diff mbox series

v2: Use gcc __builtin_stdc_* builtins in stdbit.h if possible

Message ID Za4zBGmXL+GIHjxp@tucnak
State New
Headers show
Series v2: Use gcc __builtin_stdc_* builtins in stdbit.h if possible | expand

Commit Message

Jakub Jelinek Jan. 22, 2024, 9:19 a.m. UTC 
On Sat, Jan 20, 2024 at 11:27:17PM +0000, Joseph Myers wrote:
> On Sat, 20 Jan 2024, Jakub Jelinek wrote:
> 
> > +# define stdc_leading_zeros_uc(x) \
> > +  (__builtin_stdc_leading_zeros ((unsigned char) (x)))
> > +# define stdc_leading_zeros_us(x) \
> > +  (__builtin_stdc_leading_zeros ((unsigned short) (x)))
> > +# define stdc_leading_zeros_ui(x) \
> > +  (__builtin_stdc_leading_zeros ((unsigned int) (x)))
> > +# define stdc_leading_zeros_ul(x) \
> > +  (__builtin_stdc_leading_zeros ((unsigned long int) (x)))
> > +# define stdc_leading_zeros_ull(x) \
> > +  (__builtin_stdc_leading_zeros ((unsigned long long int) (x)))
> 
> I don't like defining any of the type-specific functions as macros using 
> casts (as opposed to implicit conversions); implicit conversions ensure 
> they have appropriate diagnostics for bad argument types that might be 
> lost with a cast (in particular, if someone passes a pointer to one of the 
> functions taking a pointer-sized integer, getting an error from the 
> implicit conversion is desirable, rather that a cast from pointer to 
> integer without a diagnostic).

When the type-specific macros need to use inline functions, it means
they won't be usable in constant expressions (sure, the standard doesn't
require that).

Anyway, so do you want instead to just use the new GCC builtins only for the
type-generic macros (as done in the following patch, tested like the earlier
one on x86_64), or should the type-specific macros use different
type-specific inlines then which would use the new builtins?  I guess if
one can't use them in constant expressions, then the current implementations
of those type-specific macros is just fine.



	Jakub

Comments

Joseph Myers Jan. 22, 2024, 5:58 p.m. UTC | #1 
On Mon, 22 Jan 2024, Jakub Jelinek wrote:

> When the type-specific macros need to use inline functions, it means
> they won't be usable in constant expressions (sure, the standard doesn't
> require that).

Indeed - usability in constant expressions might wait for a future version 
of C to have some form of constexpr functions, rather than being expected 
now.

> Anyway, so do you want instead to just use the new GCC builtins only for the
> type-generic macros (as done in the following patch, tested like the earlier
> one on x86_64), or should the type-specific macros use different
> type-specific inlines then which would use the new builtins?  I guess if
> one can't use them in constant expressions, then the current implementations
> of those type-specific macros is just fine.

I think just use the new builtins for the type-generic macros.  I don't 
think there's any need to have different implementations of the inline 
functions.  (If any of them don't get compiled to essentially the same 
code as versions that do use the new builtins, that's best addressed as an 
optimization improvement in GCC.)

> diff --git a/manual/stdbit.texi b/manual/stdbit.texi
> index fe41c671d8..0878015cc7 100644
> --- a/manual/stdbit.texi
> +++ b/manual/stdbit.texi
> @@ -32,7 +32,9 @@ and @code{unsigned long long int}.  In addition, there is a
>  corresponding type-generic macro (not listed below), named the same as
>  the functions but without any suffix such as @samp{_uc}.  The
>  type-generic macro can only be used with an argument of an unsigned
> -integer type with a width of 8, 16, 32 or 64 bits.
> +integer type with a width of 8, 16, 32 or 64 bits, or when using
> +a compiler with support for stdc builtins such as GCC 14.1 or later
> +any unsigned integer type those builtins support.

I don't think a reference to "stdc builtins" is very useful for glibc 
users (but mentioning unsigned __int128 and unsigned _BitInt types as 
examples supported with GCC 14 would be).
diff mbox series

Patch

diff --git a/manual/stdbit.texi b/manual/stdbit.texi
index fe41c671d8..0878015cc7 100644
--- a/manual/stdbit.texi
+++ b/manual/stdbit.texi
@@ -32,7 +32,9 @@  and @code{unsigned long long int}.  In addition, there is a
 corresponding type-generic macro (not listed below), named the same as
 the functions but without any suffix such as @samp{_uc}.  The
 type-generic macro can only be used with an argument of an unsigned
-integer type with a width of 8, 16, 32 or 64 bits.
+integer type with a width of 8, 16, 32 or 64 bits, or when using
+a compiler with support for stdc builtins such as GCC 14.1 or later
+any unsigned integer type those builtins support.
 
 @deftypefun {unsigned int} stdc_leading_zeros_uc (unsigned char @var{x})
 @deftypefunx {unsigned int} stdc_leading_zeros_us (unsigned short @var{x})
diff --git a/stdlib/Makefile b/stdlib/Makefile
index d587f054d1..9898cc5d8a 100644
--- a/stdlib/Makefile
+++ b/stdlib/Makefile
@@ -308,6 +308,7 @@  tests := \
   tst-setcontext10 \
   tst-setcontext11 \
   tst-stdbit-Wconversion \
+  tst-stdbit-builtins \
   tst-stdc_bit_ceil \
   tst-stdc_bit_floor \
   tst-stdc_bit_width \
diff --git a/stdlib/stdbit.h b/stdlib/stdbit.h
index f334eb174d..2801590c63 100644
--- a/stdlib/stdbit.h
+++ b/stdlib/stdbit.h
@@ -64,9 +64,13 @@  extern unsigned int stdc_leading_zeros_ul (unsigned long int __x)
 __extension__
 extern unsigned int stdc_leading_zeros_ull (unsigned long long int __x)
      __THROW __attribute_const__;
-#define stdc_leading_zeros(x)				\
+#if __glibc_has_builtin (__builtin_stdc_leading_zeros)
+# define stdc_leading_zeros(x) (__builtin_stdc_leading_zeros (x))
+#else
+# define stdc_leading_zeros(x)				\
   (stdc_leading_zeros_ull (x)				\
    - (unsigned int) (8 * (sizeof (0ULL) - sizeof (x))))
+#endif
 
 #if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_clzll)
 static __always_inline unsigned int
@@ -116,9 +120,13 @@  extern unsigned int stdc_leading_ones_ul (unsigned long int __x)
 __extension__
 extern unsigned int stdc_leading_ones_ull (unsigned long long int __x)
      __THROW __attribute_const__;
-#define stdc_leading_ones(x)					\
+#if __glibc_has_builtin (__builtin_stdc_leading_ones)
+# define stdc_leading_ones(x) (__builtin_stdc_leading_ones (x))
+#else
+# define stdc_leading_ones(x)					\
   (stdc_leading_ones_ull ((unsigned long long int) (x)		\
 			  << 8 * (sizeof (0ULL) - sizeof (x))))
+#endif
 
 #if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_clzll)
 static __always_inline unsigned int
@@ -168,11 +176,15 @@  extern unsigned int stdc_trailing_zeros_ul (unsigned long int __x)
 __extension__
 extern unsigned int stdc_trailing_zeros_ull (unsigned long long int __x)
      __THROW __attribute_const__;
-#define stdc_trailing_zeros(x)				\
+#if __glibc_has_builtin (__builtin_stdc_trailing_zeros)
+# define stdc_trailing_zeros(x) (__builtin_stdc_trailing_zeros (x))
+#else
+# define stdc_trailing_zeros(x)				\
   (sizeof (x) == 8 ? stdc_trailing_zeros_ull (x)	\
    : sizeof (x) == 4 ? stdc_trailing_zeros_ui (x)	\
    : sizeof (x) == 2 ? stdc_trailing_zeros_us (__pacify_uint16 (x))	\
    : stdc_trailing_zeros_uc (__pacify_uint8 (x)))
+#endif
 
 #if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_ctzll)
 static __always_inline unsigned int
@@ -222,7 +234,11 @@  extern unsigned int stdc_trailing_ones_ul (unsigned long int __x)
 __extension__
 extern unsigned int stdc_trailing_ones_ull (unsigned long long int __x)
      __THROW __attribute_const__;
-#define stdc_trailing_ones(x) (stdc_trailing_ones_ull (x))
+#if __glibc_has_builtin (__builtin_stdc_trailing_ones)
+# define stdc_trailing_ones(x) (__builtin_stdc_trailing_ones (x))
+#else
+# define stdc_trailing_ones(x) (stdc_trailing_ones_ull (x))
+#endif
 
 #if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_ctzll)
 static __always_inline unsigned int
@@ -272,11 +288,15 @@  extern unsigned int stdc_first_leading_zero_ul (unsigned long int __x)
 __extension__
 extern unsigned int stdc_first_leading_zero_ull (unsigned long long int __x)
      __THROW __attribute_const__;
-#define stdc_first_leading_zero(x)			\
+#if __glibc_has_builtin (__builtin_stdc_first_leading_zero)
+# define stdc_first_leading_zero(x) (__builtin_stdc_first_leading_zero (x))
+#else
+# define stdc_first_leading_zero(x)			\
   (sizeof (x) == 8 ? stdc_first_leading_zero_ull (x)	\
    : sizeof (x) == 4 ? stdc_first_leading_zero_ui (x)	\
    : sizeof (x) == 2 ? stdc_first_leading_zero_us (__pacify_uint16 (x))	\
    : stdc_first_leading_zero_uc (__pacify_uint8 (x)))
+#endif
 
 #if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_clzll)
 static __always_inline unsigned int
@@ -326,11 +346,15 @@  extern unsigned int stdc_first_leading_one_ul (unsigned long int __x)
 __extension__
 extern unsigned int stdc_first_leading_one_ull (unsigned long long int __x)
      __THROW __attribute_const__;
-#define stdc_first_leading_one(x)			\
+#if __glibc_has_builtin (__builtin_stdc_first_leading_one)
+# define stdc_first_leading_one(x) (__builtin_stdc_first_leading_one (x))
+#else
+# define stdc_first_leading_one(x)			\
   (sizeof (x) == 8 ? stdc_first_leading_one_ull (x)	\
    : sizeof (x) == 4 ? stdc_first_leading_one_ui (x)	\
    : sizeof (x) == 2 ? stdc_first_leading_one_us (__pacify_uint16 (x))	\
    : stdc_first_leading_one_uc (__pacify_uint8 (x)))
+#endif
 
