mirror of git://gcc.gnu.org/git/gcc.git
080dc24383
Add flag -fassume-phsa that is on by default. If -fno-assume-phsa is given, these optimizations are disabled. With this flag, gccbrig can generate GENERIC that assumes we are targeting a phsa-runtime based implementation, which allows us to expose the work-item context accesses to retrieve WI IDs etc. which helps optimizers. First optimization that takes advantage of this is to get rid of the setworkitemid calls whenever we have non-inlined calls that use IDs internally. Other optimizations added in this commit: - expand absoluteid to similar level of simplicity as workitemid. At the moment absoluteid is the best indexing ID to end up with WG vectorization. - propagate ID variables closer to their uses. This is mainly to avoid known useless casts, which confuse at least scalar evolution analysis. - use signed long long for storing IDs. Unsigned integers have defined wraparound semantics, which confuse at least scalar evolution analysis, leading to unvectorizable WI loops. - also refactor some BRIG function generation helpers to brig_function. - no point in having the wi-loop as a for-loop. It's really a do...while and SCEV can analyze it just fine still. - add consts to ptrs etc. in BRIG builtin defs. Improves optimization opportunities. - add qualifiers to generated function parameters. Const and restrict on the hidden local/private pointers, the arg buffer and the context pointer help some optimizations. From-SVN: r259957 |
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| INSTALL | ||
| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgo | ||
| libgomp | ||
| libhsail-rt | ||
| libiberty | ||
| libitm | ||
| libmpx | ||
| libobjc | ||
| liboffloadmic | ||
| libquadmath | ||
| libsanitizer | ||
| libssp | ||
| libstdc++-v3 | ||
| libvtv | ||
| lto-plugin | ||
| maintainer-scripts | ||
| zlib | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| ABOUT-NLS | ||
| COPYING | ||
| COPYING.LIB | ||
| COPYING.RUNTIME | ||
| COPYING3 | ||
| COPYING3.LIB | ||
| ChangeLog | ||
| ChangeLog.jit | ||
| ChangeLog.tree-ssa | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| README | ||
| compile | ||
| config-ml.in | ||
| config.guess | ||
| config.rpath | ||
| config.sub | ||
| configure | ||
| configure.ac | ||
| depcomp | ||
| install-sh | ||
| libtool-ldflags | ||
| libtool.m4 | ||
| ltgcc.m4 | ||
| ltmain.sh | ||
| ltoptions.m4 | ||
| ltsugar.m4 | ||
| ltversion.m4 | ||
| lt~obsolete.m4 | ||
| missing | ||
| mkdep | ||
| mkinstalldirs | ||
| move-if-change | ||
| symlink-tree | ||
| ylwrap | ||
README
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.