[turbofan] Added --csa-trap-on-node option that helps debugging graph verification issues.

src/compiler/pipeline.cc

Index: src/compiler/pipeline.cc
diff --git a/src/compiler/pipeline.cc b/src/compiler/pipeline.cc
index f5f1880d2bcfe8cdf2a27548af097eb5b290a237..3e97ebe42965ea8921b373fe5b023994b355125c 100644
--- a/src/compiler/pipeline.cc
+++ b/src/compiler/pipeline.cc
@@ -302,7 +302,7 @@ class PipelineData {
     DCHECK(register_allocation_data_ == nullptr);
     register_allocation_data_ = new (register_allocation_zone())
         RegisterAllocationData(config, register_allocation_zone(), frame(),
-                               sequence(), debug_name_.get());
+                               sequence(), debug_name());
   }
 
   void BeginPhaseKind(const char* phase_kind_name) {
@@ -317,6 +317,8 @@ class PipelineData {
     }
   }
 
+  const char* debug_name() const { return debug_name_.get(); }
+
  private:
   Isolate* const isolate_;
   CompilationInfo* const info_;
@@ -1760,28 +1762,27 @@ bool PipelineImpl::ScheduleAndSelectInstructions(Linkage* linkage,
   }
 
   bool verify_stub_graph = data->verify_graph();
-  if (verify_stub_graph || (FLAG_turbo_verify_machine_graph != nullptr &&
-                            (!strcmp(FLAG_turbo_verify_machine_graph, "*") ||
-                             !strcmp(FLAG_turbo_verify_machine_graph,
-                                     data->info()->GetDebugName().get())))) {
+  if (verify_stub_graph ||
+      (FLAG_turbo_verify_machine_graph != nullptr &&
+       (!strcmp(FLAG_turbo_verify_machine_graph, "*") ||
+        !strcmp(FLAG_turbo_verify_machine_graph, data->debug_name())))) {
     if (FLAG_trace_csa_verify) {
       AllowHandleDereference allow_deref;
       CompilationInfo* info = data->info();
       CodeTracer::Scope tracing_scope(info->isolate()->GetCodeTracer());
       OFStream os(tracing_scope.file());
       os << "--------------------------------------------------\n"
-         << "--- Verifying " << info->GetDebugName().get()
-         << " generated by TurboFan\n"
+         << "--- Verifying " << data->debug_name() << " generated by TurboFan\n"
          << "--------------------------------------------------\n"
          << *data->schedule()
          << "--------------------------------------------------\n"
-         << "--- End of " << info->GetDebugName().get()
-         << " generated by TurboFan\n"
+         << "--- End of " << data->debug_name() << " generated by TurboFan\n"
          << "--------------------------------------------------\n";
     }
     Zone temp_zone(data->isolate()->allocator(), ZONE_NAME);
     MachineGraphVerifier::Run(data->graph(), data->schedule(), linkage,
-                              data->info()->IsStub(), &temp_zone);
+                              data->info()->IsStub(), data->debug_name(),
+                              &temp_zone);
   }
 
   data->InitializeInstructionSequence(call_descriptor);