Fix disable multi SIMD compile for indirect calls

Don't do CloneFunctionGroupForMultiSIMDCompile() when EnableSIMDVariantCompilation is disabled.

Author: dlei6g

IGC/Compiler/CISACodeGen/GenCodeGenModule.cpp

@@ -312,7 +312,7 @@ void GenXCodeGenModule::processFunction(Function& F)
             if (IGC_IS_FLAG_DISABLED(EnableSIMDVariantCompilation))
             {
                 int req_subgroup = 0;
-                for (auto FG : CallerFGs)
+                for (const auto& FG : CallerFGs)
                 {
                     auto FHead = FG.first->getHead();
                     auto subGrpSz = pMdUtils->getFunctionsInfoItem(FHead)->getSubGroupSize();
@@ -607,7 +607,8 @@ bool GenXCodeGenModule::runOnModule(Module& M)
     }
 
     // Clone indirect funcs if SIMD variants are required
-    FGA->CloneFunctionGroupForMultiSIMDCompile(&M);
+    if (IGC_IS_FLAG_ENABLED(EnableSIMDVariantCompilation))
+        FGA->CloneFunctionGroupForMultiSIMDCompile(&M);
 
     this->pMdUtils->save(M.getContext());
 
@@ -997,7 +998,7 @@ void GenXFunctionGroupAnalysis::CloneFunctionGroupForMultiSIMDCompile(llvm::Modu
         if (hasReqdSIMD > 0)
         {
             bool ReqMultipleSIMD = hasReqdSIMD != 8 && hasReqdSIMD != 16 && hasReqdSIMD != 32;
-            if (IGC_IS_FLAG_ENABLED(EnableSIMDVariantCompilation) && ReqMultipleSIMD)
+            if (ReqMultipleSIMD)
             {
                 for (int i = 0; i < 3; i++)
                 {
@@ -1023,11 +1024,6 @@ void GenXFunctionGroupAnalysis::CloneFunctionGroupForMultiSIMDCompile(llvm::Modu
                     }
                 }
             }
-            else
-            {
-                IGC_ASSERT_MESSAGE(!ReqMultipleSIMD, "SIMD variant compilation not supported");
-                continue;
-            }
         }
     }