[GSoC] decision tree first steps

[Michael Matz]

Hi,

On Mon, 16 Jun 2014, Richard Biener wrote:

> For
> 
> (match_and_simplify
>   (MINUS_EXPR @2 (PLUS_EXPR@2 @0 @1))
>   @1)

Btw, this just triggered my eye.  So with lumping the predicate to the 
capture without special separator syntax, it means that there's a 
difference between "minus_expr @2" and "minus_expr@2" with a meaningful 
whitespace (despite 'r' and '@' already being a natural word boundary), 
which seems less than ideal.  Just mentioning :)


Ciao,
Michael.