[Mlir-commits] [mlir] [MLIR][Vector] Add Lowering for vector.step (PR #113655)

[Manupa Karunaratne]

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@@ -0,0 +1,64 @@
+//===- LowerVectorStep.cpp - Lower 'vector.step' operation ----------------===//
+//
+// 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 target-independent rewrites and utilities to lower the
+// 'vector.step' operation.
+//
+//===----------------------------------------------------------------------===//
+
+#include "mlir/Dialect/Affine/IR/AffineOps.h"
+#include "mlir/Dialect/Arith/IR/Arith.h"
+#include "mlir/Dialect/Arith/Utils/Utils.h"
+#include "mlir/Dialect/Linalg/IR/Linalg.h"
+#include "mlir/Dialect/MemRef/IR/MemRef.h"
+#include "mlir/Dialect/SCF/IR/SCF.h"
+#include "mlir/Dialect/Tensor/IR/Tensor.h"
+#include "mlir/Dialect/Utils/IndexingUtils.h"
+#include "mlir/Dialect/Utils/StructuredOpsUtils.h"
+#include "mlir/Dialect/Vector/IR/VectorOps.h"
+#include "mlir/Dialect/Vector/Transforms/LoweringPatterns.h"
+#include "mlir/Dialect/Vector/Utils/VectorUtils.h"
+#include "mlir/IR/BuiltinAttributeInterfaces.h"
+#include "mlir/IR/BuiltinTypes.h"
+#include "mlir/IR/ImplicitLocOpBuilder.h"
+#include "mlir/IR/Location.h"
+#include "mlir/IR/Matchers.h"
+#include "mlir/IR/PatternMatch.h"
+#include "mlir/IR/TypeUtilities.h"
+#include "mlir/Interfaces/VectorInterfaces.h"
+
+#define DEBUG_TYPE "vector-step-lowering"
+
+using namespace mlir;
+using namespace mlir::vector;
+
+namespace {
+
+struct StepToArithOps : public OpRewritePattern<vector::StepOp> {
+  using OpRewritePattern::OpRewritePattern;
+
+  LogicalResult matchAndRewrite(vector::StepOp stepOp,
+                                PatternRewriter &rewriter) const override {
+    auto resultType = cast<VectorType>(stepOp.getType());
+    if (!resultType.isScalable()) {
+      SmallVector<APInt> indices;
+      for (unsigned i = 0; i < resultType.getNumElements(); i++)
+        indices.push_back(APInt(/*width=*/64, i));
+      rewriter.replaceOpWithNewOp<arith::ConstantOp>(
+          stepOp, DenseElementsAttr::get(resultType, indices));
+      return success();
+    }
+    return failure();
----------------
manupak wrote:

done

https://github.com/llvm/llvm-project/pull/113655