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#ifndef cg_dfn_h
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#define cg_dfn_h
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/*
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* Flags which mark a symbol as topologically ``busy'' or as
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* topologically ``not_numbered'':
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*/
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#define DFN_BUSY -1
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#define DFN_NAN 0
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/*
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* Depth-first numbering of a call-graph.
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*/
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extern void cg_dfn (Sym * root);
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#endif /* cg_dfn_h */
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