prog: remove StructDesc

Remove StructDesc, KeyedStruct, StructKey and all associated
logic/complexity in prog and pkg/compiler.
We can now handle recursion more generically with the Ref type,
and Dir/FieldName are not a part of the type anymore.
This makes StructType/UnionType simpler and more natural.

Reduces size of sys/linux/gen/amd64.go from 5201321 to 4180861 (-20%).

Update #1580

1 files changed, 13 insertions, 15 deletions

diff --git a/prog/rand_test.go b/prog/rand_test.go
index 6f251cb7c..da0871505 100644
--- a/prog/rand_test.go
+++ b/prog/rand_test.go
@@ -101,22 +101,20 @@ func TestEnabledCalls(t *testing.T) {
 func TestSizeGenerateConstArg(t *testing.T) {
 	target, rs, iters := initRandomTargetTest(t, "test", "64")
 	r := newRand(target, rs)
-	for _, c := range target.Syscalls {
-		foreachType(c, func(typ Type, ctx typeCtx) {
-			if _, ok := typ.(*IntType); !ok {
-				return
-			}
-			bits := typ.TypeBitSize()
-			limit := uint64(1<<bits - 1)
-			for i := 0; i < iters; i++ {
-				newArg, _ := typ.generate(r, nil, ctx.Dir)
-				newVal := newArg.(*ConstArg).Val
-				if newVal > limit {
-					t.Fatalf("invalid generated value: %d. (arg bitsize: %d; max value: %d)", newVal, bits, limit)
-				}
+	ForeachType(target.Syscalls, func(typ Type, ctx TypeCtx) {
+		if _, ok := typ.(*IntType); !ok {
+			return
+		}
+		bits := typ.TypeBitSize()
+		limit := uint64(1<<bits - 1)
+		for i := 0; i < iters; i++ {
+			newArg, _ := typ.generate(r, nil, ctx.Dir)
+			newVal := newArg.(*ConstArg).Val
+			if newVal > limit {
+				t.Fatalf("invalid generated value: %d. (arg bitsize: %d; max value: %d)", newVal, bits, limit)
 			}
-		})
-	}
+		}
+	})
 }
 
 func TestFlags(t *testing.T) {