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-rw-r--r--lcc/src/dag.c736
1 files changed, 0 insertions, 736 deletions
diff --git a/lcc/src/dag.c b/lcc/src/dag.c
deleted file mode 100644
index 420cbe7..0000000
--- a/lcc/src/dag.c
+++ /dev/null
@@ -1,736 +0,0 @@
-#include "c.h"
-
-
-#define iscall(op) (generic(op) == CALL \
- || (IR->mulops_calls \
- && (generic(op)==DIV||generic(op)==MOD||generic(op)==MUL) \
- && ( optype(op)==U || optype(op)==I)))
-static Node forest;
-static struct dag {
- struct node node;
- struct dag *hlink;
-} *buckets[16];
-int nodecount;
-static Tree firstarg;
-int assignargs = 1;
-int prunetemps = -1;
-static Node *tail;
-
-static int depth = 0;
-static Node replace(Node);
-static Node prune(Node);
-static Node asgnnode(Symbol, Node);
-static struct dag *dagnode(int, Node, Node, Symbol);
-static Symbol equated(Symbol);
-static void fixup(Node);
-static void labelnode(int);
-static void list(Node);
-static void kill(Symbol);
-static Node node(int, Node, Node, Symbol);
-static void printdag1(Node, int, int);
-static void printnode(Node, int, int);
-static void reset(void);
-static Node tmpnode(Node);
-static void typestab(Symbol, void *);
-static Node undag(Node);
-static Node visit(Node, int);
-static void unlist(void);
-void walk(Tree tp, int tlab, int flab) {
- listnodes(tp, tlab, flab);
- if (forest) {
- Node list = forest->link;
- forest->link = NULL;
- if (!IR->wants_dag)
- list = undag(list);
- code(Gen)->u.forest = list;
- forest = NULL;
- }
- reset();
- deallocate(STMT);
-}
-
-static Node node(int op, Node l, Node r, Symbol sym) {
- int i;
- struct dag *p;
-
- i = (opindex(op)^((unsigned long)sym>>2))&(NELEMS(buckets)-1);
- for (p = buckets[i]; p; p = p->hlink)
- if (p->node.op == op && p->node.syms[0] == sym
- && p->node.kids[0] == l && p->node.kids[1] == r)
- return &p->node;
- p = dagnode(op, l, r, sym);
- p->hlink = buckets[i];
- buckets[i] = p;
- ++nodecount;
- return &p->node;
-}
-static struct dag *dagnode(int op, Node l, Node r, Symbol sym) {
- struct dag *p;
-
- NEW0(p, FUNC);
- p->node.op = op;
- if ((p->node.kids[0] = l) != NULL)
- ++l->count;
- if ((p->node.kids[1] = r) != NULL)
- ++r->count;
- p->node.syms[0] = sym;
- return p;
-}
-Node newnode(int op, Node l, Node r, Symbol sym) {
- return &dagnode(op, l, r, sym)->node;
-}
-static void kill(Symbol p) {
- int i;
- struct dag **q;
-
- for (i = 0; i < NELEMS(buckets); i++)
- for (q = &buckets[i]; *q; )
- if (generic((*q)->node.op) == INDIR &&
- (!isaddrop((*q)->node.kids[0]->op)
- || (*q)->node.kids[0]->syms[0] == p)) {
- *q = (*q)->hlink;
- --nodecount;
- } else
- q = &(*q)->hlink;
-}
-static void reset(void) {
- if (nodecount > 0)
- memset(buckets, 0, sizeof buckets);
- nodecount = 0;
-}
-Node listnodes(Tree tp, int tlab, int flab) {
- Node p = NULL, l, r;
- int op;
-
- assert(tlab || flab || (tlab == 0 && flab == 0));
- if (tp == NULL)
- return NULL;
- if (tp->node)
- return tp->node;
- op = tp->op + sizeop(tp->type->size);
