LI76148: DATA INITIALIZATION DROPPED WITH -QIPA

XL C/C++ for Linux Fix Pack 9 (August 2013 Update) for 11.1
April 2011 Update for XL C/C++ for Linux, V11.1
July 2011 Update for XL C/C++ for Linux, V11.1
October 2011 Update for XL C/C++ for Linux, V11.1
June 2012 Update for XL C/C++ for Linux, V11.1
October 2012 Update for XL C/C++ for Linux, V11.1
XL C/C++ for Linux Fix Pack 8 (June 2013 Update) for 11.1

APAR status

• Closed as program error.

Error description

• When compiling with -qipa, data initialization seems to drop for
  the following test case:
  
  589: TEST>cat init.c
  int A = 0;
  590: TEST>cat test.c#include <stdio.h>
  extern int A;
  
  struct s {
    int a;
    int b:20;
    int c:32;
  };
  
  struct s S1 = { A,1,2};
  struct s S2 = { A,1,2);
  int main() {
    printf("S1=%d %d %d\n",S1.a, S1.b, S1.c);
    printf("S2=%d %d %d\n",S2.a, S2.b, S2.c);
  
  }
  
  
  
  ======ACTUAL OUTPUT:
  $xlc -+ init.c test.c -qipa
  init.c:
  test.c:
  $./a.out
  S1=0 1 2
  S2=0 0 0
  
  ======EXPECTED OUTPUT:
  $./a.out
  S1=0 1 2
  S2=0 1 2
  

Local fix

• n/a
  

Problem summary

• USERS AFFECTED:
  C++ users of IPA may be affected by this issue.
  
  PROBLEM DESCRIPTION:
  When using options that invoke IPA, the static initializationn
  for bitfields disappear.
  

Problem conclusion

• The compiler has been fixed to ensures that the static
  bitfields are properly initialized in all cases.
  

Temporary fix

Comments

APAR Information

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

  IZ95841

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

Fix information

• Fixed component name

  XL C/C++ FOR LI

• Fixed component ID

  5724X1400

Applicable component levels

• RB10 PSN IZ95841

     UP06/09/13