debug VisaMap is not needed for debug info

Author: aparshin-intel

IGC/Compiler/CISACodeGen/CISABuilder.cpp

@@ -5252,18 +5252,7 @@ namespace IGC
             memcpy_s(dbgInfo, dbgSize, genxdbgInfo, dbgSize);
 
             freeBlock(genxdbgInfo);
-
-            if (numElems > 0 && VISAMap)
-            {
-                for (unsigned int i = 0; i < numElems * 2; i += 2)
-                {
-                    auto GenISAOffset = ((unsigned int*)VISAMap)[i];
-                    auto VISAIndex = ((unsigned int*)VISAMap)[i + 1];
-                    m_program->m_VISAIndexToGenISAOff.push_back(std::make_pair(VISAIndex, GenISAOffset));
-                }
-
-                freeBlock(VISAMap);
-            }
+            freeBlock(VISAMap);
         }
 
         pOutput->m_programBin = kernel;

IGC/Compiler/CISACodeGen/ShaderCodeGen.hpp

@@ -438,10 +438,6 @@ class CShader
 
     static unsigned GetIMEReturnPayloadSize(llvm::GenIntrinsicInst* I);
 
-    // When debug info is enabled, this vector stores mapping of
-    // VISA index->Gen ISA offset. Currently, some APIs uses this
-    // to dump out elf.
-    std::vector<std::pair<unsigned int, unsigned int>> m_VISAIndexToGenISAOff;
     void addCVarsForVectorBC(llvm::BitCastInst* BCI, llvm::SmallVector<CVariable*, 8> CVars)
     {
         IGC_ASSERT_MESSAGE(m_VectorBCItoCVars.find(BCI) == std::end(m_VectorBCItoCVars), "a variable already exists for this vector bitcast");