/*-----------------------------------------------------------------*/
static symbol *
createStackSpil (symbol * sym)
{
symbol *sloc = NULL;
struct dbuf_s dbuf;
D (D_ALLOC, ("createStackSpil: for sym %p %s\n", sym, sym->name));
/* first go try and find a free one that is already
existing on the stack */
if (applyToSet (_G.stackSpil, isFreeSTM8, &sloc, sym))
{
/* found a free one : just update & return */
sym->usl.spillLoc = sloc;
sym->stackSpil = 1;
sloc->isFree = 0;
addSetHead (&sloc->usl.itmpStack, sym);
D (D_ALLOC, ("createStackSpil: found existing\n"));
return sym;
}
/* could not then have to create one , this is the hard part
we need to allocate this on the stack : this is really a
hack!! but cannot think of anything better at this time */
dbuf_init (&dbuf, 128);
dbuf_printf (&dbuf, "sloc%d", _G.slocNum++);
sloc = newiTemp (dbuf_c_str (&dbuf));
dbuf_destroy (&dbuf);
/* set the type to the spilling symbol */
sloc->type = copyLinkChain (sym->type);
sloc->etype = getSpec (sloc->type);
SPEC_SCLS (sloc->etype) = S_AUTO;
SPEC_EXTR (sloc->etype) = 0;
SPEC_STAT (sloc->etype) = 0;
SPEC_VOLATILE (sloc->etype) = 0;
allocLocal (sloc);
sloc->isref = 1; /* to prevent compiler warning */
wassertl (currFunc, "Local variable used outside of function.");
/* if it is on the stack then update the stack */
if (IN_STACK (sloc->etype))
{
if (currFunc)
currFunc->stack += getSize (sloc->type);
_G.stackExtend += getSize (sloc->type);
}
else
{
_G.dataExtend += getSize (sloc->type);
}
/* add it to the stackSpil set */
addSetHead (&_G.stackSpil, sloc);
sym->usl.spillLoc = sloc;
sym->stackSpil = 1;
/* add it to the set of itempStack set
of the spill location */
addSetHead (&sloc->usl.itmpStack, sym);
D (D_ALLOC, ("createStackSpil: created new\n"));
return sym;
}
/*-----------------------------------------------------------------*/
void
allocParms (value * val)
{
value *lval;
int pNum = 1;
for (lval = val; lval; lval = lval->next, pNum++)
{
/* check the declaration */
checkDecl (lval->sym, 0);
/* if this a register parm then allocate
it as a local variable by adding it
to the first block we see in the body */
if (IS_REGPARM (lval->etype))
continue;
/* mark it as my parameter */
lval->sym->ismyparm = 1;
lval->sym->localof = currFunc;
/* if automatic variables r 2b stacked */
if (options.stackAuto || IFFUNC_ISREENT (currFunc->type))
{
if (lval->sym)
lval->sym->onStack = 1;
/* choose which stack 2 use */
/* use xternal stack */
if (options.useXstack)
{
/* PENDING: stack direction support */
SPEC_OCLS (lval->etype) = SPEC_OCLS (lval->sym->etype) = xstack;
SPEC_STAK (lval->etype) = SPEC_STAK (lval->sym->etype) = lval->sym->stack =
xstackPtr - getSize (lval->type);
xstackPtr -= getSize (lval->type);
}
else
{ /* use internal stack */
SPEC_OCLS (lval->etype) = SPEC_OCLS (lval->sym->etype) = istack;
if (port->stack.direction > 0)
{
SPEC_STAK (lval->etype) = SPEC_STAK (lval->sym->etype) = lval->sym->stack =
stackPtr - (FUNC_REGBANK (currFunc->type) ? port->stack.bank_overhead : 0) -
getSize (lval->type) -
(FUNC_ISISR (currFunc->type) ? port->stack.isr_overhead : 0);
stackPtr -= getSize (lval->type);
}
else
{
/* This looks like the wrong order but it turns out OK... */
/* PENDING: isr, bank overhead, ... */
SPEC_STAK (lval->etype) = SPEC_STAK (lval->sym->etype) = lval->sym->stack =
stackPtr +
((IFFUNC_ISBANKEDCALL (currFunc->type) && !SPEC_STAT(getSpec(currFunc->etype)))? port->stack.banked_overhead : 0) +
(FUNC_ISISR (currFunc->type) ? port->stack.isr_overhead : 0) +
0;
stackPtr += getSize (lval->type);
}
}
allocIntoSeg (lval->sym);
}
else
{ /* allocate them in the automatic space */
/* generate a unique name */
SNPRINTF (lval->sym->rname, sizeof(lval->sym->rname),
"%s%s_PARM_%d", port->fun_prefix, currFunc->name, pNum);
strncpyz (lval->name, lval->sym->rname, sizeof(lval->name));
/* if declared in specific storage */
if (allocDefault (lval->sym))
{
SPEC_OCLS (lval->etype) = SPEC_OCLS (lval->sym->etype);
continue;
}
/* otherwise depending on the memory model */
SPEC_OCLS (lval->etype) = SPEC_OCLS (lval->sym->etype) =
port->mem.default_local_map;
if (options.model == MODEL_SMALL)
{
/* note here that we put it into the overlay segment
first, we will remove it from the overlay segment
after the overlay determination has been done */
if (!options.noOverlay)
{
SPEC_OCLS (lval->etype) = SPEC_OCLS (lval->sym->etype) =
overlay;
}
}
else if (options.model == MODEL_MEDIUM)
{
SPEC_SCLS (lval->etype) = S_PDATA;
}
else
{
SPEC_SCLS (lval->etype) = S_XDATA;
}
allocIntoSeg (lval->sym);
}
}
return;
}
