diff mbox series

v4: Use gcc __builtin_stdc_* builtins in stdbit.h if possible

Message ID ZbgiYXmeB4poXuTa@tucnak
State New
Headers show
Series v4: Use gcc __builtin_stdc_* builtins in stdbit.h if possible | expand

Commit Message

Jakub Jelinek Jan. 29, 2024, 10:10 p.m. UTC 
On Mon, Jan 29, 2024 at 09:30:19PM +0000, Joseph Myers wrote:
> On Mon, 29 Jan 2024, Jakub Jelinek wrote:
> 
> > Most of the other tests (except the tests for side-effects in arguments)
> > have constant arguments and so can be folded very early during compilation,
> > even the side-effects in arguments tests can be folded soon when optimizing,
> > so these functions were just an attempt to make sure the macros can be
> > compiled/linked when the arguments are certainly not known.
> > But if you think it isn't worth checking that or if it is already tested by
> > some other test, I can remove that.
> 
> I think the existing tests adequately cover non-constant arguments 
> (non-constant unless you unroll the test loop and extract the arguments 
> from a const array of structures then propagate from the variable storing 
> them after loading from the array, that is).  What the existing tests 
> don't actually cover for standard types (and this new test does cover) is 
> constant arguments.

Ok, removed that part of the test.

> Note that as we're currently in release freeze for glibc 2.39, a new 
> feature change such as this should probably only go in before 2.39 is 
> released with the approval of Andreas K. Hüttel as release manager (while 
> if going in after 2.39 is released, the new feature of unsigned __int128 / 
> unsigned _BitInt support should get a NEWS entry for 2.40).

Andreas, your thoughts on whether this can be added to 2.39 or needs to wait
for 2.40?  It is an extension to a new feature (stdbit.h has been added on
3rd of January) and doesn't have ABI consequences.



	Jakub

Comments

Andreas K. Huettel Jan. 30, 2024, 12:28 a.m. UTC | #1 
Am Montag, 29. Januar 2024, 23:10:41 CET schrieb Jakub Jelinek:
> On Mon, Jan 29, 2024 at 09:30:19PM +0000, Joseph Myers wrote:
> > On Mon, 29 Jan 2024, Jakub Jelinek wrote:
> > 
> > > Most of the other tests (except the tests for side-effects in arguments)
> > > have constant arguments and so can be folded very early during compilation,
> > > even the side-effects in arguments tests can be folded soon when optimizing,
> > > so these functions were just an attempt to make sure the macros can be
> > > compiled/linked when the arguments are certainly not known.
> > > But if you think it isn't worth checking that or if it is already tested by
> > > some other test, I can remove that.
> > 
> > I think the existing tests adequately cover non-constant arguments 
> > (non-constant unless you unroll the test loop and extract the arguments 
> > from a const array of structures then propagate from the variable storing 
> > them after loading from the array, that is).  What the existing tests 
> > don't actually cover for standard types (and this new test does cover) is 
> > constant arguments.
> 
> Ok, removed that part of the test.
> 
> > Note that as we're currently in release freeze for glibc 2.39, a new 
> > feature change such as this should probably only go in before 2.39 is 
> > released with the approval of Andreas K. Hüttel as release manager (while 
> > if going in after 2.39 is released, the new feature of unsigned __int128 / 
> > unsigned _BitInt support should get a NEWS entry for 2.40).
> 
> Andreas, your thoughts on whether this can be added to 2.39 or needs to wait
> for 2.40?  It is an extension to a new feature (stdbit.h has been added on
> 3rd of January) and doesn't have ABI consequences.

Hi Jakub, let's please do this after the release (i.e. for 2.40). 

I plan to branch tomorrow or wednesday, which means there is barely any time
for wider testing anymore.

