b7b3378f91
As mentioned in the PR, the CLOBBERs in vzeroupper are added there even for registers that aren't ever live in the function before and break the prologue/epilogue expansion with ms ABI (normal ABIs are fine, as they consider all [xyz]mm registers call clobbered, but the ms ABI considers xmm0-15 call used but the bits above low 128 ones call clobbered). The following patch fixes it by not adding the clobbers during vzeroupper pass (before pro_and_epilogue), but adding them for -fipa-ra purposes only during the final output. Perhaps we could add some CLOBBERs early (say for df_regs_ever_live_p regs that aren't live in the live_regs bitmap, or depending on the ABI either add all of them immediately, or for ms ABI add CLOBBERs for xmm0-xmm5 if they don't have a SET) and add the rest later. And the addition could be perhaps done at other spots, e.g. in an epilogue_completed guarded splitter. 2020-02-05 Jakub Jelinek <jakub@redhat.com> PR target/92190 * config/i386/i386-features.c (ix86_add_reg_usage_to_vzeroupper): Only include sets and not clobbers in the vzeroupper pattern. * config/i386/sse.md (*avx_vzeroupper): Require in insn condition that the parallel has 17 (64-bit) or 9 (32-bit) elts. (*avx_vzeroupper_1): New define_insn_and_split. * gcc.target/i386/pr92190.c: 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 | ||
| 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.