[Bug middle-end/100908] asan clobberes register asm variables

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100908

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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           Severity|normal                      |enhancement

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andreas Krebbel from comment #1)
> https://gcc.gnu.org/pipermail/gcc/2021-June/236269.html

Yes this will help solve the limitations which are already mentioned in the
manual:
Warning: In the above example, be aware that a register (for example r0) can be
call-clobbered by subsequent code, including function calls and library calls
for arithmetic operators on other variables (for example the initialization of
p2). In this case, use temporary variables for expressions between the register
assignments: