Reland and fix bug: Don't store redundant compile-type at values.

runtime/vm/flow_graph_compiler_ia32.cc

Index: runtime/vm/flow_graph_compiler_ia32.cc
===================================================================
--- runtime/vm/flow_graph_compiler_ia32.cc	(revision 41847)
+++ runtime/vm/flow_graph_compiler_ia32.cc	(working copy)
@@ -77,6 +77,7 @@
                                                  DeoptInfoBuilder* builder,
                                                  const Array& deopt_table) {
   if (deopt_env_ == NULL) {
+    ++builder->current_info_number_;

[Florian Schneider, 2014/11/20 17:11:14]

My CL corrects the index used in compression of following deopt-infos in this
case, but this code rings alarm bells: We will crash when deoptimizing at an
instruction that has a null-DeoptInfo.

     return DeoptInfo::null();
   }