[gcc r13-5736] tree.def: Remove outdated comment on SAD_EXPR

[Jakub Jelinek]

https://gcc.gnu.org/g:aa12d1b17c4557f6770f2c05d44525e105372ae6

commit r13-5736-gaa12d1b17c4557f6770f2c05d44525e105372ae6
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Wed Feb 8 12:02:35 2023 +0100

    tree.def: Remove outdated comment on SAD_EXPR
    
    While looking at PR108692, I've noticed SAD_EXPR comment mentions that
    WIDEN_MINUS_EXPR is missing, which is not true anymore since r11-5160.
    
    The following patch just removes that part of the comment.
    
    2023-02-08  Jakub Jelinek  <jakub@redhat.com>
    
            * tree.def (SAD_EXPR): Remove outdated comment about missing
            WIDEN_MINUS_EXPR.

Diff:
---
 gcc/tree.def | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/gcc/tree.def b/gcc/tree.def
index 087265459b7..e639a039db9 100644
--- a/gcc/tree.def
+++ b/gcc/tree.def
@@ -1341,8 +1341,7 @@ DEFTREECODE (WIDEN_SUM_EXPR, "widen_sum_expr", tcc_binary, 2)
    The first two arguments are of type t1 which should be integer.
    The third argument and the result are of type t2, such that t2 is at least
    twice the size of t1.  Like DOT_PROD_EXPR, SAD_EXPR (arg1,arg2,arg3) is
-   equivalent to (note we don't have WIDEN_MINUS_EXPR now, but we assume its
-   behavior is similar to WIDEN_SUM_EXPR):
+   equivalent to:
        tmp = WIDEN_MINUS_EXPR (arg1, arg2)
        tmp2 = ABS_EXPR (tmp)
        arg3 = PLUS_EXPR (tmp2, arg3)