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[cc2] Add print node functions

These functions are intended only for debugging

--- a/cc2/cc2.h

+++ b/cc2/cc2.h

@@ -228,8 +228,10 @@

 extern void cleannodes(void);

 extern void delnode(Node *np);

 extern void deltree(Node *np);

+extern void prtree(Node *np), prforest(char *msg);

 extern Node *newnode(int op);

 extern Node *addstmt(Node *np, int flags);

+extern Node *delstmt(void);

 extern Node *nextstmt(void);

 /* symbol.c */

--- a/cc2/node.c

+++ b/cc2/node.c

@@ -46,6 +46,41 @@

 	return np;

 }

+#ifndef NDEBUG

+#include <stdio.h>

+

+static void

+prnode(Node *np)

+{

+	if (np->left)

+		prnode(np->left);

+	if (np->right)

+		prnode(np->right);

+	fprintf(stderr, "\t%c%lu", np->op, np->type.size);

+}

+

+void

+prtree(Node *np)

+{

+	prnode(np);

+	putc('\n', stderr);

+}

+

+void

+prforest(char *msg)

+{

+	Node *np;

+

+	if (!curfun)

+		return;

+

+	fprintf(stderr, "%s {\n", msg);

+	for (np = curfun->u.stmt; np; np = np->next)

+		prtree(np);

+	fputs("}\n", stderr);

+}

+#endif

+

 Node *

 addstmt(Node *np, int flag)

 {