cmd/internal/gc: change Naddr to take a *Addr to fill in
This allows gins to let Naddr fill in p.From and p.To directly,
avoiding the zeroing and copying of a temporary.
Change-Id: I96d120afe266e68f94d5e82b00886bf6bd458f85
Reviewed-on: https://go-review.googlesource.com/7742
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
diff --git a/src/cmd/7g/ggen.go b/src/cmd/7g/ggen.go
index 367d655..fe04bdf 100644
--- a/src/cmd/7g/ggen.go
+++ b/src/cmd/7g/ggen.go
@@ -77,7 +77,7 @@
p.Reg = arm64.REGRT1
p = appendpp(p, obj.ADUFFZERO, obj.TYPE_NONE, 0, 0, obj.TYPE_MEM, 0, 0)
f := gc.Sysfunc("duffzero")
- p.To = gc.Naddr(f)
+ gc.Naddr(&p.To, f)
gc.Afunclit(&p.To, f)
p.To.Offset = 4 * (128 - cnt/int64(gc.Widthptr))
} else {
