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By optimizing vector movement to broadcast in ix86_expand_vector_move during pass_expand, pass_reload/LRA can automatically generate an avx512 embedded broadcast, pass_cpb is not needed. Considering that in the absence of avx512f, broadcast from memory is still slightly faster than loading the entire memory, so always enable broadcast. benchmark: https://gitlab.com/x86-benchmarks/microbenchmark/-/tree/vaddps/broadcast The performance diff strategy : cycles memory : 1046611188 memory : 1255420817 memory : 1044720793 memory : 1253414145 average : 1097868397 broadcast : 1044430688 broadcast : 1044477630 broadcast : 1253554603 broadcast : 1044561934 average : 1096756213 But however broadcast has larger size. the size diff size broadcast.o text data bss dec hex filename 137 0 0 137 89 broadcast.o size memory.o text data bss dec hex filename 115 0 0 115 73 memory.o gcc/ChangeLog: * config/i386/i386-expand.c (ix86_broadcast_from_integer_constant): Rename to .. (ix86_broadcast_from_constant): .. this, and extend it to handle float mode. (ix86_expand_vector_move): Extend to float mode. * config/i386/i386-features.c (replace_constant_pool_with_broadcast): Remove. (remove_partial_avx_dependency_gate): Ditto. (constant_pool_broadcast): Ditto. (class pass_constant_pool_broadcast): Ditto. (make_pass_constant_pool_broadcast): Ditto. (remove_partial_avx_dependency): Adjust gate. * config/i386/i386-passes.def: Remove pass_constant_pool_broadcast. * config/i386/i386-protos.h (make_pass_constant_pool_broadcast): Remove. gcc/testsuite/ChangeLog: * gcc.target/i386/fuse-caller-save-xmm.c: Adjust testcase. |
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| c++tools | ||
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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.