qbe

commit 99c8f84efc280265d026737b2bdfd4741c8a74e8
parent 4e81cc2f8a28ba168b446dbbd24a3877e6837da9
Author: Quentin Carbonneaux <quentin@c9x.me>
Date:   Tue,  2 Mar 2021 10:01:26 +0100

fix a couple asan complaints

Diffstat:
M
spill.c
 | 
12
+++++++-----
M
util.c
 | 
6
++++--

2 files changed, 11 insertions(+), 7 deletions(-)
diff --git a/spill.c b/spill.c
@@ -173,11 +173,13 @@ limit(BSet *b, int k, BSet *f)
 		bsclr(b, t);
 		tarr[i++] = t;
 	}
-	if (!f)
-		qsort(tarr, nt, sizeof tarr[0], tcmp0);
-	else {
-		fst = f;
-		qsort(tarr, nt, sizeof tarr[0], tcmp1);
+	if (nt > 1) {
+		if (!f)
+			qsort(tarr, nt, sizeof tarr[0], tcmp0);
+		else {
+			fst = f;
+			qsort(tarr, nt, sizeof tarr[0], tcmp1);
+		}
 	}
 	for (i=0; i<k && i<nt; i++)
 		bsset(b, tarr[i]);
diff --git a/util.c b/util.c
@@ -246,13 +246,15 @@ void
 idup(Ins **pd, Ins *s, ulong n)
 {
 	*pd = alloc(n * sizeof(Ins));
-	memcpy(*pd, s, n * sizeof(Ins));
+	if (n)
+		memcpy(*pd, s, n * sizeof(Ins));
 }
 
 Ins *
 icpy(Ins *d, Ins *s, ulong n)
 {
-	memcpy(d, s, n * sizeof(Ins));
+	if (n)
+		memcpy(d, s, n * sizeof(Ins));
 	return d + n;
 }