Use zone when allocating handles in FlowGraphCompiler assembling operations. Add profiling VM tags…

runtime/vm/flow_graph_builder.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/flow_graph_builder.h"
 
 #include "lib/invocation_mirror.h"
 #include "vm/ast_printer.h"
 #include "vm/bit_vector.h"
 #include "vm/class_finalizer.h"
@@ skipping 24 matching lines @@
             "Eliminate type checks when allowed by static type analysis.");
 DEFINE_FLAG(bool, print_ast, false, "Print abstract syntax tree.");
 DEFINE_FLAG(bool, print_scopes, false, "Print scopes of local variables.");
 DEFINE_FLAG(bool, support_debugger, true, "Emit code needed for debugging");
 DEFINE_FLAG(bool, trace_type_check_elimination, false,
             "Trace type check elimination at compile time.");
 DEFINE_FLAG(bool, precompile_collect_closures, false,
             "Collect all closure functions referenced from compiled code.");
 
 DECLARE_FLAG(int, optimization_counter_threshold);
+DECLARE_FLAG(bool, profile_vm);
 DECLARE_FLAG(bool, warn_on_javascript_compatibility);
 DECLARE_FLAG(bool, use_field_guards);
 
 // Quick access to the locally defined zone() method.
 #define Z (zone())
 
 // TODO(srdjan): Allow compiler to add constants as they are encountered in
 // the compilation.
 const double kCommonDoubleConstants[] =
     {-1.0, -0.5, -0.1, 0.0, 0.1, 0.5, 1.0, 2.0, 4.0, 5.0,
@@ skipping 4721 matching lines @@
   exit_ = for_finally_block.exit_;
 }
 
 
 void EffectGraphVisitor::VisitStopNode(StopNode* node) {
   AddInstruction(new(Z) StopInstr(node->message()));
 }
 
 
 FlowGraph* FlowGraphBuilder::BuildGraph() {
+  VMTagScope tagScope(Thread::Current()->isolate(),
+                      VMTag::kCompileFlowGraphBuilderTagId,
+                      FLAG_profile_vm);
   if (FLAG_print_ast) {
     // Print the function ast before IL generation.
     AstPrinter::PrintFunctionNodes(parsed_function());
   }
   if (FLAG_print_scopes) {
     AstPrinter::PrintFunctionScope(parsed_function());
   }
   TargetEntryInstr* normal_entry =
       new(Z) TargetEntryInstr(AllocateBlockId(),
                               CatchClauseNode::kInvalidTryIndex);
@@ skipping 32 matching lines @@
   Report::MessageF(Report::kBailout,
                    Script::Handle(function.script()),
                    function.token_pos(),
                    "FlowGraphBuilder Bailout: %s %s",
                    String::Handle(function.name()).ToCString(),
                    reason);
   UNREACHABLE();
 }
 
 }  // namespace dart