Removing redundant stubs for API functions.

src/ia32/macro-assembler-ia32.h

 // Copyright 2006-2009 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
@@ skipping 442 matching lines @@
   // Convenience function: call an external reference.
   void CallExternalReference(ExternalReference ref, int num_arguments);
 
   // Tail call of a runtime routine (jump).
   // Like JumpToExternalReference, but also takes care of passing the number
   // of parameters.
   void TailCallExternalReference(const ExternalReference& ext,
                                  int num_arguments,
                                  int result_size);
 
+  // Tail call of a runtime routine (jump). Try to generate the code if
+  // necessary. Do not perform a GC but instead return a retry after GC failure.
+  MUST_USE_RESULT MaybeObject* TryTailCallExternalReference(
+      const ExternalReference& ext, int num_arguments, int result_size);
+
   // Convenience function: tail call a runtime routine (jump).
   void TailCallRuntime(Runtime::FunctionId fid,
                        int num_arguments,
                        int result_size);
 
+  // Convenience function: tail call a runtime routine (jump). Try to generate
+  // the code if necessary. Do not perform a GC but instead return a retry after
+  // GC failure.
+  MUST_USE_RESULT MaybeObject* TryTailCallRuntime(Runtime::FunctionId fid,
+                                                  int num_arguments,
+                                                  int result_size);
+
   // Before calling a C-function from generated code, align arguments on stack.
   // After aligning the frame, arguments must be stored in esp[0], esp[4],
   // etc., not pushed. The argument count assumes all arguments are word sized.
   // Some compilers/platforms require the stack to be aligned when calling
   // C++ code.
   // Needs a scratch register to do some arithmetic. This register will be
   // trashed.
   void PrepareCallCFunction(int num_arguments, Register scratch);
 
   // Calls a C function and cleans up the space for arguments allocated
   // by PrepareCallCFunction. The called function is not allowed to trigger a
   // garbage collection, since that might move the code and invalidate the
   // return address (unless this is somehow accounted for by the called
   // function).
   void CallCFunction(ExternalReference function, int num_arguments);
   void CallCFunction(Register function, int num_arguments);
 
   // Prepares stack to put arguments (aligns and so on). Reserves
   // space for return value if needed (assumes the return value is a handle).
   // Uses callee-saved esi to restore stack state after call. Arguments must be
-  // stored in ApiParameterOperand(0), ApiParameterOperand(1) etc.
+  // stored in ApiParameterOperand(0), ApiParameterOperand(1) etc. Saves
+  // context (esi).
   void PrepareCallApiFunction(int stack_space, int argc);
 
   // Calls an API function. Allocates HandleScope, extracts
   // returned value from handle and propagates exceptions.
-  // Clobbers ebx, esi, edi and caller-save registers.
-  void CallApiFunctionAndReturn(ApiFunction* function, int argc);
+  // Clobbers ebx, edi and caller-save registers. Restores context.
+  MaybeObject* TryCallApiFunctionAndReturn(ApiFunction* function, int argc);
 
   // Jump to a runtime routine.
   void JumpToExternalReference(const ExternalReference& ext);
 
+  MaybeObject* TryJumpToExternalReference(const ExternalReference& ext);
+
 
   // ---------------------------------------------------------------------------
   // Utilities
 
   void Ret();
 
   // Emit code to discard a non-negative number of pointer-sized elements
   // from the stack, clobbering only the esp register.
   void Drop(int element_count);
 
@@ skipping 166 matching lines @@
   }                                                                       \
   masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_MACRO_ASSEMBLER_IA32_H_