[turbofan] Treat uninitialized source positions as unknown.

src/compiler/code-generator.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.
 
 #include "src/compiler/code-generator.h"
 
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/pipeline.h"
 
@@ skipping 20 matching lines @@
 
 
 CodeGenerator::CodeGenerator(Frame* frame, Linkage* linkage,
                              InstructionSequence* code, CompilationInfo* info)
     : frame_(frame),
       linkage_(linkage),
       code_(code),
       info_(info),
       labels_(zone()->NewArray<Label>(code->InstructionBlockCount())),
       current_block_(RpoNumber::Invalid()),
-      current_source_position_(SourcePosition::Invalid()),
+      current_source_position_(SourcePosition::Unknown()),
       masm_(info->isolate(), NULL, 0),
       resolver_(this),
       safepoints_(code->zone()),
       handlers_(code->zone()),
       deoptimization_states_(code->zone()),
       deoptimization_literals_(code->zone()),
       translations_(code->zone()),
       last_lazy_deopt_pc_(0),
       jump_tables_(nullptr),
       ools_(nullptr),
@@ skipping 197 matching lines @@
     // Assemble a boolean materialization after this instruction.
     AssembleArchBoolean(instr, condition);
   }
 }
 
 
 void CodeGenerator::AssembleSourcePosition(Instruction* instr) {
   SourcePosition source_position;
   if (!code()->GetSourcePosition(instr, &source_position)) return;
   if (source_position == current_source_position_) return;
-  DCHECK(!source_position.IsInvalid());
   current_source_position_ = source_position;
   if (source_position.IsUnknown()) return;
   int code_pos = source_position.raw();
-  masm()->positions_recorder()->RecordPosition(source_position.raw());
+  masm()->positions_recorder()->RecordPosition(code_pos);
   masm()->positions_recorder()->WriteRecordedPositions();
   if (FLAG_code_comments) {
     Vector<char> buffer = Vector<char>::New(256);
     CompilationInfo* info = this->info();
     int ln = Script::GetLineNumber(info->script(), code_pos);
     int cn = Script::GetColumnNumber(info->script(), code_pos);
     if (info->script()->name()->IsString()) {
       Handle<String> file(String::cast(info->script()->name()));
       base::OS::SNPrintF(buffer.start(), buffer.length(), "-- %s:%d:%d --",
                          file->ToCString().get(), ln, cn);
@@ skipping 388 matching lines @@
     : masm_(gen->masm()), next_(gen->ools_) {
   gen->ools_ = this;
 }
 
 
 OutOfLineCode::~OutOfLineCode() {}
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8