[generators] Implement %GeneratorGetSourcePosition.

src/compiler/access-builder.cc

 // Copyright 2014 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.
 
 #include "src/compiler/access-builder.h"
 
 #include "src/contexts.h"
 #include "src/frames.h"
 #include "src/handles-inl.h"
 #include "src/heap/heap.h"
@@ skipping 134 matching lines @@
   FieldAccess access = {kTaggedBase,
                         JSGeneratorObject::kContinuationOffset,
                         Handle<Name>(),
                         type_cache.kSmi,
                         MachineType::AnyTagged(),
                         kNoWriteBarrier};
   return access;
 }
 
 // static
-FieldAccess AccessBuilder::ForJSGeneratorObjectInput() {
-  FieldAccess access = {
-      kTaggedBase, JSGeneratorObject::kInputOffset, Handle<Name>(),
-      Type::Any(), MachineType::AnyTagged(),        kFullWriteBarrier};
+FieldAccess AccessBuilder::ForJSGeneratorObjectInputOrDebugPos() {
+  FieldAccess access = {kTaggedBase,
+                        JSGeneratorObject::kInputOrDebugPosOffset,
+                        Handle<Name>(),
+                        Type::Any(),
+                        MachineType::AnyTagged(),
+                        kFullWriteBarrier};
   return access;
 }
 
 // static
 FieldAccess AccessBuilder::ForJSGeneratorObjectOperandStack() {
   FieldAccess access = {kTaggedBase,
                         JSGeneratorObject::kOperandStackOffset,
                         Handle<Name>(),
                         Type::Internal(),
                         MachineType::AnyTagged(),
@@ skipping 378 matching lines @@
   }
   UNREACHABLE();
   ElementAccess access = {kUntaggedBase, 0, Type::None(), MachineType::None(),
                           kNoWriteBarrier};
   return access;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8