ARM: Don't require the receiver on the stack for load IC...

src/arm/stub-cache-arm.cc

 // 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 1599 matching lines @@
 
   // Return the generated code.
   return GetCode(NORMAL, name);
 }
 
 
 Object* LoadStubCompiler::CompileLoadNonexistent(String* name,
                                                  JSObject* object,
                                                  JSObject* last) {
   // ----------- S t a t e -------------
-  //  -- r2    : name
+  //  -- r0    : receiver
   //  -- lr    : return address
-  //  -- [sp]  : receiver
   // -----------------------------------
   Label miss;
 
-  // Load receiver.
-  __ ldr(r0, MemOperand(sp, 0));
-
   // Check that receiver is not a smi.
   __ tst(r0, Operand(kSmiTagMask));
   __ b(eq, &miss);
 
   // Check the maps of the full prototype chain.
   CheckPrototypes(object, r0, last, r3, r1, name, &miss);
 
   // If the last object in the prototype chain is a global object,
   // check that the global property cell is empty.
   if (last->IsGlobalObject()) {
@@ skipping 16 matching lines @@
   // Return the generated code.
   return GetCode(NONEXISTENT, Heap::empty_string());
 }
 
 
 Object* LoadStubCompiler::CompileLoadField(JSObject* object,
                                            JSObject* holder,
                                            int index,
                                            String* name) {
   // ----------- S t a t e -------------
+  //  -- r0    : receiver
   //  -- r2    : name
   //  -- lr    : return address
-  //  -- [sp]  : receiver
   // -----------------------------------
   Label miss;
 
-  __ ldr(r0, MemOperand(sp, 0));
-
   GenerateLoadField(object, holder, r0, r3, r1, index, name, &miss);
   __ bind(&miss);
   GenerateLoadMiss(masm(), Code::LOAD_IC);
 
   // Return the generated code.
   return GetCode(FIELD, name);
 }
 
 
 Object* LoadStubCompiler::CompileLoadCallback(String* name,
                                               JSObject* object,
                                               JSObject* holder,
                                               AccessorInfo* callback) {
   // ----------- S t a t e -------------
+  //  -- r0    : receiver
   //  -- r2    : name
   //  -- lr    : return address
-  //  -- [sp]  : receiver
   // -----------------------------------
   Label miss;
 
-  __ ldr(r0, MemOperand(sp, 0));
   Failure* failure = Failure::InternalError();
   bool success = GenerateLoadCallback(object, holder, r0, r2, r3, r1,
                                       callback, name, &miss, &failure);
   if (!success) return failure;
 
   __ bind(&miss);
   GenerateLoadMiss(masm(), Code::LOAD_IC);
 
   // Return the generated code.
   return GetCode(CALLBACKS, name);
 }
 
 
 Object* LoadStubCompiler::CompileLoadConstant(JSObject* object,
                                               JSObject* holder,
                                               Object* value,
                                               String* name) {
   // ----------- S t a t e -------------
+  //  -- r0    : receiver
   //  -- r2    : name
   //  -- lr    : return address
-  //  -- [sp] : receiver
   // -----------------------------------
   Label miss;
 
-  __ ldr(r0, MemOperand(sp, 0));
-
   GenerateLoadConstant(object, holder, r0, r3, r1, value, name, &miss);
   __ bind(&miss);
   GenerateLoadMiss(masm(), Code::LOAD_IC);
 
   // Return the generated code.
   return GetCode(CONSTANT_FUNCTION, name);
 }
 
 
 Object* LoadStubCompiler::CompileLoadInterceptor(JSObject* object,
                                                  JSObject* holder,
                                                  String* name) {
   // ----------- S t a t e -------------
+  //  -- r0    : receiver
   //  -- r2    : name
   //  -- lr    : return address
-  //  -- [sp]  : receiver
   // -----------------------------------
   Label miss;
 
-  __ ldr(r0, MemOperand(sp, 0));
-
   LookupResult lookup;
   LookupPostInterceptor(holder, name, &lookup);
   GenerateLoadInterceptor(object,
                           holder,
                           &lookup,
                           r0,
                           r2,
                           r3,
                           r1,
                           name,
                           &miss);
   __ bind(&miss);
   GenerateLoadMiss(masm(), Code::LOAD_IC);
 
   // Return the generated code.
   return GetCode(INTERCEPTOR, name);
 }
 
 
 Object* LoadStubCompiler::CompileLoadGlobal(JSObject* object,
                                             GlobalObject* holder,
                                             JSGlobalPropertyCell* cell,
                                             String* name,
                                             bool is_dont_delete) {
   // ----------- S t a t e -------------
+  //  -- r0    : receiver
   //  -- r2    : name
   //  -- lr    : return address
-  //  -- r0    : receiver
-  //  -- sp[0] : receiver
   // -----------------------------------
   Label miss;
 
   // If the object is the holder then we know that it's a global
   // object which can only happen for contextual calls. In this case,
   // the receiver cannot be a smi.
   if (object != holder) {
     __ tst(r0, Operand(kSmiTagMask));
     __ b(eq, &miss);
   }
@@ skipping 366 matching lines @@
   // Return the generated code.
   return GetCode();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM