[Bug rtl-optimization/91137] [7/8/9 Regression] Wrong code with -O3

[amker at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91137

--- Comment #13 from bin cheng <amker at gcc dot gnu.org> ---
Author: amker
Date: Wed Jul 24 01:28:33 2019
New Revision: 273754

URL: https://gcc.gnu.org/viewcvs?rev=273754&root=gcc&view=rev
Log:
        Backport from mainline
        2019-07-18  Bin Cheng  <bin.linux@linux.alibaba.com>

        PR tree-optimization/91137
        * tree-ssa-loop-ivopts.c (struct ivopts_data): New field.
        (tree_ssa_iv_optimize_init, alloc_iv, tree_ssa_iv_optimize_finalize):
        Init, use and fini the above new field.
        (determine_base_object_1): New function.
        (determine_base_object): Reimplement using walk_tree.

gcc/testsuite
        2019-07-18  Bin Cheng  <bin.linux@linux.alibaba.com>

        PR tree-optimization/91137
        * gcc.c-torture/execute/pr91137.c: New test.

Added:
    branches/gcc-9-branch/gcc/testsuite/gcc.c-torture/execute/pr91137.c
Modified:
    branches/gcc-9-branch/gcc/ChangeLog
    branches/gcc-9-branch/gcc/testsuite/ChangeLog
    branches/gcc-9-branch/gcc/tree-ssa-loop-ivopts.c