simd_op_check produces the files which do not look essential

[stevesuzuki-arm]

        std::map<OutputFileType, std::string> outputs = {
            {OutputFileType::c_header, file_name + ext.at(OutputFileType::c_header).extension},
            {OutputFileType::object, file_name + ext.at(OutputFileType::object).extension},
            {OutputFileType::assembly, file_name + ".s"},
            {OutputFileType::llvm_assembly, file_name + ".ll"},
        };
        error.compile_to(outputs, arg_types, fn_name, target);

It seems only assembly is used in testing.
I'm wondering what other files are useful for? I occasionally look at llvm_assembly for debug though.
Could we save test run time in CI by producing only asm file?

[abadams]

Good question - I think it could probably be cut down.