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From: Alexandre Oliva <aoliva@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc(refs/users/aoliva/heads/testme)] hardcfr: prevent deferred sets of visited bitmap Date: Thu, 20 Oct 2022 05:46:02 +0000 (GMT) [thread overview] Message-ID: <20221020054602.265CC385E03D@sourceware.org> (raw) https://gcc.gnu.org/g:bacbf8a89d79238228344cbe41444b565ec4979c commit bacbf8a89d79238228344cbe41444b565ec4979c Author: Alexandre Oliva <oliva@adacore.com> 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<tree, va_gc> *inputs = NULL; + vec<tree, va_gc> *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; }
next reply other threads:[~2022-10-20 5:46 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-10-20 5:46 Alexandre Oliva [this message] -- strict thread matches above, loose matches on Subject: below -- 2023-06-09 8:07 Alexandre Oliva 2023-06-09 6:17 Alexandre Oliva 2023-06-08 10:59 Alexandre Oliva 2023-06-08 10:43 Alexandre Oliva 2023-06-08 9:17 Alexandre Oliva 2023-06-08 4:47 Alexandre Oliva 2022-10-25 2:52 Alexandre Oliva 2022-10-20 22:32 Alexandre Oliva 2022-10-20 4:09 Alexandre Oliva
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