IJ13079: INTERNAL COMPILER ERROR IN XLCCODE WITH _Atomic type

XL C/C++ for AIX, V16.1.0.2 Fix Pack (March 2019)

APAR status

• Closed as program error.

Error description

• An internal compiler error is encountered in the xlCcode
  component of the compiler when compiling code containing an
  _Atomic type.  The error may look like:
  
  ================================================================
  
  1500-004: (U) INTERNAL COMPILER ERROR while compiling f.
  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
  
  ================================================================
  

Local fix

Problem summary

• PROBLEM DESCRIPTION:
  An internal compiler array-out-of-bound issue is encountered
  when processing an atomic load operation.  The following test
  case demonstrates the issue:
  
  $ cat reduce.c
  typedef struct A { long long x; } A;
  void f(_Atomic(A) *ap) {
  extern A a;
  a = *ap;
  }
  
  $ xlclang++ -c reduce.c
  1500-004: (U) INTERNAL COMPILER ERROR while compiling f.
  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
  $
  
  
  USERS AFFECTED:
  Users with C11 _Atomic type loads.
  

Problem conclusion

• Code generation issue was corrected and internal error no
  longer occurs.
  

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:

  IJ14863

Fix information

• Fixed component name

  XL C/C++ FOR AI

• Fixed component ID

  5725C7200

Applicable component levels

• RG10 PSY

     UP