Blk::ins is a vector

Scratching an itch - avoid unnecesary re-allocation in idup()
which is called often in the optimisation chain.

Blk::ins is reallocated in xxx_abi() - needs further fiddling.

1 files changed, 4 insertions, 1 deletions

diff --git a/util.c b/util.c
index 2e4b4cc..a2dfffa 100644
--- a/util.c
+++ b/util.c
@@ -255,7 +255,10 @@ emiti(Ins i)
 void
 idup(Ins **pd, Ins *s, ulong n)
 {
-	*pd = alloc(n * sizeof(Ins));
+	if (*pd)
+		vgrow(pd, n);
+	else
+		*pd = vnew(n, sizeof(Ins), PFn);
 	if (n)
 		memcpy(*pd, s, n * sizeof(Ins));
 }