Debugger: use debug break slots instead of ICs (except for calls).

src/parser.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.
 
 #include "src/v8.h"
 
 #include "src/api.h"
 #include "src/ast.h"
 #include "src/ast-literal-reindexer.h"
 #include "src/bailout-reason.h"
@@ skipping 3190 matching lines @@
     }
 
     // each = result.value
     {
       Expression* value_literal = factory()->NewStringLiteral(
           ast_value_factory()->value_string(), RelocInfo::kNoPosition);
       Expression* result_proxy = factory()->NewVariableProxy(result);
       Expression* result_value = factory()->NewProperty(
           result_proxy, value_literal, RelocInfo::kNoPosition);
       assign_each = factory()->NewAssignment(Token::ASSIGN, each, result_value,
-                                             each->position());
+                                             RelocInfo::kNoPosition);
     }
 
     for_of->Initialize(each, subject, body,
                        assign_iterator,
                        next_result,
                        result_done,
                        assign_each);
   } else {
     stmt->Initialize(each, subject, body);
   }
@@ skipping 363 matching lines @@
             factory()->NewBlock(NULL, 3, false, RelocInfo::kNoPosition);
 
         auto each_initialization_block =
             factory()->NewBlock(nullptr, 1, true, RelocInfo::kNoPosition);
         {
           DCHECK(parsing_result.declarations.length() == 1);
           DeclarationParsingResult::Declaration decl =
               parsing_result.declarations[0];
           auto descriptor = parsing_result.descriptor;
           descriptor.declaration_pos = RelocInfo::kNoPosition;
+          descriptor.initialization_pos = RelocInfo::kNoPosition;
           decl.initializer = factory()->NewVariableProxy(temp);
 
           PatternRewriter::DeclareAndInitializeVariables(
               each_initialization_block, &descriptor, &decl,
               IsLexicalVariableMode(descriptor.mode) ? &lexical_bindings
                                                      : nullptr,
               CHECK_OK);
         }
 
         body_block->AddStatement(each_initialization_block, zone());
@@ skipping 76 matching lines @@
         Statement* body = ParseSubStatement(NULL, CHECK_OK);
         InitializeForEachStatement(loop, expression, enumerable, body);
         scope_ = saved_scope;
         for_scope->set_end_position(scanner()->location().end_pos);
         for_scope = for_scope->FinalizeBlockScope();
         DCHECK(for_scope == NULL);
         // Parsed for-in loop.
         return loop;
 
       } else {
-        init = factory()->NewExpressionStatement(expression, position());
+        init =
+            factory()->NewExpressionStatement(expression, lhs_location.beg_pos);
       }
     }
   }
 
   // Standard 'for' loop
   ForStatement* loop = factory()->NewForStatement(labels, stmt_pos);
   Target target(&this->target_stack_, loop);
 
   // Parsed initializer at this point.
   // Detect attempts at 'let' declarations in sloppy mode.
@@ skipping 2233 matching lines @@
 Expression* Parser::SpreadCallNew(Expression* function,
                                   ZoneList<v8::internal::Expression*>* args,
                                   int pos) {
   args->InsertAt(0, function, zone());
 
   return factory()->NewCallRuntime(
       ast_value_factory()->reflect_construct_string(), NULL, args, pos);
 }
 }  // namespace internal
 }  // namespace v8