[PATCH] Improved udivmodsi4 with support for ARMv4

[Tim Northover]

Thanks for working on those benchmarks Renato.

>   or, reuse something that compiler-rt does for you. GLibC does this when GCC != 4.8:
>
>     /* The __ARM_ARCH define is provided by gcc 4.8.  Construct it otherwise.  */
>     #ifndef __ARM_ARCH
>     # ifdef __ARM_ARCH_2__
>     #  define __ARM_ARCH 2

I much prefer this one. We can even put it in a header and then nuke
it the second LLVM starts requiring GCC 4.8.

Cheers.

Tim.