src/share/vm/opto/loopopts.cpp

rev 8541 : SIMD: RFR(S): 8085932: Fixing bugs in detecting memory alignments in SuperWord.
Starting to add vector for conditional_move. Preparation only, need to add vector Bool, vector CmpD, vector CmoveD.
rev 8708 : SIMD: CMove update - from c:\Java\openjdk-clone-060315\hotspot\
rev 8709 : Merge
rev 8710 : SIMD: small cleanup
rev 8733 : SIMD: cleanup. src/cpu/x86/vm/x86.ad needs more.
Some !FIXME! are remaining, mostly for second thought
rev 8879 : SIMD: cleanup. Nearly good to push to Oracle.
rev 8926 : Merge
rev 9039 : Merge
rev 9042 : SIMD: added global flag UseCMov (false).
rev 9043 : SIMD: UseCMov is a must and not set alone in do_vector_loop()
rev 9045 : SIMD: fixed if (!def->is_Bool() || def->in(0) != NULL || def->outcnt() != 1) return NULL;,
      Removed if(method()->has_option("BreakAfterCompilation")) os::breakpoint();
rev 9101 : Merge
rev 9138 : Merge
rev 9150 : SIMD: fixing trace/debug printiout

@@ -510,12 +510,15 @@
     if (!out->is_Phi()) continue; // Ignore other control edges, etc
     phis++;
     PhiNode* phi = out->as_Phi();
     BasicType bt = phi->type()->basic_type();
     switch (bt) {
-    case T_FLOAT:
-    case T_DOUBLE: {
+    case T_DOUBLE:
+      if (C->use_cmove()) {
+        continue; //TODO: maybe we want to add some cost
+      }
+    case T_FLOAT: {
       cost += Matcher::float_cmove_cost(); // Could be very expensive
       break;
     }
     case T_LONG: {
       cost += Matcher::long_cmove_cost(); // May encodes as 2 CMOV's

@@ -571,11 +574,11 @@
         if (r_loop == u_loop || r_loop->is_member(u_loop)) {
           used_inside_loop = true;
         }
       }
     }
-  }
+  }//for
   Node* bol = iff->in(1);
   assert(bol->Opcode() == Op_Bool, "");
   int cmp_op = bol->in(1)->Opcode();
   // It is expensive to generate flags from a float compare.
   // Avoid duplicated float compare.

@@ -593,11 +596,12 @@
       infrequent_prob = MAX2(infrequent_prob, (float)BlockLayoutMinDiamondPercentage/110.0f);
     }
   }
   // Check for highly predictable branch.  No point in CMOV'ing if
   // we are going to predict accurately all the time.
-  if (iff->_prob < infrequent_prob ||
+  if (C->use_cmove()) ;//keep going
+  else if (iff->_prob < infrequent_prob ||
       iff->_prob > (1.0f - infrequent_prob))
     return NULL;
 
   // --------------
   // Now replace all Phis with CMOV's