[Bug tree-optimization/48052] loop not vectorized if index is "unsigned int"

[amker at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48052

--- Comment #14 from amker at gcc dot gnu.org ---
Author: amker
Date: Tue Jun  2 10:19:18 2015
New Revision: 224020

URL: https://gcc.gnu.org/viewcvs?rev=224020&root=gcc&view=rev
Log:

        PR tree-optimization/48052
        * cfgloop.h (struct control_iv): New.
        (struct loop): New field control_ivs.
        * tree-ssa-loop-niter.c : Include "stor-layout.h".
        (number_of_iterations_lt): Set no_overflow information.
        (number_of_iterations_exit): Init control iv in niter struct.
        (record_control_iv): New.
        (estimate_numbers_of_iterations_loop): Call record_control_iv.
        (loop_exits_before_overflow): New.  Interface factored out of
        scev_probably_wraps_p.
        (scev_probably_wraps_p): Factor loop niter related code into
        loop_exits_before_overflow.
        (free_numbers_of_iterations_estimates_loop): Free control ivs.
        * tree-ssa-loop-niter.h (free_loop_control_ivs): New.

        gcc/testsuite/ChangeLog
        PR tree-optimization/48052
        * gcc.dg/tree-ssa/scev-8.c: New.
        * gcc.dg/tree-ssa/scev-9.c: New.
        * gcc.dg/tree-ssa/scev-10.c: New.
        * gcc.dg/vect/pr48052.c: New.


Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/scev-10.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/scev-8.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/scev-9.c
    trunk/gcc/testsuite/gcc.dg/vect/pr48052.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfgloop.h
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-loop-niter.c
    trunk/gcc/tree-ssa-loop-niter.h