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IV26851: INCORRECT BRANCH CONDITION GENERATED FOR VERSIONED LOOP

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Error Message: N/A
.
Stack Trace: N/A
.

Local fix

  • This issue can be avoided using the -Xjit:disableLoopVersioner
option. This option may cause a noticeable performance
degradation.

Problem summary

  • The JIT compiler was performing a loop optimization that
resulted in an incorrect branch condition being generated in
compiled code, resulting in the unintended execution of either a
fast or slow loop.

Problem conclusion

  • This defect will be fixed in:
7.0.0 SR1
6.0.1 SR2
6.0.0 SR11
5.0.0 SR14
.
The JIT compiler has been amended to prevent this incorrect
behaviour.

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV26851
    • 

  • Reported component name
    JAVA 5 JIT
    • 

  • Reported component ID
    620500124
    • 

  • Reported release
    500
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2012-08-22
    • 

  • Closed date
    2012-08-22
    • 

  • Last modified date
    2012-09-06
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    
IV19961
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    • 



Fix information


    

  • Fixed component name
    JAVA 5 JIT
    • 

  • Fixed component ID
    620500124
    • 



Applicable component levels


    

  • R500  PSN
       UP
    • 








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            06 September 2012
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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