[Bug tree-optimization/88533] [9 Regression] Higher performance penalty of array-bounds checking for sparse-matrix vector multiply

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88533

--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Dec 19 11:10:08 2018
New Revision: 267262

URL: https://gcc.gnu.org/viewcvs?rev=267262&root=gcc&view=rev
Log:
2018-12-19  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/88533
        Revert
        2018-04-30  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/28364
        PR tree-optimization/85275
        * tree-ssa-loop-ch.c (ch_base::copy_headers): Stop after
        copying first exit test.

        * gcc.dg/tree-ssa/ssa-dom-thread-7.c: Adjust.

        * tree-ssa-loop-ch.c: Include tree-phinodes.h and
        ssa-iterators.h.
        (should_duplicate_loop_header_p): Track whether stmt compute
        loop invariants or values based on IVs.  Apart from the
        original loop header only duplicate blocks with exit tests
        that are based on IVs or invariants.

        * gcc.dg/tree-ssa/copy-headers-6.c: New testcase.
        * gcc.dg/tree-ssa/copy-headers-7.c: Likewise.
        * gcc.dg/tree-ssa/ivopt_mult_1.c: Un-XFAIL.
        * gcc.dg/tree-ssa/ivopt_mult_2.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/copy-headers-6.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/copy-headers-7.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ivopt_mult_1.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ivopt_mult_2.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-thread-7.c
    trunk/gcc/tree-ssa-loop-ch.c