[SYCL][AOT] Enhance opencl-aot to compile or link program (#3104)

This patch implements 3 invocation types:

    opencl-aot -device= -cmd=link -spv=<spirv_input>
    -ir=<output_aocx>
    This compiles a SPIR-V program to an aocx (i.e. the standard ELF file
    from opencl_rt compiles)

    opencl-aot -device= -cmd=link
    -binary=<comma_separated_list_of_binary_filename>
    -ir=<output_aocx>
    This links LLVM IR and object files to generate an aocx

    opencl-aot -device= -cmd=compile -input=<opencl_input_file>
    -ir=<output_aocx>
    This compiles OpenCL source to an aocx

Author: linkren

opencl-aot/include/utils.h

@@ -28,7 +28,7 @@ enum Errors : int8_t {
   OPENCL_AOT_FAILED_TO_CREATE_OPENCL_PROGRAM,
   OPENCL_AOT_FAILED_TO_CREATE_ELF,
   OPENCL_AOT_DEVICE_INFO_PARAMETER_IS_EMPTY,
-  OPENCL_AOT_LIST_OF_INPUT_BINARIES_IS_EMPTY,
+  OPENCL_AOT_LIST_OF_INPUT_FILES_IS_EMPTY,
   OPENCL_AOT_FAILED_TO_OPEN_FILE,
   OPENCL_AOT_FILE_IS_EMPTY,
   OPENCL_AOT_DEVICE_DOESNT_SUPPORT_SPIRV,
@@ -93,8 +93,12 @@ createProgramWithIL(std::vector<char> IL, cl_context Context,
 std::tuple<std::vector<char>, std::string, cl_int>
 readBinaryFile(std::string FileName);
 
+bool isFileOCLSource(const std::string &FileName);
+
 bool isFileELF(const std::vector<char> &BinaryData);
 
 bool isFileSPIRV(const std::vector<char> &BinaryData);
 
-#endif /* AOT_COMP_TOOL_UTILS */
+bool isFileLLVMIR(const std::vector<char> &BinaryData);
+
+#endif /* AOT_COMP_TOOL_UTILS */