[Mlir-commits] [mlir] [SCFToAffine] Add a pass to raise scf to affine ops. (PR #152925)

[Oleksandr Alex Zinenko]

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@@ -0,0 +1,100 @@
+//===- SCFToAffine.cpp - SCF to Affine conversion -------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements a pass to raise scf.for, scf.if and loop.terminator
+// ops into affine ops.
+//
+//===----------------------------------------------------------------------===//
+
+#include "mlir/Conversion/SCFToAffine/SCFToAffine.h"
+#include "mlir/Dialect/Affine/IR/AffineOps.h"
+#include "mlir/Dialect/SCF/IR/SCF.h"
+#include "mlir/IR/Verifier.h"
+#include "mlir/Transforms/DialectConversion.h"
+#include "mlir/Transforms/Passes.h"
+
+namespace mlir {
+#define GEN_PASS_DEF_RAISESCFTOAFFINEPASS
+#include "mlir/Conversion/Passes.h.inc"
+} // namespace mlir
+
+using namespace mlir;
+
+namespace {
+
+struct SCFToAffinePass
+    : public impl::RaiseSCFToAffinePassBase<SCFToAffinePass> {
+  void runOnOperation() override;
+};
+
+struct ForOpRewrite : public OpRewritePattern<scf::ForOp> {
+  using OpRewritePattern<scf::ForOp>::OpRewritePattern;
+
+  LogicalResult matchAndRewrite(scf::ForOp op,
+                                PatternRewriter &rewriter) const override {
+    auto loc = op.getLoc();
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ftynse wrote:

Nit: please only use `auto` when it improves readability. E.g., the type is long (iterators) or impossible (lambdas) to spell.

https://github.com/llvm/llvm-project/pull/152925