IV92277: INTERNAL COMPILER ERROR IN XLCCODE DURING A PDF2 LINK

XL C for AIX Fix Pack 18 (February 2017 Update) for 12.1
XL C/C++ for AIX Fix Pack 18 (February 2017 Update) for 12.1
XL C for AIX Fix Pack 19 (August 2017 Update) for 12.1
XL C/C++ for AIX Fix Pack 19 (August 2017 Update) for 12.1
XL C for AIX Fix Pack 20 (March 2018 Update) for 12.1
XL C/C++ for AIX Fix Pack 20 (March 2018 Update) for 12.1
XL C/C++ for AIX Fix Pack 21 (January 2019 Update) for 12.1
XL C for AIX Fix Pack 21 (January 2019 Update) for 12.1

APAR status

• Closed as program error.

Error description

• When a large test case is undergoing a PDF2 link, it may
  encounter a internal compiler error in the xlCcode component of
  the compiler.
  

Local fix

• N/A
  

Problem summary

• USERS AFFECTED:
  Any users compiling at O2 and up may encounter this issue.
  
  PROBLEM DESCRIPTION:
  Internal memory corruption is possible within the compiler.
  This may result in the compiler returning an internal compiler
  error; or it may result in bad code generation.
  
  In order for this issue to trigger; a certain optimization step
  has to complete exactly as the buffer in question is completely
  full and has not yet resized.
  The following optimization must then try to use that buffer
  before it is resized.
  

Problem conclusion

• This is an internal memory issue within the compiler that has
  been fixed.
  

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:

  IV95470 IV97565

Fix information

• Fixed component name

  XL C FOR AIX

• Fixed component ID

  5725C7100

Applicable component levels

• RC10 PSY

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