Support for SPV_KHR_linkonce_odr in SPIRV Reader

Author: aratajew

IGC/AdaptorOCL/SPIRV/SPIRVReader.cpp

@@ -1837,6 +1837,9 @@ SPIRVToLLVM::transLinkageType(const SPIRVValue* V) {
     // Definition
     return GlobalValue::AvailableExternallyLinkage;
   }
+  else if (V->getLinkageType() == LinkageTypeLinkOnceODR) {
+    return GlobalValue::LinkOnceODRLinkage;
+  }
   else {// LinkageTypeExport
     if (V->getOpCode() == OpVariable) {
       if (static_cast<const SPIRVVariable*>(V)->getInitializer() == 0 )

IGC/AdaptorOCL/SPIRV/libSPIRV/spirv.hpp

@@ -333,6 +333,7 @@ enum FPRoundingMode {
 enum LinkageType {
     LinkageTypeExport = 0,
     LinkageTypeImport = 1,
+    LinkageTypeLinkOnceODR = 2,
     LinkageTypeInternal, /* internal use only */
     LinkageTypeCount /* internal use only */
 };