[Mlir-commits] [mlir] [mlir][EmitC]Add a Reflection Map to a Class (PR #150572)
Paul Kirth
llvmlistbot at llvm.org
Tue Jul 29 09:40:14 PDT 2025
================
@@ -0,0 +1,156 @@
+//===- 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 *mapLibraryHeader = "map";
+constexpr const char *stringLibraryHeader = "string";
+
+IncludeOp addHeader(OpBuilder &builder, ModuleOp module, StringRef headerName) {
+ StringAttr includeAttr = builder.getStringAttr(headerName);
+ return builder.create<emitc::IncludeOp>(
+ module.getLoc(), includeAttr,
+ /*is_standard_include=*/builder.getUnitAttr());
+}
+
+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 hasMapHdr = false;
+ bool hasStringHdr = 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() == mapLibraryHeader)
+ hasMapHdr = true;
+ if (includeOp.getInclude() == stringLibraryHeader)
+ hasStringHdr = true;
+ }
+ if (hasMapHdr && hasStringHdr)
+ return;
+ }
+
+ mlir::OpBuilder builder(module.getBody(), module.getBody()->begin());
+ if (!hasMapHdr) {
+ addHeader(builder, module, mapLibraryHeader);
+ }
+ if (!hasStringHdr) {
+ addHeader(builder, module, stringLibraryHeader);
+ }
+ }
+};
+
+} // namespace
+} // namespace emitc
+} // namespace mlir
+
+class AddReflectionMapClass : public OpRewritePattern<emitc::ClassOp> {
+public:
+ AddReflectionMapClass(MLIRContext *context, StringRef attrName)
+ : OpRewritePattern<emitc::ClassOp>(context), attributeName(attrName) {}
+
+ LogicalResult matchAndRewrite(mlir::emitc::ClassOp classOp,
+ PatternRewriter &rewriter) const override {
+ MLIRContext *context = rewriter.getContext();
+
+ // Define the opaque types
+ emitc::OpaqueType mapType = mlir::emitc::OpaqueType::get(
+ context, "const std::map<std::string, char*>");
+
+ // Collect all field names
+ std::vector<std::pair<std::string, std::string>> fieldNames;
+ classOp.walk([&](mlir::emitc::FieldOp fieldOp) {
+ if (DictionaryAttr innerDictAttr = dyn_cast<mlir::DictionaryAttr>(
+ fieldOp->getAttrDictionary().get("attrs"))) {
+ ArrayAttr arrayAttr = cast<mlir::ArrayAttr>(
+ innerDictAttr.getNamed(attributeName)->getValue());
+ StringAttr stringAttr = cast<mlir::StringAttr>(arrayAttr[0]);
+ fieldNames.emplace_back(stringAttr.getValue().str(),
+ fieldOp.getName().str());
+
+ } else {
+ fieldOp.emitError()
+ << "FieldOp must have a dictionary attribute named '"
+ << attributeName << "'"
+ << "with an array containing a string attribute";
+ }
+ });
+
+ std::stringstream ss;
+ ss << "{ ";
+ for (size_t i = 0; i < fieldNames.size(); ++i) {
+ ss << " { \"" << fieldNames[i].first << "\", reinterpret_cast<char*>(&"
+ << fieldNames[i].second << ") }";
+ if (i < fieldNames.size() - 1) {
+ ss << ", ";
+ }
+ }
+ ss << " }";
+
+ emitc::FuncOp executeFunc =
+ classOp.lookupSymbol<mlir::emitc::FuncOp>("execute");
+ if (executeFunc)
+ rewriter.setInsertionPoint(executeFunc);
+ else
+ classOp.emitError() << "ClassOp must contain a function named 'execute' "
+ "to add reflection map";
----------------
ilovepi wrote:
Should we stop in the error case? I'd assume you'd want to return an error code here, instead of continuing.
https://github.com/llvm/llvm-project/pull/150572
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