[Bug tree-optimization/97307] Optimization for pure vs. const function

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97307

--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rgue...@gcc.gnu.org>:

https://gcc.gnu.org/g:dae673abd37d400408959497e50fe1f3fbef5533

commit r11-3705-gdae673abd37d400408959497e50fe1f3fbef5533
Author: Richard Biener <rguent...@suse.de>
Date:   Wed Oct 7 10:42:12 2020 +0200

    tree-optimization/97307 - improve sinking of loads

    This improves the heuristics finding a sink location for loads that does
    not cross any store.

    2020-10-07  Richard Biener  <rguent...@suse.de>

            PR tree-optimization/97307
            * tree-ssa-sink.c (statement_sink_location): Change heuristic
            for not skipping stores to look for virtual definitions
            rather than uses.

            * gcc.dg/tree-ssa/ssa-sink-17.c: New testcase.
            * gcc.dg/vect/pr65947-3.c: XFAIL.