 #if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_clzll)
 static __always_inline unsigned int
@@ -380,11 +404,15 @@  extern unsigned int stdc_first_trailing_zero_ul (unsigned long int __x)
 __extension__
 extern unsigned int stdc_first_trailing_zero_ull (unsigned long long int __x)
      __THROW __attribute_const__;
-#define stdc_first_trailing_zero(x)			\
+#if __glibc_has_builtin (__builtin_stdc_first_trailing_zero)
+# define stdc_first_trailing_zero(x) (__builtin_stdc_first_trailing_zero (x))
+#else
+# define stdc_first_trailing_zero(x)			\
   (sizeof (x) == 8 ? stdc_first_trailing_zero_ull (x)	\
    : sizeof (x) == 4 ? stdc_first_trailing_zero_ui (x)	\
    : sizeof (x) == 2 ? stdc_first_trailing_zero_us (__pacify_uint16 (x)) \
    : stdc_first_trailing_zero_uc (__pacify_uint8 (x)))
+#endif
 
 #if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_ctzll)
 static __always_inline unsigned int
@@ -434,11 +462,15 @@  extern unsigned int stdc_first_trailing_one_ul (unsigned long int __x)
 __extension__
 extern unsigned int stdc_first_trailing_one_ull (unsigned long long int __x)
      __THROW __attribute_const__;
-#define stdc_first_trailing_one(x)			\
+#if __glibc_has_builtin (__builtin_stdc_first_trailing_one)
+# define stdc_first_trailing_one(x) (__builtin_stdc_first_trailing_one (x))
+#else
+# define stdc_first_trailing_one(x)			\
   (sizeof (x) == 8 ? stdc_first_trailing_one_ull (x)	\
    : sizeof (x) == 4 ? stdc_first_trailing_one_ui (x)	\
    : sizeof (x) == 2 ? stdc_first_trailing_one_us (__pacify_uint16 (x))	\
    : stdc_first_trailing_one_uc (__pacify_uint8 (x)))
+#endif
 
 #if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_ctzll)
 static __always_inline unsigned int
@@ -488,9 +520,13 @@  extern unsigned int stdc_count_zeros_ul (unsigned long int __x)
 __extension__
 extern unsigned int stdc_count_zeros_ull (unsigned long long int __x)
      __THROW __attribute_const__;
-#define stdc_count_zeros(x)				\
+#if __glibc_has_builtin (__builtin_stdc_count_zeros)
+# define stdc_count_zeros(x) (__builtin_stdc_count_zeros (x))
+#else
+# define stdc_count_zeros(x)				\
   (stdc_count_zeros_ull (x)				\
    - (unsigned int) (8 * (sizeof (0ULL) - sizeof (x))))
+#endif
 
 #if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_popcountll)
 static __always_inline unsigned int
@@ -540,7 +576,11 @@  extern unsigned int stdc_count_ones_ul (unsigned long int __x)
 __extension__
 extern unsigned int stdc_count_ones_ull (unsigned long long int __x)
      __THROW __attribute_const__;
-#define stdc_count_ones(x) (stdc_count_ones_ull (x))
+#if __glibc_has_builtin (__builtin_stdc_count_ones)
+# define stdc_count_ones(x) (__builtin_stdc_count_ones (x))
+#else
+# define stdc_count_ones(x) (stdc_count_ones_ull (x))
+#endif
 
 #if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_popcountll)
 static __always_inline unsigned int
@@ -590,10 +630,14 @@  extern bool stdc_has_single_bit_ul (unsigned long int __x)
 __extension__
 extern bool stdc_has_single_bit_ull (unsigned long long int __x)
      __THROW __attribute_const__;
-#define stdc_has_single_bit(x)				\
+#if __glibc_has_builtin (__builtin_stdc_has_single_bit)
+# define stdc_has_single_bit(x) (__builtin_stdc_has_single_bit (x))
+#else
+# define stdc_has_single_bit(x)				\
   ((bool) (sizeof (x) <= sizeof (unsigned int)		\
 	   ? stdc_has_single_bit_ui (x)			\
 	   : stdc_has_single_bit_ull (x)))
+#endif
 
 static __always_inline bool
 __hsb64_inline (uint64_t __x)
@@ -641,7 +685,11 @@  extern unsigned int stdc_bit_width_ul (unsigned long int __x)
 __extension__
 extern unsigned int stdc_bit_width_ull (unsigned long long int __x)
      __THROW __attribute_const__;
-#define stdc_bit_width(x) (stdc_bit_width_ull (x))
+#if __glibc_has_builtin (__builtin_stdc_bit_width)
+# define stdc_bit_width(x) (__builtin_stdc_bit_width (x))
+#else
+# define stdc_bit_width(x) (stdc_bit_width_ull (x))
+#endif
 
 #if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_clzll)
 static __always_inline unsigned int
@@ -691,7 +739,11 @@  extern unsigned long int stdc_bit_floor_ul (unsigned long int __x)
 __extension__
 extern unsigned long long int stdc_bit_floor_ull (unsigned long long int __x)
      __THROW __attribute_const__;
-#define stdc_bit_floor(x) ((__typeof (x)) stdc_bit_floor_ull (x))
+#if __glibc_has_builtin (__builtin_stdc_bit_floor)
+# define stdc_bit_floor(x) (__builtin_stdc_bit_floor (x))
+#else
+# define stdc_bit_floor(x) ((__typeof (x)) stdc_bit_floor_ull (x))
+#endif
 
 #if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_clzll)
 static __always_inline uint64_t
@@ -743,7 +795,11 @@  extern unsigned long int stdc_bit_ceil_ul (unsigned long int __x)
 __extension__
 extern unsigned long long int stdc_bit_ceil_ull (unsigned long long int __x)
      __THROW __attribute_const__;
-#define stdc_bit_ceil(x) ((__typeof (x)) stdc_bit_ceil_ull (x))
+#if __glibc_has_builtin (__builtin_stdc_bit_ceil)
+# define stdc_bit_ceil(x) (__builtin_stdc_bit_ceil (x))
+#else
+# define stdc_bit_ceil(x) ((__typeof (x)) stdc_bit_ceil_ull (x))
+#endif
 
 #if __GNUC_PREREQ (3, 4) || __glibc_has_builtin (__builtin_clzll)
 static __always_inline uint64_t
diff --git a/stdlib/tst-stdbit-builtins.c b/stdlib/tst-stdbit-builtins.c
new file mode 100644
index 0000000000..9540e963ee
--- /dev/null
+++ b/stdlib/tst-stdbit-builtins.c
@@ -0,0 +1,918 @@ 
+/* Test <stdbit.h> type-generic macros with compiler __builtin_stdc_* support.
+   Copyright (C) 2024 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <stdbit.h>
+#include <limits.h>
+#include <support/check.h>
+
+#if __glibc_has_builtin (__builtin_stdc_leading_zeros) \
+    && __glibc_has_builtin (__builtin_stdc_leading_ones) \
+    && __glibc_has_builtin (__builtin_stdc_trailing_zeros) \
+    && __glibc_has_builtin (__builtin_stdc_trailing_ones) \
+    && __glibc_has_builtin (__builtin_stdc_first_leading_zero) \
+    && __glibc_has_builtin (__builtin_stdc_first_leading_one) \
+    && __glibc_has_builtin (__builtin_stdc_first_trailing_zero) \
+    && __glibc_has_builtin (__builtin_stdc_first_trailing_one) \
+    && __glibc_has_builtin (__builtin_stdc_count_zeros) \
+    && __glibc_has_builtin (__builtin_stdc_count_ones) \
+    && __glibc_has_builtin (__builtin_stdc_has_single_bit) \
+    && __glibc_has_builtin (__builtin_stdc_bit_width) \
+    && __glibc_has_builtin (__builtin_stdc_bit_floor) \
+    && __glibc_has_builtin (__builtin_stdc_bit_ceil)
+
+# if !defined (BITINT_MAXWIDTH) && defined (__BITINT_MAXWIDTH__)
+#  define BITINT_MAXWIDTH __BITINT_MAXWIDTH__
+# endif
+
+typedef unsigned char uc;
+typedef unsigned short us;
+typedef unsigned int ui;
+typedef unsigned long int ul;
+typedef unsigned long long int ull;
+
+ui
+leading_zeros (uc a, us b, ui c, ul d, ull e)
+{
+  return (stdc_leading_zeros (a)
+	  + stdc_leading_zeros (b)
+	  + stdc_leading_zeros (c)
+	  + stdc_leading_zeros (d)
+	  + stdc_leading_zeros (e));
+}
+
+ui
+leading_ones (uc a, us b, ui c, ul d, ull e)
+{
+  return (stdc_leading_ones (a)
+	  + stdc_leading_ones (b)
+	  + stdc_leading_ones (c)
+	  + stdc_leading_ones (d)
+	  + stdc_leading_ones (e));
+}
+
+ui
+trailing_zeros (uc a, us b, ui c, ul d, ull e)
+{
+  return (stdc_trailing_zeros (a)
+	  + stdc_trailing_zeros (b)
+	  + stdc_trailing_zeros (c)
+	  + stdc_trailing_zeros (d)
+	  + stdc_trailing_zeros (e));
+}
+
+ui
+trailing_ones (uc a, us b, ui c, ul d, ull e)
+{
+  return (stdc_trailing_ones (a)
+	  + stdc_trailing_ones (b)
+	  + stdc_trailing_ones (c)
+	  + stdc_trailing_ones (d)
+	  + stdc_trailing_ones (e));
+}
+
+ui
+first_leading_zero (uc a, us b, ui c, ul d, ull e)
+{
+  return (stdc_first_leading_zero (a)
+	  + stdc_first_leading_zero (b)
+	  + stdc_first_leading_zero (c)
+	  + stdc_first_leading_zero (d)
+	  + stdc_first_leading_zero (e));
+}
+
+ui
+first_leading_one (uc a, us b, ui c, ul d, ull e)
+{
+  return (stdc_first_leading_one (a)
+	  + stdc_first_leading_one (b)
+	  + stdc_first_leading_one (c)
+	  + stdc_first_leading_one (d)
+	  + stdc_first_leading_one (e));
+}
+
+ui
+first_trailing_zero (uc a, us b, ui c, ul d, ull e)
+{
+  return (stdc_first_trailing_zero (a)
+	  + stdc_first_trailing_zero (b)
+	  + stdc_first_trailing_zero (c)
+	  + stdc_first_trailing_zero (d)
+	  + stdc_first_trailing_zero (e));
+}
+
+ui
+first_trailing_one (uc a, us b, ui c, ul d, ull e)
+{
+  return (stdc_first_trailing_one (a)
+	  + stdc_first_trailing_one (b)
+	  + stdc_first_trailing_one (c)
+	  + stdc_first_trailing_one (d)
+	  + stdc_first_trailing_one (e));
+}
+
+ui
+count_zeros (uc a, us b, ui c, ul d, ull e)
+{
+  return (stdc_count_zeros (a)
+	  + stdc_count_zeros (b)
+	  + stdc_count_zeros (c)
+	  + stdc_count_zeros (d)
+	  + stdc_count_zeros (e));
+}
+
+ui
+count_ones (uc a, us b, ui c, ul d, ull e)
+{
+  return (stdc_count_ones (a)
+	  + stdc_count_ones (b)
+	  + stdc_count_ones (c)
+	  + stdc_count_ones (d)
+	  + stdc_count_ones (e));
+}
+
+ui
+has_single_bit (uc a, us b, ui c, ul d, ull e)
+{
+  return (stdc_has_single_bit (a)
+	  || stdc_has_single_bit (b)
+	  || stdc_has_single_bit (c)
+	  || stdc_has_single_bit (d)
+	  || stdc_has_single_bit (e));
+}
+
+ui
+bit_width (uc a, us b, ui c, ul d, ull e)
+{
+  return (stdc_bit_width (a)
+	  + stdc_bit_width (b)
+	  + stdc_bit_width (c)
+	  + stdc_bit_width (d)
+	  + stdc_bit_width (e));
+}
+
+ull
+bit_floor (uc a, us b, ui c, ul d, ull e)
+{
+  return (stdc_bit_floor (a)
+	  + stdc_bit_floor (b)
+	  + stdc_bit_floor (c)
+	  + stdc_bit_floor (d)
+	  + stdc_bit_floor (e));
+}
+
+ull
+bit_ceil (uc a, us b, ui c, ul d, ull e)
+{
+  return (stdc_bit_ceil (a)
+	  + stdc_bit_ceil (b)
+	  + stdc_bit_ceil (c)
+	  + stdc_bit_ceil (d)
+	  + stdc_bit_ceil (e));
+}
+
+# define expr_has_type(e, t) _Generic (e, default : 0, t : 1)
+
+static int
+do_test (void)
+{
+  TEST_COMPARE (stdc_leading_zeros ((uc) 0), CHAR_BIT);
+  TEST_COMPARE (expr_has_type (stdc_leading_zeros ((uc) 0), ui), 1);
+  TEST_COMPARE (stdc_leading_zeros ((us) 0), sizeof (short) * CHAR_BIT);
+  TEST_COMPARE (expr_has_type (stdc_leading_zeros ((us) 0), ui), 1);
+  TEST_COMPARE (stdc_leading_zeros (0U), sizeof (int) * CHAR_BIT);
+  TEST_COMPARE (expr_has_type (stdc_leading_zeros (0U), ui), 1);
+  TEST_COMPARE (stdc_leading_zeros (0UL), sizeof (long int) * CHAR_BIT);
+  TEST_COMPARE (expr_has_type (stdc_leading_zeros (0UL), ui), 1);
+  TEST_COMPARE (stdc_leading_zeros (0ULL), sizeof (long long int) * CHAR_BIT);
+  TEST_COMPARE (expr_has_type (stdc_leading_zeros (0ULL), ui), 1);
+  TEST_COMPARE (stdc_leading_zeros ((uc) ~0U), 0);
+  TEST_COMPARE (stdc_leading_zeros ((us) ~0U), 0);
+  TEST_COMPARE (stdc_leading_zeros (~0U), 0);
+  TEST_COMPARE (stdc_leading_zeros (~0UL), 0);
+  TEST_COMPARE (stdc_leading_zeros (~0ULL), 0);
+  TEST_COMPARE (stdc_leading_zeros ((uc) 3), CHAR_BIT - 2);
+  TEST_COMPARE (stdc_leading_zeros ((us) 9), sizeof (short) * CHAR_BIT - 4);
+  TEST_COMPARE (stdc_leading_zeros (34U), sizeof (int) * CHAR_BIT - 6);
+  TEST_COMPARE (stdc_leading_zeros (130UL), sizeof (long int) * CHAR_BIT - 8);
+  TEST_COMPARE (stdc_leading_zeros (512ULL),
+		sizeof (long long int) * CHAR_BIT - 10);
+  TEST_COMPARE (stdc_leading_ones ((uc) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_leading_ones ((uc) 0), ui), 1);
+  TEST_COMPARE (stdc_leading_ones ((us) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_leading_ones ((us) 0), ui), 1);
+  TEST_COMPARE (stdc_leading_ones (0U), 0);
+  TEST_COMPARE (expr_has_type (stdc_leading_ones (0U), ui), 1);
+  TEST_COMPARE (stdc_leading_ones (0UL), 0);
+  TEST_COMPARE (expr_has_type (stdc_leading_ones (0UL), ui), 1);
+  TEST_COMPARE (stdc_leading_ones (0ULL), 0);
+  TEST_COMPARE (expr_has_type (stdc_leading_ones (0ULL), ui), 1);
+  TEST_COMPARE (stdc_leading_ones ((uc) ~0U), CHAR_BIT);
+  TEST_COMPARE (stdc_leading_ones ((us) ~0U), sizeof (short) * CHAR_BIT);
+  TEST_COMPARE (stdc_leading_ones (~0U), sizeof (int) * CHAR_BIT);
+  TEST_COMPARE (stdc_leading_ones (~0UL), sizeof (long int) * CHAR_BIT);
+  TEST_COMPARE (stdc_leading_ones (~0ULL), sizeof (long long int) * CHAR_BIT);
+  TEST_COMPARE (stdc_leading_ones ((uc) ~3), CHAR_BIT - 2);
+  TEST_COMPARE (stdc_leading_ones ((us) ~9), sizeof (short) * CHAR_BIT - 4);
+  TEST_COMPARE (stdc_leading_ones (~34U), sizeof (int) * CHAR_BIT - 6);
+  TEST_COMPARE (stdc_leading_ones (~130UL), sizeof (long int) * CHAR_BIT - 8);
+  TEST_COMPARE (stdc_leading_ones (~512ULL),
+		sizeof (long long int) * CHAR_BIT - 10);
+  TEST_COMPARE (stdc_trailing_zeros ((uc) 0), CHAR_BIT);
