0d57370c9c
This reduces the size and alignment of all three comparison category types to a single byte. The partial_ordering::_M_is_ordered flag is replaced by the value 0x02 in the _M_value member. This also optimizes conversion and comparison operators to avoid conditional branches where possible, by comparing _M_value to constants or using bitwise operations to correctly handle the unordered state. * libsupc++/compare (__cmp_cat::type): Define typedef for underlying type of enumerations and comparison category types. (__cmp_cat::_Ord, __cmp_cat::_Ncmp): Add underlying type. (__cmp_cat::_Ncmp::unordered): Change value to 2. (partial_ordering::_M_value, weak_ordering::_M_value) (strong_ordering::_M_value): Change type to __cmp_cat::type. (partial_ordering::_M_is_ordered): Remove data member. (partial_ordering): Use second bit of _M_value for unordered. Adjust comparison operators. (weak_ordering::operator partial_ordering): Simplify to remove branches. (operator<=>(unspecified, weak_ordering)): Likewise. (strong_ordering::operator partial_ordering): Likewise. (strong_ordering::operator weak_ordering): Likewise. (operator<=>(unspecified, strong_ordering)): Likewise. * testsuite/18_support/comparisons/categories/partialord.cc: New test. * testsuite/18_support/comparisons/categories/strongord.cc: New test. * testsuite/18_support/comparisons/categories/weakord.cc: New test. |
||
|---|---|---|
| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| INSTALL | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgo | ||
| libgomp | ||
| libhsail-rt | ||
| libiberty | ||
| libitm | ||
| libobjc | ||
| liboffloadmic | ||
| libphobos | ||
| libquadmath | ||
| libsanitizer | ||
| libssp | ||
| libstdc++-v3 | ||
| libvtv | ||
| lto-plugin | ||
| maintainer-scripts | ||
| zlib | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| ABOUT-NLS | ||
| ar-lib | ||
| ChangeLog | ||
| ChangeLog.jit | ||
| ChangeLog.tree-ssa | ||
| compile | ||
| config-ml.in | ||
| config.guess | ||
| config.rpath | ||
| config.sub | ||
| configure | ||
| configure.ac | ||
| COPYING | ||
| COPYING3 | ||
| COPYING3.LIB | ||
| COPYING.LIB | ||
| COPYING.RUNTIME | ||
| depcomp | ||
| install-sh | ||
| libtool-ldflags | ||
| libtool.m4 | ||
| lt~obsolete.m4 | ||
| ltgcc.m4 | ||
| ltmain.sh | ||
| ltoptions.m4 | ||
| ltsugar.m4 | ||
| ltversion.m4 | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| 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 individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.