- switch (generic(tp->op)) {
- case AND: { if (depth++ == 0) reset();
- if (flab) {
- listnodes(tp->kids[0], 0, flab);
- listnodes(tp->kids[1], 0, flab);
- } else {
- listnodes(tp->kids[0], 0, flab = genlabel(1));
- listnodes(tp->kids[1], tlab, 0);
- labelnode(flab);
- }
- depth--; } break;
- case OR: { if (depth++ == 0)
- reset();
- if (tlab) {
- listnodes(tp->kids[0], tlab, 0);
- listnodes(tp->kids[1], tlab, 0);
- } else {
- tlab = genlabel(1);
- listnodes(tp->kids[0], tlab, 0);
- listnodes(tp->kids[1], 0, flab);
- labelnode(tlab);
- }
- depth--;
- } break;
- case NOT: { return listnodes(tp->kids[0], flab, tlab); }
- case COND: { Tree q = tp->kids[1];
- assert(tlab == 0 && flab == 0);
- if (tp->u.sym)
- addlocal(tp->u.sym);
- flab = genlabel(2);
- listnodes(tp->kids[0], 0, flab);
- assert(q && q->op == RIGHT);
- reset();
- listnodes(q->kids[0], 0, 0);
- if (forest->op == LABEL+V) {
- equatelab(forest->syms[0], findlabel(flab + 1));
- unlist();
- }
- list(jump(flab + 1));
- labelnode(flab);
- listnodes(q->kids[1], 0, 0);
- if (forest->op == LABEL+V) {
- equatelab(forest->syms[0], findlabel(flab + 1));
- unlist();
- }
- labelnode(flab + 1);
-
- if (tp->u.sym)
- p = listnodes(idtree(tp->u.sym), 0, 0); } break;
- case CNST: { Type ty = unqual(tp->type);
- assert(ty->u.sym);
- if (tlab || flab) {
- assert(ty == inttype);
- if (tlab && tp->u.v.i != 0)
- list(jump(tlab));
- else if (flab && tp->u.v.i == 0)
- list(jump(flab));
- }
- else if (ty->u.sym->addressed)
- p = listnodes(cvtconst(tp), 0, 0);
- else
- p = node(op, NULL, NULL, constant(ty, tp->u.v)); } break;
- case RIGHT: { if ( tp->kids[0] && tp->kids[1]
- && generic(tp->kids[1]->op) == ASGN
- && ((generic(tp->kids[0]->op) == INDIR
- && tp->kids[0]->kids[0] == tp->kids[1]->kids[0])
- || (tp->kids[0]->op == FIELD
- && tp->kids[0] == tp->kids[1]->kids[0]))) {
- assert(tlab == 0 && flab == 0);
- if (generic(tp->kids[0]->op) == INDIR) {
- p = listnodes(tp->kids[0], 0, 0);
- list(p);
- listnodes(tp->kids[1], 0, 0);
- }
- else {
- assert(generic(tp->kids[0]->kids[0]->op) == INDIR);
- list(listnodes(tp->kids[0]->kids[0], 0, 0));
- p = listnodes(tp->kids[0], 0, 0);
- listnodes(tp->kids[1], 0, 0);
- }
- } else if (tp->kids[1]) {
- listnodes(tp->kids[0], 0, 0);
- p = listnodes(tp->kids[1], tlab, flab);
- } else
- p = listnodes(tp->kids[0], tlab, flab); } break;
- case JUMP: { assert(tlab == 0 && flab == 0);
- assert(tp->u.sym == 0);
- assert(tp->kids[0]);
- l = listnodes(tp->kids[0], 0, 0);
- list(newnode(JUMP+V, l, NULL, NULL));
- reset(); } break;
- case CALL: { Tree save = firstarg;
- firstarg = NULL;
- assert(tlab == 0 && flab == 0);
- if (tp->op == CALL+B && !IR->wants_callb) {
- Tree arg0 = tree(ARG+P, tp->kids[1]->type,
- tp->kids[1], NULL);
- if (IR->left_to_right)
- firstarg = arg0;
- l = listnodes(tp->kids[0], 0, 0);
- if (!IR->left_to_right || firstarg) {
- firstarg = NULL;
- listnodes(arg0, 0, 0);
- }
- p = newnode(CALL+V, l, NULL, NULL);
- } else {
- l = listnodes(tp->kids[0], 0, 0);
