src/share/vm/opto/subnode.cpp

rev 10168 : 8003585: strength reduce or eliminate range checks for power-of-two sized arrays
Summary: change ((x & m) u<= m) to always true and ((x & (m - 1)) u< m) into (m > 0)
Reviewed-by: kvn, roland
rev 10222 : 8149745: C2 should optimize long accumulations in a counted loop
summary: Look for parallel iv for long adds
Reviewed-by:

*** 109,118 ****
--- 109,129 ----
    const Type* t2 = phase->type(in(2));
    return sub(t1,t2);            // Local flavor of type subtraction
  
  }
  
+ SubNode* SubNode::make(BasicType bt, Node *in1, Node *in2) {
+   switch(bt) {
+   case T_INT:         return new SubINode(in1, in2);
+   case T_LONG:        return new SubLNode(in1, in2);
+   case T_FLOAT:       return new SubFNode(in1, in2);
+   case T_DOUBLE:      return new SubDNode(in1, in2);
+   }
+   fatal("Bad basic type %s", type2name(bt));
+   return NULL;
+ }
+ 
  //=============================================================================
  
  //------------------------------Helper function--------------------------------
  static bool ok_to_convert(Node* inc, Node* iv) {
      // Do not collapse (x+c0)-y if "+" is a loop increment, because the