+  TEST_COMPARE (expr_has_type (stdc_trailing_zeros ((uc) 0), ui), 1);
+  TEST_COMPARE (stdc_trailing_zeros ((us) 0), sizeof (short) * CHAR_BIT);
+  TEST_COMPARE (expr_has_type (stdc_trailing_zeros ((us) 0), ui), 1);
+  TEST_COMPARE (stdc_trailing_zeros (0U), sizeof (int) * CHAR_BIT);
+  TEST_COMPARE (expr_has_type (stdc_trailing_zeros (0U), ui), 1);
+  TEST_COMPARE (stdc_trailing_zeros (0UL), sizeof (long int) * CHAR_BIT);
+  TEST_COMPARE (expr_has_type (stdc_trailing_zeros (0UL), ui), 1);
+  TEST_COMPARE (stdc_trailing_zeros (0ULL), sizeof (long long int) * CHAR_BIT);
+  TEST_COMPARE (expr_has_type (stdc_trailing_zeros (0ULL), ui), 1);
+  TEST_COMPARE (stdc_trailing_zeros ((uc) ~0U), 0);
+  TEST_COMPARE (stdc_trailing_zeros ((us) ~0U), 0);
+  TEST_COMPARE (stdc_trailing_zeros (~0U), 0);
+  TEST_COMPARE (stdc_trailing_zeros (~0UL), 0);
+  TEST_COMPARE (stdc_trailing_zeros (~0ULL), 0);
+  TEST_COMPARE (stdc_trailing_zeros ((uc) 2), 1);
+  TEST_COMPARE (stdc_trailing_zeros ((us) 24), 3);
+  TEST_COMPARE (stdc_trailing_zeros (32U), 5);
+  TEST_COMPARE (stdc_trailing_zeros (128UL), 7);
+  TEST_COMPARE (stdc_trailing_zeros (512ULL), 9);
+  TEST_COMPARE (stdc_trailing_ones ((uc) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_trailing_ones ((uc) 0), ui), 1);
+  TEST_COMPARE (stdc_trailing_ones ((us) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_trailing_ones ((us) 0), ui), 1);
+  TEST_COMPARE (stdc_trailing_ones (0U), 0);
+  TEST_COMPARE (expr_has_type (stdc_trailing_ones (0U), ui), 1);
+  TEST_COMPARE (stdc_trailing_ones (0UL), 0);
+  TEST_COMPARE (expr_has_type (stdc_trailing_ones (0UL), ui), 1);
+  TEST_COMPARE (stdc_trailing_ones (0ULL), 0);
+  TEST_COMPARE (expr_has_type (stdc_trailing_ones (0ULL), ui), 1);
+  TEST_COMPARE (stdc_trailing_ones ((uc) ~0U), CHAR_BIT);
+  TEST_COMPARE (stdc_trailing_ones ((us) ~0U), sizeof (short) * CHAR_BIT);
+  TEST_COMPARE (stdc_trailing_ones (~0U), sizeof (int) * CHAR_BIT);
+  TEST_COMPARE (stdc_trailing_ones (~0UL), sizeof (long int) * CHAR_BIT);
+  TEST_COMPARE (stdc_trailing_ones (~0ULL), sizeof (long long int) * CHAR_BIT);
+  TEST_COMPARE (stdc_trailing_ones ((uc) 5), 1);
+  TEST_COMPARE (stdc_trailing_ones ((us) 15), 4);
+  TEST_COMPARE (stdc_trailing_ones (127U), 7);
+  TEST_COMPARE (stdc_trailing_ones (511UL), 9);
+  TEST_COMPARE (stdc_trailing_ones (~0ULL >> 2),
+		sizeof (long long int) * CHAR_BIT - 2);
+  TEST_COMPARE (stdc_first_leading_zero ((uc) 0), 1);
+  TEST_COMPARE (expr_has_type (stdc_first_leading_zero ((uc) 0), ui), 1);
+  TEST_COMPARE (stdc_first_leading_zero ((us) 0), 1);
+  TEST_COMPARE (expr_has_type (stdc_first_leading_zero ((us) 0), ui), 1);
+  TEST_COMPARE (stdc_first_leading_zero (0U), 1);
+  TEST_COMPARE (expr_has_type (stdc_first_leading_zero (0U), ui), 1);
+  TEST_COMPARE (stdc_first_leading_zero (0UL), 1);
+  TEST_COMPARE (expr_has_type (stdc_first_leading_zero (0UL), ui), 1);
+  TEST_COMPARE (stdc_first_leading_zero (0ULL), 1);
+  TEST_COMPARE (expr_has_type (stdc_first_leading_zero (0ULL), ui), 1);
+  TEST_COMPARE (stdc_first_leading_zero ((uc) ~0U), 0);
+  TEST_COMPARE (stdc_first_leading_zero ((us) ~0U), 0);
+  TEST_COMPARE (stdc_first_leading_zero (~0U), 0);
+  TEST_COMPARE (stdc_first_leading_zero (~0UL), 0);
+  TEST_COMPARE (stdc_first_leading_zero (~0ULL), 0);
+  TEST_COMPARE (stdc_first_leading_zero ((uc) ~3U), CHAR_BIT - 1);
+  TEST_COMPARE (stdc_first_leading_zero ((us) ~15U),
+		sizeof (short) * CHAR_BIT - 3);
+  TEST_COMPARE (stdc_first_leading_zero (~63U), sizeof (int) * CHAR_BIT - 5);
+  TEST_COMPARE (stdc_first_leading_zero (~255UL),
+		sizeof (long int) * CHAR_BIT - 7);
+  TEST_COMPARE (stdc_first_leading_zero (~1023ULL),
+		sizeof (long long int) * CHAR_BIT - 9);
+  TEST_COMPARE (stdc_first_leading_one ((uc) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_first_leading_one ((uc) 0), ui), 1);
+  TEST_COMPARE (stdc_first_leading_one ((us) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_first_leading_one ((us) 0), ui), 1);
+  TEST_COMPARE (stdc_first_leading_one (0U), 0);
+  TEST_COMPARE (expr_has_type (stdc_first_leading_one (0U), ui), 1);
+  TEST_COMPARE (stdc_first_leading_one (0UL), 0);
+  TEST_COMPARE (expr_has_type (stdc_first_leading_one (0UL), ui), 1);
+  TEST_COMPARE (stdc_first_leading_one (0ULL), 0);
+  TEST_COMPARE (expr_has_type (stdc_first_leading_one (0ULL), ui), 1);
+  TEST_COMPARE (stdc_first_leading_one ((uc) ~0U), 1);
+  TEST_COMPARE (stdc_first_leading_one ((us) ~0U), 1);
+  TEST_COMPARE (stdc_first_leading_one (~0U), 1);
+  TEST_COMPARE (stdc_first_leading_one (~0UL), 1);
+  TEST_COMPARE (stdc_first_leading_one (~0ULL), 1);
+  TEST_COMPARE (stdc_first_leading_one ((uc) 3), CHAR_BIT - 1);
+  TEST_COMPARE (stdc_first_leading_one ((us) 9),
+		sizeof (short) * CHAR_BIT - 3);
+  TEST_COMPARE (stdc_first_leading_one (34U), sizeof (int) * CHAR_BIT - 5);
+  TEST_COMPARE (stdc_first_leading_one (130UL),
+		sizeof (long int) * CHAR_BIT - 7);
+  TEST_COMPARE (stdc_first_leading_one (512ULL),
+		sizeof (long long int) * CHAR_BIT - 9);
+  TEST_COMPARE (stdc_first_trailing_zero ((uc) 0), 1);
+  TEST_COMPARE (expr_has_type (stdc_first_trailing_zero ((uc) 0), ui), 1);
+  TEST_COMPARE (stdc_first_trailing_zero ((us) 0), 1);
+  TEST_COMPARE (expr_has_type (stdc_first_trailing_zero ((us) 0), ui), 1);
+  TEST_COMPARE (stdc_first_trailing_zero (0U), 1);
+  TEST_COMPARE (expr_has_type (stdc_first_trailing_zero (0U), ui), 1);
+  TEST_COMPARE (stdc_first_trailing_zero (0UL), 1);
+  TEST_COMPARE (expr_has_type (stdc_first_trailing_zero (0UL), ui), 1);
+  TEST_COMPARE (stdc_first_trailing_zero (0ULL), 1);
+  TEST_COMPARE (expr_has_type (stdc_first_trailing_zero (0ULL), ui), 1);
+  TEST_COMPARE (stdc_first_trailing_zero ((uc) ~0U), 0);
+  TEST_COMPARE (stdc_first_trailing_zero ((us) ~0U), 0);
+  TEST_COMPARE (stdc_first_trailing_zero (~0U), 0);
+  TEST_COMPARE (stdc_first_trailing_zero (~0UL), 0);
+  TEST_COMPARE (stdc_first_trailing_zero (~0ULL), 0);
+  TEST_COMPARE (stdc_first_trailing_zero ((uc) 2), 1);
+  TEST_COMPARE (stdc_first_trailing_zero ((us) 15), 5);
+  TEST_COMPARE (stdc_first_trailing_zero (63U), 7);
+  TEST_COMPARE (stdc_first_trailing_zero (128UL), 1);
+  TEST_COMPARE (stdc_first_trailing_zero (511ULL), 10);
+  TEST_COMPARE (stdc_first_trailing_one ((uc) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_first_trailing_one ((uc) 0), ui), 1);
+  TEST_COMPARE (stdc_first_trailing_one ((us) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_first_trailing_one ((us) 0), ui), 1);
+  TEST_COMPARE (stdc_first_trailing_one (0U), 0);
+  TEST_COMPARE (expr_has_type (stdc_first_trailing_one (0U), ui), 1);
+  TEST_COMPARE (stdc_first_trailing_one (0UL), 0);
+  TEST_COMPARE (expr_has_type (stdc_first_trailing_one (0UL), ui), 1);
+  TEST_COMPARE (stdc_first_trailing_one (0ULL), 0);
+  TEST_COMPARE (expr_has_type (stdc_first_trailing_one (0ULL), ui), 1);
+  TEST_COMPARE (stdc_first_trailing_one ((uc) ~0U), 1);
+  TEST_COMPARE (stdc_first_trailing_one ((us) ~0U), 1);
+  TEST_COMPARE (stdc_first_trailing_one (~0U), 1);
+  TEST_COMPARE (stdc_first_trailing_one (~0UL), 1);
+  TEST_COMPARE (stdc_first_trailing_one (~0ULL), 1);
+  TEST_COMPARE (stdc_first_trailing_one ((uc) 4), 3);
+  TEST_COMPARE (stdc_first_trailing_one ((us) 96), 6);
+  TEST_COMPARE (stdc_first_trailing_one (127U), 1);
+  TEST_COMPARE (stdc_first_trailing_one (511UL), 1);
