[Bug tree-optimization/85964] [8/9 Regression] compile time hog w/ -O3 -ftracer -fno-guess-branch-probability

["rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85964

--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Jun  6 15:06:50 2018
New Revision: 261237

URL: https://gcc.gnu.org/viewcvs?rev=261237&root=gcc&view=rev
Log:
2018-06-06  Richard Biener  <rguenther@suse.de>

        Backport from mainline
        2018-06-04  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/86038
        * tracer.c (find_best_successor): Check probability for
        being initialized, bail out if not.

        * gcc.dg/pr86038.c: New testcase.

        2018-05-30  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/85964
        * tracer.c (better_p): Drop initialized count check, we only
        call the function with initialized counts now.
        (find_best_successor): Do find a best edge if one
        has uninitialized count.
        (find_best_predecessor): Likewise.  Do BB frequency check only
        if count is initialized.

        2018-05-28  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/85934
        * tree-vect-generic.c (expand_vector_operations_1): Hoist
        vector boolean check before scalar optimization.

        * gcc.target/i386/pr85934.c: New testcase.

        2018-05-22  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/85863
        * tree-vect-stmts.c (vect_is_simple_cond): Only widen invariant
        comparisons when vectype is specified.
        (vectorizable_condition): Do not specify vectype for
        vect_is_simple_cond when SLP vectorizing.

        * gfortran.fortran-torture/compile/pr85863.f: New testcase.

Added:
    branches/gcc-8-branch/gcc/testsuite/gcc.dg/pr86038.c
    branches/gcc-8-branch/gcc/testsuite/gcc.target/i386/pr85934.c
   
branches/gcc-8-branch/gcc/testsuite/gfortran.fortran-torture/compile/pr85863.f
Modified:
    branches/gcc-8-branch/gcc/ChangeLog
    branches/gcc-8-branch/gcc/testsuite/ChangeLog
    branches/gcc-8-branch/gcc/tracer.c
    branches/gcc-8-branch/gcc/tree-vect-generic.c
    branches/gcc-8-branch/gcc/tree-vect-stmts.c