IV40580: INCONSISTENT PROFILING DATA FOUND IN PDF1 AND PDF2

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
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 shows that the compiler is
  unnecessarily ignoring PDF information with the warning message.
  
  508: TEST1>cat test1.C
  #include <cstdio>
  
  int foo1() { return printf("foo1\n");}
  int foo2() { return printf("foo2\n");}
  int foo3() { return printf("foo3\n");}
  int fooN() { return printf("fooN\n");}
  
  int main() {
  
    int i;
  
    for (i=0; i<100000; i++) {
      switch (i%17) {
      case 1: foo1();
        break;
      case 2: foo2();
        break;
      case 3: foo3();
        break;
      case 18:
        goto bye;
      default: fooN();
      }
    }
   bye:
    return 0;
  }
  509: TEST1>xlC -qpdf1 -O test1.C
  510: TEST1>./a.out >/dev/null
  511: TEST1>xlC -qpdf2 -qnoipa -O test1.C
  1586-475 (W) New definition of function "main" is inconsistent
  with profiling data found in file "._pdf" from the pdf1 phase.
  Source files and/or compilation options may differ between the
  pdf1 and pdf2 phases. PDF Information will be ignored for
  function "main".
  

Local fix

• Use -qxflag=nunsswe
  

Problem summary

• PROBLEM DESCRIPTION: The synchronization point between PDF1
  compile and PDF2(NOIPA) compile is different, which causes the
  compiler to falsely identify 'main' as a modified function (ie.
  it thinks the source has changed for that function).
  
  USERS AFFECTED: Users of Compile-time PDF.
  

Problem conclusion

• The problem is fixed. Apply available service.
  

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:

  IV49630 LI77643

Fix information

• Fixed component name

  XL C FOR AIX

• Fixed component ID

  5724X1200

Applicable component levels