[Mlir-commits] [mlir] [MLIR][XeGPU][VectorToXeGPU] Fix transfer_read/write cases with non-contiguous memrefs (PR #158126)

[Dmitry Chigarev]

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@@ -315,51 +325,30 @@ static Value computeOffsets(VectorTransferOpInterface xferOp,
         arith::AddIOp::create(rewriter, loc, localOffsets, broadcasted[i]);
 
   // Compute base offset from transfer read indices
-  Value baseOffset = nullptr;
-  if (!indices.empty()) {
-    baseOffset = arith::ConstantIndexOp::create(rewriter, loc, 0);
-    for (size_t i = 0; i < indices.size(); ++i) {
-      Value strideVal = strides[i];
-      Value offsetContrib =
-          arith::MulIOp::create(rewriter, loc, indices[i], strideVal);
-      baseOffset =
-          arith::AddIOp::create(rewriter, loc, baseOffset, offsetContrib);
-    }
-    // Broadcast base offset to match vector shape
-    Value bcastBase = vector::BroadcastOp::create(
-        rewriter, loc, fullIndexVectorType, baseOffset);
-    localOffsets =
-        arith::AddIOp::create(rewriter, loc, bcastBase, localOffsets);
+  for (size_t i = 0; i < indices.size(); ++i) {
+    Value strideVal = strides[i];
+    Value offsetContrib =
+        arith::MulIOp::create(rewriter, loc, indices[i], strideVal);
+    baseOffset =
+        arith::AddIOp::create(rewriter, loc, baseOffset, offsetContrib);
   }
+  // Broadcast base offset to match vector shape
+  Value bcastBase = vector::BroadcastOp::create(
+      rewriter, loc, fullIndexVectorType, baseOffset);
+  localOffsets = arith::AddIOp::create(rewriter, loc, bcastBase, localOffsets);
   return localOffsets;
 }
 
-// Collapse memref shape to 1D
-static Value collapseMemrefTo1D(VectorTransferOpInterface xferOp,
-                                PatternRewriter &rewriter) {
+// Convert memref to i64 base pointer
+static Value memrefToIndexPtr(VectorTransferOpInterface xferOp,
+                              PatternRewriter &rewriter) {
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dchigarev wrote:

`memref.collapse_shape` -> `memref.extract_aligned_pointer_as_index + arith.index_cast index -> i64`

https://github.com/llvm/llvm-project/pull/158126