diff mbox series

[v4] c-format: Add -Wformat-int-precision option [PR80060]

Message ID 20211127221823.301408-1-daniil.stas@posteo.net
State New
Headers
Series [v4] c-format: Add -Wformat-int-precision option [PR80060] |

Commit Message

Daniil Stas Nov. 27, 2021, 10:18 p.m. UTC 
  This option is enabled by default when -Wformat option is enabled. A
user can specify -Wno-format-int-precision to disable emitting
warnings when passing an argument of an incompatible integer type to
a 'd', 'i', 'b', 'B', 'o', 'u', 'x', or 'X' conversion specifier when
it has the same precision as the expected type.

Signed-off-by: Daniil Stas <daniil.stas@posteo.net>

gcc/c-family/ChangeLog:

	* c-format.c (check_format_types): Don't emit warnings when
	passing an argument of an incompatible integer type to
	a 'd', 'i', 'b', 'B', 'o', 'u', 'x', or 'X' conversion
	specifier when it has the same precision as the expected type
	if -Wno-format-int-precision option is specified.
	* c.opt: Add -Wformat-int-precision option.

gcc/ChangeLog:

	* doc/invoke.texi: Add -Wformat-int-precision option description.

gcc/testsuite/ChangeLog:

	* c-c++-common/Wformat-int-precision-1.c: New test.
	* c-c++-common/Wformat-int-precision-2.c: New test.
---
Changes for v4:
  - Added 'b' and 'B' format specifiers to the option descriptions.

Changes for v3:
  - Added additional @code{} derictives to the documentation where needed.
  - Changed tests to run on "! long_neq_int" target instead of "lp64".
  - Added a test case to check that gcc still emits warnings for arguments
  with different precision even with -Wno-format-int-precision option enabled.

Changes for v2:
  - Changed the option name to -Wformat-int-precision.
  - Changed the option description as was suggested by Martin.
  - Changed Wformat-int-precision-2.c to use dg-bogus instead of previous
  invalid syntax.

 gcc/c-family/c-format.c                         |  2 +-
 gcc/c-family/c.opt                              |  6 ++++++
 gcc/doc/invoke.texi                             | 17 ++++++++++++++++-
 .../c-c++-common/Wformat-int-precision-1.c      |  7 +++++++
 .../c-c++-common/Wformat-int-precision-2.c      |  8 ++++++++
 5 files changed, 38 insertions(+), 2 deletions(-)
 create mode 100644 gcc/testsuite/c-c++-common/Wformat-int-precision-1.c
 create mode 100644 gcc/testsuite/c-c++-common/Wformat-int-precision-2.c

Comments

Daniil Stas Dec. 20, 2021, 10:43 p.m. UTC | #1 
On Sat, 27 Nov 2021 22:18:23 +0000
Daniil Stas <daniil.stas@posteo.net> wrote:

