[Bug middle-end/38474] compile time explosion in dataflow_set_preserve_mem_locs at -O3

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38474

--- Comment #78 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Dec 10 12:31:39 2013
New Revision: 205857

URL: http://gcc.gnu.org/viewcvs?rev=205857&root=gcc&view=rev
Log:
2013-12-10  Richard Biener  <rguent...@suse.de>

    PR middle-end/38474
    * tree-ssa-structalias.c (solution_set_expand): Expand into
    a different possibly cached bitmap and return the result.
    (set_union_with_increment): Pass in a shared expanded bitmap
    and adjust.
    (do_sd_constraint): Likewise.
    (do_ds_constraint): Likewise.
    (do_complex_constraint): Likewise.
    (solve_graph): Manage the shared expanded bitmap.

    * gcc.dg/ipa/ipa-pta-14.c: Un-XFAIL.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/ipa/ipa-pta-14.c
    trunk/gcc/tree-ssa-structalias.c