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- /*
- * File: locIdent.c
- * Purpose: support routines for high-level local identifier definitions.
- * Date: October 1993
- * (C) Cristina Cifuentes
- */
- #include <cstring>
- #include "locident.h"
- #include "dcc.h"
- ID::ID() : type(TYPE_UNKNOWN),illegal(false),loc(STK_FRAME),hasMacro(false)
- {
- name[0]=0;
- macro[0]=0;
- memset(&id,0,sizeof(id));
- }
- ID::ID(hlType t, frameType f) : type(t),illegal(false),hasMacro(false)
- {
- name[0]=0;
- macro[0]=0;
- memset(&id,0,sizeof(id));
- loc=f;
- }
- #define LOCAL_ID_DELTA 25
- #define IDX_ARRAY_DELTA 5
- /* Creates a new identifier node of type t and returns it.
- * Arguments: locSym : local long symbol table
- * t : type of LONG identifier
- * f : frame where this variable is located
- * ix : index into icode array where this var is used */
- void LOCAL_ID::newIdent(hlType t, frameType f)
- {
- ID newid(t,f);
- id_arr.push_back(newid);
- }
- /* Creates a new register identifier node of TYPE_BYTE_(UN)SIGN or
- * TYPE_WORD_(UN)SIGN type. Returns the index to this new entry. */
- int LOCAL_ID::newByteWordReg(hlType t, eReg regi)
- {
- int idx;
- /* Check for entry in the table */
- auto found=std::find_if(id_arr.begin(),id_arr.end(),[t,regi](ID &el)->bool {
- return ((el.type == t) && (el.id.regi == regi));
- });
- if(found!=id_arr.end())
- return found-id_arr.begin();
- /* Not in table, create new identifier */
- newIdent (t, REG_FRAME);
- idx = id_arr.size() - 1;
- id_arr[idx].id.regi = regi;
- return (idx);
- }
- /* Flags the entry associated with the offset off to illegal, as this
- * offset is part of a long stack variable.
- * Note: it is easier enough to remove this entry by moving the rest of
- * the array 1 position. The problem is that indexes into this
- * array have already been saved in several positions; therefore,
- * flagging this entry as illegal is all that can be done. */
- void LOCAL_ID::flagByteWordId (int off)
- {
- int idx;
- auto found=std::find_if(id_arr.begin(),id_arr.end(),[off](ID &en)->bool {
- //if (((en.type == TYPE_WORD_SIGN) || (en.type == TYPE_BYTE_SIGN)) &&
- if ((en.typeBitsize()<=16) &&
- (en.id.bwId.off == off) && (en.id.bwId.regOff == 0))
- return true;
- return false;
- });
- if(found==id_arr.end())
- {
- printf("No entry to flag as invalid in LOCAL_ID::flagByteWordId \n");
- return;
- }
- found->illegal = true;
- }
- /* Creates a new stack identifier node of TYPE_BYTE_(UN)SIGN or
- * TYPE_WORD_(UN)SIGN type. Returns the index to this new entry. */
- int LOCAL_ID::newByteWordStk(hlType t, int off, uint8_t regOff)
- {
- int idx;
- /* Check for entry in the table */
- auto found=std::find_if(id_arr.begin(),id_arr.end(),[off,regOff](ID &el)->bool {
- if ((el.id.bwId.off == off) && (el.id.bwId.regOff == regOff))
- return true;
- return false;
- });
- if(found!=id_arr.end())
- return found-id_arr.begin(); //return Index to found element
- /* Not in table, create new identifier */
- newIdent (t, STK_FRAME);
- idx = id_arr.size() - 1;
- id_arr[idx].id.bwId.regOff = regOff;
- id_arr[idx].id.bwId.off = off;
- return (idx);
- }
- /* Checks if the entry exists in the locSym, if so, returns the idx to this
- * entry; otherwise creates a new global identifier node of type
- * TYPE_WORD_(UN)SIGN and returns the index to this new entry.