> This option is enabled by default when -Wformat option is enabled. A
> user can specify -Wno-format-int-precision to disable emitting
> warnings when passing an argument of an incompatible integer type to
> a 'd', 'i', 'b', 'B', 'o', 'u', 'x', or 'X' conversion specifier when
> it has the same precision as the expected type.
> 
> Signed-off-by: Daniil Stas <daniil.stas@posteo.net>
> 
> gcc/c-family/ChangeLog:
> 
> 	* c-format.c (check_format_types): Don't emit warnings when
> 	passing an argument of an incompatible integer type to
> 	a 'd', 'i', 'b', 'B', 'o', 'u', 'x', or 'X' conversion
> 	specifier when it has the same precision as the expected type
> 	if -Wno-format-int-precision option is specified.
> 	* c.opt: Add -Wformat-int-precision option.
> 
> gcc/ChangeLog:
> 
> 	* doc/invoke.texi: Add -Wformat-int-precision option
> description.
> 
> gcc/testsuite/ChangeLog:
> 
> 	* c-c++-common/Wformat-int-precision-1.c: New test.
> 	* c-c++-common/Wformat-int-precision-2.c: New test.
> ---
> Changes for v4:
>   - Added 'b' and 'B' format specifiers to the option descriptions.
> 
> Changes for v3:
>   - Added additional @code{} derictives to the documentation where
> needed.
>   - Changed tests to run on "! long_neq_int" target instead of "lp64".
>   - Added a test case to check that gcc still emits warnings for
> arguments with different precision even with
> -Wno-format-int-precision option enabled.
> 
> Changes for v2:
>   - Changed the option name to -Wformat-int-precision.
>   - Changed the option description as was suggested by Martin.
>   - Changed Wformat-int-precision-2.c to use dg-bogus instead of
> previous invalid syntax.
> 
>  gcc/c-family/c-format.c                         |  2 +-
>  gcc/c-family/c.opt                              |  6 ++++++
>  gcc/doc/invoke.texi                             | 17
> ++++++++++++++++- .../c-c++-common/Wformat-int-precision-1.c      |
> 7 +++++++ .../c-c++-common/Wformat-int-precision-2.c      |  8
> ++++++++ 5 files changed, 38 insertions(+), 2 deletions(-)
>  create mode 100644
> gcc/testsuite/c-c++-common/Wformat-int-precision-1.c create mode
> 100644 gcc/testsuite/c-c++-common/Wformat-int-precision-2.c
> 
> diff --git a/gcc/c-family/c-format.c b/gcc/c-family/c-format.c
> index e735e092043..c66787f931f 100644
> --- a/gcc/c-family/c-format.c
> +++ b/gcc/c-family/c-format.c
> @@ -4248,7 +4248,7 @@ check_format_types (const substring_loc
> &fmt_loc, && (!pedantic || i < 2)
>  	  && char_type_flag)
>  	continue;
> -      if (types->scalar_identity_flag
> +      if ((types->scalar_identity_flag || !warn_format_int_precision)
>  	  && (TREE_CODE (cur_type) == TREE_CODE (wanted_type)
>  	      || (INTEGRAL_TYPE_P (cur_type)
>  		  && INTEGRAL_TYPE_P (wanted_type)))
> diff --git a/gcc/c-family/c.opt b/gcc/c-family/c.opt
> index 4b8a094b206..d7d952765c6 100644
> --- a/gcc/c-family/c.opt
> +++ b/gcc/c-family/c.opt
> @@ -684,6 +684,12 @@ C ObjC C++ LTO ObjC++ Warning
> Alias(Wformat-overflow=, 1, 0) IntegerRange(0, 2) Warn about function
> calls with format strings that write past the end of the destination
> region.  Same as -Wformat-overflow=1. 
> +Wformat-int-precision
> +C ObjC C++ ObjC++ Var(warn_format_int_precision) Warning
