[PATCH] powerpc: fix ifunc-sel.h with GCC 6

[Florian Weimer]

On 07/21/2016 11:36 AM, Aurelien Jarno wrote:
> On 32-bit PowerPC GCC 6 always saves the PIC register on the stack in
> the prologue and adjust the stack in the epilogue. It is therefore not
> possible anymore to just exit the function in the inline asm code,
> otherwise it corrupts the stack pointer. This causes the following tests
> to fail when using GCC 6:

>  	   : "=r" (ret)
>  	   : "X" (&global), "X" (f1), "X" (f2), "X" (f3));
>    return ret;

The inline assembly still lacks clobbers for registers 11 and 12, and 
the "X" constraint is incorrect (it should be "i", I think).

Florian