3877c56065
This patch makes CONST_VECTOR use the same encoding as VECTOR_CST. One problem that occurs in RTL but not at the tree level is that a fair amount of code uses XVEC and XVECEXP directly on CONST_VECTORs (which is valid, just with looser checking). This is complicated by the fact that vectors are also represented as PARALLELs in some target interfaces, so using XVECEXP is a good polymorphic way of handling both forms. Rather than try to untangle all that, the best approach seemed to be to continue to encode every element in a fixed-length vector. That way only target-independent and AArch64 code need to be precise about using CONST_VECTOR_ELT over XVECEXP. After this change is no longer valid to modify CONST_VECTORs in-place. This needed some fix-up in the powerpc backends. 2018-01-02 Richard Sandiford <richard.sandiford@linaro.org> gcc/ * doc/rtl.texi (const_vector): Describe new encoding scheme. * Makefile.in (OBJS): Add rtx-vector-builder.o. * rtx-vector-builder.h: New file. * rtx-vector-builder.c: Likewise. * rtl.h (rtx_def::u2): Add a const_vector field. (CONST_VECTOR_NPATTERNS): New macro. (CONST_VECTOR_NELTS_PER_PATTERN): Likewise. (CONST_VECTOR_DUPLICATE_P): Likewise. (CONST_VECTOR_STEPPED_P): Likewise. (CONST_VECTOR_ENCODED_ELT): Likewise. (const_vec_duplicate_p): Check for a duplicated vector encoding. (unwrap_const_vec_duplicate): Likewise. (const_vec_series_p): Check for a non-duplicated vector encoding. Say that the function only returns true for integer vectors. * emit-rtl.c: Include rtx-vector-builder.h. (gen_const_vec_duplicate_1): Delete. (gen_const_vector): Call gen_const_vec_duplicate instead of gen_const_vec_duplicate_1. (const_vec_series_p_1): Operate directly on the CONST_VECTOR encoding. (gen_const_vec_duplicate): Use rtx_vector_builder. (gen_const_vec_series): Likewise. (gen_rtx_CONST_VECTOR): Likewise. * config/powerpcspe/powerpcspe.c: Include rtx-vector-builder.h. (swap_const_vector_halves): Take an rtx pointer rather than rtx. Build a new vector rather than modifying a CONST_VECTOR in-place. (handle_special_swappables): Update call accordingly. * config/rs6000/rs6000-p8swap.c: Include rtx-vector-builder.h. (swap_const_vector_halves): Take an rtx pointer rather than rtx. Build a new vector rather than modifying a CONST_VECTOR in-place. (handle_special_swappables): Update call accordingly. From-SVN: r256102 |
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| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| INSTALL | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgo | ||
| libgomp | ||
| libhsail-rt | ||
| libiberty | ||
| libitm | ||
| libmpx | ||
| libobjc | ||
| liboffloadmic | ||
| libquadmath | ||
| libsanitizer | ||
| libssp | ||
| libstdc++-v3 | ||
| libvtv | ||
| lto-plugin | ||
| maintainer-scripts | ||
| zlib | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| ABOUT-NLS | ||
| ChangeLog | ||
| ChangeLog.jit | ||
| ChangeLog.tree-ssa | ||
| compile | ||
| config-ml.in | ||
| config.guess | ||
| config.rpath | ||
| config.sub | ||
| configure | ||
| configure.ac | ||
| COPYING | ||
| COPYING3 | ||
| COPYING3.LIB | ||
| COPYING.LIB | ||
| COPYING.RUNTIME | ||
| depcomp | ||
| install-sh | ||
| libtool-ldflags | ||
| libtool.m4 | ||
| lt~obsolete.m4 | ||
| ltgcc.m4 | ||
| ltmain.sh | ||
| ltoptions.m4 | ||
| ltsugar.m4 | ||
| ltversion.m4 | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| missing | ||
| mkdep | ||
| mkinstalldirs | ||
| move-if-change | ||
| README | ||
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| 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.