> LangEnabledBy(C ObjC C++ ObjC++,Wformat=,warn_format >= 1, 0) +Warn
> when passing an argument of an incompatible integer type to a 'd',
> 'i', +'b', 'B', 'o', 'u', 'x', or 'X' conversion specifier even when
> it has the same +precision as the expected type. +
>  Wformat-security
>  C ObjC C++ ObjC++ Var(warn_format_security) Warning LangEnabledBy(C
> ObjC C++ ObjC++,Wformat=, warn_format >= 2, 0) Warn about possible
> security problems with format functions. diff --git
> a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index
> 3bddfbaae6a..94a7ad96c50 100644 --- a/gcc/doc/invoke.texi
> +++ b/gcc/doc/invoke.texi
> @@ -351,7 +351,7 @@ Objective-C and Objective-C++ Dialects}.
>  -Werror  -Werror=*  -Wexpansion-to-defined  -Wfatal-errors @gol
>  -Wfloat-conversion  -Wfloat-equal  -Wformat  -Wformat=2 @gol
>  -Wno-format-contains-nul  -Wno-format-extra-args  @gol
> --Wformat-nonliteral  -Wformat-overflow=@var{n} @gol
> +-Wformat-nonliteral  -Wformat-overflow=@var{n}
> -Wformat-int-precision @gol -Wformat-security  -Wformat-signedness
> -Wformat-truncation=@var{n} @gol -Wformat-y2k  -Wframe-address @gol
>  -Wframe-larger-than=@var{byte-size}  -Wno-free-nonheap-object @gol
> @@ -6122,6 +6122,21 @@ If @option{-Wformat} is specified, also warn
> if the format string is not a string literal and so cannot be
> checked, unless the format function takes its format arguments as a
> @code{va_list}. 
> +@item -Wformat-int-precision
> +@opindex Wformat-int-precision
> +@opindex Wno-format-int-precision
> +Warn when passing an argument of an incompatible integer type to
> +a @samp{d}, @samp{i}, @samp{b}, @samp{B}, @samp{o}, @samp{u},
> @samp{x}, +or @samp{X} conversion specifier even when it has the same
> precision as +the expected type.  For example, on targets where
> @code{int64_t} is a typedef +for @code{long}, the warning is issued
> for the @code{printf} call below even +when both @code{long} and
> @code{long long} have the same size and precision. +
> +@smallexample
> +  extern int64_t n;
> +  printf ("%lli", n);
> +@end smallexample
> +
>  @item -Wformat-security
>  @opindex Wformat-security
>  @opindex Wno-format-security
> diff --git a/gcc/testsuite/c-c++-common/Wformat-int-precision-1.c
> b/gcc/testsuite/c-c++-common/Wformat-int-precision-1.c new file mode
> 100644 index 00000000000..a06e047c933
> --- /dev/null
> +++ b/gcc/testsuite/c-c++-common/Wformat-int-precision-1.c
> @@ -0,0 +1,7 @@
> +/* { dg-do compile { target { ! long_neq_int } } } */
> +/* { dg-options "-Wformat" } */
> +
> +void test ()
> +{
> +  __builtin_printf ("%d\n", (long) 1); /* { dg-warning "expects
> argument of type" } */ +}
> diff --git a/gcc/testsuite/c-c++-common/Wformat-int-precision-2.c
> b/gcc/testsuite/c-c++-common/Wformat-int-precision-2.c new file mode
> 100644 index 00000000000..e9b41b4f42e
> --- /dev/null
> +++ b/gcc/testsuite/c-c++-common/Wformat-int-precision-2.c
> @@ -0,0 +1,8 @@
> +/* { dg-do compile { target { ! long_neq_int } } } */
> +/* { dg-options "-Wformat -Wno-format-int-precision" } */
> +
> +void test ()
> +{
> +  __builtin_printf ("%d\n", (long) 1); /* { dg-bogus "expects
> argument of type" } */
> +  __builtin_printf ("%d\n", (long long) 1); /* { dg-warning "expects
> argument of type" "" { target int32 } } */ +}

