MIPS: Optimize HWrapReceiver.

src/mips/lithium-codegen-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.7
 // 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 3286 matching lines @@
   Register receiver = ToRegister(instr->receiver());
   Register function = ToRegister(instr->function());
   Register result = ToRegister(instr->result());
   Register scratch = scratch0();
 
   // If the receiver is null or undefined, we have to pass the global
   // object as a receiver to normal functions. Values have to be
   // passed unchanged to builtins and strict-mode functions.
   Label global_object, result_in_receiver;
 
-  // Do not transform the receiver to object for strict mode
-  // functions.
-  __ lw(scratch,
-         FieldMemOperand(function, JSFunction::kSharedFunctionInfoOffset));
-  __ lw(scratch,
-         FieldMemOperand(scratch, SharedFunctionInfo::kCompilerHintsOffset));
+  if (!instr->hydrogen()->known_function()) {
+    // Do not transform the receiver to object for strict mode
+    // functions.
+    __ lw(scratch,
+           FieldMemOperand(function, JSFunction::kSharedFunctionInfoOffset));
+    __ lw(scratch,
+           FieldMemOperand(scratch, SharedFunctionInfo::kCompilerHintsOffset));
 
-  // Do not transform the receiver to object for builtins.
-  int32_t strict_mode_function_mask =
-                  1 <<  (SharedFunctionInfo::kStrictModeFunction + kSmiTagSize);
-  int32_t native_mask = 1 << (SharedFunctionInfo::kNative + kSmiTagSize);
-  __ And(scratch, scratch, Operand(strict_mode_function_mask | native_mask));
-  __ Branch(&result_in_receiver, ne, scratch, Operand(zero_reg));
+    // Do not transform the receiver to object for builtins.
+    int32_t strict_mode_function_mask =
+        1 <<  (SharedFunctionInfo::kStrictModeFunction + kSmiTagSize);
+    int32_t native_mask = 1 << (SharedFunctionInfo::kNative + kSmiTagSize);
+    __ And(scratch, scratch, Operand(strict_mode_function_mask | native_mask));
+    __ Branch(&result_in_receiver, ne, scratch, Operand(zero_reg));
+  }
 
   // Normal function. Replace undefined or null with global receiver.
   __ LoadRoot(scratch, Heap::kNullValueRootIndex);
   __ Branch(&global_object, eq, receiver, Operand(scratch));
   __ LoadRoot(scratch, Heap::kUndefinedValueRootIndex);
   __ Branch(&global_object, eq, receiver, Operand(scratch));
 
   // Deoptimize if the receiver is not a JS object.
   __ SmiTst(receiver, scratch);
   DeoptimizeIf(eq, instr->environment(), scratch, Operand(zero_reg));
 
   __ GetObjectType(receiver, scratch, scratch);
   DeoptimizeIf(lt, instr->environment(),
                scratch, Operand(FIRST_SPEC_OBJECT_TYPE));
+
   __ Branch(&result_in_receiver);
-
   __ bind(&global_object);
   __ lw(result, FieldMemOperand(function, JSFunction::kContextOffset));
   __ lw(result,
         ContextOperand(result, Context::GLOBAL_OBJECT_INDEX));
   __ lw(result,
         FieldMemOperand(result, GlobalObject::kGlobalReceiverOffset));
 
   if (result.is(receiver)) {
     __ bind(&result_in_receiver);
   } else {
@@ skipping 2388 matching lines @@
   __ Subu(scratch, result, scratch);
   __ lw(result, FieldMemOperand(scratch,
                                 FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal