add constant folding and verification pass for pim host operations

better validation scripts output
big refactors

src/PIM/Conversion/SpatialToGraphviz/SpatialToGraphviz.cpp

@@ -10,6 +10,7 @@
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/Format.h"
 
+#include "src/Accelerators/PIM/Common/PIMCommon.hpp"
 #include "src/Accelerators/PIM/Dialect/Spatial/SpatialOps.hpp"
 #include "src/Accelerators/PIM/Pass/PimPasses.hpp"
 #include "src/Dialect/ONNX/ONNXOps.hpp"
@@ -199,12 +200,12 @@ private:
 void SpatialToGraphvizPass::runOnOperation() {
   ModuleOp module = getOperation();
 
-  // Get the first OP, must be a FuncOp
-  func::FuncOp func = *module.getOps<func::FuncOp>().begin();
-  if (!func) {
-    module->emitError("No FuncOp found in the begin of module");
+  auto entryFunc = getPimEntryFunc(module);
+  if (failed(entryFunc)) {
     signalPassFailure();
+    return;
   }
+  func::FuncOp func = *entryFunc;
 
   os << "digraph G {\n"
      << "\tnode [style=filled,color=white];\n";