[compiler-rt][AArch64] Provide basic implementations of SME memcpy/memmove in case of strictly aligned memory access #138250
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…mmove in case of strictly aligned memory access The existing implementations, written in assembly, make use of unaligned accesses for performance reasons. They are not compatible with strict aligned configurations, i.e. with `-mno-unaligned-access`. If the functions are used in this scenario, an exception is raised due to unaligned memory accesses. This patch reintroduces vanilla implementations for these functions to be used in strictly aligned configurations. The actual code is largely based on the code from llvm#77496
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The existing implementations, written in assembly, make use of unaligned accesses for performance reasons. They are not compatible with strict aligned configurations, i.e. with
-mno-unaligned-access.If the functions are used in this scenario, an exception is raised due to unaligned memory accesses.
This patch reintroduces vanilla implementations for these functions to be used in strictly aligned configurations. The actual code is largely based on the code from #77496