[StackOverflowDetectionDo not add detection calls if no VLA or stackcalls are present in the module.

Adding these calls has performance impact on small kernels.

Author: PawelJurek

IGC/AdaptorCommon/ProcessFuncAttributes.cpp

@@ -854,6 +854,29 @@ bool ProcessFuncAttributes::runOnModule(Module& M)
                 SetNoInline(F);
             }
         }
+
+        bool HasStackCallsOrVLA =
+            std::any_of(M.getFunctionList().begin(), M.getFunctionList().end(),
+                        [](auto &F) {
+                          return F.hasFnAttribute("visaStackCall") ||
+                                 F.hasFnAttribute("hasVLA");
+                        });
+        if (!HasStackCallsOrVLA) {
+            for (auto FuncName : DetectionFunctions) {
+                if (auto F = M.getFunction(FuncName)) {
+                    std::vector<CallInst *> CallersToDelete;
+                    for (auto User : F->users()) {
+                        if (auto I = dyn_cast<CallInst>(User)) {
+                            CallersToDelete.push_back(I);
+                        }
+                    }
+                    std::for_each(
+                        CallersToDelete.begin(), CallersToDelete.end(),
+                        [](auto CallInst) { CallInst->eraseFromParent(); });
+                    F->eraseFromParent();
+                }
+            }
+        }
     }
 
     return true;