- * Arguments: locSym : ptr to the local symbol table
- * seg: segment value for global variable
- * off: offset from segment
- * regi: indexed register into global variable
- * ix: index into icode array
- * t: HIGH_LEVEL type */
- int LOCAL_ID::newIntIdx(int16_t seg, int16_t off, eReg regi, int ix, hlType t)
- {
- int idx;
- /* Check for entry in the table */
- for (idx = 0; idx < id_arr.size(); idx++)
- {
- if (/*(locSym->id[idx].type == t) && Not checking type */
- (id_arr[idx].id.bwGlb.seg == seg) &&
- (id_arr[idx].id.bwGlb.off == off) &&
- (id_arr[idx].id.bwGlb.regi == regi))
- return (idx);
- }
- /* Not in the table, create new identifier */
- newIdent (t, GLB_FRAME);
- idx = id_arr.size() - 1;
- id_arr[idx].id.bwGlb.seg = seg;
- id_arr[idx].id.bwGlb.off = off;
- id_arr[idx].id.bwGlb.regi = regi;
- return (idx);
- }
- /* Checks if the entry exists in the locSym, if so, returns the idx to this
- * entry; otherwise creates a new register identifier node of type
- * TYPE_LONG_(UN)SIGN and returns the index to this new entry. */
- int LOCAL_ID::newLongReg(hlType t, eReg regH, eReg regL, iICODE ix_)
- {
- size_t idx;
- //iICODE ix_;
- /* Check for entry in the table */
- for (idx = 0; idx < id_arr.size(); idx++)
- {
- ID &entry(id_arr[idx]);
- if (/*(locSym->id[idx].type == t) && Not checking type */
- (entry.id.longId.h == regH) &&
- (entry.id.longId.l == regL))
- {
- /* Check for occurrence in the list */
- if (entry.idx.inList(ix_))
- return (idx);
- else
- {
- /* Insert icode index in list */
- entry.idx.push_back(ix_);
- //entry.idx.insert(ix_);
- return (idx);
- }
- }
- }
- /* Not in the table, create new identifier */
- newIdent (t, REG_FRAME);
- id_arr[id_arr.size()-1].idx.push_back(ix_);//insert(ix_);
- idx = id_arr.size() - 1;
- id_arr[idx].id.longId.h = regH;
- id_arr[idx].id.longId.l = regL;
- return (idx);
- }
- /* Checks if the entry exists in the locSym, if so, returns the idx to this
- * entry; otherwise creates a new global identifier node of type
- * TYPE_LONG_(UN)SIGN and returns the index to this new entry. */
- int LOCAL_ID::newLongGlb(int16_t seg, int16_t offH, int16_t offL,hlType t)
- {
- size_t idx;
- /* Check for entry in the table */
- for (idx = 0; idx < id_arr.size(); idx++)
- {
- if (/*(locSym->id[idx].type == t) && Not checking type */
- (id_arr[idx].id.longGlb.seg == seg) &&
- (id_arr[idx].id.longGlb.offH == offH) &&
- (id_arr[idx].id.longGlb.offL == offL))
- return (idx);
- }
- /* Not in the table, create new identifier */
- newIdent (t, GLB_FRAME);
- idx = id_arr.size() - 1;
- id_arr[idx].id.longGlb.seg = seg;
- id_arr[idx].id.longGlb.offH = offH;
- id_arr[idx].id.longGlb.offL = offL;
- return (idx);
- }
- /* Checks if the entry exists in the locSym, if so, returns the idx to this
- * entry; otherwise creates a new global identifier node of type
- * TYPE_LONG_(UN)SIGN and returns the index to this new entry. */
- int LOCAL_ID::newLongIdx( int16_t seg, int16_t offH, int16_t offL,uint8_t regi, hlType t)
- {
- size_t idx;
- /* Check for entry in the table */
- for (idx = 0; idx < id_arr.size(); idx++)
- {
- if (/*(locSym->id[idx].type == t) && Not checking type */
- (id_arr[idx].id.longGlb.seg == seg) &&
- (id_arr[idx].id.longGlb.offH == offH) &&
- (id_arr[idx].id.longGlb.offL == offL) &&
- (id_arr[idx].id.longGlb.regi == regi))
- return (idx);
- }
- /* Not in the table, create new identifier */
- newIdent (t, GLB_FRAME);
- idx = id_arr.size() - 1;
- id_arr[idx].id.longGlb.seg = seg;
- id_arr[idx].id.longGlb.offH = offH;
- id_arr[idx].id.longGlb.offL = offL;
- id_arr[idx].id.longGlb.regi = regi;
- return (idx);
- }
- /* Creates a new stack identifier node of type TYPE_LONG_(UN)SIGN.
