[Mlir-commits] [mlir] [mlir][XeGPU][Transform] Add vectorlinearize transform pass. (PR #158084)

[Adam Siemieniuk]

================
@@ -0,0 +1,101 @@
+//===- XeGPUVectorLinearize.cpp - Linearizes n-D vectors to 1-D vectors
+//-------===//
+//
+// 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/SCF/IR/SCF.h"
+#include "mlir/Dialect/SCF/Transforms/Patterns.h"
+#include "mlir/Dialect/Vector/IR/VectorOps.h"
+#include "mlir/Dialect/Vector/Transforms/LoweringPatterns.h"
+#include "mlir/Dialect/Vector/Transforms/VectorRewritePatterns.h"
+#include "mlir/Dialect/XeGPU/IR/XeGPU.h"
+#include "mlir/Dialect/XeGPU/Transforms/Passes.h"
+#include "mlir/Pass/Pass.h"
+#include "mlir/Transforms/DialectConversion.h"
+#include "mlir/Transforms/GreedyPatternRewriteDriver.h"
+
+#include <optional>
+
+namespace mlir {
+namespace xegpu {
+#define GEN_PASS_DEF_XEGPUVECTORLINEARIZE
+#include "mlir/Dialect/XeGPU/Transforms/Passes.h.inc"
+} // namespace xegpu
+} // namespace mlir
+
+#define DEBUG_TYPE "xegpu-vector-linearize"
+
+using namespace mlir;
+
+namespace {
+struct XeGPUVectorLinearizePass final
+    : public xegpu::impl::XeGPUVectorLinearizeBase<XeGPUVectorLinearizePass> {
+  void runOnOperation() override {
+    // vector.broadcast and vector.gather requires progressive lowering
+    {
+      mlir::RewritePatternSet patterns(&getContext());
+      mlir::vector::populateVectorBroadcastLoweringPatterns(patterns);
+      mlir::vector::populateVectorGatherLoweringPatterns(patterns);
+      mlir::vector::populateVectorGatherToConditionalLoadPatterns(patterns);
+      // vector.transpose lowering
+      // Shuffle16x16 will fallback to Shuffle1D for non 16x16 sizes.
+      mlir::vector::populateVectorTransposeLoweringPatterns(
+          patterns, mlir::vector::VectorTransposeLowering::Shuffle16x16);
+      (void)mlir::applyPatternsGreedily(getOperation(), std::move(patterns));
+    }
+
+    // Unroll load store from <<MxN> to M <1xN> load/stores and then linearize
----------------
adam-smnk wrote:

```suggestion
    // Unroll load store from <MxN> to M <1xN> load/stores and then linearize
```

https://github.com/llvm/llvm-project/pull/158084