[Bug fortran/20923] gfortran slow for large array constructors

[jvdelisle at gcc dot gnu dot org]

------- Comment #22 from jvdelisle at gcc dot gnu dot org  2009-11-30 03:59 -------
Ok, if I back up one step and leave the error message in trans-array.c and use
gfc_fatal_error we get a usable patch.  One thing this is showing is that the
expansion is being done in the parsing/matching phase of compilation and also
in the resolution phase.  I do not yet understand why the ICE is triggered
after the error: (with the changes I have made elsewhere.)

          if (c->iterator)
            {
              /* Problems occur when we get something like
                 integer :: a(lots) = (/(i, i=1, lots)/)  */
              gfc_error_now ("The number of elements in the array constructor "
                              "at %L requires an increase of the allowed %d "
                              "upper limit.  See -fmax-array-constructor "
                              "option", &expr->where,
                              gfc_option.flag_max_array_constructor);
              return NULL_TREE;
            }


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20923