public inbox for gcc-cvs@sourceware.org help / color / mirror / Atom feed
From: Alexandre Oliva <aoliva@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc(refs/users/aoliva/heads/hardcfr)] enable control flow redundancy hardening unconditionally Date: Fri, 21 Jan 2022 20:25:40 +0000 (GMT) [thread overview] Message-ID: <20220121202540.55954385AC31@sourceware.org> (raw) https://gcc.gnu.org/g:5c07f1f408ec72a437ededc2ee8fe054a7745e5e commit 5c07f1f408ec72a437ededc2ee8fe054a7745e5e Author: Alexandre Oliva <oliva@adacore.com> Date: Wed Jan 19 05:51:13 2022 -0300 enable control flow redundancy hardening unconditionally Diff: --- gcc/common.opt | 2 +- gcc/gimple-harden-control-flow.cc | 4 ++++ gcc/params.opt | 2 +- 3 files changed, 6 insertions(+), 2 deletions(-) diff --git a/gcc/common.opt b/gcc/common.opt index 1ebcf307963..474085595bb 100644 --- a/gcc/common.opt +++ b/gcc/common.opt @@ -1771,7 +1771,7 @@ Common Var(flag_harden_conditional_branches) Optimization Harden conditional branches by checking reversed conditions. fharden-control-flow-redundancy -Common Var(flag_harden_control_flow_redundancy) Optimization +Common Var(flag_harden_control_flow_redundancy) Init(-1) Optimization Harden control flow by recording and checking execution paths. ; Nonzero means ignore `#ident' directives. 0 means handle them. diff --git a/gcc/gimple-harden-control-flow.cc b/gcc/gimple-harden-control-flow.cc index 65b0b701744..2d62e8e2f76 100644 --- a/gcc/gimple-harden-control-flow.cc +++ b/gcc/gimple-harden-control-flow.cc @@ -84,6 +84,8 @@ public: call and restore it if it returns again. */ if (fun->calls_setjmp) { + if (flag_harden_control_flow_redundancy < 0) + return false; warning_at (DECL_SOURCE_LOCATION (fun->decl), 0, "%qD calls %<setjmp%> or similar," " %<-fharden-control-flow-redundancy%> is not supported", @@ -93,6 +95,8 @@ public: if (n_basic_blocks_for_fn (fun) - 2 > param_hardcfr_max_blocks) { + if (flag_harden_control_flow_redundancy < 0) + return false; warning_at (DECL_SOURCE_LOCATION (fun->decl), 0, "%qD has more than %u blocks, the requested" " maximum for %<-fharden-control-flow-redundancy%>", diff --git a/gcc/params.opt b/gcc/params.opt index 147ecdb684c..de834ac20b7 100644 --- a/gcc/params.opt +++ b/gcc/params.opt @@ -202,7 +202,7 @@ Common Joined UInteger Var(param_graphite_max_nb_scop_params) Init(10) Param Opt Maximum number of parameters in a SCoP. -param=hardcfr-max-blocks= -Common Joined UInteger Var(param_hardcfr_max_blocks) Init(-1) Param Optimization +Common Joined UInteger Var(param_hardcfr_max_blocks) Init(32) Param Optimization Maximum number of blocks for -fharden-control-flow-redundancy. -param=hardcfr-max-inline-blocks=
next reply other threads:[~2022-01-21 20:25 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-01-21 20:25 Alexandre Oliva [this message] 2022-05-06 8:09 Alexandre Oliva
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20220121202540.55954385AC31@sourceware.org \ --to=aoliva@gcc.gnu.org \ --cc=gcc-cvs@gcc.gnu.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).