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This is a quick refactor of the riscv target processing code to take a string_slice rather than a decl. The reason for this is to enable it to work with target_clones where merging logic requires reasoning about each version string individually in the front end. This refactor primarily serves just to get this working. Ideally the logic here would be further refactored as currently there is no way to check if a parse fails or not without emitting an error. This makes things difficult for later patches which intends to emit a warning and ignoring unrecognised/not parsed target_clone values rather than erroring which can't currently be achieved with the current riscv code. gcc/ChangeLog: * config/riscv/riscv-protos.h (riscv_process_target_version_str): New function.. * config/riscv/riscv-target-attr.cc (riscv_process_target_attr): Refactor to take string_slice. (riscv_process_target_version_str): New function. * config/riscv/riscv.cc (parse_features_for_version): Refactor to take string_slice. (riscv_compare_version_priority): Ditto. (dispatch_function_versions): Change to pass location.
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