[mlir] Add C bindings for StridedArrayAttr

[ftynse]

mlir/include/mlir-c/BuiltinAttributes.h

553–556

80 cols plz.

mlir/lib/CAPI/IR/BuiltinAttributes.cpp

734

Ditto.

[shabalin]

Fix formatting to fit within 80 cols

[shabalin]

clang-format

mlir/include/mlir-c/BuiltinAttributes.h

 MLIR_CAPI_EXPORTED MlirAttribute
 mlirSparseElementsAttrGetIndices(MlirAttribute attr);
 
 /// Returns the dense elements attribute containing the non-null elements in the
 /// given sparse elements attribute.
 MLIR_CAPI_EXPORTED MlirAttribute
 mlirSparseElementsAttrGetValues(MlirAttribute attr);
 
+//===----------------------------------------------------------------------===//
+// Strided layout attribute.
+//===----------------------------------------------------------------------===//
+
+// Checks wheather the given attribute is a strided layout attribute.
+MLIR_CAPI_EXPORTED bool mlirAttributeIsAStridedLayout(MlirAttribute attr);
+
+// Creates a strided layout attribute from given strides and offset.
+MLIR_CAPI_EXPORTED MlirAttribute mlirStridedLayoutAttrGet(
+    MlirContext ctx, int64_t offset, intptr_t numStrides, int64_t *strides);
+
+// Returns the offset in the given strided layout layout attribute.
+MLIR_CAPI_EXPORTED int64_t mlirStridedLayoutAttrGetOffset(MlirAttribute attr); 
+
+// Returns the number of strides in the given strided layout attribute.
+MLIR_CAPI_EXPORTED intptr_t mlirStridedLayoutAttrGetNumStrides(MlirAttribute attr);
+
+// Returns the pos-th stride stored in the given strided layout attribute.
+MLIR_CAPI_EXPORTED int64_t mlirStridedLayoutAttrGetStride(MlirAttribute attr, intptr_t pos);
+
 #ifdef __cplusplus
 }
 #endif
 
 #endif // MLIR_C_BUILTINATTRIBUTES_H

mlir/lib/CAPI/IR/BuiltinAttributes.cpp

 
 MlirAttribute mlirSparseElementsAttrGetIndices(MlirAttribute attr) {
   return wrap(unwrap(attr).cast<SparseElementsAttr>().getIndices());
 }
 
 MlirAttribute mlirSparseElementsAttrGetValues(MlirAttribute attr) {
   return wrap(unwrap(attr).cast<SparseElementsAttr>().getValues());
 }
+
+//===----------------------------------------------------------------------===//
+// Strided layout attribute.
+//===----------------------------------------------------------------------===//
+
+bool mlirAttributeIsAStridedLayout(MlirAttribute attr) {
+  return unwrap(attr).isa<StridedLayoutAttr>();
+}
+
+MlirAttribute mlirStridedLayoutAttrGet(MlirContext ctx, int64_t offset, intptr_t numStrides, int64_t *strides) {
+  SmallVector<int64_t, 4> stridesVector;
+  return wrap(
+      StridedLayoutAttr::get(
+        unwrap(ctx), offset, ArrayRef<int64_t>(strides, numStrides)));
+}
+
+int64_t mlirStridedLayoutAttrGetOffset(MlirAttribute attr) {
+  return unwrap(attr).cast<StridedLayoutAttr>().getOffset();
+}
+
+intptr_t mlirStridedLayoutAttrGetNumStrides(MlirAttribute attr) {
+  return static_cast<intptr_t>(unwrap(attr).cast<StridedLayoutAttr>().getStrides().size());
+}
+
+int64_t mlirStridedLayoutAttrGetStride(MlirAttribute attr, intptr_t pos) {
+  return unwrap(attr).cast<StridedLayoutAttr>().getStrides()[pos];
+}

mlir/test/CAPI/ir.c

if (mlirDenseBoolArrayGetElement(boolArray, 1) != 1 ||
       mlirDenseI8ArrayGetElement(int8Array, 1) != 1 ||
       mlirDenseI16ArrayGetElement(int16Array, 1) != 1 ||
       mlirDenseI32ArrayGetElement(int32Array, 1) != 1 ||
       mlirDenseI64ArrayGetElement(int64Array, 1) != 1 ||
       fabsf(mlirDenseF32ArrayGetElement(floatArray, 1) - 1.0f) > 1E-6f ||
       fabs(mlirDenseF64ArrayGetElement(doubleArray, 1) - 1.0) > 1E-6)
     return 21;
 
+  int64_t layoutStrides[3] = {5, 7, 13};
+  MlirAttribute stridedLayoutAttr = mlirStridedLayoutAttrGet(ctx, 42, 3, &layoutStrides[0]);
+
+  // CHECK: strided<[5, 7, 13], offset: 42>
+  mlirAttributeDump(stridedLayoutAttr);
+
+  if (mlirStridedLayoutAttrGetOffset(stridedLayoutAttr) != 42 ||
+      mlirStridedLayoutAttrGetNumStrides(stridedLayoutAttr) != 3 ||
+      mlirStridedLayoutAttrGetStride(stridedLayoutAttr, 0) != 5 ||
+      mlirStridedLayoutAttrGetStride(stridedLayoutAttr, 1) != 7 ||
+      mlirStridedLayoutAttrGetStride(stridedLayoutAttr, 2) != 13)
+    return 22;
+
   return 0;
 }
 
 int printAffineMap(MlirContext ctx) {
   MlirAffineMap emptyAffineMap = mlirAffineMapEmptyGet(ctx);
   MlirAffineMap affineMap = mlirAffineMapZeroResultGet(ctx, 3, 2);
   MlirAffineMap constAffineMap = mlirAffineMapConstantGet(ctx, 2);
   MlirAffineMap multiDimIdentityAffineMap =