[Bug middle-end/45579] Re-enable IPA-CP for "fn spec"

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45579

Bug 45579 depends on bug 43665, which changed state.

Bug 43665 Summary: INTENT(IN) etc. optimization of calls: function annotations 
for noclobber/noescape arguments
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43665

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED