--- a/hotspot/src/share/vm/c1/c1_Canonicalizer.cpp	Fri May 25 11:39:13 2012 -0700
+++ b/hotspot/src/share/vm/c1/c1_Canonicalizer.cpp	Wed May 30 12:17:07 2012 -0700
@@ -42,6 +42,11 @@
   // the instruction stream (because the instruction list is embedded
   // in the instructions).
   if (canonical() != x) {
+#ifndef PRODUCT
+    if (!x->has_printable_bci()) {
+      x->set_printable_bci(bci());
+    }
+#endif
     if (PrintCanonicalization) {
       PrintValueVisitor do_print_value;
       canonical()->input_values_do(&do_print_value);
@@ -677,8 +682,8 @@
                 return;
             }
           }
+          set_bci(cmp->state_before()->bci());
           set_canonical(canon);
-          set_bci(cmp->state_before()->bci());
         }
       }
     } else if (l->as_InstanceOf() != NULL) {

--- a/hotspot/src/share/vm/c1/c1_Instruction.hpp	Fri May 25 11:39:13 2012 -0700
+++ b/hotspot/src/share/vm/c1/c1_Instruction.hpp	Wed May 30 12:17:07 2012 -0700
@@ -302,8 +302,6 @@
 
   void update_exception_state(ValueStack* state);
 
-  bool has_printable_bci() const                 { return NOT_PRODUCT(_printable_bci != -99) PRODUCT_ONLY(false); }
-
  protected:
   void set_type(ValueType* type) {
     assert(type != NULL, "type must exist");
@@ -392,8 +390,9 @@
   // accessors
   int id() const                                 { return _id; }
 #ifndef PRODUCT
+  bool has_printable_bci() const                 { return _printable_bci != -99; }
   int printable_bci() const                      { assert(has_printable_bci(), "_printable_bci should have been set"); return _printable_bci; }
-  void set_printable_bci(int bci)                { NOT_PRODUCT(_printable_bci = bci;) }
+  void set_printable_bci(int bci)                { _printable_bci = bci; }
 #endif
   int use_count() const                          { return _use_count; }
   int pin_state() const                          { return _pin_state; }
@@ -576,6 +575,7 @@
   , _block(b)
   , _index(index)
   {
+    NOT_PRODUCT(set_printable_bci(Value(b)->printable_bci()));
     if (type->is_illegal()) {
       make_illegal();
     }
@@ -631,7 +631,9 @@
     : Instruction(type)
     , _java_index(index)
     , _declared_type(declared)
-  {}
+  {
+    NOT_PRODUCT(set_printable_bci(-1));
+  }
 
   // accessors
   int java_index() const                         { return _java_index; }