Re: [PATCH] Improve prepare_shrink_wrap to sink more instructions

[Jeff Law]

On 09/11/14 14:58, Wang Jiong wrote:

    the reg_found will record the # of registers, and there will be a
check to make sure no register or just 1 register in the src.
    so if "reg_found" is bigger than 1, then src will be assigned to
NULL_RTX, that we just stop the move.
   +      if (arg.nonconst_found
   +          || arg.reg_found > 1)
   +    src = NULL_RTX;

   am I missing something here?
No, I was just reiterating that you are going to need that code, so some 
kind of walker would still be necessary.  Sorry I wasn't clear about that.

jeff