[turbofan] Treat uninitialized source positions as unknown.

src/compiler/pipeline.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/pipeline.h"
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
 
 #include "src/base/adapters.h"
@@ skipping 470 matching lines @@
       data->set_compilation_failed();
     }
   }
 };
 
 
 struct ContextSpecializerPhase {
   static const char* phase_name() { return "context specializing"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
-    SourcePositionTable::Scope pos(data->source_positions(),
-                                   SourcePosition::Unknown());
     JSContextSpecializer spec(data->jsgraph());
     GraphReducer graph_reducer(data->graph(), temp_zone);
     AddReducer(data, &graph_reducer, &spec);
     graph_reducer.ReduceGraph();
   }
 };
 
 
 struct InliningPhase {
   static const char* phase_name() { return "inlining"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
-    SourcePositionTable::Scope pos(data->source_positions(),
-                                   SourcePosition::Unknown());
     GraphReducer graph_reducer(data->graph(), temp_zone);
     JSInliner inliner(&graph_reducer, data->info()->is_inlining_enabled()
                                           ? JSInliner::kGeneralInlining
                                           : JSInliner::kBuiltinsInlining,
                       temp_zone, data->info(), data->jsgraph());
     AddReducer(data, &graph_reducer, &inliner);
     graph_reducer.ReduceGraph();
   }
 };
 
 
 struct TyperPhase {
   static const char* phase_name() { return "typer"; }
 
   void Run(PipelineData* data, Zone* temp_zone) { data->typer()->Run(); }
 };
 
 
 struct OsrDeconstructionPhase {
   static const char* phase_name() { return "OSR deconstruction"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
-    SourcePositionTable::Scope pos(data->source_positions(),
-                                   SourcePosition::Unknown());
     OsrHelper osr_helper(data->info());
     osr_helper.Deconstruct(data->jsgraph(), data->common(), temp_zone);
   }
 };
 
 
 struct JSTypeFeedbackPhase {
   static const char* phase_name() { return "type feedback specializing"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
-    SourcePositionTable::Scope pos(data->source_positions(),
-                                   SourcePosition::Unknown());
     Handle<Context> native_context(data->info()->context()->native_context());
     TypeFeedbackOracle oracle(data->isolate(), temp_zone,
                               data->info()->unoptimized_code(),
                               data->info()->feedback_vector(), native_context);
     GraphReducer graph_reducer(data->graph(), temp_zone);
     Handle<GlobalObject> global_object = Handle<GlobalObject>::null();
     if (data->info()->has_global_object()) {
       global_object =
           Handle<GlobalObject>(data->info()->global_object(), data->isolate());
     }
     // TODO(titzer): introduce a specialization mode/flags enum to control
     // specializing to the global object here.
     JSTypeFeedbackSpecializer specializer(
         data->jsgraph(), data->js_type_feedback(), &oracle, global_object,
         data->info()->dependencies());
     AddReducer(data, &graph_reducer, &specializer);
     graph_reducer.ReduceGraph();
   }
 };
 
 
 struct TypedLoweringPhase {
   static const char* phase_name() { return "typed lowering"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
-    SourcePositionTable::Scope pos(data->source_positions(),
-                                   SourcePosition::Unknown());
     LoadElimination load_elimination;
     JSBuiltinReducer builtin_reducer(data->jsgraph());
     JSTypedLowering typed_lowering(data->jsgraph(), temp_zone);
     JSIntrinsicLowering intrinsic_lowering(data->jsgraph());
     SimplifiedOperatorReducer simple_reducer(data->jsgraph());
     CommonOperatorReducer common_reducer(data->jsgraph());
     GraphReducer graph_reducer(data->graph(), temp_zone);
     AddReducer(data, &graph_reducer, &builtin_reducer);
     AddReducer(data, &graph_reducer, &typed_lowering);
     AddReducer(data, &graph_reducer, &intrinsic_lowering);
     AddReducer(data, &graph_reducer, &load_elimination);
     AddReducer(data, &graph_reducer, &simple_reducer);
     AddReducer(data, &graph_reducer, &common_reducer);
     graph_reducer.ReduceGraph();
   }
 };
 