Thanks! A
Joseph Myers Jan. 31, 2024, 6:03 p.m. UTC | #2 
On Tue, 30 Jan 2024, Andreas K. Huettel wrote:

> > > Note that as we're currently in release freeze for glibc 2.39, a new 
> > > feature change such as this should probably only go in before 2.39 is 
> > > released with the approval of Andreas K. Hüttel as release manager (while 
> > > if going in after 2.39 is released, the new feature of unsigned __int128 / 
> > > unsigned _BitInt support should get a NEWS entry for 2.40).
> > 
> > Andreas, your thoughts on whether this can be added to 2.39 or needs to wait
> > for 2.40?  It is an extension to a new feature (stdbit.h has been added on
> > 3rd of January) and doesn't have ABI consequences.
> 
> Hi Jakub, let's please do this after the release (i.e. for 2.40). 
> 
> I plan to branch tomorrow or wednesday, which means there is barely any time
> for wider testing anymore.

Now that 2.39 has branched, I think this can go in (with a NEWS entry 
under "Major new features" for 2.40 to indicate it's a new user-visible 
feature).
Mark Wielaard Feb. 1, 2024, 10:12 a.m. UTC | #3 
Hi Jakub,

On Mon, Jan 29, 2024 at 11:10:41PM +0100, Jakub Jelinek wrote:
> diff --git a/manual/stdbit.texi b/manual/stdbit.texi
> index fe41c671d8..8688930f12 100644
> --- a/manual/stdbit.texi
> +++ b/manual/stdbit.texi
> @@ -32,7 +32,13 @@ 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
> +@uref{https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html@code{__builtin_stdc_bit_ceil}},
> +etc.@:, built-in functions such as GCC 14.1 or later
> +any unsigned integer type those built-in functions support.
> +In GCC 14.1 that includes support for @code{unsigned __int128} and
> +@code{unsigned _BitInt(@var{n})} if supported by the target.
>  
>  @deftypefun {unsigned int} stdc_leading_zeros_uc (unsigned char @var{x})
>  @deftypefunx {unsigned int} stdc_leading_zeros_us (unsigned short @var{x})

make pdf didn't like that new @uref construct:
https://builder.sourceware.org/buildbot/#/builders/264/builds/282
https://builder.sourceware.org/buildbot/api/v2/logs/7481911/raw

(/home/builder/shared/snapshots/worker/glibc-snapshots-trunk/glibc-build/glibc-
dist/manual/stdbit.texi Chapter 21 [668]
/home/builder/shared/snapshots/worker/glibc-snapshots-trunk/glibc-build/glibc-d
ist/manual/stdbit.texi:37: Argument of @temp has an extra }.
<inserted text> 
                @par 
<to be read again> 
                   }
@pdfurl ...btype /Link /A << /S /URI /URI (#1) >>}
                                                  @endgroup 
@urefbreakfinish ...sh ->@unsepspaces @pdfurl {#1}
                                                  @setbox 0 = @hbox {@ignore...
l.37 ...iltins.html@code{__builtin_stdc_bit_ceil}}
                                                  ,
? 
/home/builder/shared/snapshots/worker/glibc-snapshots-trunk/glibc-build/glibc-d
ist/manual/stdbit.texi:37: Emergency stop.
<inserted text> 
                @par 
<to be read again> 
                   }
@pdfurl ...btype /Link /A << /S /URI /URI (#1) >>}
                                                  @endgroup 
@urefbreakfinish ...sh ->@unsepspaces @pdfurl {#1}
                                                  @setbox 0 = @hbox {@ignore...
l.37 ...iltins.html@code{__builtin_stdc_bit_ceil}}
                                                  ,
/home/builder/shared/snapshots/worker/glibc-snapshots-trunk/glibc-build/glibc-d
ist/manual/stdbit.texi:37:  ==> Fatal error occurred, no output PDF file produc
ed!

