IJ36768: CONDITIONAL EXPR OPTIMIZATION MAY LEAVE DANGLING EH INSTRUMENTATION

APAR status

• Closed as program error.

Error description

• When compiling the following test case, the compiler leads to an
  Internal Compiler Error:
  
  ====TESTCASE:
  $ cat test.cpp
  #include<new>
  
  static const int val = 42;
  
  extern long arr[1];
  
  void foo(const long &a)
  {
    (val == 42) ? 0 : ((void) (new (&arr[0]) long (a)), 0);
  }
  $
  

Local fix

• N/A
  

Problem summary

• USERS AFFECTED:
  Users that have test cases which make use of conditional
  expression with new on either
  the dead true or false side maybe affected by this issue.
  
  PROBLEM DESCRIPTION:
  Dead code elimination fails to mark dead EH state table entries
  removed,
  leading to compiler abend.
  

Problem conclusion

• The fix marks the dead expression EH state table entries
  removed.
  

Temporary fix

Comments

APAR Information

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

  IJ21755

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

Fix information

• Fixed component name

  XL C/C++ FOR AI

• Fixed component ID

  5725C7200

Applicable component levels