GCC modified for the FreeChainXenon project
5b68fb47bd
__builtin_tgmath implements <tgmath.h> semantics for integer generic arguments that handle cases involving _FloatN / _FloatNx types as specified in TS 18661-3 plus some defect fixes. C2x has further changes to the semantics for <tgmath.h> macros with such types, which should also be considered defect fixes (although handled through the integration of TS 18661-3 in C2x rather than through an issue tracking process). Specifically, the rules were changed because of problems raised with using the macros with the evaluation format types such as float_t and _Float32_t: the older version of the rules didn't allow passing _FloatN / _FloatNx types to the narrowing macros returning float or double, or passing float / double / long double to the narrowing macros returning _FloatN / _FloatNx, which was a problem with the evaluation format types which could be either kind of type depending on the value of FLT_EVAL_METHOD. Thus the new rules allow cases of mixing types which were not allowed before - which is not itself a problem for __builtin_tgmath - and, as part of the changes, the handling of integer arguments was also changed: if there is any _FloatNx generic argument, integer generic arguments are treated as _Float32x (not double), while the rule about treating integer arguments to narrowing macros returning _FloatN or _FloatNx as _Float64 not double was removed (no longer needed now double is a valid argument to such macros). Implement the changes for __builtin_tgmath. (The changes also added a rule that if any argument is _DecimalNx, integer arguments are treated as _Decimal64x, but GCC doesn't support _DecimalNx types so nothing is done about that.) I have a corresponding glibc patch to update glibc test expectations for C2x and also ensure that appropriate semantics are followed when GCC 7 through 12 are used with <tgmath.h> (avoiding __builtin_tgmath in cases where it doesn't match the C2x semantics). Bootstrapped with no regressions for x86_64-pc-linux-gnu. gcc/ * doc/extend.texi (__builtin_tgmath): Do not restate standard rule for handling real integer types. gcc/c/ * c-parser.cc (c_parser_postfix_expression): Handle integer generic arguments to functions passed to __builtin_tgmath as _Float32x if any argument has _FloatNx or _Complex _FloatNx type. Do not handle integer arguments to some narrowing functions as _Float64. gcc/testsuite/ * gcc.dg/builtin-tgmath-3.c: Update expectations and add more tests. |
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| c++tools | ||
| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| INSTALL | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| libcody | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgm2 | ||
| libgo | ||
| libgomp | ||
| libiberty | ||
| libitm | ||
| libobjc | ||
| 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 | ||
| COPYING.LIB | ||
| COPYING.RUNTIME | ||
| COPYING3 | ||
| COPYING3.LIB | ||
| depcomp | ||
| install-sh | ||
| libtool-ldflags | ||
| libtool.m4 | ||
| ltgcc.m4 | ||
| ltmain.sh | ||
| ltoptions.m4 | ||
| ltsugar.m4 | ||
| ltversion.m4 | ||
| lt~obsolete.m4 | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| missing | ||
| mkdep | ||
| mkinstalldirs | ||
| move-if-change | ||
| multilib.am | ||
| README | ||
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| 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.