Implement typeof in fast compiler.

src/arm/fast-codegen-arm.cc

 // Copyright 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 714 matching lines @@
 
   // Record the source position for the property load.
   SetSourcePosition(expr->position());
 
   // Evaluate receiver.
   Visit(expr->obj());
 
   if (key->AsLiteral() != NULL && key->AsLiteral()->handle()->IsSymbol() &&
       !String::cast(*(key->AsLiteral()->handle()))->AsArrayIndex(&dummy)) {
     // Do a NAMED property load.
-    // The IC expects the property name in ecx and the receiver on the stack.
+    // The IC expects the property name in r2 and the receiver on the stack.
     __ mov(r2, Operand(key->AsLiteral()->handle()));
     Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize));
     __ Call(ic, RelocInfo::CODE_TARGET);
   } else {
     // Do a KEYED property load.
     Visit(expr->key());
     Handle<Code> ic(Builtins::builtin(Builtins::KeyedLoadIC_Initialize));
     __ Call(ic, RelocInfo::CODE_TARGET);
     // Drop key and receiver left on the stack by IC.
     __ pop();
@@ skipping 162 matching lines @@
     Visit(args->at(i));
     ASSERT_EQ(Expression::kValue, args->at(i)->context());
   }
 
   __ CallRuntime(function, arg_count);
   Move(expr->context(), r0);
 }
 
 
 void FastCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
-  Comment cmnt(masm_, "[ UnaryOperation");
   switch (expr->op()) {
-    case Token::VOID:
+    case Token::VOID: {
+      Comment cmnt(masm_, "[ UnaryOperation (VOID)");
       Visit(expr->expression());
       ASSERT_EQ(Expression::kEffect, expr->expression()->context());
       switch (expr->context()) {
         case Expression::kUninitialized:
           UNREACHABLE();
           break;
         case Expression::kEffect:
           break;
         case Expression::kValue:
           __ LoadRoot(ip, Heap::kUndefinedValueRootIndex);
           __ push(ip);
           break;
         case Expression::kTestValue:
           // Value is false so it's needed.
           __ LoadRoot(ip, Heap::kUndefinedValueRootIndex);
           __ push(ip);
         case Expression::kTest:  // Fall through.
         case Expression::kValueTest:
           __ jmp(false_label_);
           break;
       }
       break;
+    }
 
     case Token::NOT: {
+      Comment cmnt(masm_, "[ UnaryOperation (NOT)");
       ASSERT_EQ(Expression::kTest, expr->expression()->context());
 
       Label push_true;
       Label push_false;
       Label done;
       Label* saved_true = true_label_;
       Label* saved_false = false_label_;
       switch (expr->context()) {
         case Expression::kUninitialized:
           UNREACHABLE();
@@ skipping 44 matching lines @@
           __ LoadRoot(ip, Heap::kFalseValueRootIndex);
           __ push(ip);
           __ jmp(saved_false);
           break;
       }
       true_label_ = saved_true;
       false_label_ = saved_false;
       break;
     }
 
+    case Token::TYPEOF: {
+      Comment cmnt(masm_, "[ UnaryOperation (TYPEOF)");
+      ASSERT_EQ(Expression::kValue, expr->expression()->context());
+
+      VariableProxy* proxy = expr->expression()->AsVariableProxy();
+      if (proxy != NULL && proxy->var()->is_global()) {
+        Comment cmnt(masm_, "Global variable");
+        __ ldr(r0, CodeGenerator::GlobalObject());
+        __ push(r0);
+        __ mov(r2, Operand(proxy->name()));
+        Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Initialize));
+        // Use a regular load, not a contextual load, to avoid reference error.

[Kevin Millikin (Chromium), 2009/11/05 10:10:26]

error => errors :)

+        __ Call(ic, RelocInfo::CODE_TARGET);
+        __ str(r0, MemOperand(sp));
+      } else if (proxy != NULL &&
+                 proxy->var()->slot() != NULL &&
+                 proxy->var()->slot()->type() == Slot::LOOKUP) {
+        __ mov(r0, Operand(proxy->name()));
+        __ stm(db_w, sp, cp.bit() | r0.bit());
+        __ CallRuntime(Runtime::kLoadContextSlotNoReferenceError, 2);
+        __ push(r0);
+      } else {
+        // This expression cannot throw a reference error at the top level.
+        Visit(expr->expression());
+      }
+
+      __ CallRuntime(Runtime::kTypeof, 1);
+      Move(expr->context(), r0);
+      break;
+    }
+
     default:
       UNREACHABLE();
   }
 }
 
 
 void FastCodeGenerator::VisitCountOperation(CountOperation* expr) {
   Comment cmnt(masm_, "[ CountOperation");
   VariableProxy* proxy = expr->expression()->AsVariableProxy();
   ASSERT(proxy->AsVariable() != NULL);
@@ skipping 274 matching lines @@
   true_label_ = saved_true;
   false_label_ = saved_false;
   // Convert current context to test context: End post-test code.
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal