Add deopt info to code object and print it

runtime/vm/flow_graph_compiler_x64.cc

Index: runtime/vm/flow_graph_compiler_x64.cc
===================================================================
--- runtime/vm/flow_graph_compiler_x64.cc	(revision 10302)
+++ runtime/vm/flow_graph_compiler_x64.cc	(working copy)
@@ -24,7 +24,8 @@
 DECLARE_FLAG(bool, trace_functions);
 
 
-void DeoptimizationStub::GenerateCode(FlowGraphCompiler* compiler) {
+void DeoptimizationStub::GenerateCode(FlowGraphCompiler* compiler,
+                                      intptr_t stub_ix) {
   Assembler* assem = compiler->assembler();
 #define __ assem->
   __ Comment("Deopt stub for id %d", deopt_id_);
@@ -64,6 +65,7 @@
   }
 
   if (compiler->IsLeaf()) {
+    __ Comment("Leaf method, lazy PC marker setup");
     Label L;
     __ call(&L);
     const intptr_t offset = assem->CodeSize();
@@ -75,10 +77,13 @@
   }
   __ movq(RAX, Immediate(Smi::RawValue(reason_)));
   __ call(&StubCode::DeoptimizeLabel());
-  compiler->AddCurrentDescriptor(PcDescriptors::kOther,
-                                 deopt_id_,
-                                 deopt_token_pos_,
-                                 try_index_);
+  const intptr_t deopt_info_index = stub_ix;
+  compiler->pc_descriptors_list()-> AddDeoptInfo(
+      compiler->assembler()->CodeSize(),
+      deopt_id_,
+      deopt_token_pos_,
+      deopt_info_index);
+  __ int3();
 #undef __
 }