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tree.def: Remove outdated comment on SAD_EXPR

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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	* tree.def (SAD_EXPR): Remove outdated comment about missing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.
This commit is contained in:
Jakub Jelinek 2023-02-08 12:02:35 +01:00
parent 8f3b85efbf
commit aa12d1b17c
1 changed files with 1 additions and 2 deletions
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gcc/tree.def
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@ -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)