[Mlir-commits] [mlir] [MLIR][XeGPU] Add integration with XeGPU load / store ops to / from memref subview. (PR #170385)

[Sang Ik Lee]

https://github.com/silee2 created https://github.com/llvm/llvm-project/pull/170385

Add XeGPU integration test for missing usage case: base memory from memref subview.

>From 280c4212da667244eaa9ef556f47af946bf05aa4 Mon Sep 17 00:00:00 2001
From: "Lee, Sang Ik" <sang.ik.lee at intel.com>
Date: Tue, 2 Dec 2025 22:45:28 +0000
Subject: [PATCH] [MLIR][XeGPU] Add integration with XeGPU load / store ops to
 / from memref subview.

---
 .../XeGPU/LANE/load_store_subview.mlir        | 63 +++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 mlir/test/Integration/Dialect/XeGPU/LANE/load_store_subview.mlir

diff --git a/mlir/test/Integration/Dialect/XeGPU/LANE/load_store_subview.mlir b/mlir/test/Integration/Dialect/XeGPU/LANE/load_store_subview.mlir
new file mode 100644
index 0000000000000..c4608acb7b7b5
--- /dev/null
+++ b/mlir/test/Integration/Dialect/XeGPU/LANE/load_store_subview.mlir
@@ -0,0 +1,63 @@
+// RUN: mlir-opt %s --gpu-lower-to-xevm-pipeline="xegpu-op-level=lane" \
+// RUN: | mlir-runner \
+// RUN:   --shared-libs=%mlir_levelzero_runtime \
+// RUN:   --shared-libs=%mlir_runner_utils \
+// RUN:   --entry-point-result=void \
+// RUN: | FileCheck %s
+
+module @subview attributes {gpu.container_module} {
+  gpu.module @kernel {
+    gpu.func @subview(%src: memref<256xf32>, %dst: memref<256xf32>) kernel {
+      %src_subview = memref.subview %src[5] [251] [1] : memref<256xf32> to memref<251xf32, strided<[1], offset: 5>>
+      %dst_subview = memref.subview %dst[10] [246] [1] : memref<256xf32> to memref<246xf32, strided<[1], offset: 10>>
+      %lane_id = gpu.lane_id
+      %mask = arith.constant 1 : i1
+      %loaded = xegpu.load %src_subview[%lane_id], %mask : memref<251xf32, strided<[1], offset: 5>>, index, i1 -> f32
+      xegpu.store %loaded, %dst_subview[%lane_id], %mask : f32, memref<246xf32, strided<[1], offset: 10>>, index, i1
+      gpu.return
+    }
+  }
+  func.func @test(%src: memref<256xf32>, %dst: memref<256xf32>) -> memref<256xf32> {
+    %memref_src = gpu.alloc  () : memref<256xf32>
+    gpu.memcpy %memref_src, %src : memref<256xf32>, memref<256xf32>
+    %memref_dst = gpu.alloc  () : memref<256xf32>
+    gpu.memcpy %memref_dst, %dst : memref<256xf32>, memref<256xf32>
+    %c1 = arith.constant 1 : index
+    %c16 = arith.constant 16 : index
+    gpu.launch_func @kernel::@subview blocks in (%c1, %c1, %c1) threads in (%c16, %c1, %c1) args(%memref_src : memref<256xf32>, %memref_dst : memref<256xf32>)
+    gpu.wait // Wait for the kernel to finish.
+    gpu.memcpy %dst, %memref_dst : memref<256xf32>, memref<256xf32>
+    gpu.dealloc %memref_src : memref<256xf32>
+    gpu.dealloc %memref_dst : memref<256xf32>
+    return %dst : memref<256xf32>
+  }
+  func.func @main() {
+    %c0 = arith.constant 0 : index
+    %c1 = arith.constant 1 : index
+    %c256 = arith.constant 256 : index
+    %memref_src = memref.alloc() : memref<256xf32>
+    %memref_dst = memref.alloc() : memref<256xf32>
+    // Initialize source memref
+    scf.for %i = %c0 to %c256 step %c1 {
+      %val = arith.index_cast %i : index to i32
+      %val_float = arith.sitofp %val : i32 to f32
+      memref.store %val_float, %memref_src[%i] : memref<256xf32>
+    }
+    // Initialize destination memref to zero
+    scf.for %i = %c0 to %c256 step %c1 {
+      %zero = arith.constant 0.0 : f32
+      memref.store %zero, %memref_dst[%i] : memref<256xf32>
+    }
+    // Call test function
+    %gpu_result = call @test(%memref_src, %memref_dst) : (memref<256xf32>, memref<256xf32>) -> memref<256xf32>
+    %gpu_result_casted = memref.cast %gpu_result : memref<256xf32> to memref<*xf32>
+    // CHECK: Unranked Memref base@ = 0x{{[0-9a-f]+}}
+    // CHECK: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+    call @printMemrefF32(%gpu_result_casted) : (memref<*xf32>) -> ()
+    // Deallocate memrefs
+    memref.dealloc %memref_src : memref<256xf32>
+    memref.dealloc %memref_dst : memref<256xf32>
+    return
+  }
+  func.func private @printMemrefF32(memref<*xf32>) attributes {llvm.emit_c_interface}
+}