message: ispcrt: Change default IGC command line
  The "-cmc" options is obsolete, "-vc-codegen" should be used
  instead.
diff: @@ -218,7 +218,7 @@ struct Module : public ispcrt::base::Module {
  // + or = sign. '+' means that the content of the variable should
  // be added to the default igc options, while '=' will replace
  // the options with the content of the env var.
  - std::string igcOptions = "-cmc";
  + std::string igcOptions = "-vc-codegen -no-optimize";
  constexpr auto MAX_ISPCRT_IGC_OPTIONS = 2000UL;
  const char* userIgcOptionsEnv = getenv("ISPCRT_IGC_OPTIONS");
  