--- old/src/share/vm/opto/parse2.cpp	2015-01-16 19:37:33.000000000 +0300
+++ new/src/share/vm/opto/parse2.cpp	2015-01-16 19:37:33.000000000 +0300
@@ -37,6 +37,7 @@
 #include "opto/matcher.hpp"
 #include "opto/memnode.hpp"
 #include "opto/mulnode.hpp"
+#include "opto/opaquenode.hpp"
 #include "opto/parse.hpp"
 #include "opto/runtime.hpp"
 #include "runtime/deoptimization.hpp"
@@ -767,28 +768,45 @@
 // Try to gather dynamic branch prediction behavior.  Return a probability
 // of the branch being taken and set the "cnt" field.  Returns a -1.0
 // if we need to use static prediction for some reason.
-float Parse::dynamic_branch_prediction(float &cnt) {
+float Parse::dynamic_branch_prediction(float &cnt, BoolTest::mask btest, Node* test) {
   ResourceMark rm;
 
   cnt  = COUNT_UNKNOWN;
 
-  // Use MethodData information if it is available
-  // FIXME: free the ProfileData structure
-  ciMethodData* methodData = method()->method_data();
-  if (!methodData->is_mature())  return PROB_UNKNOWN;
-  ciProfileData* data = methodData->bci_to_data(bci());
-  if (!data->is_JumpData())  return PROB_UNKNOWN;
-
-  // get taken and not taken values
-  int     taken = data->as_JumpData()->taken();
+  int     taken = 0;
   int not_taken = 0;
-  if (data->is_BranchData()) {
-    not_taken = data->as_BranchData()->not_taken();
-  }
 
-  // scale the counts to be commensurate with invocation counts:
-  taken = method()->scale_count(taken);
-  not_taken = method()->scale_count(not_taken);
+  if (method()->ignore_profile()) {
+    if (btest == BoolTest::eq && test->is_Cmp() && test->in(1)->Opcode() == Op_Opaque4) {
+      Opaque4Node* opq = (Opaque4Node*)test->in(1);
+      taken = opq->taken();
+      not_taken = opq->not_taken();
+      opq->consume();
+    } else {
+      // No profile info. Be conservative.
+      int cnt = method()->interpreter_invocation_count();
+      taken = cnt / 2;
+      not_taken = cnt - taken;
+    }
+  } else {
+    // Use MethodData information if it is available
+    // FIXME: free the ProfileData structure
+    ciMethodData* methodData = method()->method_data();
+    if (!methodData->is_mature())  return PROB_UNKNOWN;
+    ciProfileData* data = methodData->bci_to_data(bci());
+    if (!data->is_JumpData())  return PROB_UNKNOWN;
+
+    // get taken and not taken values
+    taken = data->as_JumpData()->taken();
+    not_taken = 0;
+    if (data->is_BranchData()) {
+      not_taken = data->as_BranchData()->not_taken();
+    }
+
+    // scale the counts to be commensurate with invocation counts:
+    taken = method()->scale_count(taken);
+    not_taken = method()->scale_count(not_taken);
+  }
 
   // Give up if too few (or too many, in which case the sum will overflow) counts to be meaningful.
   // We also check that individual counters are positive first, overwise the sum can become positive.
@@ -841,8 +859,9 @@
 //-----------------------------branch_prediction-------------------------------
 float Parse::branch_prediction(float& cnt,
                                BoolTest::mask btest,
-                               int target_bci) {
-  float prob = dynamic_branch_prediction(cnt);
+                               int target_bci,
+                               Node* test) {
+  float prob = dynamic_branch_prediction(cnt, btest, test);
   // If prob is unknown, switch to static prediction
   if (prob != PROB_UNKNOWN)  return prob;
 
@@ -932,7 +951,7 @@
   Block* next_block   = successor_for_bci(iter().next_bci());
 
   float cnt;
-  float prob = branch_prediction(cnt, btest, target_bci);
+  float prob = branch_prediction(cnt, btest, target_bci, c);
   if (prob == PROB_UNKNOWN) {
     // (An earlier version of do_ifnull omitted this trap for OSR methods.)
 #ifndef PRODUCT
@@ -1013,7 +1032,7 @@
   Block* next_block   = successor_for_bci(iter().next_bci());
 
   float cnt;
-  float prob = branch_prediction(cnt, btest, target_bci);
+  float prob = branch_prediction(cnt, btest, target_bci, c);
   float untaken_prob = 1.0 - prob;
 
   if (prob == PROB_UNKNOWN) {