[Bug tree-optimization/90240] [10 Regression] ICE in try_improve_iv_set, at tree-ssa-loop-ivopts.c:6694

[amker at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90240

--- Comment #10 from bin cheng <amker at gcc dot gnu.org> ---
Author: amker
Date: Wed May  8 11:24:38 2019
New Revision: 271007

URL: https://gcc.gnu.org/viewcvs?rev=271007&root=gcc&view=rev
Log:
        PR tree-optimization/90240
        * tree-ssa-loop-ivopts.c (get_scaled_computation_cost_at): Scale cost
        with respect to scaling factor pre-computed for each basic block.
        (try_improve_iv_set): Return bool if best_cost equals to iv_ca cost.
        (find_optimal_iv_set_1): Free iv_ca set if it has infinite_cost.
        (COST_SCALING_FACTOR_BOUND, determine_scaling_factor): New.
        (tree_ssa_iv_optimize_loop): Call determine_scaling_factor.  Extend
        live range for array of loop's basic blocks.  Cleanup aux field of
        loop's basic blocks.

        gcc/testsuite
        * gfortran.dg/graphite/pr90240.f: New test.

Added:
    trunk/gcc/testsuite/gfortran.dg/graphite/pr90240.f
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-loop-ivopts.c