Improve token position for the entry CheckStackoverflowInstr

runtime/vm/intermediate_language.h

 // Copyright (c) 2013, 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.
 
 #ifndef VM_INTERMEDIATE_LANGUAGE_H_
 #define VM_INTERMEDIATE_LANGUAGE_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 2523 matching lines @@
  private:
   Range* constraint_;
   TargetEntryInstr* target_;
 
   DISALLOW_COPY_AND_ASSIGN(ConstraintInstr);
 };
 
 
 class ConstantInstr : public TemplateDefinition<0, NoThrow, Pure> {
  public:
-  explicit ConstantInstr(const Object& value);
+  ConstantInstr(const Object& value,
+                intptr_t token_pos = Scanner::kNoSourcePos);
 
   DECLARE_INSTRUCTION(Constant)
   virtual CompileType ComputeType() const;
 
   virtual Definition* Canonicalize(FlowGraph* flow_graph);
 
   const Object& value() const { return value_; }
 
   virtual void PrintOperandsTo(BufferFormatter* f) const;
 
   virtual bool CanDeoptimize() const { return false; }
 
   virtual void InferRange(RangeAnalysis* analysis, Range* range);
 
   virtual bool AttributesEqual(Instruction* other) const;
 
  private:
   const Object& value_;
+  const intptr_t token_pos_;
 
   DISALLOW_COPY_AND_ASSIGN(ConstantInstr);
 };
 
 
 // Merged ConstantInstr -> UnboxedXXX into UnboxedConstantInstr.
 // TODO(srdjan): Implemented currently for doubles only, should implement
 // for other unboxing instructions.
 class UnboxedConstantInstr : public ConstantInstr {
  public:
@@ skipping 5545 matching lines @@
   LocationSummary* Name::MakeLocationSummary(Zone* zone, bool opt) const {    \
     UNIMPLEMENTED();                                                          \
     return NULL;                                                              \
   }                                                                           \
   void Name::EmitNativeCode(FlowGraphCompiler* compiler) { UNIMPLEMENTED(); }
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_