7c679969ba
Currently each element in a gather load is costed as a scalar_load and each element in a scatter store is costed as a scalar_store. The load side seems to work pretty well in practice, since many CPU-specific costs give loads quite a high cost relative to arithmetic operations. However, stores usually have a cost of just 1, which means that scatters tend to appear too cheap. This patch adds a separate cost for one element in a scatter store. Like with the previous patches, this one only becomes active if a CPU selects use_new_vector_costs. It should therefore have a very low impact on other CPUs. gcc/ * config/aarch64/aarch64-protos.h (sve_vec_cost::scatter_store_elt_cost): New member variable. * config/aarch64/aarch64.c (generic_sve_vector_cost): Update accordingly, taking the cost from the cost of a scalar_store. (a64fx_sve_vector_cost): Likewise. (aarch64_detect_vector_stmt_subtype): Detect scatter stores. |
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| c++tools | ||
| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
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| INSTALL | ||
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| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgo | ||
| libgomp | ||
| libhsail-rt | ||
| libiberty | ||
| libitm | ||
| libobjc | ||
| liboffloadmic | ||
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| libsanitizer | ||
| libssp | ||
| libstdc++-v3 | ||
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| lto-plugin | ||
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| zlib | ||
| .dir-locals.el | ||
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| ABOUT-NLS | ||
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| COPYING3.LIB | ||
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| libtool-ldflags | ||
| libtool.m4 | ||
| lt~obsolete.m4 | ||
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| ltsugar.m4 | ||
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