3e6ab5cefa
The issue is that relax_delay_slots can streamline the CFG in some cases, in particular remove BARRIERs, but removing BARRIERs changes the way the instructions are associated with (basic) blocks by the liveness analysis code in resource.c (find_basic_block) and thus can cause entries in the cache maintained by resource.c to become outdated, thus producing wrong answers downstream. The fix is to invalidate the cache entries affected by the removal of BARRIERs in relax_delay_slots, i.e. for the instructions down to the next BARRIER. PR rtl-optimization/94119 * resource.h (clear_hashed_info_until_next_barrier): Declare. * resource.c (clear_hashed_info_until_next_barrier): New function. * reorg.c (add_to_delay_list): Fix formatting. (relax_delay_slots): Call clear_hashed_info_until_next_barrier on the next instruction after removing a BARRIER. |
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| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| INSTALL | ||
| intl | ||
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| libgcc | ||
| libgfortran | ||
| libgo | ||
| libgomp | ||
| libhsail-rt | ||
| libiberty | ||
| libitm | ||
| libobjc | ||
| liboffloadmic | ||
| libphobos | ||
| libquadmath | ||
| libsanitizer | ||
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| libstdc++-v3 | ||
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| lto-plugin | ||
| maintainer-scripts | ||
| zlib | ||
| .dir-locals.el | ||
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| .gitignore | ||
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| COPYING3 | ||
| COPYING3.LIB | ||
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| depcomp | ||
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| libtool-ldflags | ||
| libtool.m4 | ||
| lt~obsolete.m4 | ||
| ltgcc.m4 | ||
| ltmain.sh | ||
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| ltsugar.m4 | ||
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| MAINTAINERS | ||
| Makefile.def | ||
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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.