[mlir][XeGPU] Add a builder for xegpu.create_nd_tdesc op. (#116472)

The builder is needed to support dynamic meref as source operand in
xegpu.create_nd_tdesc op.

Author: mshahneo

mlir/include/mlir/Dialect/XeGPU/IR/XeGPUOps.td

@@ -130,6 +130,11 @@ def XeGPU_CreateNdDescOp: XeGPU_Op<"create_nd_tdesc", [Pure, ViewLikeOpInterface
     OpBuilder<(ins "Type": $tdesc, "TypedValue<MemRefType>": $source,
                    "llvm::ArrayRef<OpFoldResult>": $offsets)>,
 
+    OpBuilder<(ins "Type": $tdesc, "TypedValue<MemRefType> ": $source,
+                   "llvm::ArrayRef<OpFoldResult>": $offsets,
+                   "llvm::ArrayRef<OpFoldResult>": $shape,
+                   "llvm::ArrayRef<OpFoldResult>": $strides)>,
+
     OpBuilder<(ins "Type": $tdesc, "TypedValue<IntegerType> ": $source,
                    "llvm::ArrayRef<OpFoldResult>": $offsets,
                    "llvm::ArrayRef<OpFoldResult>": $shape,

mlir/lib/Dialect/XeGPU/IR/XeGPUOps.cpp

@@ -93,6 +93,33 @@ void CreateNdDescOp::build(OpBuilder &builder, OperationState &state,
         {} /* empty const strides*/);
 }
 
+void CreateNdDescOp::build(OpBuilder &builder, OperationState &state,
+                           Type tdesc, TypedValue<MemRefType> source,
+                           llvm::ArrayRef<OpFoldResult> offsets,
+                           llvm::ArrayRef<OpFoldResult> shape,
+                           llvm::ArrayRef<OpFoldResult> strides) {
+  assert(shape.size() && offsets.size() && strides.size() &&
+         shape.size() == strides.size() && shape.size() == offsets.size());
+
+  llvm::SmallVector<int64_t> staticOffsets;
+  llvm::SmallVector<int64_t> staticShape;
+  llvm::SmallVector<int64_t> staticStrides;
+  llvm::SmallVector<Value> dynamicOffsets;
+  llvm::SmallVector<Value> dynamicShape;
+  llvm::SmallVector<Value> dynamicStrides;
+
+  dispatchIndexOpFoldResults(offsets, dynamicOffsets, staticOffsets);
+  dispatchIndexOpFoldResults(shape, dynamicShape, staticShape);
+  dispatchIndexOpFoldResults(strides, dynamicStrides, staticStrides);
+
+  auto staticOffsetsAttr = builder.getDenseI64ArrayAttr(staticOffsets);
+  auto staticShapeAttr = builder.getDenseI64ArrayAttr(staticShape);
+  auto staticStridesAttr = builder.getDenseI64ArrayAttr(staticStrides);
+
+  build(builder, state, tdesc, source, dynamicOffsets, dynamicShape,
+        dynamicStrides, staticOffsetsAttr, staticShapeAttr, staticStridesAttr);
+}
+
 void CreateNdDescOp::build(OpBuilder &builder, OperationState &state,
                            Type tdesc, TypedValue<IntegerType> source,
                            llvm::ArrayRef<OpFoldResult> offsets,