daa9715842
This patch fixes an ICE that would happen when extract_low_bits is called with modes for which you can't extract a valid subreg. e.g. taking a 32 bytes subreg from a 48 byte mode. The ICE happens because convert_modes which eventually calls simplify_gen_subreg does not expect the convertion to fail. The assert in gen_lowpart_general would then be hit. The patch changes it to validate the subreg before trying to convert the modes. If the subreg is not possible we return NULL_RTX and bail out early. gcc/ChangeLog: 2018-08-21 Tamar Christina <tamar.christina@arm.com> * expmed.c (extract_low_bits): Reject invalid subregs early. gcc/testsuite/ChangeLog: 2018-08-21 Tamar Christina <tamar.christina@arm.com> * gcc.target/aarch64/large_struct_copy.c: New test. From-SVN: r263696 |
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| contrib | ||
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| gcc | ||
| gnattools | ||
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| include | ||
| INSTALL | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
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| libdecnumber | ||
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| libiberty | ||
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| libquadmath | ||
| libsanitizer | ||
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| ChangeLog | ||
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| compile | ||
| config-ml.in | ||
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| configure | ||
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| COPYING | ||
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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.