[Bug tree-optimization/18472] New: TREE_OPERAND (t, 1) is referenced for t being GOTO_EXPR

[kazu at cs dot umass dot edu]

tree-if-conv.c:tree_if_convert_stmt uses TREE_OPERAND (t, 1)
for t being GOTO_EXPR like so:

    case GOTO_EXPR:
      /* Unconditional goto */
      add_to_predicate_list (bb_for_stmt (TREE_OPERAND (t, 1)), cond);
      bsi_remove (bsi);
      cond = NULL_TREE;
      break;

GOTO_EXPR has only one operand, so TREE_OPERAND (t, 1) is wrong.

Also, nonlocal gotos are represented using __builtin_nonlocal_goto,
computed gotos are represented using GOTO_EXPR, and
all other gotos are represented implicitly.

I don't think the code there is designed to handle computed gotos,
but I could be wrong.

-- 
           Summary: TREE_OPERAND (t, 1) is referenced for t being GOTO_EXPR
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: kazu at cs dot umass dot edu
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18472