add scratch arena to Proc

1 files changed, 21 insertions, 20 deletions

diff --git a/main.c b/main.c
index c83245b..1787245 100644
--- a/main.c
+++ b/main.c
@@ -75,7 +75,7 @@ Type parse_type(Lexer *l, Proc *proc) {
 	if (l->tok == TOK_DEREF) {
 		lex_next(l);
 		t.t = T_PTR;
-		t.next = new(&proc->arena, Type);
+		t.next = new(&proc->perm, Type);
 		*t.next = parse_type(l, proc);
 		return t;
 	}
@@ -125,13 +125,14 @@ void parse_stmt(Lexer *l, Proc *p);
 /* TODO: return node from this! */
 void parse_block(Lexer *l, Proc *p, ScopeNameList *nl) {
 	lex_next(l);
+	arena_reset(&p->scratch);
 	scope_push(&p->scope, p);
 	while (l->tok != TOK_RBRACE) {
 		lex_expected_not(l, TM_EOF);
 		parse_stmt(l, p);
 	}
 	if (nl) {
-		scope_collect(&p->scope, p, nl, &p->arena);
+		scope_collect(&p->scope, p, nl, &p->scratch);
 	}
 	scope_pop(&p->scope, p);
 	lex_expected(l, TM_RBRACE);
@@ -150,12 +151,12 @@ void parse_assign(Lexer *l, Proc *p) {
 	Node *e = parse_expr(l, p, &b->node->type);
 	if (node_uninit(e)) {
 		lex_error_at(l, e->src_pos, LE_ERROR,
-				str_fmt(&p->arena, "uninitialized %S",
-					type_desc(&e->type, &p->arena)));
+				str_fmt(&p->scratch, "uninitialized %S",
+					type_desc(&e->type, &p->scratch)));
 	} else if (node_maybe_uninit(e)) {
 		lex_error_at(l, e->src_pos, LE_WARN,
-				str_fmt(&p->arena, "possibly uninitialized %S",
-					type_desc(&e->type, &p->arena)));
+				str_fmt(&p->scratch, "possibly uninitialized %S",
+					type_desc(&e->type, &p->scratch)));
 	}
 	scope_update(b, e, p);
 }
@@ -249,8 +250,8 @@ void parse_if(Lexer *l, Proc *p) {
 		.type = { .lvl = T_TOP, .t = T_TUPLE },
 		.tuple = { 0 }
 	};
-	ZDA_PUSH(&p->arena, &if_node->val.tuple, (Value) { .type = { .lvl = T_CTRL, .t = T_NONE } });
-	ZDA_PUSH(&p->arena, &if_node->val.tuple, (Value) { .type = { .lvl = T_CTRL, .t = T_NONE } });
+	ZDA_PUSH(&p->perm, &if_node->val.tuple, (Value) { .type = { .lvl = T_CTRL, .t = T_NONE } });
+	ZDA_PUSH(&p->perm, &if_node->val.tuple, (Value) { .type = { .lvl = T_CTRL, .t = T_NONE } });
 	if_node = node_peephole(if_node, p, l);
 	node_add(p, if_node, p->keepalive);
 	Node *if_true = node_new(p, N_PROJ, if_node);
@@ -265,7 +266,7 @@ void parse_if(Lexer *l, Proc *p) {
 	node_add(p, if_true, p->keepalive);
 	node_add(p, if_false, p->keepalive);
 	ScopeNameList scope_before = { 0 }, scope_true = { 0 }, scope_false = { 0 };
-	scope_collect(&p->scope, p, &scope_before, &p->arena);
+	scope_collect(&p->scope, p, &scope_before, &p->scratch);
 	if (cond->type.lvl == T_CONST) {
 		if (cond->val.i) if_false->type.lvl = T_XCTRL;
 		else if_true->type.lvl = T_XCTRL;
@@ -373,7 +374,7 @@ void parse_args_list(Lexer *l, Proc *proc) {
 			Node *proj = node_new(proc, N_PROJ, proc->start);
 			proj->type = v.type;
 			proj->val.i = i++;
-			ZDA_PUSH(&proc->arena, &start->val.tuple, v);
+			ZDA_PUSH(&proc->perm, &start->val.tuple, v);
 			scope_bind(&proc->scope, idbuf[j].name, proj, idbuf[j].pos, proc);
 		}
 		id = 0;
@@ -444,7 +445,7 @@ void proc_opt_fwd(Proc *p, Lexer *l, Node *n) {
 void proc_opt(Proc *p, Lexer *l) {
 	if (p->stop->in.len == 0) {
 		if (p->ret_type.t != T_NONE) {
-			lex_error(l, LE_ERROR, str_fmt(&p->arena, "no return statement in function expecting %S", type_desc(&p->ret_type, &p->arena)));
+			lex_error(l, LE_ERROR, str_fmt(&p->scratch, "no return statement in function expecting %S", type_desc(&p->ret_type, &p->scratch)));
 		}
 	}
 	for (int i = 0; i < p->start->out.len; i++) {
@@ -489,12 +490,12 @@ Proc *parse_proc(Lexer *l, Unit *u) {
 void uninit_check(Lexer *l, Proc *p, Node *n, LexSpan pos) {
 	if (node_uninit(n)) {
 		lex_error_at(l, pos, LE_ERROR,
-				str_fmt(&p->arena, "uninitialized %S",
-					type_desc(&n->type, &p->arena)));
+				str_fmt(&p->scratch, "uninitialized %S",
+					type_desc(&n->type, &p->scratch)));
 	} else if (node_maybe_uninit(n)) {
 		lex_error_at(l, pos, LE_WARN,
-				str_fmt(&p->arena, "possibly uninitialized %S",
-					type_desc(&n->type, &p->arena)));
+				str_fmt(&p->scratch, "possibly uninitialized %S",
+					type_desc(&n->type, &p->scratch)));
 	}
 }
 
