IZ83529: ABEND IN XLCCODE AT -O DUE TO AN ASSERT

January 2011 PTF for XL C/C++ for AIX, V11.1
May 2011 PTF for XL C for AIX, V11.1
May 2011 PTF for XL C/C++ for AIX, V11.1
August 2011 PTF for XL C/C++ for AIX, V11.1
November 2011 PTF for XL C/C++ for AIX, V11.1
January 2012 PTF for XL C for AIX, V11.1
January 2012 PTF for XL C/C++ for AIX, V11.1
April 2012 PTF for XL C for AIX, V11.1
April 2012 PTF for XL C/C++ for AIX, V11.1
July 2012 PTF for XL C/C++ for AIX, V11.1
October 2012 PTF for XL C for AIX, V11.1
October 2012 PTF for XL C/C++ for AIX, V11.1
February 2013 PTF for XL C for AIX, V11.1
February 2013 PTF for XL C/C++ for AIX, V11.1
XL C/C++ for AIX Fix Pack 14 (May 2013 PTF) for 11.1
XL C for AIX Fix Pack 14 (May 2013 PTF) for 11.1
XL C/C++ for AIX Fix Pack 15 (August 2013 PTF) for 11.1
XL C for AIX Fix Pack 15 (August 2013 PTF) for 11.1
XL C/C++ for AIX Fix Pack 16 (November 2013 PTF) for 11.1
XL C for AIX Fix Pack 17 (February 2014 PTF) for 11.1
XL C/C++ for AIX Fix Pack 17 (February 2014 PTF) for 11.1
XL C/C++ for AIX Fix Pack 18 (May 2014 PTF) for 11.1
XL C/C++ for AIX Fix Pack 19 (August 2014 PTF) for 11.1
XL C/C++ for AIX Fix Pack 20 (November 2014 PTF) for 11.1
XL C for AIX Fix Pack 21 (April 2015 PTF) for 11.1
XL C/C++ for AIX Fix Pack 21 (April 2015 PTF) for 11.1
XL C/C++ for AIX Fix Pack 22 (September 2015 PTF) for 11.1
XL C for AIX Fix Pack 23 (March 2016 PTF) for 11.1
XL C/C++ for AIX Fix Pack 23 (March 2016 PTF) for 11.1
XL C for AIX Fix Pack 24 (September 2016 PTF) for 11.1
XL C/C++ for AIX Fix Pack 24 (September 2016 PTF) for 11.1
January 2011 PTF for XL C for AIX, V11.1
August 2011 PTF for XL C for AIX, V11.1
November 2011 PTF for XL C for AIX, V11.1
July 2012 PTF for XL C for AIX, V11.1
XL C for AIX Fix Pack 16 (November 2013 PTF) for 11.1
XL C for AIX Fix Pack 18 (May 2014 PTF) for 11.1
XL C for AIX Fix Pack 19 (August 2014 PTF) for 11.1
XL C for AIX Fix Pack 20 (November 2014 PTF) for 11.1
XL C for AIX Fix Pack 22 (September 2015 PTF) for 11.1

APAR status

• Closed as program error.

Error description

• The following test case when compiled at -O causes the compiler
  to produce an Internal Compiler Error:
  
  ======Compile Command:
  xlC_r -c -q64 -O reduced.C
  
  ======Test case:
  
  $ cat reduced.C
  typedef unsigned int           UInt32;
  typedef int                    Int32;
  typedef signed long        IntNative;
  typedef unsigned long      UIntNative;
  
  typedef IntNative              IntPtr;
  typedef UIntNative             lockWord_t;
  
  void logAssertFailed(UInt32 flags,
                         const char  *srcFileName,
                         UInt32 srcLineNumber,
                         Int32  retCode,
                         Int32  reasonCode,
                         UInt32 logRecTag,
                         const char *dataStr,
                         const char *failingExpr);
  
  //22093
  enum MutexName
  {
    UnknownMutex                               = 0x00
  
  };
  
  class BaseMutexClass
  {
  
  
  public:
    MutexName getName() const { return mutexName; };
  
  
    lockWord_t getLockWord() const { return lockWord; };
  
  protected:
  
  
    volatile lockWord_t lockWord;
    MutexName mutexName;
  
  
  };
  
  //23481
  class StaticThMutex : public BaseMutexClass
  {
  };
  
  class StripeGroup
  {
  
    friend class StripeGroupCfg;
  
  
          private:
          void endUseInternal();
  };
  
  //49929
  class StripeGroupCfg
  {
    friend class StripeGroup;
  
  private:
  
  
    static StaticThMutex SGTableMutex;
  };
  
  
  
  
  void StripeGroup::endUseInternal()
  {
    lockWord_t lockWordCopy =
  (&StripeGroupCfg::SGTableMutex)->getLockWord();
    logAssertFailed (0x00000002, "stripeopen.C", 1875,
  (IntPtr)(((Int32)(IntPtr)((void
  *)&StripeGroupCfg::SGTableMutex))), (Int32)lockWordCopy,
  (Int32)((&StripeGroupCfg::SGTableMutex)->getName()), 0, "0x0)");
  }
  $
  
  
  ===== ACTUAL OUTPUT:
  $xlC_r -c -q64 -O reduced.C
      1500-004: (U) INTERNAL COMPILER ERROR while compiling
  StripeGroup::endUseInternal().  Compilation ended.  Contact your
  Service Representative and provide the following information:
  Internal abort. For more information visit:
  http://www.ibm.com/support/docview.wss?uid=swg21110810
  $
  $
  
  ===== EXPECTED OUTPUT:
  Compiler should not produce an Internal Compiler Error.
  

Local fix

• N/A
  

Problem summary

• USERS AFFECTED:
  Users that calculate less than address sized results from
  addresses may be affected by this issue.
  
  PROBLEM DESCRIPTION:
  There was an assert in xlCcdoe for wrong length address that
  caused the compiler to abend.
  

Problem conclusion

• The above assert has been fixed and the compiler no longer
  abends.
  

Temporary fix

Comments

APAR Information

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

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

  LI75779

Fix information

• Fixed component name

  XL C FOR AIX

• Fixed component ID

  5724X1200

Applicable component levels