[Mlir-commits] [mlir] [mlir][EmitC]Add a Reflection Map to a Class (PR #150572)

[Paul Kirth]

================
@@ -0,0 +1,180 @@
+//===- AddReflectionMap.cpp - Add a reflection map to a class -------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+#include "mlir/Dialect/EmitC/IR/EmitC.h"
+#include "mlir/Dialect/EmitC/Transforms/Passes.h"
+#include "mlir/Dialect/EmitC/Transforms/Transforms.h"
+#include "mlir/IR/Attributes.h"
+#include "mlir/IR/Builders.h"
+#include "mlir/IR/BuiltinAttributes.h"
+#include "mlir/IR/PatternMatch.h"
+#include "mlir/Transforms/WalkPatternRewriteDriver.h"
+
+using namespace mlir;
+using namespace emitc;
+
+namespace mlir {
+namespace emitc {
+#define GEN_PASS_DEF_ADDREFLECTIONMAPPASS
+#include "mlir/Dialect/EmitC/Transforms/Passes.h.inc"
+
+namespace {
+constexpr const char *kMapLibraryHeader = "map";
+constexpr const char *kStringLibraryHeader = "string";
+class AddReflectionMapPass
+    : public impl::AddReflectionMapPassBase<AddReflectionMapPass> {
+  using AddReflectionMapPassBase::AddReflectionMapPassBase;
+  void runOnOperation() override {
+    mlir::ModuleOp module = getOperation();
+
+    RewritePatternSet patterns(&getContext());
+    populateAddReflectionMapPatterns(patterns, namedAttribute);
+
+    walkAndApplyPatterns(module, std::move(patterns));
+    bool hasMap = false;
+    bool hasString = false;
+    for (auto &op : *module.getBody()) {
+      emitc::IncludeOp includeOp = llvm::dyn_cast<mlir::emitc::IncludeOp>(op);
+      if (!includeOp)
+        continue;
+      if (includeOp.getIsStandardInclude()) {
+        if (includeOp.getInclude() == kMapLibraryHeader)
+          hasMap = true;
+        if (includeOp.getInclude() == kStringLibraryHeader)
+          hasString = true;
+      }
+    }
+
+    if (hasMap && hasString)
+      return;
+
+    mlir::OpBuilder builder(module.getBody(), module.getBody()->begin());
+    if (!hasMap) {
+      StringAttr includeAttr = builder.getStringAttr(kMapLibraryHeader);
+      builder.create<mlir::emitc::IncludeOp>(
+          module.getLoc(), includeAttr,
+          /*is_standard_include=*/builder.getUnitAttr());
----------------
ilovepi wrote:

Since this code is repeated, I'd suggest making it a helper function or a lambda. Then the code here can be

```
  if(!hasMap)
     addHeader(kMapLibraryHeader);
  if(!hasString)
     addHeader(kMapLibraryHeader);
```

https://github.com/llvm/llvm-project/pull/150572