@@ -636,8 +637,8 @@ void node_print(Node *n, Proc *p) {
 		int c = n->val.tuple.len;
 		Value *v = n->val.tuple.data;
 		for (int i = 0; i < c; i++) {
-			if (i > 0) str_cat(&s, S(", "), &p->arena);
-			str_cat(&s, type_desc(&v[i].type, &p->arena), &p->arena);
+			if (i > 0) str_cat(&s, S(", "), &p->scratch);
+			str_cat(&s, type_desc(&v[i].type, &p->scratch), &p->scratch);
 		}
 		printf("\t%d [label=\"start(%.*s)\"]", n->id, (int)s.n, s.s);
 	} else if (n->op == N_LIT) {
@@ -659,10 +660,10 @@ void node_print(Node *n, Proc *p) {
 			break;
 		}
 	} else if (n->op == N_PROJ) {
-		Str d = type_desc(&n->in.data[0]->val.tuple.data[n->val.i].type, &p->arena);
+		Str d = type_desc(&n->in.data[0]->val.tuple.data[n->val.i].type, &p->scratch);
 		printf("\t%d [label=\"%.*s(%ld)\", shape=record]", n->id, (int)d.n, d.s, n->val.i);
 	} else if (n->op == N_UNINIT) {
-		Str s = type_desc(&n->type, &p->arena);
+		Str s = type_desc(&n->type, &p->scratch);
 		printf("\t%d [label=\"uninitialized %.*s\", shape=record]", n->id, (int)s.n, s.s);
 	} else {
 		printf("\t%d [label=\"%s\", shape=record]", n->id, node_type_name(n->op));
@@ -689,7 +690,7 @@ void node_print(Node *n, Proc *p) {
 
 void proc_print(Proc *p) {
 	if (p->start) {
-		Str d = type_desc(&p->ret_type, &p->arena);
+		Str d = type_desc(&p->ret_type, &p->scratch);
 		printf("\t\"%.*s %.*s\" -> %d\n", (int)p->name.n, p->name.s, (int)d.n, d.s, p->start->id);
 		node_print(p->start, p);
 		if (no_opt) {