Remove CONST_LEGACY VariableMode

src/full-codegen/mips/full-codegen-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_MIPS
 
 // Note on Mips implementation:
 //
 // The result_register() for mips is the 'v0' register, which is defined
 // by the ABI to contain function return values. However, the first
@@ skipping 2154 matching lines @@
     if (var->binding_needs_init()) {
       Label assign;
       __ lw(a3, location);
       __ LoadRoot(t0, Heap::kTheHoleValueRootIndex);
       __ Branch(&assign, ne, a3, Operand(t0));
       __ li(a3, Operand(var->name()));
       __ push(a3);
       __ CallRuntime(Runtime::kThrowReferenceError);
       __ bind(&assign);
     }
-    if (var->mode() == CONST) {
+    if (var->mode() != CONST) {
+      EmitStoreToStackLocalOrContextSlot(var, location);
+    } else if (var->throw_on_const_assignment(language_mode())) {
       __ CallRuntime(Runtime::kThrowConstAssignError);
-    } else {
-      EmitStoreToStackLocalOrContextSlot(var, location);
     }
   } else if (var->is_this() && var->mode() == CONST && op == Token::INIT) {
     // Initializing assignment to const {this} needs a write barrier.
     DCHECK(var->IsStackAllocated() || var->IsContextSlot());
     Label uninitialized_this;
     MemOperand location = VarOperand(var, a1);
     __ lw(a3, location);
     __ LoadRoot(at, Heap::kTheHoleValueRootIndex);
     __ Branch(&uninitialized_this, eq, a3, Operand(at));
     __ li(a0, Operand(var->name()));
     __ Push(a0);
     __ CallRuntime(Runtime::kThrowReferenceError);
     __ bind(&uninitialized_this);
     EmitStoreToStackLocalOrContextSlot(var, location);
 
-  } else if (!var->is_const_mode() || op == Token::INIT) {
+  } else {
+    DCHECK(var->mode() != CONST || op == Token::INIT);
     if (var->IsLookupSlot()) {
       // Assignment to var.
       __ Push(var->name());
       __ Push(v0);
       __ CallRuntime(is_strict(language_mode())
                          ? Runtime::kStoreLookupSlot_Strict
                          : Runtime::kStoreLookupSlot_Sloppy);
     } else {
       // Assignment to var or initializing assignment to let/const in harmony
       // mode.
       DCHECK((var->IsStackAllocated() || var->IsContextSlot()));
       MemOperand location = VarOperand(var, a1);
       if (FLAG_debug_code && var->mode() == LET && op == Token::INIT) {
         // Check for an uninitialized let binding.
         __ lw(a2, location);
         __ LoadRoot(t0, Heap::kTheHoleValueRootIndex);
         __ Check(eq, kLetBindingReInitialization, a2, Operand(t0));
       }
       EmitStoreToStackLocalOrContextSlot(var, location);
     }
-
-  } else {
-    DCHECK(var->mode() == CONST_LEGACY && op != Token::INIT);
-    if (is_strict(language_mode())) {
-      __ CallRuntime(Runtime::kThrowConstAssignError);
-    }
-    // Silently ignore store in sloppy mode.
   }
 }
 
 
 void FullCodeGenerator::EmitNamedPropertyAssignment(Assignment* expr) {
   // Assignment to a property, using a named store IC.
   Property* prop = expr->target()->AsProperty();
   DCHECK(prop != NULL);
   DCHECK(prop->key()->IsLiteral());
 
@@ skipping 1525 matching lines @@
          reinterpret_cast<uint32_t>(
              isolate->builtins()->OnStackReplacement()->entry()));
   return ON_STACK_REPLACEMENT;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS