Change hash_idx_t to int32_t on all platforms

* src/lisp.h (hash_idx_t): Change to int32_t.
* src/fns.c (hash_index_size): Adapt to new index type.

2 files changed, 3 insertions, 2 deletions

diff --git a/src/fns.c b/src/fns.c
index 4a38126d9dc..3acbc7f86a1 100644
--- a/src/fns.c
+++ b/src/fns.c
@@ -4515,7 +4515,8 @@ hash_index_size (ptrdiff_t size)
   /* An upper bound on the size of a hash table index.  It must fit in
      ptrdiff_t and be a valid Emacs fixnum.  */
   ptrdiff_t upper_bound = min (MOST_POSITIVE_FIXNUM,
-                         PTRDIFF_MAX / sizeof (ptrdiff_t));
+                               min (TYPE_MAXIMUM (hash_idx_t),
+                                    PTRDIFF_MAX / sizeof (ptrdiff_t)));
   ptrdiff_t index_size = size + (size >> 2);  /* 1.25x larger */
   if (index_size < upper_bound)
     index_size = next_almost_prime (index_size);
diff --git a/src/lisp.h b/src/lisp.h
index 5b70e96d6a1..f27f506b58f 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -2432,7 +2432,7 @@ verify (FIXNUM_OVERFLOW_P (hash_unused));
 
 /* The type of a hash table index, both for table indices and index
    (hash) indices.  It's signed and a subtype of ptrdiff_t.  */
-typedef ptrdiff_t hash_idx_t;
+typedef int32_t hash_idx_t;
 
 struct Lisp_Hash_Table
 {