[Bug middle-end/37921] __builtin_constant_p seems to be giving false positives

[manu at gcc dot gnu dot org]

------- Comment #9 from manu at gcc dot gnu dot org  2010-01-02 20:33 -------
(In reply to comment #8)
> Re-confirmed.  The issue is that we fold __builtin_constant_p only after
> VRP1 so the dead code remains and we warn about it.

Perhaps this is the root cause of both PR35392 and PR35903.



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37921