GCC modified for the FreeChainXenon project
6f966f0614
This patch adds support for recognizing loops which mimic the behaviour of functions strlen and rawmemchr, and replaces those with internal function calls in case a target provides them. In contrast to the standard strlen and rawmemchr functions, this patch also supports different instances where the memory pointed to is interpreted as 8, 16, and 32-bit sized, respectively. gcc/ChangeLog: * builtins.c (get_memory_rtx): Change to external linkage. * builtins.h (get_memory_rtx): Add function prototype. * doc/md.texi (rawmemchr<mode>): Document. * internal-fn.c (expand_RAWMEMCHR): Define. * internal-fn.def (RAWMEMCHR): Add. * optabs.def (rawmemchr_optab): Add. * tree-loop-distribution.c (find_single_drs): Change return code behaviour by also returning true if no single store was found but a single load. (loop_distribution::classify_partition): Respect the new return code behaviour of function find_single_drs. (loop_distribution::execute): Call new function transform_reduction_loop in order to replace rawmemchr or strlen like loops by calls into builtins. (generate_reduction_builtin_1): New function. (generate_rawmemchr_builtin): New function. (generate_strlen_builtin_1): New function. (generate_strlen_builtin): New function. (generate_strlen_builtin_using_rawmemchr): New function. (reduction_var_overflows_first): New function. (determine_reduction_stmt_1): New function. (determine_reduction_stmt): New function. (loop_distribution::transform_reduction_loop): New function. gcc/testsuite/ChangeLog: * gcc.dg/tree-ssa/ldist-rawmemchr-1.c: New test. * gcc.dg/tree-ssa/ldist-rawmemchr-2.c: New test. * gcc.dg/tree-ssa/ldist-strlen-1.c: New test. * gcc.dg/tree-ssa/ldist-strlen-2.c: New test. * gcc.dg/tree-ssa/ldist-strlen-3.c: New test. |
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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 | ||
| libgo | ||
| libgomp | ||
| 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 | ||
| 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 | ||
| 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.