+  TEST_COMPARE (stdc_first_trailing_one (~0ULL << 12), 13);
+  TEST_COMPARE (stdc_count_zeros ((uc) 0), CHAR_BIT);
+  TEST_COMPARE (expr_has_type (stdc_count_zeros ((uc) 0), ui), 1);
+  TEST_COMPARE (stdc_count_zeros ((us) 0), sizeof (short) * CHAR_BIT);
+  TEST_COMPARE (expr_has_type (stdc_count_zeros ((us) 0), ui), 1);
+  TEST_COMPARE (stdc_count_zeros (0U), sizeof (int) * CHAR_BIT);
+  TEST_COMPARE (expr_has_type (stdc_count_zeros (0U), ui), 1);
+  TEST_COMPARE (stdc_count_zeros (0UL), sizeof (long int) * CHAR_BIT);
+  TEST_COMPARE (expr_has_type (stdc_count_zeros (0UL), ui), 1);
+  TEST_COMPARE (stdc_count_zeros (0ULL), sizeof (long long int) * CHAR_BIT);
+  TEST_COMPARE (expr_has_type (stdc_count_zeros (0ULL), ui), 1);
+  TEST_COMPARE (stdc_count_zeros ((uc) ~0U), 0);
+  TEST_COMPARE (stdc_count_zeros ((us) ~0U), 0);
+  TEST_COMPARE (stdc_count_zeros (~0U), 0);
+  TEST_COMPARE (stdc_count_zeros (~0UL), 0);
+  TEST_COMPARE (stdc_count_zeros (~0ULL), 0);
+  TEST_COMPARE (stdc_count_zeros ((uc) 1U), CHAR_BIT - 1);
+  TEST_COMPARE (stdc_count_zeros ((us) 42), sizeof (short) * CHAR_BIT - 3);
+  TEST_COMPARE (stdc_count_zeros (291U), sizeof (int) * CHAR_BIT - 4);
+  TEST_COMPARE (stdc_count_zeros (~1315UL), 5);
+  TEST_COMPARE (stdc_count_zeros (3363ULL),
+		sizeof (long long int) * CHAR_BIT - 6);
+  TEST_COMPARE (stdc_count_ones ((uc) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_count_ones ((uc) 0), ui), 1);
+  TEST_COMPARE (stdc_count_ones ((us) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_count_ones ((us) 0), ui), 1);
+  TEST_COMPARE (stdc_count_ones (0U), 0);
+  TEST_COMPARE (expr_has_type (stdc_count_ones (0U), ui), 1);
+  TEST_COMPARE (stdc_count_ones (0UL), 0);
+  TEST_COMPARE (expr_has_type (stdc_count_ones (0UL), ui), 1);
+  TEST_COMPARE (stdc_count_ones (0ULL), 0);
+  TEST_COMPARE (expr_has_type (stdc_count_ones (0ULL), ui), 1);
+  TEST_COMPARE (stdc_count_ones ((uc) ~0U), CHAR_BIT);
+  TEST_COMPARE (stdc_count_ones ((us) ~0U), sizeof (short) * CHAR_BIT);
+  TEST_COMPARE (stdc_count_ones (~0U), sizeof (int) * CHAR_BIT);
+  TEST_COMPARE (stdc_count_ones (~0UL), sizeof (long int) * CHAR_BIT);
+  TEST_COMPARE (stdc_count_ones (~0ULL), sizeof (long long int) * CHAR_BIT);
+  TEST_COMPARE (stdc_count_ones ((uc) ~1U), CHAR_BIT - 1);
+  TEST_COMPARE (stdc_count_ones ((us) ~42), sizeof (short) * CHAR_BIT - 3);
+  TEST_COMPARE (stdc_count_ones (~291U), sizeof (int) * CHAR_BIT - 4);
+  TEST_COMPARE (stdc_count_ones (1315UL), 5);
+  TEST_COMPARE (stdc_count_ones (~3363ULL),
+		sizeof (long long int) * CHAR_BIT - 6);
+  TEST_COMPARE (stdc_has_single_bit ((uc) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_has_single_bit ((uc) 0), _Bool), 1);
+  TEST_COMPARE (stdc_has_single_bit ((us) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_has_single_bit ((us) 0), _Bool), 1);
+  TEST_COMPARE (stdc_has_single_bit (0U), 0);
+  TEST_COMPARE (expr_has_type (stdc_has_single_bit (0U), _Bool), 1);
+  TEST_COMPARE (stdc_has_single_bit (0UL), 0);
+  TEST_COMPARE (expr_has_type (stdc_has_single_bit (0UL), _Bool), 1);
+  TEST_COMPARE (stdc_has_single_bit (0ULL), 0);
+  TEST_COMPARE (expr_has_type (stdc_has_single_bit (0ULL), _Bool), 1);
+  TEST_COMPARE (stdc_has_single_bit ((uc) 2), 1);
+  TEST_COMPARE (stdc_has_single_bit ((us) 8), 1);
+  TEST_COMPARE (stdc_has_single_bit (32U), 1);
+  TEST_COMPARE (stdc_has_single_bit (128UL), 1);
+  TEST_COMPARE (stdc_has_single_bit (512ULL), 1);
+  TEST_COMPARE (stdc_has_single_bit ((uc) 7), 0);
+  TEST_COMPARE (stdc_has_single_bit ((us) 96), 0);
+  TEST_COMPARE (stdc_has_single_bit (513U), 0);
+  TEST_COMPARE (stdc_has_single_bit (1022UL), 0);
+  TEST_COMPARE (stdc_has_single_bit (12ULL), 0);
+  TEST_COMPARE (stdc_bit_width ((uc) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_bit_width ((uc) 0), ui), 1);
+  TEST_COMPARE (stdc_bit_width ((us) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_bit_width ((us) 0), ui), 1);
+  TEST_COMPARE (stdc_bit_width (0U), 0);
+  TEST_COMPARE (expr_has_type (stdc_bit_width (0U), ui), 1);
+  TEST_COMPARE (stdc_bit_width (0UL), 0);
+  TEST_COMPARE (expr_has_type (stdc_bit_width (0UL), ui), 1);
+  TEST_COMPARE (stdc_bit_width (0ULL), 0);
+  TEST_COMPARE (expr_has_type (stdc_bit_width (0ULL), ui), 1);
+  TEST_COMPARE (stdc_bit_width ((uc) ~0U), CHAR_BIT);
+  TEST_COMPARE (stdc_bit_width ((us) ~0U), sizeof (short) * CHAR_BIT);
+  TEST_COMPARE (stdc_bit_width (~0U), sizeof (int) * CHAR_BIT);
+  TEST_COMPARE (stdc_bit_width (~0UL), sizeof (long int) * CHAR_BIT);
+  TEST_COMPARE (stdc_bit_width (~0ULL), sizeof (long long int) * CHAR_BIT);
+  TEST_COMPARE (stdc_bit_width ((uc) ((uc) ~0U >> 1)), CHAR_BIT - 1);
+  TEST_COMPARE (stdc_bit_width ((uc) 6), 3);
+  TEST_COMPARE (stdc_bit_width ((us) 12U), 4);
+  TEST_COMPARE (stdc_bit_width ((us) ((us) ~0U >> 5)),
+		sizeof (short) * CHAR_BIT - 5);
+  TEST_COMPARE (stdc_bit_width (137U), 8);
+  TEST_COMPARE (stdc_bit_width (269U), 9);
+  TEST_COMPARE (stdc_bit_width (39UL), 6);
+  TEST_COMPARE (stdc_bit_width (~0UL >> 2), sizeof (long int) * CHAR_BIT - 2);
+  TEST_COMPARE (stdc_bit_width (1023ULL), 10);
+  TEST_COMPARE (stdc_bit_width (1024ULL), 11);
+  TEST_COMPARE (stdc_bit_floor ((uc) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_bit_floor ((uc) 0), uc), 1);
+  TEST_COMPARE (stdc_bit_floor ((us) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_bit_floor ((us) 0), us), 1);
+  TEST_COMPARE (stdc_bit_floor (0U), 0U);
+  TEST_COMPARE (expr_has_type (stdc_bit_floor (0U), ui), 1);
+  TEST_COMPARE (stdc_bit_floor (0UL), 0UL);
+  TEST_COMPARE (expr_has_type (stdc_bit_floor (0UL), ul), 1);
+  TEST_COMPARE (stdc_bit_floor (0ULL), 0ULL);
+  TEST_COMPARE (expr_has_type (stdc_bit_floor (0ULL), ull), 1);
+  TEST_COMPARE (stdc_bit_floor ((uc) ~0U), (1U << (CHAR_BIT - 1)));
+  TEST_COMPARE (stdc_bit_floor ((us) ~0U),
+		(1U << (sizeof (short) * CHAR_BIT - 1)));
+  TEST_COMPARE (stdc_bit_floor (~0U), (1U << (sizeof (int) * CHAR_BIT - 1)));
+  TEST_COMPARE (stdc_bit_floor (~0UL),
+		(1UL << (sizeof (long int) * CHAR_BIT - 1)));
+  TEST_COMPARE (stdc_bit_floor (~0ULL),
+		(1ULL << (sizeof (long long int) * CHAR_BIT - 1)));
+  TEST_COMPARE (stdc_bit_floor ((uc) 4), 4);
+  TEST_COMPARE (stdc_bit_floor ((uc) 7), 4);
+  TEST_COMPARE (stdc_bit_floor ((us) 8U), 8);
+  TEST_COMPARE (stdc_bit_floor ((us) 31U), 16);
+  TEST_COMPARE (stdc_bit_floor (137U), 128U);
+  TEST_COMPARE (stdc_bit_floor (269U), 256U);
+  TEST_COMPARE (stdc_bit_floor (511UL), 256UL);
+  TEST_COMPARE (stdc_bit_floor (512UL), 512UL);
+  TEST_COMPARE (stdc_bit_floor (513UL), 512ULL);
+  TEST_COMPARE (stdc_bit_floor (1024ULL), 1024ULL);
+  TEST_COMPARE (stdc_bit_ceil ((uc) 0), 1);
+  TEST_COMPARE (expr_has_type (stdc_bit_ceil ((uc) 0), uc), 1);
+  TEST_COMPARE (stdc_bit_ceil ((us) 0), 1);
+  TEST_COMPARE (expr_has_type (stdc_bit_ceil ((us) 0), us), 1);
+  TEST_COMPARE (stdc_bit_ceil (0U), 1U);
+  TEST_COMPARE (expr_has_type (stdc_bit_ceil (0U), ui), 1);
+  TEST_COMPARE (stdc_bit_ceil (0UL), 1UL);
+  TEST_COMPARE (expr_has_type (stdc_bit_ceil (0UL), ul), 1);
+  TEST_COMPARE (stdc_bit_ceil (0ULL), 1ULL);
+  TEST_COMPARE (expr_has_type (stdc_bit_ceil (0ULL), ull), 1);
+  TEST_COMPARE (stdc_bit_ceil ((uc) ~0U), 0);
+  TEST_COMPARE (stdc_bit_ceil ((us) ~0U), 0);
+  TEST_COMPARE (stdc_bit_ceil (~0U), 0U);
+  TEST_COMPARE (stdc_bit_ceil (~0UL), 0UL);
+  TEST_COMPARE (stdc_bit_ceil (~0ULL), 0ULL);
