Fix how Hydrogen traces inlined functions.

src/crankshaft/hydrogen.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/crankshaft/hydrogen.h"
 
 #include <memory>
 #include <sstream>
 
 #include "src/allocation-site-scopes.h"
@@ skipping 1373 matching lines @@
     if (FLAG_hydrogen_track_positions &&
         !script->source()->IsUndefined(isolate())) {
       CodeTracer::Scope tracing_scope(isolate()->GetCodeTracer());
       Object* source_name = script->name();
       OFStream os(tracing_scope.file());
       os << "--- FUNCTION SOURCE (";
       if (source_name->IsString()) {
         os << String::cast(source_name)->ToCString().get() << ":";
       }
       os << shared->DebugName()->ToCString().get() << ") id{";
-      os << info_->optimization_id() << "," << inlining_id << "} ---\n";
+      os << info_->optimization_id() << "," << inlining_id << "} start{";
+      os << shared->start_position() << "} ---\n";
       {
         DisallowHeapAllocation no_allocation;
         int start = shared->start_position();
         int len = shared->end_position() - start;
         String::SubStringRange source(String::cast(script->source()), start,
                                       len);
         for (const auto& c : source) {
           os << AsReversiblyEscapedUC16(c);
         }
       }
 
       os << "\n--- END ---\n";
     }
   }
 
   if (FLAG_hydrogen_track_positions &&
       inlining_id != SourcePosition::kNotInlined) {
     CodeTracer::Scope tracing_scope(isolate()->GetCodeTracer());
     OFStream os(tracing_scope.file());
     os << "INLINE (" << shared->DebugName()->ToCString().get() << ") id{"
        << info_->optimization_id() << "," << inlining_id << "} AS "
-       << inlining_id << " AT " << position.ScriptOffset() << std::endl;
+       << inlining_id << " AT ";
+    if (position.IsKnown()) {
+      os << "<" << position.InliningId() << ":" << position.ScriptOffset()
+         << ">";
+    } else {
+      os << "<?>";
+    }
+    os << std::endl;
   }
 }
 
 HInstruction* HGraphBuilder::AddInstruction(HInstruction* instr) {
   DCHECK(current_block() != NULL);
   DCHECK(!FLAG_hydrogen_track_positions || position_.IsKnown() ||
          !info_->IsOptimizing());
   current_block()->AddInstruction(instr, source_position());
   if (graph()->IsInsideNoSideEffectsScope()) {
     instr->SetFlag(HValue::kHasNoObservableSideEffects);
@@ skipping 11601 matching lines @@
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8