From 212dd57e0a870e8fc5532477583e36e465825c5b Mon Sep 17 00:00:00 2001
From: Michael Forney <mforney@mforney.org>
Date: Wed, 24 Apr 2019 21:13:46 -0700
Subject: Free functions when we're done with them

---
 cc.h   |  1 +
 decl.c |  1 +
 qbe.c  | 18 ++++++++++++++++++
 3 files changed, 20 insertions(+)

diff --git a/cc.h b/cc.h
index 0a6641f..e0f6d84 100644
--- a/cc.h
+++ b/cc.h
@@ -487,6 +487,7 @@ struct value *mkintconst(struct repr *, uint64_t);
 uint64_t intconstvalue(struct value *);
 
 struct func *mkfunc(char *, struct type *, struct scope *);
+void delfunc(struct func *);
 struct type *functype(struct func *);
 void funclabel(struct func *, struct value *);
 struct value *funcexpr(struct func *, struct expr *);
diff --git a/decl.c b/decl.c
index 041d98b..6355689 100644
--- a/decl.c
+++ b/decl.c
@@ -938,6 +938,7 @@ decl(struct scope *s, struct func *f)
 				stmt(f, s);
 				emitfunc(f, d->linkage == LINKEXTERN);
 				s = delscope(s);
+				delfunc(f);
 				d->defined = true;
 				return true;
 			}
diff --git a/qbe.c b/qbe.c
index 6dc7ff1..465634f 100644
--- a/qbe.c
+++ b/qbe.c
@@ -3,6 +3,7 @@
 #include <errno.h>
 #include <stdbool.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <inttypes.h>
 #include "util.h"
@@ -413,6 +414,23 @@ mkfunc(char *name, struct type *t, struct scope *s)
 	return f;
 }
 
+void
+delfunc(struct func *f)
+{
+	struct block *b;
+	struct inst **inst;
+
+	while (b = f->start) {
+		f->start = b->next;
+		arrayforeach (&b->insts, inst)
+			free(*inst);
+		free(b->insts.val);
+		free(b);
+	}
+	delmap(f->gotos, free);
+	free(f);
+}
+
 struct type *
 functype(struct func *f)
 {
-- 
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