+  TEST_COMPARE (stdc_bit_ceil ((uc) ((uc) ~0U >> 1)), (1U << (CHAR_BIT - 1)));
+  TEST_COMPARE (stdc_bit_ceil ((uc) ((uc) ~0U >> 1)), (1U << (CHAR_BIT - 1)));
+  TEST_COMPARE (stdc_bit_ceil ((us) ((us) ~0U >> 1)),
+		(1U << (sizeof (short) * CHAR_BIT - 1)));
+  TEST_COMPARE (stdc_bit_ceil ((us) ((us) ~0U >> 1)),
+		(1U << (sizeof (short) * CHAR_BIT - 1)));
+  TEST_COMPARE (stdc_bit_ceil (~0U >> 1),
+		(1U << (sizeof (int) * CHAR_BIT - 1)));
+  TEST_COMPARE (stdc_bit_ceil (1U << (sizeof (int) * CHAR_BIT - 1)),
+		(1U << (sizeof (int) * CHAR_BIT - 1)));
+  TEST_COMPARE (stdc_bit_ceil (~0UL >> 1),
+		(1UL << (sizeof (long int) * CHAR_BIT - 1)));
+  TEST_COMPARE (stdc_bit_ceil (~0UL >> 1),
+		(1UL << (sizeof (long int) * CHAR_BIT - 1)));
+  TEST_COMPARE (stdc_bit_ceil (1ULL
+			       << (sizeof (long long int) * CHAR_BIT - 1)),
+		(1ULL << (sizeof (long long int) * CHAR_BIT - 1)));
+  TEST_COMPARE (stdc_bit_ceil (~0ULL >> 1),
+		(1ULL << (sizeof (long long int) * CHAR_BIT - 1)));
+  TEST_COMPARE (stdc_bit_ceil ((uc) 1), 1);
+  TEST_COMPARE (stdc_bit_ceil ((uc) 2), 2);
+  TEST_COMPARE (stdc_bit_ceil ((us) 3U), 4);
+  TEST_COMPARE (stdc_bit_ceil ((us) 4U), 4);
+  TEST_COMPARE (stdc_bit_ceil (5U), 8U);
+  TEST_COMPARE (stdc_bit_ceil (269U), 512U);
+  TEST_COMPARE (stdc_bit_ceil (511UL), 512UL);
+  TEST_COMPARE (stdc_bit_ceil (512UL), 512UL);
+  TEST_COMPARE (stdc_bit_ceil (513ULL), 1024ULL);
+  TEST_COMPARE (stdc_bit_ceil (1025ULL), 2048ULL);
+# ifdef __SIZEOF_INT128__
+  TEST_COMPARE (stdc_leading_zeros ((unsigned __int128) 0),
+		sizeof (__int128) * CHAR_BIT);
+  TEST_COMPARE (expr_has_type (stdc_leading_zeros ((unsigned __int128) 0), ui),
+		1);
+  TEST_COMPARE (stdc_leading_zeros (~(unsigned __int128) 0), 0);
+  TEST_COMPARE (stdc_leading_ones ((unsigned __int128) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_leading_ones ((unsigned __int128) 0), ui),
+		1);
+  TEST_COMPARE (stdc_leading_ones (~(unsigned __int128) 0),
+		sizeof (__int128) * CHAR_BIT);
+  TEST_COMPARE (stdc_trailing_zeros ((unsigned __int128) 0),
+		sizeof (__int128) * CHAR_BIT);
+  TEST_COMPARE (expr_has_type (stdc_trailing_zeros ((unsigned __int128) 0),
+			       ui), 1);
+  TEST_COMPARE (stdc_trailing_zeros (~(unsigned __int128) 0), 0);
+  TEST_COMPARE (stdc_trailing_ones ((unsigned __int128) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_trailing_ones ((unsigned __int128) 0), ui),
+		1);
+  TEST_COMPARE (stdc_trailing_ones (~(unsigned __int128) 0),
+		sizeof (__int128) * CHAR_BIT);
+  TEST_COMPARE (stdc_first_leading_zero ((unsigned __int128) 0), 1);
+  TEST_COMPARE (expr_has_type (stdc_first_leading_zero ((unsigned __int128) 0),
+			       ui), 1);
+  TEST_COMPARE (stdc_first_leading_zero (~(unsigned __int128) 0), 0);
+  TEST_COMPARE (stdc_first_leading_one ((unsigned __int128) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_first_leading_one ((unsigned __int128) 0),
+			       ui), 1);
+  TEST_COMPARE (stdc_first_leading_one (~(unsigned __int128) 0), 1);
+  TEST_COMPARE (stdc_first_trailing_zero ((unsigned __int128) 0), 1);
+  TEST_COMPARE (expr_has_type (stdc_first_trailing_zero ((unsigned __int128)
+							 0), ui), 1);
+  TEST_COMPARE (stdc_first_trailing_zero (~(unsigned __int128) 0), 0);
+  TEST_COMPARE (stdc_first_trailing_one ((unsigned __int128) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_first_trailing_one ((unsigned __int128) 0),
+			       ui), 1);
+  TEST_COMPARE (stdc_first_trailing_one (~(unsigned __int128) 0), 1);
+  TEST_COMPARE (stdc_count_zeros ((unsigned __int128) 0),
+		sizeof (__int128) * CHAR_BIT);
+  TEST_COMPARE (expr_has_type (stdc_count_zeros ((unsigned __int128) 0), ui),
+		1);
+  TEST_COMPARE (stdc_count_zeros (~(unsigned __int128) 0), 0);
+  TEST_COMPARE (stdc_count_ones ((unsigned __int128) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_count_ones ((unsigned __int128) 0), ui),
+		1);
+  TEST_COMPARE (stdc_count_ones (~(unsigned __int128) 0),
+		sizeof (__int128) * CHAR_BIT);
+  TEST_COMPARE (stdc_has_single_bit ((unsigned __int128) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_has_single_bit ((unsigned __int128) 0),
+		_Bool), 1);
+  TEST_COMPARE (stdc_has_single_bit (~(unsigned __int128) 0), 0);
+  TEST_COMPARE (stdc_bit_width ((unsigned __int128) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_bit_width ((unsigned __int128) 0), ui), 1);
+  TEST_COMPARE (stdc_bit_width (~(unsigned __int128) 0),
+		sizeof (__int128) * CHAR_BIT);
+  TEST_COMPARE (stdc_bit_floor ((unsigned __int128) 0) != 0, 0);
+  TEST_COMPARE (expr_has_type (stdc_bit_floor ((unsigned __int128) 0),
+			       unsigned __int128), 1);
+  TEST_COMPARE (stdc_bit_floor (~(unsigned __int128) 0)
+		!= ((unsigned __int128) 1) << (sizeof (__int128)
+					       * CHAR_BIT - 1), 0);
+  TEST_COMPARE (stdc_bit_ceil ((unsigned __int128) 0) != 1, 0);
+  TEST_COMPARE (expr_has_type (stdc_bit_ceil ((unsigned __int128) 0),
+			       unsigned __int128), 1);
+  TEST_COMPARE (stdc_bit_ceil ((unsigned __int128) 1) != 1, 0);
+  TEST_COMPARE (stdc_bit_ceil ((~(unsigned __int128) 0) >> 1)
+		!= ((unsigned __int128) 1) << (sizeof (__int128)
+					       * CHAR_BIT - 1), 0);
+  TEST_COMPARE (stdc_bit_ceil (~(unsigned __int128) 0) != 0, 0);
+# endif
+  uc a = 0;
+  TEST_COMPARE (stdc_bit_width (a++), 0);
+  TEST_COMPARE (a, 1);
+  ull b = 0;
+  TEST_COMPARE (stdc_bit_width (b++), 0);
+  TEST_COMPARE (b, 1);
+  TEST_COMPARE (stdc_bit_floor (a++), 1);
+  TEST_COMPARE (a, 2);
+  TEST_COMPARE (stdc_bit_floor (b++), 1);
+  TEST_COMPARE (b, 2);
+  TEST_COMPARE (stdc_bit_ceil (a++), 2);
+  TEST_COMPARE (a, 3);
+  TEST_COMPARE (stdc_bit_ceil (b++), 2);
+  TEST_COMPARE (b, 3);
+  TEST_COMPARE (stdc_leading_zeros (a++), CHAR_BIT - 2);
+  TEST_COMPARE (a, 4);
+  TEST_COMPARE (stdc_leading_zeros (b++),
+		sizeof (long long int) * CHAR_BIT - 2);
+  TEST_COMPARE (b, 4);
+  TEST_COMPARE (stdc_leading_ones (a++), 0);
+  TEST_COMPARE (a, 5);
+  TEST_COMPARE (stdc_leading_ones (b++), 0);
+  TEST_COMPARE (b, 5);
+  TEST_COMPARE (stdc_trailing_zeros (a++), 0);
+  TEST_COMPARE (a, 6);
+  TEST_COMPARE (stdc_trailing_zeros (b++), 0);
+  TEST_COMPARE (b, 6);
+  TEST_COMPARE (stdc_trailing_ones (a++), 0);
+  TEST_COMPARE (a, 7);
+  TEST_COMPARE (stdc_trailing_ones (b++), 0);
+  TEST_COMPARE (b, 7);
+  TEST_COMPARE (stdc_first_leading_zero (a++), 1);
+  TEST_COMPARE (a, 8);
+  TEST_COMPARE (stdc_first_leading_zero (b++), 1);
+  TEST_COMPARE (b, 8);
+  TEST_COMPARE (stdc_first_leading_one (a++), CHAR_BIT - 3);
+  TEST_COMPARE (a, 9);
+  TEST_COMPARE (stdc_first_leading_one (b++),
+		sizeof (long long int) * CHAR_BIT - 3);
+  TEST_COMPARE (b, 9);
+  TEST_COMPARE (stdc_first_trailing_zero (a++), 2);
+  TEST_COMPARE (a, 10);
+  TEST_COMPARE (stdc_first_trailing_zero (b++), 2);
+  TEST_COMPARE (b, 10);
+  TEST_COMPARE (stdc_first_trailing_one (a++), 2);
+  TEST_COMPARE (a, 11);
+  TEST_COMPARE (stdc_first_trailing_one (b++), 2);
+  TEST_COMPARE (b, 11);
+  TEST_COMPARE (stdc_count_zeros (a++), CHAR_BIT - 3);
+  TEST_COMPARE (a, 12);
+  TEST_COMPARE (stdc_count_zeros (b++),
+		sizeof (long long int) * CHAR_BIT - 3);
+  TEST_COMPARE (b, 12);
+  TEST_COMPARE (stdc_count_ones (a++), 2);
+  TEST_COMPARE (a, 13);
+  TEST_COMPARE (stdc_count_ones (b++), 2);
+  TEST_COMPARE (b, 13);
+  TEST_COMPARE (stdc_has_single_bit (a++), 0);
+  TEST_COMPARE (a, 14);
+  TEST_COMPARE (stdc_has_single_bit (b++), 0);
+  TEST_COMPARE (b, 14);
