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[fortran,patch] Add simplifiers for ISNAN and IS_IOSTAT_{END,EOR}


Attached patch simply does what it says in the subject. Not very exciting, but required by the standard because the IS_IOSTAT_* functions are allowed in initialization expressions (ISNAN is a GNU extension).

Bootstrapped and regtested on i686-darwin, comes with testcases. OK to commit?


FX



Attachment: simplifiers.ChangeLog
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Attachment: simplifiers.diff
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