- r = listnodes(tp->kids[1], 0, 0);
- p = newnode(tp->op == CALL+B ? tp->op : op, l, r, NULL);
- }
- NEW0(p->syms[0], FUNC);
- assert(isptr(tp->kids[0]->type));
- assert(isfunc(tp->kids[0]->type->type));
- p->syms[0]->type = tp->kids[0]->type->type;
- list(p);
- reset();
- cfunc->u.f.ncalls++;
- firstarg = save;
- } break;
- case ARG: { assert(tlab == 0 && flab == 0);
- if (IR->left_to_right)
- listnodes(tp->kids[1], 0, 0);
- if (firstarg) {
- Tree arg = firstarg;
- firstarg = NULL;
- listnodes(arg, 0, 0);
- }
- l = listnodes(tp->kids[0], 0, 0);
- list(newnode(tp->op == ARG+B ? tp->op : op, l, NULL, NULL));
- forest->syms[0] = intconst(tp->type->size);
- forest->syms[1] = intconst(tp->type->align);
- if (!IR->left_to_right)
- listnodes(tp->kids[1], 0, 0); } break;
- case EQ: case NE: case GT: case GE: case LE:
- case LT: { assert(tp->u.sym == 0);
- assert(errcnt || tlab || flab);
- l = listnodes(tp->kids[0], 0, 0);
- r = listnodes(tp->kids[1], 0, 0);
- assert(errcnt || opkind(l->op) == opkind(r->op));
- assert(errcnt || optype(op) == optype(l->op));
- if (tlab)
- assert(flab == 0),
- list(newnode(generic(tp->op) + opkind(l->op), l, r, findlabel(tlab)));
- else if (flab) {
- switch (generic(tp->op)) {
- case EQ: op = NE; break;
- case NE: op = EQ; break;
- case GT: op = LE; break;
- case LT: op = GE; break;
- case GE: op = LT; break;
- case LE: op = GT; break;
- default: assert(0);
- }
- list(newnode(op + opkind(l->op), l, r, findlabel(flab)));
- }
- if (forest && forest->syms[0])
- forest->syms[0]->ref++; } break;
- case ASGN: { assert(tlab == 0 && flab == 0);
- if (tp->kids[0]->op == FIELD) {
- Tree x = tp->kids[0]->kids[0];
- Field f = tp->kids[0]->u.field;
- assert(generic(x->op) == INDIR);
- reset();
- l = listnodes(lvalue(x), 0, 0);
- if (fieldsize(f) < 8*f->type->size) {
- unsigned int fmask = fieldmask(f);
- unsigned int mask = fmask<<fieldright(f);
- Tree q = tp->kids[1];
- if ((q->op == CNST+I && q->u.v.i == 0)
- || (q->op == CNST+U && q->u.v.u == 0))
- q = bittree(BAND, x, cnsttree(unsignedtype, (unsigned long)~mask));
- else if ((q->op == CNST+I && (q->u.v.i&fmask) == fmask)
- || (q->op == CNST+U && (q->u.v.u&fmask) == fmask))
- q = bittree(BOR, x, cnsttree(unsignedtype, (unsigned long)mask));
- else {
- listnodes(q, 0, 0);
- q = bittree(BOR,
- bittree(BAND, rvalue(lvalue(x)),
- cnsttree(unsignedtype, (unsigned long)~mask)),
- bittree(BAND, shtree(LSH, cast(q, unsignedtype),
- cnsttree(unsignedtype, (unsigned long)fieldright(f))),
- cnsttree(unsignedtype, (unsigned long)mask)));
- }
- r = listnodes(q, 0, 0);
- op = ASGN + ttob(q->type);
- } else {
- r = listnodes(tp->kids[1], 0, 0);
- op = ASGN + ttob(tp->kids[1]->type);
- }
- } else {
- l = listnodes(tp->kids[0], 0, 0);
- r = listnodes(tp->kids[1], 0, 0);
- }
- list(newnode(tp->op == ASGN+B ? tp->op : op, l, r, NULL));
- forest->syms[0] = intconst(tp->kids[1]->type->size);
- forest->syms[1] = intconst(tp->kids[1]->type->align);
- if (isaddrop(tp->kids[0]->op)
- && !tp->kids[0]->u.sym->computed)
