Re: loop in asm

[Segher Boessenkool <segher@xxxxxxxxxxxxxxxxxxx>]

> When I compiled it by "gcc -Wall 1.c", I did not get
> any compilation errors.
>
> But surprisingly I got compilation error when I
> compiled it by "gcc -O3 -Wall 1.c", I got comilation
> error saying that label .JIT already defined .

It inlined the function, but also kept a separate
copy because the function it is defined in isn't
static.

> How to solve it?

You can use local labels, for example

void fun()
{
asm volatile (" movl $0xFFFFFFFF, %%ecx;"
                "0: loop 0b\n;"
                :
                :
                :"%ecx");
}


Segher