Hi Joseph,
Can your review this patch?

Thank you
Daniil Stas Jan. 7, 2022, 4:25 p.m. UTC | #2 
On Tue, 21 Dec 2021 00:43:24 +0200
Daniil Stas <daniil.stas@posteo.net> wrote:

> On Sat, 27 Nov 2021 22:18:23 +0000
> Daniil Stas <daniil.stas@posteo.net> wrote:
> 
> > This option is enabled by default when -Wformat option is enabled. A
> > user can specify -Wno-format-int-precision to disable emitting
> > warnings when passing an argument of an incompatible integer type to
> > a 'd', 'i', 'b', 'B', 'o', 'u', 'x', or 'X' conversion specifier
> > when it has the same precision as the expected type.
> > 
> > Signed-off-by: Daniil Stas <daniil.stas@posteo.net>
> > 
> > gcc/c-family/ChangeLog:
> > 
> > 	* c-format.c (check_format_types): Don't emit warnings when
> > 	passing an argument of an incompatible integer type to
> > 	a 'd', 'i', 'b', 'B', 'o', 'u', 'x', or 'X' conversion
> > 	specifier when it has the same precision as the expected
> > type if -Wno-format-int-precision option is specified.
> > 	* c.opt: Add -Wformat-int-precision option.
> > 
> > gcc/ChangeLog:
> > 
> > 	* doc/invoke.texi: Add -Wformat-int-precision option
> > description.
> > 
> > gcc/testsuite/ChangeLog:
> > 
> > 	* c-c++-common/Wformat-int-precision-1.c: New test.
> > 	* c-c++-common/Wformat-int-precision-2.c: New test.
> > ---
> > Changes for v4:
> >   - Added 'b' and 'B' format specifiers to the option descriptions.
> > 
> > Changes for v3:
> >   - Added additional @code{} derictives to the documentation where
> > needed.
> >   - Changed tests to run on "! long_neq_int" target instead of
> > "lp64".
> >   - Added a test case to check that gcc still emits warnings for
> > arguments with different precision even with
> > -Wno-format-int-precision option enabled.
> > 
> > Changes for v2:
> >   - Changed the option name to -Wformat-int-precision.
> >   - Changed the option description as was suggested by Martin.
> >   - Changed Wformat-int-precision-2.c to use dg-bogus instead of
> > previous invalid syntax.
> > 
> >  gcc/c-family/c-format.c                         |  2 +-
> >  gcc/c-family/c.opt                              |  6 ++++++
> >  gcc/doc/invoke.texi                             | 17
> > ++++++++++++++++- .../c-c++-common/Wformat-int-precision-1.c      |
> > 7 +++++++ .../c-c++-common/Wformat-int-precision-2.c      |  8
> > ++++++++ 5 files changed, 38 insertions(+), 2 deletions(-)
> >  create mode 100644
> > gcc/testsuite/c-c++-common/Wformat-int-precision-1.c create mode
> > 100644 gcc/testsuite/c-c++-common/Wformat-int-precision-2.c
> > 
> > diff --git a/gcc/c-family/c-format.c b/gcc/c-family/c-format.c
> > index e735e092043..c66787f931f 100644
> > --- a/gcc/c-family/c-format.c
> > +++ b/gcc/c-family/c-format.c
> > @@ -4248,7 +4248,7 @@ check_format_types (const substring_loc
> > &fmt_loc, && (!pedantic || i < 2)
> >  	  && char_type_flag)
> >  	continue;
> > -      if (types->scalar_identity_flag
> > +      if ((types->scalar_identity_flag ||
> > !warn_format_int_precision) && (TREE_CODE (cur_type) == TREE_CODE
> > (wanted_type) || (INTEGRAL_TYPE_P (cur_type)
> >  		  && INTEGRAL_TYPE_P (wanted_type)))
> > diff --git a/gcc/c-family/c.opt b/gcc/c-family/c.opt
> > index 4b8a094b206..d7d952765c6 100644
> > --- a/gcc/c-family/c.opt
> > +++ b/gcc/c-family/c.opt
> > @@ -684,6 +684,12 @@ C ObjC C++ LTO ObjC++ Warning
> > Alias(Wformat-overflow=, 1, 0) IntegerRange(0, 2) Warn about
> > function calls with format strings that write past the end of the
> > destination region.  Same as -Wformat-overflow=1. 
