24e30f485b
I really don't know what to do here. This is a bit of whack-o-mole. The IL is sufficiently different for various architectures that any tweak can cause the number of jump threads to vary. For the pr7745-2.c testcase, we have less threading candidates because 2 of them now cross loop boundaries. Interestingly, this test matches "Jumps threaded", not threads registered, so the block copier can drop threads at copying time adding further confusion. For example, we can register N threads, but the old copier can cancel N-M threads while updating the CFG for a variety of different reasons (removed edges, threading through loop exits, etc). This makes the "Registering jump threads" not to match the total number of threads this test checks for with "Jumps threaded". The pr66752-3.c test OTOH, is just a matter of thread4 eliminating the "if". I had erroneously thought it would always be eliminated by thread3, but we really don't care where it gets cleaned up. All we know is that DCE can't depend on the early threaders doing this work, because it may cross loop boundaries. I've chosen thread4 arbitrarily, but we could just as easily pick the ".optimized" dump. Sorry, I'm really at my wits end here. I don't see any clean path forward, except rewrite these tests as gimple IL. They're close to useless as they sit. gcc/testsuite/ChangeLog: PR testsuite/102501 * gcc.dg/tree-ssa/pr66752-3.c: Adjust. * gcc.dg/tree-ssa/pr77445-2.c: Adjust. |
||
|---|---|---|
| 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.