- kill(tp->kids[0]->u.sym);
- else
- reset();
- p = listnodes(tp->kids[1], 0, 0); } break;
- case BOR: case BAND: case BXOR:
- case ADD: case SUB: case RSH:
- case LSH: { assert(tlab == 0 && flab == 0);
- l = listnodes(tp->kids[0], 0, 0);
- r = listnodes(tp->kids[1], 0, 0);
- p = node(op, l, r, NULL); } break;
- case DIV: case MUL:
- case MOD: { assert(tlab == 0 && flab == 0);
- l = listnodes(tp->kids[0], 0, 0);
- r = listnodes(tp->kids[1], 0, 0);
- p = node(op, l, r, NULL);
- if (IR->mulops_calls && isint(tp->type)) {
- list(p);
- cfunc->u.f.ncalls++;
- } } break;
- case RET: { assert(tlab == 0 && flab == 0);
- l = listnodes(tp->kids[0], 0, 0);
- list(newnode(op, l, NULL, NULL)); } break;
- case CVF: case CVI: case CVP:
- case CVU: { assert(tlab == 0 && flab == 0);
- assert(optype(tp->kids[0]->op) != optype(tp->op) || tp->kids[0]->type->size != tp->type->size);
- l = listnodes(tp->kids[0], 0, 0);
- p = node(op, l, NULL, intconst(tp->kids[0]->type->size));
- } break;
- case BCOM:
- case NEG: { assert(tlab == 0 && flab == 0);
- l = listnodes(tp->kids[0], 0, 0);
- p = node(op, l, NULL, NULL); } break;
- case INDIR: { Type ty = tp->kids[0]->type;
- assert(tlab == 0 && flab == 0);
- l = listnodes(tp->kids[0], 0, 0);
- if (isptr(ty))
- ty = unqual(ty)->type;
- if (isvolatile(ty)
- || (isstruct(ty) && unqual(ty)->u.sym->u.s.vfields))
- p = newnode(tp->op == INDIR+B ? tp->op : op, l, NULL, NULL);
- else
- p = node(tp->op == INDIR+B ? tp->op : op, l, NULL, NULL); } break;
- case FIELD: { Tree q = tp->kids[0];
- if (tp->type == inttype) {
- long n = fieldleft(tp->u.field);
- q = shtree(RSH,
- shtree(LSH, q, cnsttree(inttype, n)),
- cnsttree(inttype, n + fieldright(tp->u.field)));
- } else if (fieldsize(tp->u.field) < 8*tp->u.field->type->size)
- q = bittree(BAND,
- shtree(RSH, q, cnsttree(inttype, (long)fieldright(tp->u.field))),
- cnsttree(unsignedtype, (unsigned long)fieldmask(tp->u.field)));
- assert(tlab == 0 && flab == 0);
- p = listnodes(q, 0, 0); } break;
- case ADDRG:
- case ADDRF: { assert(tlab == 0 && flab == 0);
- p = node(tp->op + sizeop(voidptype->size), NULL, NULL, tp->u.sym);
- } break;
- case ADDRL: { assert(tlab == 0 && flab == 0);
- if (tp->u.sym->temporary)
- addlocal(tp->u.sym);
- p = node(tp->op + sizeop(voidptype->size), NULL, NULL, tp->u.sym); } break;
- default:assert(0);
- }
- tp->node = p;
- return p;
-}
-static void list(Node p) {
- if (p && p->link == NULL) {
- if (forest) {
- p->link = forest->link;
- forest->link = p;
- } else
- p->link = p;
- forest = p;
- }
-}
-static void labelnode(int lab) {
- assert(lab);
- if (forest && forest->op == LABEL+V)
- equatelab(findlabel(lab), forest->syms[0]);
- else
- list(newnode(LABEL+V, NULL, NULL, findlabel(lab)));
- reset();
-}
-static void unlist(void) {
- Node p;
-
- assert(forest);
- assert(forest != forest->link);
- p = forest->link;
- while (p->link != forest)
- p = p->link;
- p->link = forest->link;
- forest = p;
-}
-Tree cvtconst(Tree p) {
