GCC modified for the FreeChainXenon project
86dce005a1
GCC 14 adds the header file arm_neon_sve_bridge.h to help interface SVE and Advanced SIMD code. One of the defined idioms is: svset_neonq (svundef_TYPE (), advsimd_vector) which simply reinterprets advsimd_vector as an SVE vector without regard for what's in the upper bits. GCC was failing to recognise this idiom, which was likely to significantly hamper adoption. There is (AFAIK) no good way of representing an extension with undefined bits in gimple. We could add an internal-only builtin to represent it, but the current framework makes that somewhat awkward. It also doesn't seem very forward-looking. This patch instead goes for the simpler approach of recognising undefined arguments at expansion time. gcc/ PR target/114577 * config/aarch64/aarch64-sve-builtins.h (aarch64_sve::lookup_fndecl): Declare. * config/aarch64/aarch64-sve-builtins.cc (aarch64_sve::lookup_fndecl): New function. * config/aarch64/aarch64-sve-builtins-base.cc (is_undef): Likewise. (svset_neonq_impl::expand): Optimise expansions whose first argument is undefined. gcc/testsuite/ PR target/114577 * gcc.target/aarch64/sve/acle/general/pr114577_1.c: New test. * gcc.target/aarch64/sve/acle/general/pr114577_2.c: Likewise. |
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| c++tools | ||
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| fixincludes | ||
| gcc | ||
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| .dir-locals.el | ||
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| libtool.m4 | ||
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| ltversion.m4 | ||
| lt~obsolete.m4 | ||
| MAINTAINERS | ||
| Makefile.def | ||
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