Hi all,

This patch generalises the TARGET_MACRO_FUSION_PAIR_P hook usage to work 
on more than just
compares and conditional branches for which it was initially designed 
for (for x86).

There are some instructions in arm and aarch64 that can be fused 
together when they're back to back in the instruction stream and I'd 
like to use this hook to keep them together.

I'll post an implementation of TARGET_MACRO_FUSION_PAIR_P for arm and 
aarch64 shortly...

Bootstrapped and tested on x86, aarch64-none-linux-gnu and 
arm-none-linux-gnueabihf.

Ok for trunk?

2014-06-27  Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
                     Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

     * sched-deps.c (try_group_insn): Generalise macro fusion hook usage
     to any two insns.  Update comment.