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Commit 080ea642 authored by Roger Sayle's avatar Roger Sayle Committed by Roger Sayle
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fold-const.c (negate_expr_p): New function to determine whether an expression... 

fold-const.c (negate_expr_p): New function to determine whether an expression can be negated cheaply.


	* fold-const.c (negate_expr_p): New function to determine whether
	an expression can be negated cheaply.
	(fold) [MINUS_EXPR]: Use it to determine whether to transform
	-A - B into -B - A for floating point types.

From-SVN: r63059
parent e360ab39
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