Remove all non-function-name uses of CONST_LEGACY

src/full-codegen/arm64/full-codegen-arm64.cc

 // Copyright 2013 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_ARM64
 
 #include "src/ast/scopes.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 739 matching lines @@
 
 
 void FullCodeGenerator::VisitVariableDeclaration(
     VariableDeclaration* declaration) {
   // If it was not possible to allocate the variable at compile time, we
   // need to "declare" it at runtime to make sure it actually exists in the
   // local context.
   VariableProxy* proxy = declaration->proxy();
   VariableMode mode = declaration->mode();
   Variable* variable = proxy->var();
-  bool hole_init = mode == LET || mode == CONST || mode == CONST_LEGACY;
+  bool hole_init = mode == LET || mode == CONST;
 
   switch (variable->location()) {
     case VariableLocation::GLOBAL:
     case VariableLocation::UNALLOCATED:
       globals_->Add(variable->name(), zone());
       globals_->Add(variable->binding_needs_init()
                         ? isolate()->factory()->the_hole_value()
                         : isolate()->factory()->undefined_value(),
                     zone());
       break;
@@ skipping 492 matching lines @@
   // introducing variables.  In those cases, we do not want to
   // perform a runtime call for all variables in the scope
   // containing the eval.
   Variable* var = proxy->var();
   if (var->mode() == DYNAMIC_GLOBAL) {
     EmitLoadGlobalCheckExtensions(proxy, typeof_mode, slow);
     __ B(done);
   } else if (var->mode() == DYNAMIC_LOCAL) {
     Variable* local = var->local_if_not_shadowed();
     __ Ldr(x0, ContextSlotOperandCheckExtensions(local, slow));
-    if (local->mode() == LET || local->mode() == CONST ||
-        local->mode() == CONST_LEGACY) {
+    if (local->mode() == LET || local->mode() == CONST) {
       __ JumpIfNotRoot(x0, Heap::kTheHoleValueRootIndex, done);
-      if (local->mode() == CONST_LEGACY) {
-        __ LoadRoot(x0, Heap::kUndefinedValueRootIndex);
-      } else {  // LET || CONST
-        __ Mov(x0, Operand(var->name()));
-        __ Push(x0);
-        __ CallRuntime(Runtime::kThrowReferenceError);
-      }
+      __ Mov(x0, Operand(var->name()));
+      __ Push(x0);
+      __ CallRuntime(Runtime::kThrowReferenceError);
     }
     __ B(done);
   }
 }
 
 
 void FullCodeGenerator::EmitGlobalVariableLoad(VariableProxy* proxy,
                                                TypeofMode typeof_mode) {
   Variable* var = proxy->var();
   DCHECK(var->IsUnallocatedOrGlobalSlot() ||
@@ skipping 36 matching lines @@
         GetVar(x0, var);
         Label done;
         __ JumpIfNotRoot(x0, Heap::kTheHoleValueRootIndex, &done);
         if (var->mode() == LET || var->mode() == CONST) {
           // Throw a reference error when using an uninitialized let/const
           // binding in harmony mode.
           __ Mov(x0, Operand(var->name()));
           __ Push(x0);
           __ CallRuntime(Runtime::kThrowReferenceError);
           __ Bind(&done);
-        } else {
-          // Uninitialized legacy const bindings are unholed.
-          DCHECK(var->mode() == CONST_LEGACY);
-          __ LoadRoot(x0, Heap::kUndefinedValueRootIndex);
-          __ Bind(&done);
         }
         context()->Plug(x0);
         break;
       }
       context()->Plug(var);
       break;
     }
 
     case VariableLocation::LOOKUP: {
       Label done, slow;
@@ skipping 767 matching lines @@
     Label uninitialized_this;
     MemOperand location = VarOperand(var, x1);
     __ Ldr(x10, location);
     __ JumpIfRoot(x10, Heap::kTheHoleValueRootIndex, &uninitialized_this);
     __ Mov(x0, Operand(var->name()));
     __ Push(x0);
     __ CallRuntime(Runtime::kThrowReferenceError);
     __ bind(&uninitialized_this);
     EmitStoreToStackLocalOrContextSlot(var, location);
 
-  } else if (!var->is_const_mode() ||
-             (var->mode() == CONST && op == Token::INIT)) {
+  } else if (!var->is_const_mode() || op == Token::INIT) {
     if (var->IsLookupSlot()) {
       // Assignment to var.
       __ Push(var->name());
       __ Push(x0);
       __ 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, x1);
       if (FLAG_debug_code && var->mode() == LET && op == Token::INIT) {
         __ Ldr(x10, location);
         __ CompareRoot(x10, Heap::kTheHoleValueRootIndex);
         __ Check(eq, kLetBindingReInitialization);
       }
       EmitStoreToStackLocalOrContextSlot(var, location);
     }
 
-  } else if (var->mode() == CONST_LEGACY && op == Token::INIT) {
-    // Const initializers need a write barrier.
-    DCHECK(!var->IsParameter());  // No const parameters.
-    if (var->IsLookupSlot()) {
-      __ Mov(x1, Operand(var->name()));
-      __ Push(x0, cp, x1);
-      __ CallRuntime(Runtime::kInitializeLegacyConstLookupSlot);
-    } else {
-      DCHECK(var->IsStackLocal() || var->IsContextSlot());
-      Label skip;
-      MemOperand location = VarOperand(var, x1);
-      __ Ldr(x10, location);
-      __ JumpIfNotRoot(x10, Heap::kTheHoleValueRootIndex, &skip);
-      EmitStoreToStackLocalOrContextSlot(var, location);
-      __ Bind(&skip);
-    }
-
   } else {
     DCHECK(var->mode() == CONST_LEGACY && op != Token::INIT);
     if (is_strict(language_mode())) {
       __ CallRuntime(Runtime::kThrowConstAssignError);
     }
     // Silently ignore store in sloppy mode.
   }
 }
 
 
@@ skipping 1877 matching lines @@
   }
 
   return INTERRUPT;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64