[Bug c/20238] signed/unsigned multiplication + sign extension broken 32->64 bit sign promotion?

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-02-27 
21:08 -------
No I think this is invalid and here is why:
casting even to unsigned still sign extened.

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20238