From ba2826f39e64847f3250cf134b7a51b942eb3673 Mon Sep 17 00:00:00 2001
From: Dmitry Vyukov <dvyukov@google.com>
Date: Sun, 17 May 2020 11:18:15 +0200
Subject: prog: reduce number of allocations in Mutate

Don't allocate 3 parallel slices.
---
 prog/target.go | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'prog/target.go')

diff --git a/prog/target.go b/prog/target.go
index f19ed3fa2..23d1ebd08 100644
--- a/prog/target.go
+++ b/prog/target.go
@@ -275,8 +275,7 @@ func (g *Gen) MutateArg(arg0 Arg) (calls []*Call) {
 			// and updateSizes to caller so that Mutate can act accordingly.
 			return
 		}
-		idx := g.r.Intn(len(ma.args))
-		arg, ctx := ma.args[idx], ma.ctxes[idx]
+		arg, ctx := ma.chooseArg(g.r.Rand)
 		newCalls, ok := g.r.target.mutateArg(g.r, g.s, arg, ctx, &updateSizes)
 		if !ok {
 			continue
-- 
cgit mrf-deployment