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Re: [C++11][4.9] Add missing REDUC_PLUS_EXPR case to potential_constant_expression_1.

On Thu, 14 Mar 2013, Jakub Jelinek wrote:

I wonder if it wouldn't be better to fold the target builtins only later on
(e.g. guard the folding with cfun && gimple_in_ssa_p (cfun) (or if we have
any predicate that is set starting with gimplification or so)).
Having all the FEs have to deal with myriads of weird tree codes etc. isn't
IMHO desirable.

Wouldn't that prevent from using those builtins in constant expressions? That seems undesirable. Maybe an alternative could be to push some of the functionality from potential_constant_expression_1 to the middle-end?

--
Marc Glisse

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