X64: Implement InstanceofStub. Prohibit zero-size code objects.

src/x64/macro-assembler-x64.h

 // Copyright 2006-2008 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 158 matching lines @@
   void Jump(Address destination, RelocInfo::Mode rmode);
   void Jump(ExternalReference ext);
   void Jump(Handle<Code> code_object, RelocInfo::Mode rmode);
 
   void Call(Address destination, RelocInfo::Mode rmode);
   void Call(ExternalReference ext);
   void Call(Handle<Code> code_object, RelocInfo::Mode rmode);
 
   // Compare object type for heap object.
   // Incoming register is heap_object and outgoing register is map.
+  // They may be the same register, and may be kScratchRegister.
   void CmpObjectType(Register heap_object, InstanceType type, Register map);
 
   // Compare instance type for map.
   void CmpInstanceType(Register map, InstanceType type);
 
   // FCmp is similar to integer cmp, but requires unsigned
   // jcc instructions (je, ja, jae, jb, jbe, je, and jz).
   void FCmp();
 
   // ---------------------------------------------------------------------------
@@ skipping 41 matching lines @@
                         JumpTarget* then_target);
 
   // Check if result is zero and any of op1 and op2 are negative.
   // Register scratch is destroyed, and it must be different from op2.
   void NegativeZeroTest(Register result, Register op1, Register op2,
                         Register scratch, Label* then_label);
 
   // Try to get function prototype of a function and puts the value in
   // the result register. Checks that the function really is a
   // function and jumps to the miss label if the fast checks fail. The
-  // function register will be untouched; the other registers may be
+  // function register will be untouched; the other register may be
   // clobbered.
   void TryGetFunctionPrototype(Register function,
                                Register result,
-                               Register scratch,
                                Label* miss);
 
   // Generates code for reporting that an illegal operation has
   // occurred.
   void IllegalOperation(int num_arguments);
 
   // ---------------------------------------------------------------------------
   // Runtime calls
 
   // Call a code stub.
@@ skipping 122 matching lines @@
   return Operand(object, index, scale, offset - kHeapObjectTag);
 }
 
 
 #ifdef GENERATED_CODE_COVERAGE
 extern void LogGeneratedCodeCoverage(const char* file_line);
 #define CODE_COVERAGE_STRINGIFY(x) #x
 #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x)
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
 #define ACCESS_MASM(masm) {                                               \
-    byte* x64_coverage_function =                                        \
+    byte* x64_coverage_function =                                         \
         reinterpret_cast<byte*>(FUNCTION_ADDR(LogGeneratedCodeCoverage)); \
     masm->pushfd();                                                       \
     masm->pushad();                                                       \
     masm->push(Immediate(reinterpret_cast<int>(&__FILE_LINE__)));         \
-    masm->call(x64_coverage_function, RelocInfo::RUNTIME_ENTRY);         \
+    masm->call(x64_coverage_function, RelocInfo::RUNTIME_ENTRY);          \
     masm->pop(rax);                                                       \
     masm->popad();                                                        \
     masm->popfd();                                                        \
   }                                                                       \
   masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_MACRO_ASSEMBLER_X64_H_