From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 2140) id 265CC385E03D; Thu, 20 Oct 2022 05:46:02 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 265CC385E03D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1666244762; bh=T1DSm+H2rK3587c4gBeeSfCmZdDX0h5glE5jHyS/mZw=; h=From:To:Subject:Date:From; b=QVDS/ZE9OUXR3mkIdNPqEPSbjcYTUkTR5X+YWgMmzgPxZW9dOuysSMKc7s1Rc/B4B SFcWhW+EEGIEm3Om2dCbbj6/7Bv6hRNrysIjNpRUo0DTcWTrWKhRoT3dITYz9ejwEg CRFuk2muD8AFyWZDOhMD5PGmh6dWND15ZzyXknyY= Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Alexandre Oliva To: gcc-cvs@gcc.gnu.org Subject: [gcc(refs/users/aoliva/heads/testme)] hardcfr: prevent deferred sets of visited bitmap X-Act-Checkin: gcc X-Git-Author: Alexandre Oliva X-Git-Refname: refs/users/aoliva/heads/testme X-Git-Oldrev: f9b0e7992963ace4b3167f7bfdc822c80c2d3f63 X-Git-Newrev: bacbf8a89d79238228344cbe41444b565ec4979c Message-Id: <20221020054602.265CC385E03D@sourceware.org> Date: Thu, 20 Oct 2022 05:46:02 +0000 (GMT) List-Id: https://gcc.gnu.org/g:bacbf8a89d79238228344cbe41444b565ec4979c commit bacbf8a89d79238228344cbe41444b565ec4979c Author: Alexandre Oliva Date: Wed Oct 19 20:36:28 2022 -0300 hardcfr: prevent deferred sets of visited bitmap Diff: --- gcc/gimple-harden-control-flow.cc | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/gcc/gimple-harden-control-flow.cc b/gcc/gimple-harden-control-flow.cc index 1ea47615cd4..4d40fc98779 100644 --- a/gcc/gimple-harden-control-flow.cc +++ b/gcc/gimple-harden-control-flow.cc @@ -545,6 +545,26 @@ class rt_bb_visited gassign *vstore = gimple_build_assign (unshare_expr (setme), temp); gimple_seq_add_stmt (&seq, vstore); + /* Prevent stores into visited from being deferred. + asm ("" : "+m" (visited)); */ + vec *inputs = NULL; + vec *outputs = NULL; +#if 0 /* ... or combined in any way. */ + vec_safe_push (outputs, + build_tree_list + (build_tree_list + (NULL_TREE, build_string (2, "=m")), + visited)); +#endif + vec_safe_push (inputs, + build_tree_list + (build_tree_list + (NULL_TREE, build_string (1, "m")), + visited)); + gasm *stabilize = gimple_build_asm_vec ("", inputs, outputs, + NULL, NULL); + gimple_seq_add_stmt (&seq, stabilize); + return seq; }