better throughput scheduling with steady state cost model, now limited to spatial

src/PIM/Common/IR/ConstantUtils.cpp

@@ -10,6 +10,18 @@ using namespace mlir;
 
 namespace onnx_mlir {
 
+bool isZeroBitPatternSplat(Attribute value) {
+  auto dense = dyn_cast_or_null<DenseElementsAttr>(value);
+  if (!dense || !dense.isSplat())
+    return false;
+  Attribute element = dense.getSplatValue<Attribute>();
+  if (auto floating = dyn_cast<FloatAttr>(element))
+    return floating.getValue().isZero() && !floating.getValue().isNegative();
+  if (auto integer = dyn_cast<IntegerAttr>(element))
+    return integer.getValue().isZero();
+  return false;
+}
+
 ConstantPool::ConstantPool(Operation *constantAnchor, OpBuilder &builder)
   : anchor(constantAnchor), block(getConstantInsertionBlock(constantAnchor)),
     builder(builder) {