 
 struct SimplifiedLoweringPhase {
   static const char* phase_name() { return "simplified lowering"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
-    SourcePositionTable::Scope pos(data->source_positions(),
-                                   SourcePosition::Unknown());
     SimplifiedLowering lowering(data->jsgraph(), temp_zone,
                                 data->source_positions());
     lowering.LowerAllNodes();
     ValueNumberingReducer vn_reducer(temp_zone);
     SimplifiedOperatorReducer simple_reducer(data->jsgraph());
     MachineOperatorReducer machine_reducer(data->jsgraph());
     CommonOperatorReducer common_reducer(data->jsgraph());
     GraphReducer graph_reducer(data->graph(), temp_zone);
     AddReducer(data, &graph_reducer, &vn_reducer);
     AddReducer(data, &graph_reducer, &simple_reducer);
     AddReducer(data, &graph_reducer, &machine_reducer);
     AddReducer(data, &graph_reducer, &common_reducer);
     graph_reducer.ReduceGraph();
   }
 };
 
 
 struct ControlFlowOptimizationPhase {
   static const char* phase_name() { return "control flow optimization"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
-    SourcePositionTable::Scope pos(data->source_positions(),
-                                   SourcePosition::Unknown());
     ControlFlowOptimizer optimizer(data->jsgraph(), temp_zone);
     optimizer.Optimize();
   }
 };
 
 
 struct ChangeLoweringPhase {
   static const char* phase_name() { return "change lowering"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
-    SourcePositionTable::Scope pos(data->source_positions(),
-                                   SourcePosition::Unknown());
     ValueNumberingReducer vn_reducer(temp_zone);
     SimplifiedOperatorReducer simple_reducer(data->jsgraph());
     ChangeLowering lowering(data->jsgraph());
     MachineOperatorReducer machine_reducer(data->jsgraph());
     CommonOperatorReducer common_reducer(data->jsgraph());
     GraphReducer graph_reducer(data->graph(), temp_zone);
     AddReducer(data, &graph_reducer, &vn_reducer);
     AddReducer(data, &graph_reducer, &simple_reducer);
     AddReducer(data, &graph_reducer, &lowering);
     AddReducer(data, &graph_reducer, &machine_reducer);
     AddReducer(data, &graph_reducer, &common_reducer);
     graph_reducer.ReduceGraph();
   }
 };
 
 
 struct EarlyControlReductionPhase {
   static const char* phase_name() { return "early control reduction"; }
   void Run(PipelineData* data, Zone* temp_zone) {
-    SourcePositionTable::Scope pos(data->source_positions(),
-                                   SourcePosition::Unknown());
     ControlReducer::ReduceGraph(temp_zone, data->jsgraph(), 0);
   }
 };
 
 
 struct LateControlReductionPhase {
   static const char* phase_name() { return "late control reduction"; }
   void Run(PipelineData* data, Zone* temp_zone) {
-    SourcePositionTable::Scope pos(data->source_positions(),
-                                   SourcePosition::Unknown());
     ControlReducer::ReduceGraph(temp_zone, data->jsgraph(), 0);
   }
 };
 
 
 struct StressLoopPeelingPhase {
   static const char* phase_name() { return "stress loop peeling"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
-    SourcePositionTable::Scope pos(data->source_positions(),
-                                   SourcePosition::Unknown());
     // Peel the first outer loop for testing.
     // TODO(titzer): peel all loops? the N'th loop? Innermost loops?
     LoopTree* loop_tree = LoopFinder::BuildLoopTree(data->graph(), temp_zone);
     if (loop_tree != NULL && loop_tree->outer_loops().size() > 0) {
       LoopPeeler::Peel(data->graph(), data->common(), loop_tree,
                        loop_tree->outer_loops()[0], temp_zone);
     }
   }
 };
 
 
 struct GenericLoweringPhase {
   static const char* phase_name() { return "generic lowering"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
-    SourcePositionTable::Scope pos(data->source_positions(),
-                                   SourcePosition::Unknown());
     JSGenericLowering generic(data->info()->is_typing_enabled(),
                               data->jsgraph());
     SelectLowering select(data->jsgraph()->graph(), data->jsgraph()->common());
     TailCallOptimization tco(data->common(), data->graph());
     GraphReducer graph_reducer(data->graph(), temp_zone);
     AddReducer(data, &graph_reducer, &generic);
     AddReducer(data, &graph_reducer, &select);
     // TODO(turbofan): TCO is currently limited to stubs.
     if (data->info()->IsStub()) AddReducer(data, &graph_reducer, &tco);
     graph_reducer.ReduceGraph();
@@ skipping 649 matching lines @@
     tcf << AsC1VRegisterAllocationData("CodeGen",
                                        data->register_allocation_data());
   }
 
   data->DeleteRegisterAllocationZone();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8