- Symbol q = constant(p->type, p->u.v);
- Tree e;
-
- if (q->u.c.loc == NULL)
- q->u.c.loc = genident(STATIC, p->type, GLOBAL);
- if (isarray(p->type)) {
- e = simplify(ADDRG, atop(p->type), NULL, NULL);
- e->u.sym = q->u.c.loc;
- } else
- e = idtree(q->u.c.loc);
- return e;
-}
-void gencode(Symbol caller[], Symbol callee[]) {
- Code cp;
- Coordinate save;
-
- if (prunetemps == -1)
- prunetemps = !IR->wants_dag;
- save = src;
- if (assignargs) {
- int i;
- Symbol p, q;
- cp = codehead.next->next;
- codelist = codehead.next;
- for (i = 0; (p = callee[i]) != NULL
- && (q = caller[i]) != NULL; i++)
- if (p->sclass != q->sclass || p->type != q->type)
- walk(asgn(p, idtree(q)), 0, 0);
- codelist->next = cp;
- cp->prev = codelist;
- }
- if (glevel && IR->stabsym) {
- int i;
- Symbol p, q;
- for (i = 0; (p = callee[i]) != NULL
- && (q = caller[i]) != NULL; i++) {
- (*IR->stabsym)(p);
- if (p->sclass != q->sclass || p->type != q->type)
- (*IR->stabsym)(q);
- }
- swtoseg(CODE);
- }
- cp = codehead.next;
- for ( ; errcnt <= 0 && cp; cp = cp->next)
- switch (cp->kind) {
- case Address: (*IR->address)(cp->u.addr.sym, cp->u.addr.base,
- cp->u.addr.offset); break;
- case Blockbeg: {
- Symbol *p = cp->u.block.locals;
- (*IR->blockbeg)(&cp->u.block.x);
- for ( ; *p; p++)
- if ((*p)->ref != 0.0)
- (*IR->local)(*p);
- else if (glevel) (*IR->local)(*p);
- }
- break;
- case Blockend: (*IR->blockend)(&cp->u.begin->u.block.x); break;
- case Defpoint: src = cp->u.point.src; break;
- case Gen: case Jump:
- case Label: if (prunetemps)
- cp->u.forest = prune(cp->u.forest);
- fixup(cp->u.forest);
- cp->u.forest = (*IR->gen)(cp->u.forest); break;
- case Local: (*IR->local)(cp->u.var); break;
- case Switch: break;
- default: assert(0);
- }
- src = save;
-}
-static void fixup(Node p) {
- for ( ; p; p = p->link)
- switch (generic(p->op)) {
- case JUMP:
- if (specific(p->kids[0]->op) == ADDRG+P)
- p->kids[0]->syms[0] =
- equated(p->kids[0]->syms[0]);
- break;
- case LABEL: assert(p->syms[0] == equated(p->syms[0])); break;
- case EQ: case GE: case GT: case LE: case LT: case NE:
- assert(p->syms[0]);
- p->syms[0] = equated(p->syms[0]);
- }
-}
-static Symbol equated(Symbol p) {
- { Symbol q; for (q = p->u.l.equatedto; q; q = q->u.l.equatedto) assert(p != q); }
- while (p->u.l.equatedto)
- p = p->u.l.equatedto;
- return p;
-}
-void emitcode(void) {
- Code cp;
- Coordinate save;
-
- save = src;
- cp = codehead.next;
- for ( ; errcnt <= 0 && cp; cp = cp->next)
- switch (cp->kind) {
- case Address: break;
- case Blockbeg: if (glevel && IR->stabblock) {
- (*IR->stabblock)('{', cp->u.block.level - LOCAL, cp->u.block.locals);
- swtoseg(CODE);
- }
- break;
- case Blockend: if (glevel && IR->stabblock) {
- Code bp = cp->u.begin;
- foreach(bp->u.block.identifiers, bp->u.block.level, typestab, NULL);
- foreach(bp->u.block.types, bp->u.block.level, typestab, NULL);
- (*IR->stabblock)('}', bp->u.block.level - LOCAL, bp->u.block.locals);
- swtoseg(CODE);
- }
- break;
- case Defpoint: src = cp->u.point.src;
