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Joseph Myers 0b8693fc87 c: Update nullptr_t comparison checks
WG14 has agreed to allow equality comparisons between pointers and
nullptr_t values that are not null pointer constants (this was
previously an exceptional case where such nullptr_t values were
handled differently from null pointer constants; other places in the
standard allowed nullptr_t values, whether or not those values are
null pointer constants, in the same contexts as null pointer
constants); see the wording at the end of N3077.  Update GCC's
implementation to match this change.

There are also changes to allow null pointer constants of integer or
pointer type to be converted to nullptr_t (by assignment, cast or
conversion as if by assignment), which I'll deal with separately.

Bootstrapped with no regressions for x86_64-pc-linux-gnu.

gcc/c/
	* c-typeck.cc (build_binary_op): Allow comparisons between
	pointers and nullptr_t values that are not null pointer constants.

gcc/testsuite/
	* gcc.dg/c2x-constexpr-3.c: Do not expect comparison of nullptr_t
	and pointer to be disallowed.
	* gcc.dg/c2x-nullptr-1.c: Test comparisons of nullptr_t and
	pointers are allowed.
	* gcc.dg/c2x-nullptr-3.c: Do not test that comparisons of
	nullptr_t and pointers are disallowed.
2023-02-02 23:29:45 +00:00
c++tools Daily bump. 2023-01-10 00:18:07 +00:00
config Daily bump. 2022-11-15 08:32:29 +00:00
contrib Daily bump. 2023-01-20 00:17:40 +00:00
fixincludes Daily bump. 2023-01-22 00:17:27 +00:00
gcc c: Update nullptr_t comparison checks 2023-02-02 23:29:45 +00:00
gnattools Daily bump. 2022-09-01 00:17:39 +00:00
gotools Daily bump. 2022-08-31 00:16:45 +00:00
include amdgcn, libgomp: Manually allocated stacks 2023-02-02 11:47:03 +00:00
INSTALL
intl Daily bump. 2022-11-24 00:17:47 +00:00
libada Update copyright years. 2023-01-16 11:52:17 +01:00
libatomic Daily bump. 2023-01-17 00:18:06 +00:00
libbacktrace Daily bump. 2023-01-21 00:16:20 +00:00
libcc1 Update copyright years. 2023-01-16 11:52:17 +01:00
libcody Update Copyright year in ChangeLog files 2023-01-02 09:23:36 +01:00
libcpp Daily bump. 2023-01-17 00:18:06 +00:00
libdecnumber Update copyright years. 2023-01-16 11:52:17 +01:00
libffi Daily bump. 2023-01-23 00:16:34 +00:00
libgcc Daily bump. 2023-01-31 00:18:44 +00:00
libgfortran Daily bump. 2023-01-19 00:17:35 +00:00
libgm2 Daily bump. 2023-02-02 00:17:43 +00:00
libgo Always define WIN32_LEAN_AND_MEAN before <windows.h> 2023-01-07 06:51:06 +00:00
libgomp amdgcn, libgomp: Manually allocated stacks 2023-02-02 11:47:03 +00:00
libiberty Update copyright years. 2023-01-16 11:52:17 +01:00
libitm Update copyright years. 2023-01-16 11:52:17 +01:00
libobjc Update copyright years. 2023-01-16 11:52:17 +01:00
libphobos Daily bump. 2023-01-18 00:17:21 +00:00
libquadmath Daily bump. 2023-01-03 00:17:09 +00:00
libsanitizer Daily bump. 2023-02-01 00:18:50 +00:00
libssp Update copyright years. 2023-01-16 11:52:17 +01:00
libstdc++-v3 libstdc++: Tweak link to ABIcheck project 2023-02-02 22:55:17 +01:00
libvtv Update copyright years. 2023-01-16 11:52:17 +01:00
lto-plugin Update copyright years. 2023-01-16 11:52:17 +01:00
maintainer-scripts Daily bump. 2022-12-01 00:17:51 +00:00
zlib Daily bump. 2022-11-24 00:17:47 +00:00
.dir-locals.el dir-locals: Use https for bug references 2021-07-20 11:40:34 +01:00
.gitattributes
.gitignore .gitignore: do not ignore config.h 2022-07-19 17:07:04 +03:00
ABOUT-NLS
ar-lib
ChangeLog Daily bump. 2023-01-11 00:17:56 +00:00
ChangeLog.jit
ChangeLog.tree-ssa
compile
config-ml.in
config.guess
config.rpath
config.sub config.sub: change mode to 755. 2021-12-21 09:10:57 +01:00
configure configure: remove dependencies on gmp and mpfr when gdb is disabled 2023-01-06 09:36:52 +01:00
configure.ac configure: remove dependencies on gmp and mpfr when gdb is disabled 2023-01-06 09:36:52 +01:00
COPYING
COPYING.LIB
COPYING.RUNTIME
COPYING3
COPYING3.LIB
depcomp
install-sh
libtool-ldflags
libtool.m4 Generic configury support for shared libs on VxWorks 2022-10-11 07:31:07 +00:00
ltgcc.m4
ltmain.sh
ltoptions.m4
ltsugar.m4
ltversion.m4
lt~obsolete.m4
MAINTAINERS MAINTAINERS: Add myself as Rust front-end maintainer 2023-01-10 22:06:09 +00:00
Makefile.def configure: Do not build the ununsed libffi shared library. 2022-12-31 17:51:47 +00:00
Makefile.in configure: Do not build the ununsed libffi shared library. 2022-12-31 17:51:47 +00:00
Makefile.tpl Merge modula-2 front end onto gcc. 2022-12-14 17:43:08 +00:00
missing
mkdep
mkinstalldirs
move-if-change
multilib.am
README
symlink-tree
test-driver
ylwrap

This directory contains the GNU Compiler Collection (GCC).

The GNU Compiler Collection is free software.  See the files whose
names start with COPYING for copying permission.  The manuals, and
some of the runtime libraries, are under different terms; see the
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The directory INSTALL contains copies of the installation information
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See the file gcc/doc/gcc.texi (together with other files that it
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