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/* dbnode.c - print debug messages for operators for bcc */
/* Copyright (C) 1992 Bruce Evans */
#include "bcc.h"
#ifdef DBNODE
#include "gencode.h"
#include "reg.h"
#include "sc.h"
#include "scan.h"
#include "type.h"
PRIVATE char *opname[LASTOP - FIRSTOP + 1] = /* operator names */
{ /* order must agree with op.h */
"cond?",
"or",
"eor",
"and",
"gt", "lt",
"add",
"div", "mod",
"lognot", "not",
"strucelt", "strucptr",
"eq",
"addab", "andab", "divab", "eorab", "modab", "mulab", "orab",
"slab", "srab", "subab",
"comma",
"cond:",
"logor",
"logand",
"logeq",
"ne",
"ge", "le",
"sl", "sr",
"sub",
"mul",
"address", "cast", "indirect", "neg",
"predec", "preinc", "postdec", "postinc",
"func", "list", "rootlist",
"leaf",
"ptraddab", "ptradd", "ptrsub",
};
FORWARD void outindchars P((int byte, indn_pt count));
PUBLIC void dbitem(item)
struct symstruct *item;
{
dbtype(item->type);
if (item->storage == NOSTORAGE)
{
outbyte(' ');
outstr(item->name.namep + 2);
outstr(" (offset ");
outshex(item->offset.offi);
outbyte(')');
return;
}
if (item->storage == LOCAL)
{
outbyte(' ');
if (item->flags == TEMP)
outstr("(temp)");
else
outstr(item->name.namep);
}
outstr(" = ");
outindchars('[', item->indcount);
switch (item->storage)
{
case CONSTANT:
outstr("const ");
if (item->type->scalar & RSCALAR)
outstr("(whatever)");
else if (item->type->scalar & UNSIGNED)
outuvalue((uvalue_t) item->offset.offv);
else
outvalue(item->offset.offv);
break;
case BREG:
case DREG:
case INDREG0:
case INDREG1:
case INDREG2:
#ifdef DATREG1
case DATREG1:
#endif
#ifdef DATREG2
case DATREG2:
#endif
outregname(item->storage);
if (item->level == OFFKLUDGELEVEL)
{
outplus();
if (item->flags & LABELLED)
outlabel(item->name.label);
else
outccname(item->name.namep);
}
break;
case LOCAL:
outbyte('S');
if (sp <= 0)
outplus();
outshex(-sp);
break;
case GLOBAL:
if (item->flags & LABELLED)
outlabel(item->name.label);
else
outstr(item->name.namep);
break;
default:
outstr("bad storage (");
outhex((uoffset_T) item->storage);
outbyte(')');
outstr(" offset ");
}
if (item->storage != CONSTANT)
{
if (item->offset.offi >= 0)
outplus();
outshex(item->offset.offi);
}
outindchars(']', item->indcount);
}
PUBLIC void dbtype(type)
struct typestruct *type;
{
for ( ; type != NULL; type = type->nexttype)
{
outbyte(' ');
switch (type->constructor)
{
case ARRAY:
outbyte('[');
outhex(type->typesize / type->nexttype->typesize);
outbyte(']');
break;
case FUNCTION:
outstr("()");
break;
case POINTER:
outbyte('*');
break;
case STRUCTU:
outstr("struct ");
default:
if (type->scalar & UNSIGNED)
outstr("unsigned ");
outstr(type->tname);
break;
}
}
}
PUBLIC void dbnode(exp) /* sub-nodes must be leaves */
struct nodestruct *exp;
{
if (!dbnodeon)
return;
outstr("! Debug: ");
if (exp->tag < FIRSTOP && exp->tag > LASTOP)
outstr("unknown op");
else
outstr(opname[exp->tag - FIRSTOP]);
if (exp->right != NULL && exp->tag != FUNCOP &&
exp->tag != LISTOP && exp->tag != ROOTLISTOP)
{
dbitem(exp->right->left.symptr);
outstr(" to");
}
dbitem(exp->left.nodeptr->left.symptr);
outstr(" (used reg = ");
if (reguse & INDREG0)
outregname(INDREG0);
if (reguse & INDREG1)
outregname(INDREG1);
if (reguse & INDREG2)
outregname(INDREG2);
outnstr(")");
}
PUBLIC void dbnodeswap()
{
if (dbnodeon)
outnstr("! Debug: expression subtree swapping");
}
PRIVATE void outindchars(byte, count)
int byte;
indn_pt count;
{
while (count--)
outbyte(byte);
}
#endif /* DBNODE */
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