src/hotspot/share/opto/library_call.cpp

*** 322,331 ****
--- 322,332 ----
    bool inline_mulAdd();
    bool inline_montgomeryMultiply();
    bool inline_montgomerySquare();
    bool inline_vectorizedMismatch();
    bool inline_fma(vmIntrinsics::ID id);
+   bool inline_character_compare(vmIntrinsics::ID id);
  
    bool inline_profileBoolean();
    bool inline_isCompileConstant();
    void clear_upper_avx() {
  #ifdef X86
*** 865,874 ****
--- 866,881 ----
  
    case vmIntrinsics::_fmaD:
    case vmIntrinsics::_fmaF:
      return inline_fma(intrinsic_id());
  
+   case vmIntrinsics::_isDigit_c:
+   case vmIntrinsics::_isLowerCase_c:
+   case vmIntrinsics::_isUpperCase_c:
+   case vmIntrinsics::_isWhitespace_c:
+     return inline_character_compare(intrinsic_id());
+ 
    default:
      // If you get here, it may be that someone has added a new intrinsic
      // to the list in vmSymbols.hpp without implementing it here.
  #ifndef PRODUCT
      if ((PrintMiscellaneous && (Verbose || WizardMode)) || PrintOpto) {
*** 6553,6562 ****
--- 6560,6621 ----
    }
    set_result(result);
    return true;
  }
  
+ bool LibraryCallKit::inline_character_compare(vmIntrinsics::ID id) {
+   if (!control()->is_Region()) {
+     return false;
+   }
+   RegionNode* r = control()->as_Region();
+ 
+   // argument(0) is receiver
+   Node* codePoint = argument(1);
+   Node* n = NULL;
+ 
+   switch (id) {
+     case vmIntrinsics::_isDigit_c :
+       if (!Matcher::match_rule_supported(Op_DigitC)) {
+         return false;
+       }
+       n = new DigitCNode(0, codePoint);
+       break;
+     case vmIntrinsics::_isLowerCase_c :
+       if (!Matcher::match_rule_supported(Op_LowerCaseC)) {
+         return false;
+       }
+       n = new LowerCaseCNode(0,  codePoint);
+       break;
+     case vmIntrinsics::_isUpperCase_c :
+       if (!Matcher::match_rule_supported(Op_UpperCaseC)) {
+         return false;
+       }
+       n = new UpperCaseCNode(0, codePoint);
+       break;
+     case vmIntrinsics::_isWhitespace_c :
+       if (!Matcher::match_rule_supported(Op_WhitespaceC)) {
+         return false;
+       }
+       n = new WhitespaceCNode(0, codePoint);
+       break;
+     default:
+       fatal_unexpected_iid(id);  
+   }
+ 
+   RegionNode *rgn = new RegionNode(2);
+   PhiNode *phi = new PhiNode(rgn, TypeInt::CHAR);
+ 
+   // Swap current RegionNode with new one
+   Node* new_ctrl = r->in(1);
+   r->del_req(1);
+   rgn->init_req(1, new_ctrl);
+   phi->init_req(1, _gvn.transform(n));
+   set_result(rgn, phi);
+ 
+   return true;
+ }
+ 
  bool LibraryCallKit::inline_profileBoolean() {
    Node* counts = argument(1);
    const TypeAryPtr* ary = NULL;
    ciArray* aobj = NULL;
    if (counts->is_Con()