[Bug target/54480] Error: bad immediate value for offset

[ramana at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54480

Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |ramana at gcc dot gnu.org
         Resolution|                            |INVALID

--- Comment #1 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> 2012-09-04 19:37:34 UTC ---
Problem is because the input is invalid . We just end up generating 

ldrex r0, [r1, #-24] . 


    asm volatile(
        "movw %1, #1\n\t"
        "ldrex %2, %0\n\t"
        "cmp %3, %2\n\t"
        "bne.n 0f\n\t"
        "strex %1, %4, %0\n\t"
        "0:"
        : "+m"(*location), "=&r"(result), "=&r"(tmp)
        : "r"(expected), "r"(newValue)
        : "memory");


Eh - you can't use m for a constraint to an address in ldrex . Try "+Q"
instead.
regards,
Ramana