[Autobackout][Manual]Revert of change: 878b804

Add global dead code elimnation pass before ErrorCheck pass
to get rid of dead functions which may contain fp64 types

Change-Id: I5d787b096bf7f78b0818cc2b2c2524c13f03c29f

Author: FilipFudala

IGC/AdaptorOCL/UnifyIROCL.cpp

@@ -279,10 +279,6 @@ static void CommonOCLBasedPasses(
     mpm.add(new MetaDataUtilsWrapper(pMdUtils, pContext->getModuleMetaData()));
     mpm.add(new CodeGenContextWrapper(pContext));
 
-    // Run GlobalDCE before ErrorCheck to remove dead functions which may contain fp64 types
-    mpm.add(createProcessFuncAttributesPass());
-    mpm.add(createGlobalDCEPass());
-
     mpm.add(new ErrorCheck());
 
     mpm.add(new ClampLoopUnroll(256));