fix missed failing tests for channels

moderate refactor

src/PIM/Pass/PimCodegen/HostConstantFolding/HostConstantFoldingPass.cpp

@@ -0,0 +1,52 @@
+#include "mlir/Pass/Pass.h"
+#include "mlir/Transforms/GreedyPatternRewriteDriver.h"
+
+#include <memory>
+
+#include "Patterns.hpp"
+#include "src/Accelerators/PIM/Common/PimCommon.hpp"
+
+using namespace mlir;
+
+namespace onnx_mlir {
+namespace {
+
+struct HostConstantFoldingPass : PassWrapper<HostConstantFoldingPass, OperationPass<ModuleOp>> {
+  MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(HostConstantFoldingPass)
+
+  StringRef getArgument() const override { return "pim-host-constant-folding-pass"; }
+  StringRef getDescription() const override { return "Fold host-side constant expressions before PIM verification"; }
+
+  LogicalResult initialize(MLIRContext* context) override {
+    RewritePatternSet owningPatterns(context);
+    for (auto* dialect : context->getLoadedDialects())
+      dialect->getCanonicalizationPatterns(owningPatterns);
+    for (RegisteredOperationName op : context->getRegisteredOperations())
+      op.getCanonicalizationPatterns(owningPatterns, context);
+
+    populateConstantFoldingConstantPatterns(owningPatterns);
+    populateConstantFoldingSubviewPatterns(owningPatterns);
+
+    patterns = std::make_shared<FrozenRewritePatternSet>(std::move(owningPatterns));
+    return success();
+  }
+
+  void runOnOperation() override {
+    GreedyRewriteConfig config;
+    config.enableFolding();
+    if (failed(applyPatternsGreedily(getOperation(), *patterns, config))) {
+      signalPassFailure();
+      return;
+    }
+
+    dumpModule(getOperation(), "pim2_folded");
+  }
+
+  std::shared_ptr<const FrozenRewritePatternSet> patterns;
+};
+
+} // namespace
+
+std::unique_ptr<Pass> createPimHostConstantFoldingPass() { return std::make_unique<HostConstantFoldingPass>(); }
+
+} // namespace onnx_mlir