Chris Lattner 96ad31321a Change FindEarliestCallSeqEnd (used by libcall insertion) to use a set to ...

avoid revisiting nodes more than once.  This eliminates a source of
potentially exponential behavior.  For a small function in 191.fma3d
(hexah_stress_divergence_), this speeds up isel from taking > 20mins to
taking 0.07s.

llvm-svn: 22680

2005-08-05 18:10:27 +00:00

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