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Re: pr14627

Diego Novillo wrote:

> Particularly if constants in PHI arguments are also blocking scalar
> evolutions.

The scalar evolution analysis will not be disturbed by this change:
the last step of the analysis consists in an instantiation of all the
SSA_NAMEs that are left in the expressions, such that you end by
asking the information that was not propagated down into phi's
arguments during this last step.
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