https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84278
--- Comment #6 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot
Uni-Bielefeld.DE> ---
> --- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> ---
[...]
>> +FAIL: gcc.target/i386/pr84278.c scan-assembler-not (%.sp)
>
> I'm blind - I cannot spot (%.sp) in the assembler. Hmm. Maybe
> the regex needs to be \\\(%.sp\\\)? I want to match (%rsp) and
> (%esp) here (loads from the stack).
The RE matched
movl %esp, %ebp
Tcl uses ERE (egrep style), so you need to quote literal parens.
