From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 2140) id 9EA293858CD1; Thu, 29 Jun 2023 18:42:13 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 9EA293858CD1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1688064133; bh=Ji/EoCmYSIRjhvkJXl2ZRD/m05tMa5Tm6Afcf9Az1/A=; h=From:To:Subject:Date:From; b=PSCnbEsXOWjLjFtBQdFnCYPRaHXfBcC3GS1bW8o9AjodCTl09qGNh5Zu/SzWilS2q xfx1wr8vXv9luzk+picFS+E2bzezVZte++ONnyKbbkraBYVigg1cJcFXxbOl257eUe u/Vs3tXkdHmUim2N0QdsNsE56yxW2tSqYqQ14kDU= 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)] enable control flow redundancy hardening unconditionally X-Act-Checkin: gcc X-Git-Author: Alexandre Oliva X-Git-Refname: refs/users/aoliva/heads/testme X-Git-Oldrev: 657ff673e5a1b249f86e8ecb3febcabc69f9974a X-Git-Newrev: e4d622e5c377b29e3a6a62f0febea1ee9e037c7e Message-Id: <20230629184213.9EA293858CD1@sourceware.org> Date: Thu, 29 Jun 2023 18:42:13 +0000 (GMT) List-Id: https://gcc.gnu.org/g:e4d622e5c377b29e3a6a62f0febea1ee9e037c7e commit e4d622e5c377b29e3a6a62f0febea1ee9e037c7e Author: Alexandre Oliva Date: Wed Aug 24 13:36:58 2022 -0300 enable control flow redundancy hardening unconditionally Diff: --- gcc/common.opt | 2 +- gcc/gimple-harden-control-flow.cc | 6 ++++++ gcc/params.opt | 2 +- 3 files changed, 8 insertions(+), 2 deletions(-) diff --git a/gcc/common.opt b/gcc/common.opt index fe40fcd504b..a635a9c47a7 100644 --- a/gcc/common.opt +++ b/gcc/common.opt @@ -1824,7 +1824,7 @@ 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. fhardcfr-skip-leaf diff --git a/gcc/gimple-harden-control-flow.cc b/gcc/gimple-harden-control-flow.cc index 546837a450b..941ab0e4c51 100644 --- a/gcc/gimple-harden-control-flow.cc +++ b/gcc/gimple-harden-control-flow.cc @@ -91,6 +91,8 @@ 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 % or similar," " %<-fharden-control-flow-redundancy%> is not supported", @@ -104,6 +106,8 @@ public: enough to make it worthwhile. */ if (fun->has_nonlocal_label) { + if (flag_harden_control_flow_redundancy < 0) + return false; warning_at (DECL_SOURCE_LOCATION (fun->decl), 0, "%qD receives nonlocal gotos," " %<-fharden-control-flow-redundancy%> is not supported", @@ -115,6 +119,8 @@ public: && (n_basic_blocks_for_fn (fun) - NUM_FIXED_BLOCKS > 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 bd0679bdcd3..2db693838dc 100644 --- a/gcc/params.opt +++ b/gcc/params.opt @@ -175,7 +175,7 @@ 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(0) 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=