1 files changed, 138 insertions, 0 deletions
diff --git a/mlir/unittests/IR/AttributeTest.cpp b/mlir/unittests/IR/AttributeTest.cpp
new file mode 100644
index 00000000000..5a1750e1123
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+++ b/mlir/unittests/IR/AttributeTest.cpp
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+//===- AttributeTest.cpp - Attribute unit tests ---------------------------===//
+//
+// Part of the MLIR 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/IR/Attributes.h"
+#include "mlir/IR/StandardTypes.h"
+#include "gtest/gtest.h"
+
+using namespace mlir;
+using namespace mlir::detail;
+
+template <typename EltTy>
+static void testSplat(Type eltType, const EltTy &splatElt) {
+  VectorType shape = VectorType::get({2, 1}, eltType);
+
+  // Check that the generated splat is the same for 1 element and N elements.
+  DenseElementsAttr splat = DenseElementsAttr::get(shape, splatElt);
+  EXPECT_TRUE(splat.isSplat());
+
+  auto detectedSplat =
+      DenseElementsAttr::get(shape, llvm::makeArrayRef({splatElt, splatElt}));
+  EXPECT_EQ(detectedSplat, splat);
+}
+
+namespace {
+TEST(DenseSplatTest, BoolSplat) {
+  MLIRContext context;
+  IntegerType boolTy = IntegerType::get(1, &context);
+  VectorType shape = VectorType::get({2, 2}, boolTy);
+
+  // Check that splat is automatically detected for boolean values.
+  /// True.
+  DenseElementsAttr trueSplat = DenseElementsAttr::get(shape, true);
+  EXPECT_TRUE(trueSplat.isSplat());
+  /// False.
+  DenseElementsAttr falseSplat = DenseElementsAttr::get(shape, false);
+  EXPECT_TRUE(falseSplat.isSplat());
+  EXPECT_NE(falseSplat, trueSplat);
+
+  /// Detect and handle splat within 8 elements (bool values are bit-packed).
+  /// True.
+  auto detectedSplat = DenseElementsAttr::get(shape, {true, true, true, true});
+  EXPECT_EQ(detectedSplat, trueSplat);
+  /// False.
+  detectedSplat = DenseElementsAttr::get(shape, {false, false, false, false});
+  EXPECT_EQ(detectedSplat, falseSplat);
+}
+
+TEST(DenseSplatTest, LargeBoolSplat) {
+  constexpr int64_t boolCount = 56;
+
+  MLIRContext context;
+  IntegerType boolTy = IntegerType::get(1, &context);
+  VectorType shape = VectorType::get({boolCount}, boolTy);
+
+  // Check that splat is automatically detected for boolean values.
+  /// True.
+  DenseElementsAttr trueSplat = DenseElementsAttr::get(shape, true);
+  DenseElementsAttr falseSplat = DenseElementsAttr::get(shape, false);
+  EXPECT_TRUE(trueSplat.isSplat());
+  EXPECT_TRUE(falseSplat.isSplat());
+
+  /// Detect that the large boolean arrays are properly splatted.
+  /// True.
+  SmallVector<bool, 64> trueValues(boolCount, true);
+  auto detectedSplat = DenseElementsAttr::get(shape, trueValues);
+  EXPECT_EQ(detectedSplat, trueSplat);
+  /// False.
+  SmallVector<bool, 64> falseValues(boolCount, false);
+  detectedSplat = DenseElementsAttr::get(shape, falseValues);
+  EXPECT_EQ(detectedSplat, falseSplat);
+}
+
+TEST(DenseSplatTest, BoolNonSplat) {
+  MLIRContext context;
+  IntegerType boolTy = IntegerType::get(1, &context);
+  VectorType shape = VectorType::get({6}, boolTy);
+
+  // Check that we properly handle non-splat values.
+  DenseElementsAttr nonSplat =
+      DenseElementsAttr::get(shape, {false, false, true, false, false, true});
+  EXPECT_FALSE(nonSplat.isSplat());
+}
+
+TEST(DenseSplatTest, OddIntSplat) {
+  // Test detecting a splat with an odd(non 8-bit) integer bitwidth.
+  MLIRContext context;
+  constexpr size_t intWidth = 19;
+  IntegerType intTy = IntegerType::get(intWidth, &context);
+  APInt value(intWidth, 10);
+
+  testSplat(intTy, value);
+}
+
+TEST(DenseSplatTest, Int32Splat) {
+  MLIRContext context;
+  IntegerType intTy = IntegerType::get(32, &context);
+  int value = 64;
+
+  testSplat(intTy, value);
+}
+
+TEST(DenseSplatTest, IntAttrSplat) {
+  MLIRContext context;
+  IntegerType intTy = IntegerType::get(85, &context);
+  Attribute value = IntegerAttr::get(intTy, 109);
+
+  testSplat(intTy, value);
+}
+
+TEST(DenseSplatTest, F32Splat) {
+  MLIRContext context;
+  FloatType floatTy = FloatType::getF32(&context);
+  float value = 10.0;
+
+  testSplat(floatTy, value);
+}
+
+TEST(DenseSplatTest, F64Splat) {
+  MLIRContext context;
+  FloatType floatTy = FloatType::getF64(&context);
+  double value = 10.0;
+
+  testSplat(floatTy, APFloat(value));
+}
+
+TEST(DenseSplatTest, FloatAttrSplat) {
+  MLIRContext context;
+  FloatType floatTy = FloatType::getBF16(&context);
+  Attribute value = FloatAttr::get(floatTy, 10.0);
+
+  testSplat(floatTy, value);
+}
+} // end namespace