- * Returns the index to this entry. */
- int LOCAL_ID::newLongStk(hlType t, int offH, int offL)
- {
- size_t idx;
- /* Check for entry in the table */
- for (idx = 0; idx < id_arr.size(); idx++)
- {
- if ((id_arr[idx].type == t) &&
- (id_arr[idx].id.longStkId.offH == offH) &&
- (id_arr[idx].id.longStkId.offL == offL))
- return (idx);
- }
- /* Not in the table; flag as invalid offH and offL */
- flagByteWordId (offH);
- flagByteWordId (offL);
- /* Create new identifier */
- newIdent (t, STK_FRAME);
- idx = id_arr.size() - 1;
- id_arr[idx].id.longStkId.offH = offH;
- id_arr[idx].id.longStkId.offL = offL;
- return (idx);
- }
- /* Returns the index to an appropriate long identifier.
- * Note: long constants should be checked first and stored as a long integer
- * number in an expression record. */
- int LOCAL_ID::newLong(opLoc sd, iICODE pIcode, hlFirst f, iICODE ix,operDu du, iICODE atOffset)
- {
- size_t idx;
- LLOperand *pmH, *pmL;
- // iICODE atOffset(pIcode);
- // advance(atOffset,off);
- if (f == LOW_FIRST)
- {
- pmL = (sd == SRC) ? &pIcode->ll()->src : &pIcode->ll()->dst;
- pmH = (sd == SRC) ? &atOffset->ll()->src : &atOffset->ll()->dst;
- }
- else /* HIGH_FIRST */
- {
- pmH = (sd == SRC) ? &pIcode->ll()->src : &pIcode->ll()->dst;
- pmL = (sd == SRC) ? &atOffset->ll()->src : &atOffset->ll()->dst;
- }
- if (pmL->regi == 0) /* global variable */
- idx = newLongGlb(pmH->segValue, pmH->off, pmL->off, TYPE_LONG_SIGN);
- else if (pmL->regi < INDEX_BX_SI) /* register */
- {
- idx = newLongReg(TYPE_LONG_SIGN, pmH->regi, pmL->regi, ix);
- if (f == HIGH_FIRST)
- pIcode->setRegDU( pmL->regi, du); /* low part */
- else
- pIcode->setRegDU( pmH->regi, du); /* high part */
- }
- else if (pmL->off) { /* offset */
- if ((pmL->seg == rSS) && (pmL->regi == INDEX_BP)) /* idx on bp */
- idx = newLongStk(TYPE_LONG_SIGN, pmH->off, pmL->off);
- else if ((pmL->seg == rDS) && (pmL->regi == INDEX_BX)) /* bx */
- { /* glb var indexed on bx */
- printf("Bx indexed global, BX is an unused parameter to newLongIdx\n");
- idx = newLongIdx(pmH->segValue, pmH->off, pmL->off,rBX,TYPE_LONG_SIGN);
- pIcode->setRegDU( rBX, eUSE);
- }
- else /* idx <> bp, bx */
- printf ("long not supported, idx <> bp\n");
- }
- else /* (pm->regi >= INDEXBASE && pm->off = 0) => indexed && no off */
- printf ("long not supported, idx && no off\n");
- return (idx);
- }
- /* Checks whether the long stack identifier is equivalent to the source or
- * destination operands of pIcode and pIcode+1 (ie. these are LOW_LEVEL
- * icodes at present). If so, returns the rhs and lhs of this instruction.
