[Bug middle-end/54146] Very slow compile with attribute((flatten))

[steven at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54146

--- Comment #48 from Steven Bosscher <steven at gcc dot gnu.org> 2012-08-16 
10:52:20 UTC ---
Author: steven
Date: Thu Aug 16 10:52:14 2012
New Revision: 190442

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=190442
Log:
    PR middle-end/54146
    * tree-flow.h (compute_global_livein): Remove prototype.
    * tree-into-ssa.c (compute_global_livein): Remove function.
    * tree-ssa-loop-manip.c: Include gimple-pretty-print.h.
    (find_sibling_superloop): New function.
    (compute_live_loop_exits): New function.
    (add_exit_phis_edge): Rename to add_exit_phi.  Do not allow
    inserting a PHI in a block that is not a loop exit for VAR.
    Add dumping if TDF_DETAILS.
    (add_exit_phis_var): Rewrite.
    (add_exit_phis): Update.
    (get_loops_exits): Rewrite to return an array of per-loop exits
    rather than one bitmap with all loop exits.
    (find_uses_to_rename_bb): Ignore virtual PHI nodes.
    (rewrite_into_loop_closed_ssa): Update.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-flow.h
    trunk/gcc/tree-into-ssa.c
    trunk/gcc/tree-ssa-loop-manip.c