+# ifdef BITINT_MAXWIDTH
+#  if BITINT_MAXWIDTH >= 64
+  TEST_COMPARE (stdc_leading_zeros (0uwb), 1);
+  TEST_COMPARE (expr_has_type (stdc_leading_zeros (0uwb), ui), 1);
+  TEST_COMPARE (stdc_leading_zeros (1uwb), 0);
+  TEST_COMPARE (expr_has_type (stdc_leading_zeros (1uwb), ui), 1);
+  TEST_COMPARE (stdc_leading_ones (0uwb), 0);
+  TEST_COMPARE (expr_has_type (stdc_leading_ones (0uwb), ui), 1);
+  TEST_COMPARE (stdc_leading_ones (1uwb), 1);
+  TEST_COMPARE (expr_has_type (stdc_leading_ones (1uwb), ui), 1);
+  TEST_COMPARE (stdc_trailing_zeros (0uwb), 1);
+  TEST_COMPARE (expr_has_type (stdc_trailing_zeros (0uwb), ui), 1);
+  TEST_COMPARE (stdc_trailing_zeros (1uwb), 0);
+  TEST_COMPARE (expr_has_type (stdc_trailing_zeros (1uwb), ui), 1);
+  TEST_COMPARE (stdc_trailing_ones (0uwb), 0);
+  TEST_COMPARE (expr_has_type (stdc_trailing_ones (0uwb), ui), 1);
+  TEST_COMPARE (stdc_trailing_ones (1uwb), 1);
+  TEST_COMPARE (expr_has_type (stdc_trailing_ones (1uwb), ui), 1);
+  TEST_COMPARE (stdc_first_leading_zero (0uwb), 1);
+  TEST_COMPARE (expr_has_type (stdc_first_leading_zero (0uwb), ui), 1);
+  TEST_COMPARE (stdc_first_leading_zero (1uwb), 0);
+  TEST_COMPARE (expr_has_type (stdc_first_leading_zero (1uwb), ui), 1);
+  TEST_COMPARE (stdc_first_leading_one (0uwb), 0);
+  TEST_COMPARE (expr_has_type (stdc_first_leading_one (0uwb), ui), 1);
+  TEST_COMPARE (stdc_first_leading_one (1uwb), 1);
+  TEST_COMPARE (expr_has_type (stdc_first_leading_one (1uwb), ui), 1);
+  TEST_COMPARE (stdc_first_trailing_zero (0uwb), 1);
+  TEST_COMPARE (expr_has_type (stdc_first_trailing_zero (0uwb), ui), 1);
+  TEST_COMPARE (stdc_first_trailing_zero (1uwb), 0);
+  TEST_COMPARE (expr_has_type (stdc_first_trailing_zero (1uwb), ui), 1);
+  TEST_COMPARE (stdc_first_trailing_one (0uwb), 0);
+  TEST_COMPARE (expr_has_type (stdc_first_trailing_one (0uwb), ui), 1);
+  TEST_COMPARE (stdc_first_trailing_one (1uwb), 1);
+  TEST_COMPARE (expr_has_type (stdc_first_trailing_one (1uwb), ui), 1);
+  TEST_COMPARE (stdc_count_zeros (0uwb), 1);
+  TEST_COMPARE (expr_has_type (stdc_count_zeros (0uwb), ui), 1);
+  TEST_COMPARE (stdc_count_zeros (1uwb), 0);
+  TEST_COMPARE (expr_has_type (stdc_count_zeros (1uwb), ui), 1);
+  TEST_COMPARE (stdc_count_ones (0uwb), 0);
+  TEST_COMPARE (expr_has_type (stdc_count_ones (0uwb), ui), 1);
+  TEST_COMPARE (stdc_count_ones (1uwb), 1);
+  TEST_COMPARE (expr_has_type (stdc_count_ones (1uwb), ui), 1);
+  TEST_COMPARE (stdc_has_single_bit (0uwb), 0);
+  TEST_COMPARE (expr_has_type (stdc_has_single_bit (0uwb), _Bool), 1);
+  TEST_COMPARE (stdc_has_single_bit (1uwb), 1);
+  TEST_COMPARE (expr_has_type (stdc_has_single_bit (1uwb), _Bool), 1);
+  TEST_COMPARE (stdc_bit_width (0uwb), 0);
+  TEST_COMPARE (expr_has_type (stdc_bit_width (0uwb), ui), 1);
+  TEST_COMPARE (stdc_bit_width (1uwb), 1);
+  TEST_COMPARE (expr_has_type (stdc_bit_width (1uwb), ui), 1);
+  TEST_COMPARE (stdc_bit_floor (0uwb), 0);
+  TEST_COMPARE (expr_has_type (stdc_bit_floor (0uwb), unsigned _BitInt(1)), 1);
+  TEST_COMPARE (stdc_bit_floor (1uwb), 1);
+  TEST_COMPARE (expr_has_type (stdc_bit_floor (1uwb), unsigned _BitInt(1)), 1);
+  TEST_COMPARE (stdc_bit_ceil (0uwb), 1);
+  TEST_COMPARE (expr_has_type (stdc_bit_ceil (0uwb), unsigned _BitInt(1)), 1);
+  TEST_COMPARE (stdc_bit_ceil (1uwb), 1);
+  TEST_COMPARE (expr_has_type (stdc_bit_ceil (1uwb), unsigned _BitInt(1)), 1);
+  unsigned _BitInt(1) c = 0;
+  TEST_COMPARE (stdc_bit_floor (c++), 0);
+  TEST_COMPARE (c, 1);
+  TEST_COMPARE (stdc_bit_floor (c++), 1);
+  TEST_COMPARE (c, 0);
+  TEST_COMPARE (stdc_bit_ceil (c++), 1);
+  TEST_COMPARE (c, 1);
+  TEST_COMPARE (stdc_bit_ceil (c++), 1);
+  TEST_COMPARE (c, 0);
+#  endif
+#  if BITINT_MAXWIDTH >= 512
+  TEST_COMPARE (stdc_leading_zeros ((unsigned _BitInt(512)) 0), 512);
+  TEST_COMPARE (expr_has_type (stdc_leading_zeros ((unsigned _BitInt(512)) 0),
+			       ui), 1);
+  TEST_COMPARE (stdc_leading_zeros ((unsigned _BitInt(373)) 0), 373);
+  TEST_COMPARE (expr_has_type (stdc_leading_zeros ((unsigned _BitInt(373)) 0),
+			       ui), 1);
+  TEST_COMPARE (stdc_leading_zeros (~(unsigned _BitInt(512)) 0), 0);
+  TEST_COMPARE (stdc_leading_zeros (~(unsigned _BitInt(373)) 0), 0);
+  TEST_COMPARE (stdc_leading_zeros ((unsigned _BitInt(512)) 275), 512 - 9);
+  TEST_COMPARE (stdc_leading_zeros ((unsigned _BitInt(373)) 512), 373 - 10);
+  TEST_COMPARE (stdc_leading_ones ((unsigned _BitInt(512)) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_leading_ones ((unsigned _BitInt(512)) 0),
+			       ui), 1);
+  TEST_COMPARE (stdc_leading_ones ((unsigned _BitInt(373)) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_leading_ones ((unsigned _BitInt(373)) 0),
+			       ui), 1);
+  TEST_COMPARE (stdc_leading_ones (~(unsigned _BitInt(512)) 0), 512);
+  TEST_COMPARE (stdc_leading_ones (~(unsigned _BitInt(373)) 0), 373);
+  TEST_COMPARE (stdc_leading_ones (~(unsigned _BitInt(512)) 275), 512 - 9);
+  TEST_COMPARE (stdc_leading_ones (~(unsigned _BitInt(373)) 512), 373 - 10);
+  TEST_COMPARE (stdc_trailing_zeros ((unsigned _BitInt(512)) 0), 512);
+  TEST_COMPARE (expr_has_type (stdc_trailing_zeros ((unsigned _BitInt(512)) 0),
+			       ui), 1);
+  TEST_COMPARE (stdc_trailing_zeros ((unsigned _BitInt(373)) 0), 373);
+  TEST_COMPARE (expr_has_type (stdc_trailing_zeros ((unsigned _BitInt(373)) 0),
+			       ui), 1);
+  TEST_COMPARE (stdc_trailing_zeros (~(unsigned _BitInt(512)) 0), 0);
+  TEST_COMPARE (stdc_trailing_zeros (~(unsigned _BitInt(373)) 0), 0);
+  TEST_COMPARE (stdc_trailing_zeros ((unsigned _BitInt(512)) 256), 8);
+  TEST_COMPARE (stdc_trailing_zeros ((unsigned _BitInt(373)) 512), 9);
+  TEST_COMPARE (stdc_trailing_ones ((unsigned _BitInt(512)) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_trailing_ones ((unsigned _BitInt(512)) 0),
+			       ui), 1);
+  TEST_COMPARE (stdc_trailing_ones ((unsigned _BitInt(373)) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_trailing_ones ((unsigned _BitInt(373)) 0),
+			       ui), 1);
+  TEST_COMPARE (stdc_trailing_ones (~(unsigned _BitInt(512)) 0), 512);
+  TEST_COMPARE (stdc_trailing_ones (~(unsigned _BitInt(373)) 0), 373);
+  TEST_COMPARE (stdc_trailing_ones ((unsigned _BitInt(512)) 255), 8);
+  TEST_COMPARE (stdc_trailing_ones ((~(unsigned _BitInt(373)) 0) >> 2),
+		373 - 2);
+  TEST_COMPARE (stdc_first_leading_zero ((unsigned _BitInt(512)) 0), 1);
+  TEST_COMPARE (expr_has_type (stdc_first_leading_zero ((unsigned _BitInt(512))
+							0), ui), 1);
+  TEST_COMPARE (stdc_first_leading_zero ((unsigned _BitInt(373)) 0), 1);
+  TEST_COMPARE (expr_has_type (stdc_first_leading_zero ((unsigned _BitInt(373))
+							0), ui), 1);
+  TEST_COMPARE (stdc_first_leading_zero (~(unsigned _BitInt(512)) 0), 0);
+  TEST_COMPARE (stdc_first_leading_zero (~(unsigned _BitInt(373)) 0), 0);
+  TEST_COMPARE (stdc_first_leading_zero (~(unsigned _BitInt(512)) 511),
+		512 - 8);
+  TEST_COMPARE (stdc_first_leading_zero (~(unsigned _BitInt(373)) 1023),
+		373 - 9);
+  TEST_COMPARE (stdc_first_leading_one ((unsigned _BitInt(512)) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_first_leading_one ((unsigned _BitInt(512))
+						       0), ui), 1);
+  TEST_COMPARE (stdc_first_leading_one ((unsigned _BitInt(373)) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_first_leading_one ((unsigned _BitInt(373))
+						       0), ui), 1);
+  TEST_COMPARE (stdc_first_leading_one (~(unsigned _BitInt(512)) 0), 1);
