ical example that would allow GCC to optimize it?
int foo3(int *restrict * p, int *restrict * q)
{
int a;
*p = &a;
**q = 11;
**p = 12;
return **q;
}
Kind regards,
Ties
Op di 13 feb 2024 om 15:29 schreef Joseph Myers :
> On Tue, 13 Feb 2024, Ties Klappe via Gcc wrote:
>
Hi,
I have two questions related to nested restrict pointers.
GCC 13.02 with optimization level 3 optimizes the function *foo1* to simply
return 10.
int foo1(int *restrict *restrict p, int *restrict *restrict q)
{
**p = 10;
**q = 11;
return **p;
}
I am curious why the function *foo2*
required? I would have
expected to see the same optimization as is performed for the struct
example.
Kind regards,
Ties
Op do 30 nov 2023 om 13:16 schreef Richard Biener <
richard.guent...@gmail.com>:
> On Thu, Nov 30, 2023 at 12:07 PM Ties Klappe via Gcc
> wrote:
> >
> &
When reading section 6.7.3.1 of the C standard (quoted below) about
the *restrict
*type qualifier, the first section talks about *ordinary identifiers*.
These are defined in section 6.2.3, and exclude members of structures.
Let D be a declaration of an ordinary identifier that provides a means of
