Make Bigint instances immutable by removing all setters.

runtime/vm/flow_graph_builder.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/flow_graph_builder.h"
 
 #include "lib/invocation_mirror.h"
 #include "vm/ast_printer.h"
 #include "vm/bit_vector.h"
 #include "vm/class_finalizer.h"
@@ skipping 3281 matching lines @@
         Value* receiver = Bind(BuildLoadThisVar(node->scope()));
         LoadFieldInstr* load = new(I) LoadFieldInstr(
             receiver,
             Bigint::digits_offset(),
             Type::ZoneHandle(I, Type::DynamicType()),
             node->token_pos());
         load->set_result_cid(kTypedDataUint32ArrayCid);
         load->set_recognized_kind(kind);
         return ReturnDefinition(load);
       }
-      case MethodRecognizer::kBigint_setDigits: {
-        Value* receiver = Bind(BuildLoadThisVar(node->scope()));
-        LocalVariable* value_var =
-            node->scope()->LookupVariable(Symbols::Value(), true);
-        ASSERT(value_var != NULL);
-        Value* value = Bind(new(I) LoadLocalInstr(*value_var));
-        StoreInstanceFieldInstr* store = new(I) StoreInstanceFieldInstr(
-            Bigint::digits_offset(),
-            receiver,
-            value,
-            kEmitStoreBarrier,
-            node->token_pos());
-        Do(store);
-        ConstantInstr* null_const = new(I) ConstantInstr(
-            Object::ZoneHandle(I, Object::null()));
-        return ReturnDefinition(null_const);
-      }
       case MethodRecognizer::kBigint_getUsed: {
         Value* receiver = Bind(BuildLoadThisVar(node->scope()));
         LoadFieldInstr* load = new(I) LoadFieldInstr(
             receiver,
             Bigint::used_offset(),
             Type::ZoneHandle(I, Type::SmiType()),
             node->token_pos());
         load->set_result_cid(kSmiCid);
         load->set_recognized_kind(kind);
         return ReturnDefinition(load);
       }
-      case MethodRecognizer::kBigint_setUsed: {
-        Value* receiver = Bind(BuildLoadThisVar(node->scope()));
-        LocalVariable* value_var =
-            node->scope()->LookupVariable(Symbols::Value(), true);
-        ASSERT(value_var != NULL);
-        Value* value = Bind(new(I) LoadLocalInstr(*value_var));
-        StoreInstanceFieldInstr* store = new(I) StoreInstanceFieldInstr(
-            Bigint::used_offset(),
-            receiver,
-            value,
-            kNoStoreBarrier,
-            node->token_pos());
-        Do(store);
-        ConstantInstr* null_const = new(I) ConstantInstr(
-            Object::ZoneHandle(I, Object::null()));
-        return ReturnDefinition(null_const);
-      }
       case MethodRecognizer::kBigint_getNeg: {
         Value* receiver = Bind(BuildLoadThisVar(node->scope()));
         LoadFieldInstr* load = new(I) LoadFieldInstr(
             receiver,
             Bigint::neg_offset(),
             Type::ZoneHandle(I, Type::BoolType()),
             node->token_pos());
         load->set_result_cid(kBoolCid);
         load->set_recognized_kind(kind);
         return ReturnDefinition(load);
       }
-      case MethodRecognizer::kBigint_setNeg: {
-        Value* receiver = Bind(BuildLoadThisVar(node->scope()));
-        LocalVariable* value_var =
-            node->scope()->LookupVariable(Symbols::Value(), true);
-        ASSERT(value_var != NULL);
-        Value* value = Bind(new(I) LoadLocalInstr(*value_var));
-        StoreInstanceFieldInstr* store = new(I) StoreInstanceFieldInstr(
-            Bigint::neg_offset(),
-            receiver,
-            value,
-            kEmitStoreBarrier,
-            node->token_pos());
-        Do(store);
-        ConstantInstr* null_const = new(I) ConstantInstr(
-            Object::ZoneHandle(I, Object::null()));
-        return ReturnDefinition(null_const);
-      }
       default:
         break;
     }
   }
   InlineBailout("EffectGraphVisitor::VisitNativeBodyNode");
   NativeCallInstr* native_call = new(I) NativeCallInstr(node);
   ReturnDefinition(native_call);
 }
 
 
@@ skipping 926 matching lines @@
   Report::MessageF(Report::kBailout,
                    Script::Handle(function.script()),
                    function.token_pos(),
                    "FlowGraphBuilder Bailout: %s %s",
                    String::Handle(function.name()).ToCString(),
                    reason);
   UNREACHABLE();
 }
 
 }  // namespace dart