runtime: change functype's in and out fields to []*_type

Allows removing a few gratuitous unsafe.Pointer conversions and
parallels the type of reflect.funcType's in and out fields ([]*rtype).

Change-Id: Ie5ca230a94407301a854dfd8782a3180d5054bc4
Reviewed-on: https://go-review.googlesource.com/16163
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

1 files changed, 3 insertions, 4 deletions

diff --git a/src/runtime/mfinal.go b/src/runtime/mfinal.go
index 7e1773c88c..a753ceda52 100644
--- a/src/runtime/mfinal.go
+++ b/src/runtime/mfinal.go
@@ -327,11 +327,10 @@ func SetFinalizer(obj interface{}, finalizer interface{}) {
 		throw("runtime.SetFinalizer: second argument is " + *ftyp._string + ", not a function")
 	}
 	ft := (*functype)(unsafe.Pointer(ftyp))
-	ins := *(*[]*_type)(unsafe.Pointer(&ft.in))
-	if ft.dotdotdot || len(ins) != 1 {
+	if ft.dotdotdot || len(ft.in) != 1 {
 		throw("runtime.SetFinalizer: cannot pass " + *etyp._string + " to finalizer " + *ftyp._string)
 	}
-	fint := ins[0]
+	fint := ft.in[0]
 	switch {
 	case fint == etyp:
 		// ok - same type
@@ -356,7 +355,7 @@ func SetFinalizer(obj interface{}, finalizer interface{}) {
 okarg:
 	// compute size needed for return parameters
 	nret := uintptr(0)
-	for _, t := range *(*[]*_type)(unsafe.Pointer(&ft.out)) {
+	for _, t := range ft.out {
 		nret = round(nret, uintptr(t.align)) + uintptr(t.size)
 	}
 	nret = round(nret, ptrSize)