[trans-mem] RFC Fix missing REG_TM notes

[Patrick Marlier]

On 01/10/2012 05:39 PM, Richard Henderson wrote:
> Also outstanding is that the return value setup for beginTransaction
> needs to be adjusted into the new block.  I.e. we current generate
>
>     (set (reg eax) (call _ITM_beginTransaction))
>     (set (reg psuedo) (reg eax))
> .Lrestart:
>     // rest of tm block
>
> This must be
>
>     (set (reg eax) (call _ITM_beginTransaction))
> .Lrestart:
>     (set (reg psuedo) (reg eax))
>     // rest of tm block
>
> lest the register allocator do the wrong thing.

Yep good point. It means moving the insn from one BB to the next BB but 
I have no idea how to do it and where it should be done.

Thanks.
--
Patrick.