src/hotspot/share/c1/c1_LIRGenerator.cpp

*** 2302,2313 ****
  
    // move values into phi locations
    move_to_phi(x->state());
  
    int lo_key = x->lo_key();
-   int hi_key = x->hi_key();
    int len = x->length();
    LIR_Opr value = tag.result();
  
    if (compilation()->env()->comp_level() == CompLevel_full_profile && UseSwitchProfiling) {
      ciMethod* method = x->state()->scope()->method();
      ciMethodData* md = method->method_data_or_null();
--- 2302,2313 ----
  
    // move values into phi locations
    move_to_phi(x->state());
  
    int lo_key = x->lo_key();
    int len = x->length();
+   assert(lo_key <= (lo_key + (len - 1)), "integer overflow");
    LIR_Opr value = tag.result();
  
    if (compilation()->env()->comp_level() == CompLevel_full_profile && UseSwitchProfiling) {
      ciMethod* method = x->state()->scope()->method();
      ciMethodData* md = method->method_data_or_null();