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On 06/24/2015 05:43 AM, Richard Biener wrote:
It's worth looking at -- I've certainly seen cases where we end up infinite recursion because we've got a transformation in once place (say match.pd) and its inverse elsewhere (fold-const.c).Note that ISTR code performing exactly the opposite transform in fold-const.c ...That's another reason why I'm worried about just doing the (negate ...) thing without knowing whether the negate can be folded into anything else.I'm not aware of anything here.
Jeff
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