[Bug tree-optimization/91812] [7 Regression] GCC ignores volatile modifier

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91812

--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Oct 24 09:38:56 2019
New Revision: 277370

URL: https://gcc.gnu.org/viewcvs?rev=277370&root=gcc&view=rev
Log:
2019-10-24  Richard Biener  <rguenther@suse.de>

        Backport from mainline
        2019-10-17  Richard Biener  <rguenther@suse.de>

        PR debug/91887
        * dwarf2out.c (gen_formal_parameter_die): Also try to match
        context_die against a DW_TAG_GNU_formal_parameter_pack parent.

        * g++.dg/debug/dwarf2/pr91887.C: New testcase.

        2019-09-19  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/91812
        * tree-ssa-phiprop.c (propagate_with_phi): Do not replace
        volatile loads.

        * gcc.dg/torture/pr91812.c: New testcase.

Added:
    branches/gcc-7-branch/gcc/testsuite/g++.dg/debug/dwarf2/pr91887.C
    branches/gcc-7-branch/gcc/testsuite/gcc.dg/torture/pr91812.c
Modified:
    branches/gcc-7-branch/gcc/ChangeLog
    branches/gcc-7-branch/gcc/dwarf2out.c
    branches/gcc-7-branch/gcc/testsuite/ChangeLog
    branches/gcc-7-branch/gcc/tree-ssa-phiprop.c