- * Arguments: longId : long stack identifier
- * pIcode : ptr to first LOW_LEVEL icode instruction
- * i : idx into local identifier table for longId
- * idx : idx into icode array
- * pProc : ptr to current procedure record
- * rhs, lhs : return expressions if successful. */
- boolT checkLongEq (LONG_STKID_TYPE longId, iICODE pIcode, int i, Function * pProc, Assignment &asgn, iICODE atOffset)
- {
- LLOperand *pmHdst, *pmLdst, *pmHsrc, *pmLsrc; /* pointers to LOW_LEVEL icodes */
- pmHdst = &pIcode->ll()->dst;
- pmLdst = &atOffset->ll()->dst;
- pmHsrc = &pIcode->ll()->src;
- pmLsrc = &atOffset->ll()->src;
- if ((longId.offH == pmHdst->off) && (longId.offL == pmLdst->off))
- {
- asgn.lhs = COND_EXPR::idLongIdx (i);
- if ( not pIcode->ll()->testFlags(NO_SRC) )
- {
- asgn.rhs = COND_EXPR::idLong (&pProc->localId, SRC, pIcode, HIGH_FIRST, pIcode, eUSE, atOffset);
- }
- return true;
- }
- else if ((longId.offH == pmHsrc->off) && (longId.offL == pmLsrc->off))
- {
- asgn.lhs = COND_EXPR::idLong (&pProc->localId, DST, pIcode, HIGH_FIRST, pIcode,eDEF, atOffset);
- asgn.rhs = COND_EXPR::idLongIdx (i);
- return true;
- }
- return false;
- }
- /* Checks whether the long stack identifier is equivalent to the source or
- * destination operands of pIcode and pIcode+1 (ie. these are LOW_LEVEL
- * icodes at present). If so, returns the rhs and lhs of this instruction.
- * Arguments: longId : long stack identifier
- * pIcode : ptr to first LOW_LEVEL icode instruction
- * i : idx into local identifier table for longId
- * idx : idx into icode array
- * pProc : ptr to current procedure record
- * rhs, lhs : return expressions if successful. */
- boolT checkLongRegEq (LONGID_TYPE longId, iICODE pIcode, int i,
- Function * pProc, Assignment &asgn, iICODE atOffset)
- {
- LLOperand *pmHdst, *pmLdst, *pmHsrc, *pmLsrc; /* pointers to LOW_LEVEL icodes */
- // iICODE atOffset(pIcode);
- // advance(atOffset,off);
- pmHdst = &pIcode->ll()->dst;
- pmLdst = &atOffset->ll()->dst;
- pmHsrc = &pIcode->ll()->src;
- pmLsrc = &atOffset->ll()->src;
- if ((longId.h == pmHdst->regi) && (longId.l == pmLdst->regi))
- {
- asgn.lhs = COND_EXPR::idLongIdx (i);
- if ( not pIcode->ll()->testFlags(NO_SRC) )
- {
- asgn.rhs = COND_EXPR::idLong (&pProc->localId, SRC, pIcode, HIGH_FIRST, pIcode, eUSE, atOffset);
- }
- return true;
- }
- else if ((longId.h == pmHsrc->regi) && (longId.l == pmLsrc->regi))
- {
- asgn.lhs = COND_EXPR::idLong (&pProc->localId, DST, pIcode, HIGH_FIRST, pIcode, eDEF, atOffset);
- asgn.rhs = COND_EXPR::idLongIdx (i);
- return true;
- }
- return false;
- }
- /* Given an index into the local identifier table for a long register
- * variable, determines whether regi is the high or low part, and returns
- * the other part */
- eReg otherLongRegi (eReg regi, int idx, LOCAL_ID *locTbl)
- {
- ID *id;
- id = &locTbl->id_arr[idx];
- if ((id->loc == REG_FRAME) && ((id->type == TYPE_LONG_SIGN) ||
- (id->type == TYPE_LONG_UNSIGN)))
- {
- if (id->id.longId.h == regi)
- return (id->id.longId.l);
- else if (id->id.longId.l == regi)
- return (id->id.longId.h);
- }
- return rUNDEF; // Cristina: please check this!
- }
- /* Checks if the registers regL and regH have been used independently in
- * the local identifier table. If so, macros for these registers are
- * placed in the local identifier table, as these registers belong to a
- * long register identifier. */
- void LOCAL_ID::propLongId (uint8_t regL, uint8_t regH, const char *name)
- {
- int i;
- ID *_id;
- for (i = 0; i < id_arr.size(); i++)
- {
- _id = &id_arr[i];
- if (_id->typeBitsize()==16)
- {
- if (_id->id.regi == regL)
- {
- strcpy (_id->name, name);
- strcpy (_id->macro, "LO");
- _id->hasMacro = true;
- _id->illegal = true;
- }
- else if (_id->id.regi == regH)
- {
- strcpy (_id->name, name);
- strcpy (_id->macro, "HI");
- _id->hasMacro = true;
- _id->illegal = true;
- }
- }
- }
- }
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