IV65274: WRONG PROGRAM OUTPUT IF ROUTINE IS INLINED IN SOURCE COMPILED USING ALTIVEC AND IPA.

XL C/C++ for AIX Fix Pack 1 (September 2014 PTF) for 13.1
XL C/C++ for AIX Fix Pack 2 (December 2014 PTF) for 13.1
XL C/C++ for AIX Fix Pack 3 (April 2015 PTF) for 13.1
XL C/C++ for AIX Fix Pack 4 (July 2015 PTF) for 13.1
XL C for AIX Fix Pack 5 (November 2015 Update) for 13.1
XL C/C++ for AIX Fix Pack 5 (November 2015 PTF) for 13.1
XL C/C++ for AIX Fix Pack 6 (February 2016 PTF) for 13.1
XL C for AIX Fix Pack 6 (February 2016 Update) for 13.1
XL C for AIX Fix Pack 7 (May 2016 Update) for 13.1
XL C/C++ for AIX Fix Pack 7 (May 2016 PTF) for 13.1
XL C for AIX Fix Pack 8 (August 2016 Update) for 13.1
XL C/C++ for AIX Fix Pack 8 (August 2016 PTF) for 13.1
XL C for AIX Fix Pack 9 (June 2017 Update) for 13.1
XL C/C++ for AIX Fix Pack 9 (June 2017 PTF) for 13.1
XL C for AIX Fix Pack 10 (February 2018 Update) for 13.1
XL C/C++ for AIX Fix Pack 10 (February 2018 PTF) for 13.1
XL C for AIX Fix Pack 1 (September 2014 PTF) for 13.1
XL C for AIX Fix Pack 2 (December 2014 PTF) for 13.1
XL C for AIX Fix Pack 3 (April 2015 PTF) for 13.1
XL C for AIX Fix Pack 4 (July 2015 PTF) for 13.1
XL C/C++ for AIX Fix Pack 11 (November 2018 PTF) for 13.1
XL C for AIX Fix Pack 11 (November 2018) for 13.1

APAR status

• Closed as program error.

Error description

• Wrong program output if routine is inlined in source compiled
  using Altivec and IPA.
  

Local fix

• If possible avoid explicit cast of vector types to other vector
  types.  Or lower optimization level to avoid using IPA.
  

Problem summary

• USERS AFFECTED:
  Users using altivec in their source and invoking IPA may be
  affected by this issue.
  
  PROBLEM DESCRIPTION:
  IPA is changing the type of a symbol to avoid a conversion, but
  this is causing incorrect behavior when the temporary is being
  used else where.
  

Problem conclusion

• IPA has been changed so that it will not change the type of the
  symbol, but leave the conversion in the code.
  

Temporary fix

Comments

APAR Information

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

  IV65193

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

Fix information

• Fixed component name

  XL C FOR AIX

• Fixed component ID

  5725C7100

Applicable component levels

• RD10 PSY

     UP