diff -r 98f3af397705 -r 46f6f063b272 src/share/vm/c1/c1_Compilation.hpp
--- a/src/share/vm/c1/c1_Compilation.hpp	Wed Mar 20 17:04:45 2013 -0700
+++ b/src/share/vm/c1/c1_Compilation.hpp	Thu Mar 21 09:27:54 2013 +0100
@@ -26,8 +26,10 @@
 #define SHARE_VM_C1_C1_COMPILATION_HPP
 
 #include "ci/ciEnv.hpp"
+#include "ci/ciMethodData.hpp"
 #include "code/exceptionHandlerTable.hpp"
 #include "memory/resourceArea.hpp"
+#include "runtime/deoptimization.hpp"
 
 class CompilationResourceObj;
 class XHandlers;
@@ -85,6 +87,7 @@
   LinearScan*        _allocator;
   CodeOffsets        _offsets;
   CodeBuffer         _code;
+  bool               _has_access_indexed;
 
   // compilation helpers
   void initialize();
@@ -140,6 +143,7 @@
   C1_MacroAssembler* masm() const                { return _masm; }
   CodeOffsets* offsets()                         { return &_offsets; }
   Arena* arena()                                 { return _arena; }
+  bool has_access_indexed()                      { return _has_access_indexed; }
 
   // Instruction ids
   int get_next_id()                              { return _next_id++; }
@@ -154,6 +158,7 @@
   void set_has_fpu_code(bool f)                  { _has_fpu_code = f; }
   void set_has_unsafe_access(bool f)             { _has_unsafe_access = f; }
   void set_would_profile(bool f)                 { _would_profile = f; }
+  void set_has_access_indexed(bool f)            { _has_access_indexed = f; }
   // Add a set of exception handlers covering the given PC offset
   void add_exception_handlers_for_pco(int pco, XHandlers* exception_handlers);
   // Statistics gathering
@@ -233,6 +238,14 @@
     return env()->comp_level() == CompLevel_full_profile &&
       C1UpdateMethodData && C1ProfileCheckcasts;
   }
+
+  // will compilation make optimistic assumptions that might lead to
+  // deoptimization and that the runtime will account for?
+  bool is_optimistic() const                             {
+    return !TieredCompilation &&
+      (RangeCheckElimination || UseLoopInvariantCodeMotion) &&
+      method()->method_data()->trap_count(Deoptimization::Reason_none) == 0;
+  }
 };