[Bug c/53933] Register choosing error when inline assembly used at inline function

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53933

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-07-12 
06:55:21 UTC ---
>1) the system type: arm cortex-a8 / linux-montavista

We (MontaVista) does not provide a GCC 4.6.x.


Anyways the problem is not related to GCC but rather your inline-asm is
incorrect.  You should mark the output constraint as an early clobber since you
write to it before reading the input registers like so:
    asm volatile (
            "mov %0, %1     \n\t"
            "cmp %1, %2     \n\t"
            "movlt %0, %2   \n\t"
            "cmp %1, %3     \n\t"
            "movgt %0, %3   \n\t"
            : "=&r"(a)
            : "r"(a), "r"(amin), "r"(amax)
            //: "r0", "r1", "r2"
            );