gc: align structs according to max alignment of fields
cc: same
runtime: test cc alignment (required moving #define of offsetof to runtime.h)
fix bug260
Fixes #482.
Fixes #609.
R=ken2, r
CC=golang-dev
https://golang.org/cl/3563042
diff --git a/src/cmd/gc/typecheck.c b/src/cmd/gc/typecheck.c
index 5450862..4dd0d70 100644
--- a/src/cmd/gc/typecheck.c
+++ b/src/cmd/gc/typecheck.c
@@ -1124,7 +1124,7 @@
case OPRINT:
case OPRINTN:
ok |= Etop;
- typechecklist(n->list, Erv);
+ typechecklist(n->list, Erv | Eindir); // Eindir: address does not escape
goto ret;
case OPANIC:
