[llvm] [TOSA] Add TosaToMLProgram conversion (PR #69787)

[Rob Suderman via llvm-commits]

================
@@ -0,0 +1,77 @@
+//===- TosaToMLProgram.cpp - Lowering Tosa to MLProgram Dialect
+//-----------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// These rewriters lower from the TOSA dialect to the MLProgram dialect.
+//
+//===----------------------------------------------------------------------===//
+
+#include "mlir/Conversion/TosaToMLProgram/TosaToMLProgram.h"
+#include "mlir/Dialect/MLProgram/IR/MLProgram.h"
+#include "mlir/Dialect/Tosa/IR/TosaOps.h"
+#include "mlir/IR/IRMapping.h"
+#include "mlir/IR/PatternMatch.h"
+
+using namespace mlir;
+using namespace tosa;
+namespace {
+
+class VariableOpConverter : public OpRewritePattern<tosa::VariableOp> {
+public:
+  using OpRewritePattern<tosa::VariableOp>::OpRewritePattern;
+
+  LogicalResult matchAndRewrite(tosa::VariableOp op,
+                                PatternRewriter &rewriter) const final {
+    auto newVariable = rewriter.create<mlir::ml_program::GlobalOp>(
+        op.getLoc(), op.getName(), op.getType(), /*is_mutable=*/true,
+        op.getInitialValueAttr(), nullptr);
+    newVariable.setPrivate();
+    rewriter.replaceOp(op, newVariable);
+    return success();
+  }
+};
+
+class VariableWriteOpConverter
+    : public OpRewritePattern<tosa::VariableWriteOp> {
+public:
+  using OpRewritePattern<tosa::VariableWriteOp>::OpRewritePattern;
+
+  LogicalResult matchAndRewrite(tosa::VariableWriteOp op,
+                                PatternRewriter &rewriter) const final {
+    auto globalSymbolRef =
+        SymbolRefAttr::get(rewriter.getContext(), op.getName());
+    auto newVariableWrite = rewriter.create<ml_program::GlobalStoreOp>(
+        op.getLoc(), globalSymbolRef, op.getValue());
+    rewriter.replaceOp(op, newVariableWrite);
+    return success();
+  }
+};
+
+class VariableReadOpConverter : public OpRewritePattern<tosa::VariableReadOp> {
+public:
+  using OpRewritePattern<tosa::VariableReadOp>::OpRewritePattern;
+
+  LogicalResult matchAndRewrite(tosa::VariableReadOp op,
+                                PatternRewriter &rewriter) const final {
+    auto globalSymbolRef =
+        SymbolRefAttr::get(rewriter.getContext(), op.getName());
+    auto newVariableRead = rewriter.create<ml_program::GlobalLoadOp>(
+        op.getLoc(), op.getType(), globalSymbolRef);
+    rewriter.replaceOp(op, newVariableRead);
+
+    return success();
+  }
+};
+
+} // namespace
+
+void mlir::tosa::populateTosaToMLProgramConversionPatterns(
+    RewritePatternSet *patterns) {
+  patterns->add<VariableOpConverter, VariableWriteOpConverter,
+                VariableReadOpConverter>(patterns->getContext());
+}
----------------
rsuderman wrote:

Missing newline at the end of the file.

https://github.com/llvm/llvm-project/pull/69787