LI81120: CLANGTANA UNABLE TO TRANSLATE EXTVECTORTYPE

APAR status

• Closed as program error.

Error description

• The compiler produces an Internal Compiler Error when trying to
  compile the following testcase:
  
  
  ===== COMPILE COMMAND:
  xlc -c test.c
  
  ===== TESTCASE:
  $ cat test.c
  int func1(void)
  {
      register __vector unsigned int temp0 = {4,4,4, 4};
      register __vector unsigned int temp1= temp0<<1;
  //{8,8,8,8}
      temp1=temp1 <<1 ;
      return 1;
  }
  
  $
  
  
  ===== ACTUAL OUTPUT:
  $ /opt/ibm/xlC/16.1.1/bin/.orig/xlc: error: 1501-230
  Internal compiler error; please contact your Service
  Representative. For more information visit:
  http://www.ibm.com/support/docview.wss?uid=swg21110810
  $
  
  ===== EXPECTED OUTPUT:
  Should not produce an internal compiler error.
  

Local fix

• N/A
  

Problem summary

• USERS AFFECTED:
  Users who have altivec code such as "v << 1", which
  generates VectorSplat on the integer literal may generate the
  problematic ExtVectorType.
  
  PROBLEM DESCRIPTION:
  Clang AST that generate ExtVectorType will cause the compiler
  frontend to abend.
  

Problem conclusion

• ExtVectorType is a derived type of VectorType, which the
  compiler
  knows how to translate. Enabling the existing translation for
  ExtVectorType
  generates the desired code for the compiler backend.
  

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:

Fix information

• Fixed component name

  XL C/C++ LINUX

• Fixed component ID

  5725C7310

Applicable component levels