make info; make html; make dvi
are all fine however.
Mark Wielaard Feb. 1, 2024, 10:23 a.m. UTC | #4 
On Thu, Feb 01, 2024 at 11:12:53AM +0100, Mark Wielaard wrote:
> On Mon, Jan 29, 2024 at 11:10:41PM +0100, Jakub Jelinek wrote:
> > diff --git a/manual/stdbit.texi b/manual/stdbit.texi
> > index fe41c671d8..8688930f12 100644
> > --- a/manual/stdbit.texi
> > +++ b/manual/stdbit.texi
> > @@ -32,7 +32,13 @@ 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
> > +@uref{https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html@code{__builtin_stdc_bit_ceil}},
> > +etc.@:, built-in functions such as GCC 14.1 or later
> > +any unsigned integer type those built-in functions support.
> > +In GCC 14.1 that includes support for @code{unsigned __int128} and
> > +@code{unsigned _BitInt(@var{n})} if supported by the target.
> >  
> >  @deftypefun {unsigned int} stdc_leading_zeros_uc (unsigned char @var{x})
> >  @deftypefunx {unsigned int} stdc_leading_zeros_us (unsigned short @var{x})
> 
> make pdf didn't like that new @uref construct:
> https://builder.sourceware.org/buildbot/#/builders/264/builds/282
> https://builder.sourceware.org/buildbot/api/v2/logs/7481911/raw
> 
> (/home/builder/shared/snapshots/worker/glibc-snapshots-trunk/glibc-build/glibc-
> dist/manual/stdbit.texi Chapter 21 [668]
> /home/builder/shared/snapshots/worker/glibc-snapshots-trunk/glibc-build/glibc-d
> ist/manual/stdbit.texi:37: Argument of @temp has an extra }.
> <inserted text> 
>                 @par 
> <to be read again> 
>                    }
> @pdfurl ...btype /Link /A << /S /URI /URI (#1) >>}
>                                                   @endgroup 
> @urefbreakfinish ...sh ->@unsepspaces @pdfurl {#1}
>                                                   @setbox 0 = @hbox {@ignore...
> l.37 ...iltins.html@code{__builtin_stdc_bit_ceil}}
>                                                   ,
> ? 
> /home/builder/shared/snapshots/worker/glibc-snapshots-trunk/glibc-build/glibc-d
> ist/manual/stdbit.texi:37: Emergency stop.
> <inserted text> 
>                 @par 
> <to be read again> 
>                    }
> @pdfurl ...btype /Link /A << /S /URI /URI (#1) >>}
>                                                   @endgroup 
> @urefbreakfinish ...sh ->@unsepspaces @pdfurl {#1}
>                                                   @setbox 0 = @hbox {@ignore...
> l.37 ...iltins.html@code{__builtin_stdc_bit_ceil}}
>                                                   ,
> /home/builder/shared/snapshots/worker/glibc-snapshots-trunk/glibc-build/glibc-d
> ist/manual/stdbit.texi:37:  ==> Fatal error occurred, no output PDF file produc
> ed!
> 
> make info; make html; make dvi
> are all fine however.

But do note that the URL doesn't come out correctly even in the HTML
case:
https://snapshots.sourceware.org/glibc/trunk/latest/manual/libc.html#Bit-Manipulation

It shows and links to:
https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html__builtin_stdc_bit_ceil
which should be:
https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html#index-_005f_005fbuiltin_005fstdc_005fbit_005fceil

Cheers,

Mark
diff mbox series

Patch

diff --git a/manual/stdbit.texi b/manual/stdbit.texi
index fe41c671d8..8688930f12 100644
--- a/manual/stdbit.texi
+++ b/manual/stdbit.texi
@@ -32,7 +32,13 @@  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
+@uref{https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html@code{__builtin_stdc_bit_ceil}},
+etc.@:, built-in functions such as GCC 14.1 or later
+any unsigned integer type those built-in functions support.
+In GCC 14.1 that includes support for @code{unsigned __int128} and
+@code{unsigned _BitInt(@var{n})} if supported by the target.
 
 @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..536841ca8a
--- /dev/null
+++ b/stdlib/tst-stdbit-builtins.c
@@ -0,0 +1,778 @@ 
+/* 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;
+
+# 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>