- if (glevel > 0 && IR->stabline) {
- (*IR->stabline)(&cp->u.point.src); swtoseg(CODE); } break;
- case Gen: case Jump:
- case Label: if (cp->u.forest)
- (*IR->emit)(cp->u.forest); break;
- case Local: if (glevel && IR->stabsym) {
- (*IR->stabsym)(cp->u.var);
- swtoseg(CODE);
- } break;
- case Switch: { int i;
- defglobal(cp->u.swtch.table, LIT);
- (*IR->defaddress)(equated(cp->u.swtch.labels[0]));
- for (i = 1; i < cp->u.swtch.size; i++) {
- long k = cp->u.swtch.values[i-1];
- while (++k < cp->u.swtch.values[i])
- assert(k < LONG_MAX),
- (*IR->defaddress)(equated(cp->u.swtch.deflab));
- (*IR->defaddress)(equated(cp->u.swtch.labels[i]));
- }
- swtoseg(CODE);
- } break;
- default: assert(0);
- }
- src = save;
-}
-
-static Node undag(Node forest) {
- Node p;
-
- tail = &forest;
- for (p = forest; p; p = p->link)
- if (generic(p->op) == INDIR) {
- assert(p->count >= 1);
- visit(p, 1);
- if (p->syms[2]) {
- assert(p->syms[2]->u.t.cse);
- p->syms[2]->u.t.cse = NULL;
- addlocal(p->syms[2]);
- }
- } else if (iscall(p->op) && p->count >= 1)
- visit(p, 1);
- else {
- assert(p->count == 0),
- visit(p, 1);
- *tail = p;
- tail = &p->link;
- }
- *tail = NULL;
- return forest;
-}
-static Node replace(Node p) {
- if (p && ( generic(p->op) == INDIR
- && generic(p->kids[0]->op) == ADDRL
- && p->kids[0]->syms[0]->temporary
- && p->kids[0]->syms[0]->u.t.replace)) {
- p = p->kids[0]->syms[0]->u.t.cse;
- if (generic(p->op) == INDIR && isaddrop(p->kids[0]->op))
- p = newnode(p->op, newnode(p->kids[0]->op, NULL, NULL,
- p->kids[0]->syms[0]), NULL, NULL);
- else if (generic(p->op) == ADDRG)
- p = newnode(p->op, NULL, NULL, p->syms[0]);
- else
- assert(0);
- p->count = 1;
- } else if (p) {
- p->kids[0] = replace(p->kids[0]);
- p->kids[1] = replace(p->kids[1]);
- }
- return p;
-}
-static Node prune(Node forest) {
- Node p, *tail = &forest;
- int count = 0;
-
- for (p = forest; p; p = p->link) {
- if (count > 0) {
- p->kids[0] = replace(p->kids[0]);
- p->kids[1] = replace(p->kids[1]);
- }
- if (( generic(p->op) == ASGN
- && generic(p->kids[0]->op) == ADDRL
- && p->kids[0]->syms[0]->temporary
- && p->kids[0]->syms[0]->u.t.cse == p->kids[1])) {
- Symbol tmp = p->kids[0]->syms[0];
- if (!tmp->defined)
- (*IR->local)(tmp);
- tmp->defined = 1;
- if (( generic(p->kids[1]->op) == INDIR
- && isaddrop(p->kids[1]->kids[0]->op)
- && p->kids[1]->kids[0]->syms[0]->sclass == REGISTER)
- || (( generic(p->kids[1]->op) == INDIR
- && isaddrop(p->kids[1]->kids[0]->op)) && tmp->sclass == AUTO)
- || (generic(p->kids[1]->op) == ADDRG && tmp->sclass == AUTO)) {
- tmp->u.t.replace = 1;
- count++;
- continue; /* and omit the assignment */
- }
- }
- /* keep the assignment and other roots */
- *tail = p;
- tail = &(*tail)->link;
- }
- assert(*tail == NULL);
- return forest;
-}
-static Node visit(Node p, int listed) {
- if (p) {
- if (p->syms[2])
- p = tmpnode(p);
- else if ((p->count <= 1 && !iscall(p->op))
- || (p->count == 0 && iscall(p->op))) {
- p->kids[0] = visit(p->kids[0], 0);
