scc

commit 92ec299f9e82a1b01725030914fcb48727a3b296
parent 7d016335501de5c25a3473d342190b7ab2e88283
Author: Quentin Rameau <quinq@fifth.space>
Date:   Tue, 21 Jun 2016 20:46:58 +0200

[cc2] calloc() in nextpc to initialize all fields

Diffstat:
M
cc2/cc2.h
 | 
2
+-
M
cc2/code.c
 | 
6
++----

2 files changed, 3 insertions(+), 5 deletions(-)
diff --git a/cc2/cc2.h b/cc2/cc2.h
@@ -27,7 +27,7 @@ enum sclass {
 	SMEMB     = 'M',
 	SCONST    = '#',
 	STRING    = '"',
-	SNONE     = 0
+	SNONE     = 0 /* cc2 relies on SNONE being 0 in nextpc() */
 };
 
 enum types {
diff --git a/cc2/code.c b/cc2/code.c
@@ -11,19 +11,17 @@ nextpc(void)
 {
         Inst *new;
 
-        new = malloc(sizeof(*new)); /* TODO: create an arena */
+        new = xcalloc(sizeof(*new)); /* TODO: create an arena */
 
         if (!pc) {
-                new->next = NULL;
                 prog = new;
         } else {
                 new->next = pc->next;
                 pc->next = new;
         }
 
+	/* SNONE being 0, calloc initialized {from1,from2,to}.kind for us */
         new->prev = pc;
-	new->flags = 0;
-        new->to.kind = new->from2.kind = new->from1.kind = SNONE;
         pc = new;
 }