LI76138: INCORRECT VALUE WITH -QNOFOLD

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 the -qnofold option, the compiler is
  generating an incorrect constant value in the resulting object
  file.  The following test case demonstrates this:
  
  
     ===== TEST CASE =====
  
    1  void f(double x)
    2  {
    3   printf("%f\n", x);
    4  }
    5
    6  main()
    7  {
    8   f(0x7fffffffffffffffLL);
    9  }
   10
  
  $ xlc -qlist test.c
  
  $ cat test.lst | grep "8|"
      8| 000074 lfs      C03F0004   1     LFS
                        fp1=+CONSTANT_AREA(gr31,4)
  $ tail -2 test.lst
       |               Constant Area
       | 000000        25660A00 5F000000
  $ ./a.out
  9223372036854775808.000000
  
  $ xlc -qlist test.c -qnofold
  $ cat test.lst | grep "8|"
      8| 000074 lfs      C03F0004   1     LFS
                        fp1=+CONSTANT_AREA(gr31,4)
  $ tail -2 test.lst
       |               Constant Area
       | 000000        25660A00 BF800000   <===Incorrect Value
  $ ./a.out
  -1.000000
  

Local fix

• Do not compile with -qnofold
  

Problem summary

• PROBLEM DESCRIPTION:
  Incorrect result with -qnofold.
  
  USERS AFFECTED:
  Users of -qnofold.
  

Problem conclusion

• The -qnofold option was corrected.
  

Temporary fix

Comments

APAR Information

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

  IZ92928

• 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 IZ92928

     UP06/09/13