[Bug tree-optimization/15457] [tree-ssa] Convert a sign bit testing into "a < 0"

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-05-17 02:03 -------
PR 15359 will fix foo and baa but not baz for some reason.

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15457