1bcb4c4faa
One effect of https://gcc.gnu.org/ml/gcc-patches/2019-09/msg00802.html was to strengthen the sanity check in lra_assigns so that it checks whether reg_renumber is consistent with the whole conflict set. This duly tripped on csky for a pseudo that had been allocated to the eliminated frame pointer. (csky doesn't have a separate hard frame pointer.) lra-lives uses: /* Set of hard regs (except eliminable ones) currently live. */ static HARD_REG_SET hard_regs_live; to track the set of live directly-referenced hard registers, and it correctly implements the exclusion when setting up the initial set: hard_regs_live &= ~eliminable_regset; But later calls to make_hard_regno_live and make_hard_regno_dead would process eliminable registers like other registers, recording conflicts for them and potentially making them live. (Note that after r266086, make_hard_regno_dead adds conflicts for registers that are already marked dead.) I think this would have had the effect of pessimising targets without a separate hard frame pointer. 2019-10-02 Richard Sandiford <richard.sandiford@arm.com> gcc/ PR middle-end/91957 * lra-lives.c (make_hard_regno_dead): Don't record conflicts for eliminable registers. (make_hard_regno_live): Likewise, and don't make them live. From-SVN: r276440 |
||
|---|---|---|
| INSTALL | ||
| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| 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 | ||
| COPYING | ||
| COPYING.LIB | ||
| COPYING.RUNTIME | ||
| COPYING3 | ||
| COPYING3.LIB | ||
| ChangeLog | ||
| ChangeLog.jit | ||
| ChangeLog.tree-ssa | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| README | ||
| ar-lib | ||
| 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 | ||
| multilib.am | ||
| symlink-tree | ||
| test-driver | ||
| 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.