+  TEST_COMPARE (stdc_first_leading_one (~(unsigned _BitInt(373)) 0), 1);
+  TEST_COMPARE (stdc_first_leading_one ((unsigned _BitInt(512)) 275), 512 - 8);
+  TEST_COMPARE (stdc_first_leading_one ((unsigned _BitInt(373)) 512), 373 - 9);
+  TEST_COMPARE (stdc_first_trailing_zero ((unsigned _BitInt(512)) 0), 1);
+  TEST_COMPARE (expr_has_type (stdc_first_trailing_zero ((unsigned
+							  _BitInt(512)) 0),
+			       ui), 1);
+  TEST_COMPARE (stdc_first_trailing_zero ((unsigned _BitInt(373)) 0), 1);
+  TEST_COMPARE (expr_has_type (stdc_first_trailing_zero ((unsigned
+							  _BitInt(373)) 0),
+			       ui), 1);
+  TEST_COMPARE (stdc_first_trailing_zero (~(unsigned _BitInt(512)) 0), 0);
+  TEST_COMPARE (stdc_first_trailing_zero (~(unsigned _BitInt(373)) 0), 0);
+  TEST_COMPARE (stdc_first_trailing_zero ((unsigned _BitInt(512)) 255), 9);
+  TEST_COMPARE (stdc_first_trailing_zero ((unsigned _BitInt(373)) 511), 10);
+  TEST_COMPARE (stdc_first_trailing_one ((unsigned _BitInt(512)) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_first_trailing_one ((unsigned _BitInt(512))
+							0), ui), 1);
+  TEST_COMPARE (stdc_first_trailing_one ((unsigned _BitInt(373)) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_first_trailing_one ((unsigned _BitInt(373))
+							0), ui), 1);
+  TEST_COMPARE (stdc_first_trailing_one (~(unsigned _BitInt(512)) 0), 1);
+  TEST_COMPARE (stdc_first_trailing_one (~(unsigned _BitInt(373)) 0), 1);
+  TEST_COMPARE (stdc_first_trailing_one (((unsigned _BitInt(512)) 255) << 175),
+		176);
+  TEST_COMPARE (stdc_first_trailing_one ((~(unsigned _BitInt(373)) 0) << 311),
+		312);
+  TEST_COMPARE (stdc_count_zeros ((unsigned _BitInt(512)) 0), 512);
+  TEST_COMPARE (expr_has_type (stdc_count_zeros ((unsigned _BitInt(512)) 0),
+			       ui), 1);
+  TEST_COMPARE (stdc_count_zeros ((unsigned _BitInt(373)) 0), 373);
+  TEST_COMPARE (expr_has_type (stdc_count_zeros ((unsigned _BitInt(373)) 0),
+			       ui), 1);
+  TEST_COMPARE (stdc_count_zeros (~(unsigned _BitInt(512)) 0), 0);
+  TEST_COMPARE (stdc_count_zeros (~(unsigned _BitInt(373)) 0), 0);
+  TEST_COMPARE (stdc_count_zeros ((unsigned _BitInt(512)) 1315), 512 - 5);
+  TEST_COMPARE (stdc_count_zeros ((unsigned _BitInt(373)) 3363), 373 - 6);
+  TEST_COMPARE (stdc_count_ones ((unsigned _BitInt(512)) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_count_ones ((unsigned _BitInt(512)) 0),
+			       ui), 1);
+  TEST_COMPARE (stdc_count_ones ((unsigned _BitInt(373)) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_count_ones ((unsigned _BitInt(373)) 0),
+			       ui), 1);
+  TEST_COMPARE (stdc_count_ones (~(unsigned _BitInt(512)) 0), 512);
+  TEST_COMPARE (stdc_count_ones (~(unsigned _BitInt(373)) 0), 373);
+  TEST_COMPARE (stdc_count_ones (~(unsigned _BitInt(512)) 1315), 512 - 5);
+  TEST_COMPARE (stdc_count_ones (~(unsigned _BitInt(373)) 3363), 373 - 6);
+  TEST_COMPARE (stdc_has_single_bit ((unsigned _BitInt(512)) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_has_single_bit ((unsigned _BitInt(512)) 0),
+			       _Bool), 1);
+  TEST_COMPARE (stdc_has_single_bit ((unsigned _BitInt(373)) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_has_single_bit ((unsigned _BitInt(373)) 0),
+			       _Bool), 1);
+  TEST_COMPARE (stdc_has_single_bit (~(unsigned _BitInt(512)) 0), 0);
+  TEST_COMPARE (stdc_has_single_bit (~(unsigned _BitInt(373)) 0), 0);
+  TEST_COMPARE (stdc_has_single_bit (((unsigned _BitInt(512)) 1022) << 279),
+		0);
+  TEST_COMPARE (stdc_has_single_bit (((unsigned _BitInt(373)) 12) << 305), 0);
+  TEST_COMPARE (stdc_bit_width ((unsigned _BitInt(512)) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_bit_width ((unsigned _BitInt(512)) 0),
+			       ui), 1);
+  TEST_COMPARE (stdc_bit_width ((unsigned _BitInt(373)) 0), 0);
+  TEST_COMPARE (expr_has_type (stdc_bit_width ((unsigned _BitInt(373)) 0),
+			       ui), 1);
+  TEST_COMPARE (stdc_bit_width (~(unsigned _BitInt(512)) 0), 512);
+  TEST_COMPARE (stdc_bit_width (~(unsigned _BitInt(373)) 0), 373);
+  TEST_COMPARE (stdc_bit_width (((unsigned _BitInt(512)) 1023) << 405),
+		405 + 10);
+  TEST_COMPARE (stdc_bit_width (((unsigned _BitInt(373)) 1024) << 242),
+		242 + 11);
+  TEST_COMPARE (stdc_bit_floor ((unsigned _BitInt(512)) 0) != 0, 0);
+  TEST_COMPARE (expr_has_type (stdc_bit_floor ((unsigned _BitInt(512)) 0),
+			       unsigned _BitInt(512)), 1);
+  TEST_COMPARE (stdc_bit_floor ((unsigned _BitInt(373)) 0) != 0, 0);
+  TEST_COMPARE (expr_has_type (stdc_bit_floor ((unsigned _BitInt(373)) 0),
+			       unsigned _BitInt(373)), 1);
+  TEST_COMPARE (stdc_bit_floor (~(unsigned _BitInt(512)) 0)
+		!= ((unsigned _BitInt(512)) 1) << (512 - 1), 0);
+  TEST_COMPARE (stdc_bit_floor (~(unsigned _BitInt(373)) 0)
+		!= ((unsigned _BitInt(373)) 1) << (373 - 1), 0);
+  TEST_COMPARE (stdc_bit_floor (((unsigned _BitInt(512)) 511) << 405)
+		!= (((unsigned _BitInt(512)) 256) << 405), 0);
+  TEST_COMPARE (stdc_bit_floor (((unsigned _BitInt(373)) 512) << 242)
+		!= (((unsigned _BitInt(512)) 512) << 242), 0);
+  TEST_COMPARE (stdc_bit_ceil ((unsigned _BitInt(512)) 0) != 1, 0);
+  TEST_COMPARE (expr_has_type (stdc_bit_ceil ((unsigned _BitInt(512)) 0),
+			       unsigned _BitInt(512)), 1);
+  TEST_COMPARE (stdc_bit_ceil ((unsigned _BitInt(373)) 0) != 1, 0);
+  TEST_COMPARE (expr_has_type (stdc_bit_ceil ((unsigned _BitInt(373)) 0),
+			       unsigned _BitInt(373)), 1);
+  TEST_COMPARE (stdc_bit_ceil (~(unsigned _BitInt(512)) 0) != 0, 0);
+  TEST_COMPARE (stdc_bit_ceil (~(unsigned _BitInt(373)) 0) != 0, 0);
+  TEST_COMPARE (stdc_bit_ceil (((unsigned _BitInt(512)) 1) << (512 - 1))
+		!= ((unsigned _BitInt(512)) 1) << (512 - 1), 0);
+  TEST_COMPARE (stdc_bit_ceil ((~(unsigned _BitInt(373)) 0) >> 1)
+		!= ((unsigned _BitInt(373)) 1) << (373 - 1), 0);
+  TEST_COMPARE (stdc_bit_ceil (((unsigned _BitInt(512)) 512) << 405)
+		!= (((unsigned _BitInt(512)) 512) << 405), 0);
+  TEST_COMPARE (stdc_bit_ceil (((unsigned _BitInt(373)) 513) << 242)
+		!= (((unsigned _BitInt(512)) 1024) << 242), 0);
+  TEST_COMPARE (stdc_bit_floor ((unsigned _BitInt(BITINT_MAXWIDTH)) 0) != 0,
+		0);
+  TEST_COMPARE (stdc_bit_floor (~(unsigned _BitInt(BITINT_MAXWIDTH)) 0)
+		!= ((unsigned _BitInt(BITINT_MAXWIDTH)) 1) << (BITINT_MAXWIDTH
+							       - 1), 0);
+  TEST_COMPARE (stdc_bit_floor (((unsigned _BitInt(BITINT_MAXWIDTH)) 511)
+				<< 405)
+		!= (((unsigned _BitInt(BITINT_MAXWIDTH)) 256) << 405), 0);
+  TEST_COMPARE (stdc_bit_floor (((unsigned _BitInt(BITINT_MAXWIDTH)) 512)
+				<< 405)
+		!= (((unsigned _BitInt(BITINT_MAXWIDTH)) 512) << 405), 0);
+  TEST_COMPARE (stdc_bit_ceil ((unsigned _BitInt(BITINT_MAXWIDTH)) 0) != 1, 0);
+  TEST_COMPARE (stdc_bit_ceil (~(unsigned _BitInt(BITINT_MAXWIDTH)) 0) != 0,
+		0);
+  TEST_COMPARE (stdc_bit_ceil (((unsigned _BitInt(BITINT_MAXWIDTH)) 1)
+			       << (BITINT_MAXWIDTH - 1))
+		!= ((unsigned _BitInt(BITINT_MAXWIDTH)) 1) << (BITINT_MAXWIDTH
+							       - 1), 0);
+  TEST_COMPARE (stdc_bit_ceil (((unsigned _BitInt(BITINT_MAXWIDTH)) 512)
+			       << 405)
+		!= (((unsigned _BitInt(BITINT_MAXWIDTH)) 512) << 405), 0);
+  TEST_COMPARE (stdc_bit_ceil (((unsigned _BitInt(BITINT_MAXWIDTH)) 513)
+			       << 405)
+		!= (((unsigned _BitInt(BITINT_MAXWIDTH)) 1024) << 405), 0);
+#  endif
+# endif
+  return 0;
+}
+#else
+static int
+do_test (void)
+{
+  return 0;
+}
+#endif
+
+#include <support/test-driver.c>