- p->kids[1] = visit(p->kids[1], 0);
- }
-
- else if (specific(p->op) == ADDRL+P || specific(p->op) == ADDRF+P) {
- assert(!listed);
- p = newnode(p->op, NULL, NULL, p->syms[0]);
- p->count = 1;
- }
- else if (p->op == INDIR+B) {
- p = newnode(p->op, p->kids[0], NULL, NULL);
- p->count = 1;
- p->kids[0] = visit(p->kids[0], 0);
- p->kids[1] = visit(p->kids[1], 0);
- }
- else {
- p->kids[0] = visit(p->kids[0], 0);
- p->kids[1] = visit(p->kids[1], 0);
- p->syms[2] = temporary(REGISTER, btot(p->op, opsize(p->op)));
- assert(!p->syms[2]->defined);
- p->syms[2]->ref = 1;
- p->syms[2]->u.t.cse = p;
-
- *tail = asgnnode(p->syms[2], p);
- tail = &(*tail)->link;
- if (!listed)
- p = tmpnode(p);
- };
- }
- return p;
-}
-static Node tmpnode(Node p) {
- Symbol tmp = p->syms[2];
-
- assert(tmp);
- if (--p->count == 0)
- p->syms[2] = NULL;
- p = newnode(INDIR + ttob(tmp->type),
- newnode(ADDRL + ttob(voidptype), NULL, NULL, tmp), NULL, NULL);
- p->count = 1;
- return p;
-}
-static Node asgnnode(Symbol tmp, Node p) {
- p = newnode(ASGN + ttob(tmp->type),
- newnode(ADDRL + ttob(voidptype), NULL, NULL, tmp), p, NULL);
- p->syms[0] = intconst(tmp->type->size);
- p->syms[1] = intconst(tmp->type->align);
- return p;
-}
-/* printdag - print dag p on fd, or the node list if p == 0 */
-void printdag(Node p, int fd) {
- FILE *f = fd == 1 ? stdout : stderr;
-
- printed(0);
- if (p == 0) {
- if ((p = forest) != NULL)
- do {
- p = p->link;
- printdag1(p, fd, 0);
- } while (p != forest);
- } else if (*printed(nodeid((Tree)p)))
- fprint(f, "node'%d printed above\n", nodeid((Tree)p));
- else
- printdag1(p, fd, 0);
-}
-
-/* printdag1 - recursively print dag p */
-static void printdag1(Node p, int fd, int lev) {
- int id, i;
-
- if (p == 0 || *printed(id = nodeid((Tree)p)))
- return;
- *printed(id) = 1;
- for (i = 0; i < NELEMS(p->kids); i++)
- printdag1(p->kids[i], fd, lev + 1);
- printnode(p, fd, lev);
-}
-
-/* printnode - print fields of dag p */
-static void printnode(Node p, int fd, int lev) {
- if (p) {
- FILE *f = fd == 1 ? stdout : stderr;
- int i, id = nodeid((Tree)p);
- fprint(f, "%c%d%s", lev == 0 ? '\'' : '#', id,
- &" "[id < 10 ? 0 : id < 100 ? 1 : 2]);
- fprint(f, "%s count=%d", opname(p->op), p->count);
- for (i = 0; i < NELEMS(p->kids) && p->kids[i]; i++)
- fprint(f, " #%d", nodeid((Tree)p->kids[i]));
- if (generic(p->op) == CALL && p->syms[0] && p->syms[0]->type)
- fprint(f, " {%t}", p->syms[0]->type);
- else
- for (i = 0; i < NELEMS(p->syms) && p->syms[i]; i++)
- if (p->syms[i]->name)
- fprint(f, " %s", p->syms[i]->name);
- else
- fprint(f, " %p", p->syms[i]);
- fprint(f, "\n");
- }
-}
-
-/* typestab - emit stab entries for p */
-static void typestab(Symbol p, void *cl) {
- if (!isfunc(p->type) && (p->sclass == EXTERN || p->sclass == STATIC) && IR->stabsym)
- (*IR->stabsym)(p);
- else if ((p->sclass == TYPEDEF || p->sclass == 0) && IR->stabtype)
- (*IR->stabtype)(p);
-}
-
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-29 17:33:30 +0000