[PATCH] Speed up hybrid_search_bitmap

[Zdenek Dvorak]

Hello,

> > there is no reason to use Fibonacci heaps for worklist in
> > iterative_dataflow_bitmap; this patch replaces them with ordinary
> > heaps, thus speeding up df_analyse by 20%.
> Something that was a long time on my TODO list :)
> You forgot to attach heap.c/heap.h.

here they are.

Zdenek
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