LI80797: COMPILER ABEND WHEN COMPILING WIHT -QCHECK

APAR status

• Closed as program error.

Error description

• The compiler abends when trying to compile the following
  testcase using -qcheck:
  
  =======TESTCASE:
  $ cat t.cc
  bool color_set[3];
  
  int foo(void)
  {
      color_set[0] = 0;
  }
  
  
  ========COMPILE COMMAND:
  xlc_r -+ t.cc -qcheck -c
  
  
  ========ACTUAL OUTPUT:
  $ xlc_r -+ t.cc -qcheck -c
  Line     ? Displ 00000000000019E0  OD_diff::alloc_opt0(PlObj&,
  CtObj&, FastPlSummary&, Opt0Allocator&, int) const
  Line     ? Displ 000000000000194C  OD_diff::alloc_opt0(PlObj&,
  CtObj&, FastPlSummary&, Opt0Allocator&, int) const
  Line     ? Displ 0000000000000BB4
  OD_regcantbe_when_toc::alloc_opt0(PlObj&, CtObj&,
  FastPlSummary&, Opt0Allocator&, int) const
  Line     ? Displ 00000000000013FC  OpDesc::alloc_opt0(PlObj&,
  CtObj&, Opt0Allocator&) const
  Line     ? Displ 000000000000008C  PlObj::alloc_opt0(CtObj&,
  Opt0Allocator&)
  Line     ? Displ 00000000000001CC  fast_cobra
  Line     ? Displ 0000000000000860  ra
  Line     ? Displ 0000000000000604  regallo
  Line     ? Displ 0000000000000194  IPRA.$invoke_tobey
  Line     ? Displ 0000000000000DD8  xlator_main
  Line     ? Displ 00000000000000D8  main
  xlator_terminate..000000000000005C main..00000000000001AC
  $
  
  
  ========EXPECTED OUTPUT:
  Compiler should no abend
  

Local fix

• N/A
  

Problem summary

• USERS AFFECTED:
  Users compiling at -O0 with -qcheck may be affected by this
  issue.
  
  PROBLEM DESCRIPTION:
  The compiler produces a segfault when compiling certain test
  case at -O0 with -qcheck due to an incorrect compiler
  optimization.
  

Problem conclusion

• The compiler optimization is now 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:

Fix information

• Fixed component name

  XL C/C++ LINUX

• Fixed component ID

  5725C7310

Applicable component levels