> > +Wformat-int-precision
> > +C ObjC C++ ObjC++ Var(warn_format_int_precision) Warning
> > LangEnabledBy(C ObjC C++ ObjC++,Wformat=,warn_format >= 1, 0) +Warn
> > when passing an argument of an incompatible integer type to a 'd',
> > 'i', +'b', 'B', 'o', 'u', 'x', or 'X' conversion specifier even when
> > it has the same +precision as the expected type. +
> >  Wformat-security
> >  C ObjC C++ ObjC++ Var(warn_format_security) Warning LangEnabledBy(C
> > ObjC C++ ObjC++,Wformat=, warn_format >= 2, 0) Warn about possible
> > security problems with format functions. diff --git
> > a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index
> > 3bddfbaae6a..94a7ad96c50 100644 --- a/gcc/doc/invoke.texi
> > +++ b/gcc/doc/invoke.texi
> > @@ -351,7 +351,7 @@ Objective-C and Objective-C++ Dialects}.
> >  -Werror  -Werror=*  -Wexpansion-to-defined  -Wfatal-errors @gol
> >  -Wfloat-conversion  -Wfloat-equal  -Wformat  -Wformat=2 @gol
> >  -Wno-format-contains-nul  -Wno-format-extra-args  @gol
> > --Wformat-nonliteral  -Wformat-overflow=@var{n} @gol
> > +-Wformat-nonliteral  -Wformat-overflow=@var{n}
> > -Wformat-int-precision @gol -Wformat-security  -Wformat-signedness
> > -Wformat-truncation=@var{n} @gol -Wformat-y2k  -Wframe-address @gol
> >  -Wframe-larger-than=@var{byte-size}  -Wno-free-nonheap-object @gol
> > @@ -6122,6 +6122,21 @@ If @option{-Wformat} is specified, also warn
> > if the format string is not a string literal and so cannot be
> > checked, unless the format function takes its format arguments as a
> > @code{va_list}. 
> > +@item -Wformat-int-precision
> > +@opindex Wformat-int-precision
> > +@opindex Wno-format-int-precision
> > +Warn when passing an argument of an incompatible integer type to
> > +a @samp{d}, @samp{i}, @samp{b}, @samp{B}, @samp{o}, @samp{u},
> > @samp{x}, +or @samp{X} conversion specifier even when it has the
> > same precision as +the expected type.  For example, on targets where
> > @code{int64_t} is a typedef +for @code{long}, the warning is issued
> > for the @code{printf} call below even +when both @code{long} and
> > @code{long long} have the same size and precision. +
> > +@smallexample
> > +  extern int64_t n;
> > +  printf ("%lli", n);
> > +@end smallexample
> > +
> >  @item -Wformat-security
> >  @opindex Wformat-security
> >  @opindex Wno-format-security
> > diff --git a/gcc/testsuite/c-c++-common/Wformat-int-precision-1.c
> > b/gcc/testsuite/c-c++-common/Wformat-int-precision-1.c new file mode
> > 100644 index 00000000000..a06e047c933
> > --- /dev/null
> > +++ b/gcc/testsuite/c-c++-common/Wformat-int-precision-1.c
> > @@ -0,0 +1,7 @@
> > +/* { dg-do compile { target { ! long_neq_int } } } */
> > +/* { dg-options "-Wformat" } */
> > +
> > +void test ()
> > +{
> > +  __builtin_printf ("%d\n", (long) 1); /* { dg-warning "expects
> > argument of type" } */ +}
> > diff --git a/gcc/testsuite/c-c++-common/Wformat-int-precision-2.c
> > b/gcc/testsuite/c-c++-common/Wformat-int-precision-2.c new file mode
> > 100644 index 00000000000..e9b41b4f42e
> > --- /dev/null
> > +++ b/gcc/testsuite/c-c++-common/Wformat-int-precision-2.c
> > @@ -0,0 +1,8 @@
> > +/* { dg-do compile { target { ! long_neq_int } } } */
> > +/* { dg-options "-Wformat -Wno-format-int-precision" } */
> > +
> > +void test ()
> > +{
> > +  __builtin_printf ("%d\n", (long) 1); /* { dg-bogus "expects
> > argument of type" } */
> > +  __builtin_printf ("%d\n", (long long) 1); /* { dg-warning
> > "expects argument of type" "" { target int32 } } */ +}  
> 
> Hi Joseph,
> Can your review this patch?
> 
> Thank you

