[Bug fortran/81827] Large compile time with derived-type rrays

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81827

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Aug 17 10:04:04 2017
New Revision: 251143

URL: https://gcc.gnu.org/viewcvs?rev=251143&root=gcc&view=rev
Log:
2017-08-17  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/81827
        * tree-ssa-structalias.c (struct variable_info): Add is_reg_var
        flag.
        (new_var_info): Initialize it conservatively.
        (get_call_vi): Mark register vars.
        (new_scalar_tmp_constraint_exp): Likewise.
        (handle_rhs_call): Likewise.
        (handle_const_call): Likewise.
        (create_function_info_for): Likewise.
        (solve_constraints): Sort varinfos to separate register from
        non-register vars to pack points-to solution bitmaps during
        iteration.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-ssa-structalias.c