f436562730
* config.gcc: Revamp target_cpu_default2 to strings; support new x86 variants. * i386.c (override_options): Default x86_cpu_string and x86_arch_string properly; set prefetch_sse. * i386.h (x86_prefetch_sse): Declare. (TARGET_PREFETCH_SSE): New. (CPP_CPU_DEFAULT_SPEC): Define according to the new macros. (TARGET_CPU_DEFAULT_*): New. * config/i386/i386.h (struct processor_costs): Add new members prefetch_block and simultaneous_prefetches. (PREFETCH_BLOCK, SIMULTANEOUS_PREFETCHES): New. * config/i386/i386.c (processor_costs structs): Add values for prefetch_block and simultaneous_prefetches. * config/i386/i386.md (unspec values): Remove values for prefetch operations, which now use the PREFETCH rtx code. (prefetch_sse, prefetch_3dnow, prefetchw): Combine to use new unified prefetch support. From-SVN: r48006
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