[Bug tree-optimization/38632] New: ICE with try/catch and -ftree-parallelize-loops

["reichelt at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

The following valid code snippet triggers an ICE when compiled with
"-O -ftree-parallelize-loops=2":

========================================
void foo();

void bar(int n, char *p)
{
  try
  {
    foo();
    ++n;
    foo();
    for (int i = 0; i < n-1; ++i)
      p[i] = 0;
  }
  catch (...)
  {
    for (int i = 0; i < n; ++i)
      p[i] = 0;
  }
}
========================================

Unable to coalesce ssa_names 1 and 5 which are marked as MUST COALESCE.
n_1(ab) and  n_5(ab)
bug26.cc: In function 'void bar(int, char*)':
bug26.cc:8: internal compiler error: SSA corruption
Please submit a full bug report, [etc.]

The ICE happens since GCC 4.3.0 when "-ftree-parallelize-loops" was
introduced.


-- 
           Summary: ICE with try/catch and -ftree-parallelize-loops
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code, monitored
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: reichelt at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38632