Index: tests/.expect/functions.arm64.txt
===================================================================
--- tests/.expect/functions.arm64.txt	(revision 6a1f553a360e410cdd669481c70d508194d900e1)
+++ tests/.expect/functions.arm64.txt	(revision 2f8d351e0fb1ea4f22059f53d0f0f6ffe6e06908)
@@ -105,5 +105,5 @@
 struct _tuple2_ {
 };
-static inline void _layoutof__tuple2_(unsigned long int *_sizeof__tuple2_, unsigned long int *_alignof__tuple2_, unsigned long int *_offsetof__tuple2_, unsigned long int _sizeof_Y15tuple_param_2_0, unsigned long int _alignof_Y15tuple_param_2_0, unsigned long int _sizeof_Y15tuple_param_2_1, unsigned long int _alignof_Y15tuple_param_2_1){
+static inline void _layoutof__tuple2_(unsigned long int *_sizeof__tuple2_, unsigned long int *_alignof__tuple2_, unsigned long int *_offsetof__tuple2_, const unsigned long int _sizeof_Y15tuple_param_2_0, const unsigned long int _alignof_Y15tuple_param_2_0, const unsigned long int _sizeof_Y15tuple_param_2_1, const unsigned long int _alignof_Y15tuple_param_2_1){
     ((void)((*_sizeof__tuple2_)=0));
     ((void)((*_alignof__tuple2_)=1));
@@ -136,5 +136,5 @@
 struct _tuple3_ {
 };
-static inline void _layoutof__tuple3_(unsigned long int *_sizeof__tuple3_, unsigned long int *_alignof__tuple3_, unsigned long int *_offsetof__tuple3_, unsigned long int _sizeof_Y15tuple_param_3_0, unsigned long int _alignof_Y15tuple_param_3_0, unsigned long int _sizeof_Y15tuple_param_3_1, unsigned long int _alignof_Y15tuple_param_3_1, unsigned long int _sizeof_Y15tuple_param_3_2, unsigned long int _alignof_Y15tuple_param_3_2){
+static inline void _layoutof__tuple3_(unsigned long int *_sizeof__tuple3_, unsigned long int *_alignof__tuple3_, unsigned long int *_offsetof__tuple3_, const unsigned long int _sizeof_Y15tuple_param_3_0, const unsigned long int _alignof_Y15tuple_param_3_0, const unsigned long int _sizeof_Y15tuple_param_3_1, const unsigned long int _alignof_Y15tuple_param_3_1, const unsigned long int _sizeof_Y15tuple_param_3_2, const unsigned long int _alignof_Y15tuple_param_3_2){
     ((void)((*_sizeof__tuple3_)=0));
     ((void)((*_alignof__tuple3_)=1));
Index: tests/.expect/functions.x64.txt
===================================================================
--- tests/.expect/functions.x64.txt	(revision 6a1f553a360e410cdd669481c70d508194d900e1)
+++ tests/.expect/functions.x64.txt	(revision 2f8d351e0fb1ea4f22059f53d0f0f6ffe6e06908)
@@ -105,5 +105,5 @@
 struct _tuple2_ {
 };
-static inline void _layoutof__tuple2_(unsigned long int *_sizeof__tuple2_, unsigned long int *_alignof__tuple2_, unsigned long int *_offsetof__tuple2_, unsigned long int _sizeof_Y15tuple_param_2_0, unsigned long int _alignof_Y15tuple_param_2_0, unsigned long int _sizeof_Y15tuple_param_2_1, unsigned long int _alignof_Y15tuple_param_2_1){
+static inline void _layoutof__tuple2_(unsigned long int *_sizeof__tuple2_, unsigned long int *_alignof__tuple2_, unsigned long int *_offsetof__tuple2_, const unsigned long int _sizeof_Y15tuple_param_2_0, const unsigned long int _alignof_Y15tuple_param_2_0, const unsigned long int _sizeof_Y15tuple_param_2_1, const unsigned long int _alignof_Y15tuple_param_2_1){
     ((void)((*_sizeof__tuple2_)=0));
