Finish deprecating implicitGID

ImplicitGID pass has been deprecated. Remove related code.

Author: Kotynia, Piotr

IGC/Compiler/CISACodeGen/CodeSinking.cpp

@@ -736,11 +736,8 @@ namespace IGC {
                     // which is not really a local-code-motion
                     if (def->getNextNode() != use && !isa<PHINode>(use))
                     {
-                        if (!def->getMetadata("implicitGlobalID"))
-                        {
-                            def->moveBefore(use);
-                            madeChange = true;
-                        }
+                        def->moveBefore(use);
+                        madeChange = true;
                     }
                     localInstSet.erase(def);
                 }

IGC/Compiler/InitializePasses.h

@@ -92,8 +92,6 @@ void initializeInsertGenericPtrArithmeticMetadataPass(llvm::PassRegistry&);
 void initializeImageFuncResolutionPass(llvm::PassRegistry&);
 void initializeImageFuncsAnalysisPass(llvm::PassRegistry&);
 void initializeImage3dToImage2darrayPass(llvm::PassRegistry&);
-void initializeImplicitGlobalIdPass(llvm::PassRegistry&);
-void initializeCleanImplicitIdsPass(llvm::PassRegistry&);
 void initializeInlineLocalsResolutionPass(llvm::PassRegistry&);
 void initializeInlineUnmaskedFunctionsPassPass(llvm::PassRegistry&);
 void initializeInsertBranchOptPass(llvm::PassRegistry&);
@@ -239,7 +237,6 @@ void initializeDebugInfoPassPass(llvm::PassRegistry&);
 void initializeIGCLivenessAnalysisPass(llvm::PassRegistry&);
 void initializePromoteConstantStructsPass(llvm::PassRegistry&);
 void initializeLowerInvokeSIMDPass(llvm::PassRegistry&);
-void initializeImplicitGIDRestoringPass(llvm::PassRegistry&);
 void initializeRemoveCodeAssumptionsPass(llvm::PassRegistry&);
 void initializePromoteBoolsPass(llvm::PassRegistry&);
 void initializeResolveConstExprCallsPass(llvm::PassRegistry&);

IGC/Compiler/Optimizer/Scalarizer.cpp

@@ -160,21 +160,6 @@ bool ScalarizeFunction::runOnFunction(Function& F)
         if (Value * val = dyn_cast<Value>(*index))
         {
             UndefValue* undefVal = UndefValue::get((*index)->getType());
-
-            if (MDNode* pEIMD = (*index)->getMetadata("implicitGlobalID"))
-            {
-                // Compute thread and group identification instructions must have 'Output' attribute
-                // added later during compilation. The implicitGlobalID metadata attached to this
-                // instruction must be assigned to a new instruction, which replaces this instruction.
-                // Unfortunatelly, replaceAllUsesWith() will not ensure such propagation.
-                Instruction* pNewInst = dyn_cast_or_null<llvm::Instruction>(undefVal);
-                if (pNewInst)
-                {
-                    IGC_ASSERT_MESSAGE(pNewInst, "Missing implicit global ID instruction");
-                    Instruction* instr = dyn_cast<Instruction>(*index);
-                    pNewInst->copyMetadata(*instr);
-                }
-            }
             (val)->replaceAllUsesWith(undefVal);
         }
         IGC_ASSERT_MESSAGE((*index)->use_empty(), "Unable to remove used instruction");