> -----Original Message----- > From: gcc-patches-ow...@gcc.gnu.org [mailto:gcc-patches- > ow...@gcc.gnu.org] On Behalf Of H.J. Lu > Sent: Tuesday, February 6, 2018 10:09 PM > To: gcc-patches@gcc.gnu.org > Cc: Uros Bizjak <ubiz...@gmail.com>; Tsimbalist, Igor V > <igor.v.tsimbal...@intel.com> > Subject: [PATCH] i386: Mask out the CF_SET bit for -fcf-protection check > > Since ix86_option_override_internal sets the CF_SET bit in > flag_cf_protection and it can be called more than once via pragma, > we need to mask out the CF_SET bit when checking flag_cf_protection. > > OK for trunk if there is no regression?
Ok from CET viewpoint. Thanks, Igor > H.J. > --- > PR target/84248 > * config/i386/i386.c (ix86_option_override_internal): Mask out > the CF_SET bit when checking -fcf-protection. > --- > gcc/config/i386/i386.c | 10 +++++----- > 1 file changed, 5 insertions(+), 5 deletions(-) > > diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c > index 6c612c77987..ef7ff89bcbb 100644 > --- a/gcc/config/i386/i386.c > +++ b/gcc/config/i386/i386.c > @@ -4913,12 +4913,12 @@ ix86_option_override_internal (bool > main_args_p, > = build_target_option_node (opts); > > /* Do not support control flow instrumentation if CET is not enabled. */ > - if (opts->x_flag_cf_protection != CF_NONE) > + cf_protection_level cf_protection > + = (cf_protection_level) (opts->x_flag_cf_protection & ~CF_SET); > + if (cf_protection != CF_NONE) > { > - switch (flag_cf_protection) > + switch (cf_protection) > { > - case CF_NONE: > - break; > case CF_BRANCH: > if (! TARGET_IBT_P (opts->x_ix86_isa_flags2)) > { > @@ -4953,7 +4953,7 @@ ix86_option_override_internal (bool main_args_p, > } > > opts->x_flag_cf_protection = > - (cf_protection_level) (opts->x_flag_cf_protection | CF_SET); > + (cf_protection_level) (cf_protection | CF_SET); > } > > if (ix86_tune_features [X86_TUNE_AVOID_128FMA_CHAINS]) > -- > 2.14.3