switch t1.kind {
			case TINT8, TUINT8, TINT16, TUINT16, TINT32, TUINT32, TINT64, TUINT64, TINT, TUINT, TUINTPTR, TCOMPLEX64, TCOMPLEX128, TFLOAT32, TFLOAT64, TBOOL, TSTRING, TPTR, TUNSAFEPTR:
				return true
			}
			// fall through to unnamed type comparison for complex types.
			goto cont
		}
		// Special case: we keep byte/uint8 and rune/int32

	}
	if !t.HasPointers() {
		// Note: this case ensures that pointers to not-in-heap types
		// are not considered pointers by garbage collection and stack copying.
		return
	}

	switch t.Kind() {
	case types.TPTR, types.TUNSAFEPTR, types.TFUNC, types.TCHAN, types.TMAP:
		if off&int64(types.PtrSize-1) != 0 {
			base.Fatalf("typebits.Set: invalid alignment, %v", t)
		}
		bv.Set(int32(off / int64(types.PtrSize))) // pointer

	ir.OKForConst[types.TSTRING] = true

	okforlen[types.TARRAY] = true
	okforlen[types.TCHAN] = true
	okforlen[types.TMAP] = true
	okforlen[types.TSLICE] = true
	okforlen[types.TSTRING] = true

	okforeq[types.TPTR] = true
	okforeq[types.TUNSAFEPTR] = true
	okforeq[types.TINTER] = true
	okforeq[types.TCHAN] = true
	okforeq[types.TSTRING] = true
	okforeq[types.TBOOL] = true