     ((void)((*_alignof__tuple2_)=1));
@@ -136,5 +136,5 @@
 struct _tuple3_ {
 };
-static inline void _layoutof__tuple3_(unsigned long int *_sizeof__tuple3_, unsigned long int *_alignof__tuple3_, unsigned long int *_offsetof__tuple3_, unsigned long int _sizeof_Y15tuple_param_3_0, unsigned long int _alignof_Y15tuple_param_3_0, unsigned long int _sizeof_Y15tuple_param_3_1, unsigned long int _alignof_Y15tuple_param_3_1, unsigned long int _sizeof_Y15tuple_param_3_2, unsigned long int _alignof_Y15tuple_param_3_2){
+static inline void _layoutof__tuple3_(unsigned long int *_sizeof__tuple3_, unsigned long int *_alignof__tuple3_, unsigned long int *_offsetof__tuple3_, const unsigned long int _sizeof_Y15tuple_param_3_0, const unsigned long int _alignof_Y15tuple_param_3_0, const unsigned long int _sizeof_Y15tuple_param_3_1, const unsigned long int _alignof_Y15tuple_param_3_1, const unsigned long int _sizeof_Y15tuple_param_3_2, const unsigned long int _alignof_Y15tuple_param_3_2){
     ((void)((*_sizeof__tuple3_)=0));
     ((void)((*_alignof__tuple3_)=1));
Index: tests/.expect/functions.x86.txt
===================================================================
--- tests/.expect/functions.x86.txt	(revision 6a1f553a360e410cdd669481c70d508194d900e1)
+++ tests/.expect/functions.x86.txt	(revision 2f8d351e0fb1ea4f22059f53d0f0f6ffe6e06908)
@@ -105,5 +105,5 @@
 struct _tuple2_ {
 };
-static inline void _layoutof__tuple2_(unsigned long int *_sizeof__tuple2_, unsigned long int *_alignof__tuple2_, unsigned long int *_offsetof__tuple2_, unsigned long int _sizeof_Y15tuple_param_2_0, unsigned long int _alignof_Y15tuple_param_2_0, unsigned long int _sizeof_Y15tuple_param_2_1, unsigned long int _alignof_Y15tuple_param_2_1){
+static inline void _layoutof__tuple2_(unsigned long int *_sizeof__tuple2_, unsigned long int *_alignof__tuple2_, unsigned long int *_offsetof__tuple2_, const unsigned long int _sizeof_Y15tuple_param_2_0, const unsigned long int _alignof_Y15tuple_param_2_0, const unsigned long int _sizeof_Y15tuple_param_2_1, const unsigned long int _alignof_Y15tuple_param_2_1){
     ((void)((*_sizeof__tuple2_)=0));
     ((void)((*_alignof__tuple2_)=1));
@@ -136,5 +136,5 @@
 struct _tuple3_ {
 };
-static inline void _layoutof__tuple3_(unsigned long int *_sizeof__tuple3_, unsigned long int *_alignof__tuple3_, unsigned long int *_offsetof__tuple3_, unsigned long int _sizeof_Y15tuple_param_3_0, unsigned long int _alignof_Y15tuple_param_3_0, unsigned long int _sizeof_Y15tuple_param_3_1, unsigned long int _alignof_Y15tuple_param_3_1, unsigned long int _sizeof_Y15tuple_param_3_2, unsigned long int _alignof_Y15tuple_param_3_2){
+static inline void _layoutof__tuple3_(unsigned long int *_sizeof__tuple3_, unsigned long int *_alignof__tuple3_, unsigned long int *_offsetof__tuple3_, const unsigned long int _sizeof_Y15tuple_param_3_0, const unsigned long int _alignof_Y15tuple_param_3_0, const unsigned long int _sizeof_Y15tuple_param_3_1, const unsigned long int _alignof_Y15tuple_param_3_1, const unsigned long int _sizeof_Y15tuple_param_3_2, const unsigned long int _alignof_Y15tuple_param_3_2){
     ((void)((*_sizeof__tuple3_)=0));
     ((void)((*_alignof__tuple3_)=1));