IJ15498: INTERNAL COMPILER ERROR in XL C/C++ for AIX, V16.1 when compiling with xlc -O

APAR status

• Closed as program error.

Error description

• INTERNAL COMPILER ERROR occurs in V16.1 when compiling the
  following test case with xlc -O
  
  ----------------------------------------------------------------
  1500-004: (U) INTERNAL COMPILER ERROR while compiling g@AF4_1.
  Compilation ended.  Co tact your Service Representative and
  provide the following information: GRARNN: gr595 is  sed before
  it is defined. For more information visit:
  http://www.ibm.com/support/docview.
  wss?uid=swg21110810
  ================================================================
  ====TESTCASE:
  
  int a;
  int b;
  int f(void);
  void d(int e) {
    if (e) {
      f();
      if (b)
          ;
    }
  }
  void g(void) {
    d(a);
    if (a)
      a = 0;
  }
  

Local fix

• N/A
  

Problem summary

• USERS AFFECTED:
  Clients who use the  XL C/C++ for AIX, V16.1 compiler and use
  the -O option may be affected by this issue.
  
  PROBLEM DESCRIPTION:
  An Internal Compiler Error occurs because an internal register
  is used before defined
  

Problem conclusion

• An internal optimization bug was fixed in 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++ FOR AI

• Fixed component ID

  5725C7200

Applicable component levels