implement new restrictions on what
can be compared/hashed.

R=r
DELTA=351  (201 added, 80 deleted, 70 changed)
OCL=23423
CL=23481
diff --git a/src/cmd/gc/go.h b/src/cmd/gc/go.h
index b04790d..6dc8393 100644
--- a/src/cmd/gc/go.h
+++ b/src/cmd/gc/go.h
@@ -37,13 +37,12 @@
 	PRIME10		= 10093,
 
 	AUNK		= 100,
+
 	// these values are known by runtime
-	ASIMP		= 0,
+	AMEM		= 0,
+	ANOEQ,
 	ASTRING,
-	APTR,
 	AINTER,
-	ASLICE,
-	ASTRUCT,
 
 	BADWIDTH	= -1000000000
 };