LCodeGen::CallKnownFunction gets the function in register.

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 3535 matching lines @@
   DCHECK(ToRegister(instr->context()).is(cp));
   __ li(scratch0(), instr->hydrogen()->pairs());
   __ li(scratch1(), Operand(Smi::FromInt(instr->hydrogen()->flags())));
   // The context is the first argument.
   __ Push(cp, scratch0(), scratch1());
   CallRuntime(Runtime::kDeclareGlobals, 3, instr);
 }
 
 
 void LCodeGen::CallKnownFunction(Handle<JSFunction> function,
-                                 int formal_parameter_count,
-                                 int arity,
-                                 LInstruction* instr,
-                                 A1State a1_state) {
+                                 int formal_parameter_count, int arity,
+                                 LInstruction* instr) {
   bool dont_adapt_arguments =
       formal_parameter_count == SharedFunctionInfo::kDontAdaptArgumentsSentinel;
   bool can_invoke_directly =
       dont_adapt_arguments || formal_parameter_count == arity;
 
+  Register function_reg = a1;
   LPointerMap* pointers = instr->pointer_map();
 
   if (can_invoke_directly) {
-    if (a1_state == A1_UNINITIALIZED) {
-      __ li(a1, function);
-    }
-
     // Change context.
-    __ lw(cp, FieldMemOperand(a1, JSFunction::kContextOffset));
+    __ lw(cp, FieldMemOperand(function_reg, JSFunction::kContextOffset));
 
     // Set r0 to arguments count if adaption is not needed. Assumes that r0
     // is available to write to at this point.
     if (dont_adapt_arguments) {
       __ li(a0, Operand(arity));
     }
 
     // Invoke function.
-    __ lw(at, FieldMemOperand(a1, JSFunction::kCodeEntryOffset));
+    __ lw(at, FieldMemOperand(function_reg, JSFunction::kCodeEntryOffset));
     __ Call(at);
 
     // Set up deoptimization.
     RecordSafepointWithLazyDeopt(instr, RECORD_SIMPLE_SAFEPOINT);
   } else {
     SafepointGenerator generator(this, pointers, Safepoint::kLazyDeopt);
     ParameterCount count(arity);
     ParameterCount expected(formal_parameter_count);
-    __ InvokeFunction(function, expected, count, CALL_FUNCTION, generator);
+    __ InvokeFunction(function_reg, expected, count, CALL_FUNCTION, generator);
   }
 }
 
 
 void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LMathAbs* instr) {
   DCHECK(instr->context() != NULL);
   DCHECK(ToRegister(instr->context()).is(cp));
   Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
   Register scratch = scratch0();
@@ skipping 326 matching lines @@
 
   Handle<JSFunction> known_function = instr->hydrogen()->known_function();
   if (known_function.is_null()) {
     LPointerMap* pointers = instr->pointer_map();
     SafepointGenerator generator(this, pointers, Safepoint::kLazyDeopt);
     ParameterCount count(instr->arity());
     __ InvokeFunction(a1, count, CALL_FUNCTION, generator);
   } else {
     CallKnownFunction(known_function,
                       instr->hydrogen()->formal_parameter_count(),
-                      instr->arity(),
-                      instr,
-                      A1_CONTAINS_TARGET);
+                      instr->arity(), instr);
   }
 }
 
 
 void LCodeGen::DoTailCallThroughMegamorphicCache(
     LTailCallThroughMegamorphicCache* instr) {
   Register receiver = ToRegister(instr->receiver());
   Register name = ToRegister(instr->name());
   DCHECK(receiver.is(LoadDescriptor::ReceiverRegister()));
   DCHECK(name.is(LoadDescriptor::NameRegister()));
@@ skipping 2010 matching lines @@
   __ li(at, scope_info);
   __ Push(at, ToRegister(instr->function()));
   CallRuntime(Runtime::kPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal