On Fri, 11 Jan 2019, Jakub Jelinek wrote:
> On Fri, Jan 11, 2019 at 01:53:21PM +0100, Richard Biener wrote:
> > >The canary slot in the stack frame is written in the prologue using
> > >MEM_VOLATILE_P store, so we never consider those to be DSEd and is only
> > >read
> > >in the epilogue, so it sh
On Fri, Jan 11, 2019 at 01:53:21PM +0100, Richard Biener wrote:
> >The canary slot in the stack frame is written in the prologue using
> >MEM_VOLATILE_P store, so we never consider those to be DSEd and is only
> >read
> >in the epilogue, so it shouldn't alias any other stores.
> >Similarly, __stack
On January 10, 2019 11:38:55 PM GMT+01:00, Jakub Jelinek
wrote:
>Hi!
>
>As mentioned in the PR, RTL DSE doesn't do much with
>-fstack-protector*,
>because the stack canary test in the epilogue of instrumented functions
>is a MEM_VOLATILE_P read out of the crtl->stack_protect_guard ssp
>canary
>sl
Hi!
As mentioned in the PR, RTL DSE doesn't do much with -fstack-protector*,
because the stack canary test in the epilogue of instrumented functions
is a MEM_VOLATILE_P read out of the crtl->stack_protect_guard ssp canary
slot in the stack frame and either a MEM_VOLATILE_P read of
__stack_chk_guar
