 matching lines @@
   // FP-relative displacement of the caller's SP.  It points just
   // below the saved PC.
   static const int kCallerSPDisplacement = +2 * kPointerSize;
 };
 
 
 class StandardFrameConstants : public AllStatic {
  public:
   // StandardFrame::IterateExpressions assumes that kContextOffset is the last
   // object pointer.
-  static const int kFixedFrameSize    =  4;  // Currently unused.
+  static const int kFixedFrameSize    =  4;

[Kevin Millikin (Chromium), 2012/01/24 00:08:54]

Currently unused, nice.  Maybe a comment is needed here that we're counting the
marker, context, caller fp, and caller pc as the fixed fields.

[Vyacheslav Egorov (Chromium), 2012/01/24 08:49:20]

Done.

   static const int kExpressionsOffset = -3 * kPointerSize;
   static const int kMarkerOffset      = -2 * kPointerSize;
   static const int kContextOffset     = -1 * kPointerSize;
   static const int kCallerFPOffset    =  0 * kPointerSize;
   static const int kCallerPCOffset    = +1 * kPointerSize;
   static const int kCallerSPOffset    = +2 * kPointerSize;
 };
 
 
 class JavaScriptFrameConstants : public AllStatic {
@@ skipping 23 matching lines @@
 
 inline Object* JavaScriptFrame::function_slot_object() const {
   const int offset = JavaScriptFrameConstants::kFunctionOffset;
   return Memory::Object_at(fp() + offset);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_FRAMES_IA32_H_