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.

4 files changed, 7 insertions, 4 deletions

diff --git a/amd64/sysv.c b/amd64/sysv.c
index 5b559c1..ba4dc8e 100644
--- a/amd64/sysv.c
+++ b/amd64/sysv.c
@@ -670,7 +670,7 @@ amd64_sysv_abi(Fn *fn)
 			break;
 	fa = selpar(fn, b->ins, i);
 	n = b->nins - (i - b->ins) + (&insb[NIns] - curi);
-	i0 = alloc(n * sizeof(Ins));
+	i0 = vnew(n, sizeof(Ins), PFn);
 	ip = icpy(ip = i0, curi, &insb[NIns] - curi);
 	ip = icpy(ip, i, &b->ins[b->nins] - i);
 	b->nins = n;
diff --git a/arm64/abi.c b/arm64/abi.c
index b9e6a14..fc23637 100644
--- a/arm64/abi.c
+++ b/arm64/abi.c
@@ -744,7 +744,7 @@ arm64_abi(Fn *fn)
 			break;
 	p = selpar(fn, b->ins, i);
 	n = b->nins - (i - b->ins) + (&insb[NIns] - curi);
-	i0 = alloc(n * sizeof(Ins));
+	i0 = vnew(n, sizeof(Ins), PFn);
 	ip = icpy(ip = i0, curi, &insb[NIns] - curi);
 	ip = icpy(ip, i, &b->ins[b->nins] - i);
 	b->nins = n;
diff --git a/rv64/abi.c b/rv64/abi.c
index e31425c..20dc42c 100644
--- a/rv64/abi.c
+++ b/rv64/abi.c
@@ -601,7 +601,7 @@ rv64_abi(Fn *fn)
 			break;
 	p = selpar(fn, b->ins, i);
 	n = b->nins - (i - b->ins) + (&insb[NIns] - curi);
-	i0 = alloc(n * sizeof(Ins));
+	i0 = vnew(n, sizeof(Ins), PFn);
 	ip = icpy(ip = i0, curi, &insb[NIns] - curi);
 	ip = icpy(ip, i, &b->ins[b->nins] - i);
 	b->nins = n;
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));
 }