Ping
Joseph Myers Jan. 7, 2022, 8 p.m. UTC | #3 
On Fri, 7 Jan 2022, Daniil Stas via Gcc-patches wrote:

> > > @@ -4248,7 +4248,7 @@ check_format_types (const substring_loc
> > > &fmt_loc, && (!pedantic || i < 2)
> > >  	  && char_type_flag)
> > >  	continue;
> > > -      if (types->scalar_identity_flag
> > > +      if ((types->scalar_identity_flag ||
> > > !warn_format_int_precision) && (TREE_CODE (cur_type) == TREE_CODE

This makes the option apply to all types, not just integer types.  Thus, 
it means a test such as

void f (void) { __builtin_printf ("%f", 0.0f64); }

is not diagnosed with -Wformat -Wno-format-int-precision.  Given the 
option name, I don't think it should affect diagnosing that test (and 
there should be such a test added to the testsuite to verify that it 
doesn't affect diagnostics for non-integer types).
diff mbox series

Patch

diff --git a/gcc/c-family/c-format.c b/gcc/c-family/c-format.c
index e735e092043..c66787f931f 100644
--- a/gcc/c-family/c-format.c
+++ b/gcc/c-family/c-format.c
@@ -4248,7 +4248,7 @@  check_format_types (const substring_loc &fmt_loc,
 	  && (!pedantic || i < 2)
 	  && char_type_flag)
 	continue;
-      if (types->scalar_identity_flag
+      if ((types->scalar_identity_flag || !warn_format_int_precision)
 	  && (TREE_CODE (cur_type) == TREE_CODE (wanted_type)
 	      || (INTEGRAL_TYPE_P (cur_type)
 		  && INTEGRAL_TYPE_P (wanted_type)))
diff --git a/gcc/c-family/c.opt b/gcc/c-family/c.opt
index 4b8a094b206..d7d952765c6 100644
--- a/gcc/c-family/c.opt
+++ b/gcc/c-family/c.opt
@@ -684,6 +684,12 @@  C ObjC C++ LTO ObjC++ Warning Alias(Wformat-overflow=, 1, 0) IntegerRange(0, 2)
 Warn about function calls with format strings that write past the end
 of the destination region.  Same as -Wformat-overflow=1.
 
+Wformat-int-precision
+C ObjC C++ ObjC++ Var(warn_format_int_precision) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=,warn_format >= 1, 0)
+Warn when passing an argument of an incompatible integer type to a 'd', 'i',
+'b', 'B', 'o', 'u', 'x', or 'X' conversion specifier even when it has the same
+precision as the expected type.
+
 Wformat-security
 C ObjC C++ ObjC++ Var(warn_format_security) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=, warn_format >= 2, 0)
 Warn about possible security problems with format functions.
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 3bddfbaae6a..94a7ad96c50 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -351,7 +351,7 @@  Objective-C and Objective-C++ Dialects}.
 -Werror  -Werror=*  -Wexpansion-to-defined  -Wfatal-errors @gol
 -Wfloat-conversion  -Wfloat-equal  -Wformat  -Wformat=2 @gol
 -Wno-format-contains-nul  -Wno-format-extra-args  @gol
--Wformat-nonliteral  -Wformat-overflow=@var{n} @gol
+-Wformat-nonliteral  -Wformat-overflow=@var{n} -Wformat-int-precision @gol
 -Wformat-security  -Wformat-signedness  -Wformat-truncation=@var{n} @gol
 -Wformat-y2k  -Wframe-address @gol
 -Wframe-larger-than=@var{byte-size}  -Wno-free-nonheap-object @gol
@@ -6122,6 +6122,21 @@  If @option{-Wformat} is specified, also warn if the format string is not a
 string literal and so cannot be checked, unless the format function
 takes its format arguments as a @code{va_list}.
 
+@item -Wformat-int-precision
+@opindex Wformat-int-precision
+@opindex Wno-format-int-precision
+Warn when passing an argument of an incompatible integer type to
+a @samp{d}, @samp{i}, @samp{b}, @samp{B}, @samp{o}, @samp{u}, @samp{x},
+or @samp{X} conversion specifier even when it has the same precision as
+the expected type.  For example, on targets where @code{int64_t} is a typedef
+for @code{long}, the warning is issued for the @code{printf} call below even
+when both @code{long} and @code{long long} have the same size and precision.
+
+@smallexample
+  extern int64_t n;
+  printf ("%lli", n);
+@end smallexample
+
 @item -Wformat-security
 @opindex Wformat-security
 @opindex Wno-format-security
diff --git a/gcc/testsuite/c-c++-common/Wformat-int-precision-1.c b/gcc/testsuite/c-c++-common/Wformat-int-precision-1.c
new file mode 100644
index 00000000000..a06e047c933
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/Wformat-int-precision-1.c
@@ -0,0 +1,7 @@ 
+/* { dg-do compile { target { ! long_neq_int } } } */
+/* { dg-options "-Wformat" } */
+
+void test ()
+{
+  __builtin_printf ("%d\n", (long) 1); /* { dg-warning "expects argument of type" } */
+}
diff --git a/gcc/testsuite/c-c++-common/Wformat-int-precision-2.c b/gcc/testsuite/c-c++-common/Wformat-int-precision-2.c
new file mode 100644
index 00000000000..e9b41b4f42e
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/Wformat-int-precision-2.c
@@ -0,0 +1,8 @@ 
+/* { dg-do compile { target { ! long_neq_int } } } */
+/* { dg-options "-Wformat -Wno-format-int-precision" } */
+
+void test ()
+{
+  __builtin_printf ("%d\n", (long) 1); /* { dg-bogus "expects argument of type" } */
+  __builtin_printf ("%d\n", (long long) 1); /* { dg-warning "expects argument of type" "" { target int32 } } */
+}