100 lines
2.9 KiB
C++
100 lines
2.9 KiB
C++
/*****************************************************************************
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* CFG, BB and interval related definitions
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* (C) Cristina Cifuentes
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****************************************************************************/
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#pragma once
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#include <list>
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#include <vector>
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/* Types of basic block nodes */
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/* Real basic blocks: type defined according to their out-edges */
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enum eBBKind
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{
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ONE_BRANCH = 0, /* unconditional branch */
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TWO_BRANCH = 1, /* conditional branch */
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MULTI_BRANCH=2, /* case branch */
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FALL_NODE=3, /* fall through */
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RETURN_NODE=4, /* procedure/program return */
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CALL_NODE=5, /* procedure call */
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LOOP_NODE=6, /* loop instruction */
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REP_NODE=7, /* repeat instruction */
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INTERVAL_NODE=8, /* contains interval list */
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TERMINATE_NODE=11, /* Exit to DOS */
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NOWHERE_NODE=12 /* No outedges going anywhere */
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};
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/* Depth-first traversal constants */
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enum eDFS
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{
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DFS_DISP=1, /* Display graph pass */
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DFS_MERGE=2, /* Merge nodes pass */
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DFS_NUM=3, /* DFS numbering pass */
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DFS_CASE=4, /* Case pass */
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DFS_ALPHA=5, /* Alpha code generation*/
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DFS_JMP=9 /* rmJMP pass - must be largest flag */
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};
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/* Control flow analysis constants */
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enum eNodeHeaderType
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{
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NO_TYPE=0, /* node is not a loop header*/
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WHILE_TYPE=1, /* node is a while header */
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REPEAT_TYPE=2, /* node is a repeat header */
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ENDLESS_TYPE=3 /* endless loop header */
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};
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/* Uninitialized values for certain fields */
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#define NO_NODE MAX /* node has no associated node */
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#define NO_DOM MAX /* node has no dominator */
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#define UN_INIT MAX /* uninitialized variable */
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#define THEN 0 /* then edge */
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#define ELSE 1 /* else edge */
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/* Basic Block (BB) flags */
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#define INVALID_BB 0x0001 /* BB is not valid any more */
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#define IS_LATCH_NODE 0x0002 /* BB is the latching node of a loop */
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struct BB;
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/* Interval structure */
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typedef std::list<BB *> queue;
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struct interval
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{
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byte numInt; /* # of the interval */
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byte numOutEdges; /* Number of out edges */
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queue nodes; /* Nodes of the interval*/
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queue::iterator currNode; /* Current node */
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interval *next; /* Next interval */
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BB *firstOfInt();
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interval()
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{
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numInt=numOutEdges=0;
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currNode=nodes.end();
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next=0;
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}
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};
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/* Derived Sequence structure */
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struct derSeq_Entry
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{
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BB * Gi; /* Graph pointer */
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interval * Ii; /* Interval list of Gi */
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derSeq_Entry() : Gi(0),Ii(0)
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{
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}
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~derSeq_Entry();
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public:
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void findIntervals();
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};
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class derSeq : public std::list<derSeq_Entry>
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{
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public:
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void display();
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};
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void freeDerivedSeq(derSeq &derivedG); /* reducible.c */
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