[Autobackout][FuncReg]Revert of change: 82f8c79

 Make -cmc option unknown for SPIRV path

Report -cmc option as unknown in preparation for complete removal of
deprecated compilation mode.

Author: aus-intel

IGC/VectorCompiler/lib/Driver/Driver.cpp

@@ -532,11 +532,19 @@ parseApiOptions(StringSaver &Saver, StringRef ApiOptions, bool IsStrictMode) {
     return parseOptions<ID, OPT_UNKNOWN, OPT_INPUT>(Argv, FlagsToInclude,
                                                     Options, IsStrictMode);
   }
-  // Treat -cmc option as unknown.
+  // Deprecated -cmc parsing just for compatibility.
   const std::string IgcmcOptName =
       Options.getOption(OPT_igcmc).getPrefixedName();
-  if (HasOption(IgcmcOptName))
-    return make_error<vc::OptionError>(IgcmcOptName, /*IsInternal=*/false);
+  if (HasOption(IgcmcOptName)) {
+    llvm::errs()
+        << "'" << IgcmcOptName
+        << "' option is deprecated and will be removed in the future release. "
+           "Use -vc-codegen instead for compiling from SPIRV.\n";
+    const unsigned FlagsToInclude =
+        IGC::options::IgcmcApiOption | IGC::options::IGCApiOption;
+    return parseOptions<ID, OPT_UNKNOWN, OPT_INPUT>(Argv, FlagsToInclude,
+                                                    Options, IsStrictMode);
+  }
 
   return make_error<vc::NotVCError>();
 }