chore: import upstream snapshot with attribution

test/cpp/cinn/optim/cast_simplify_test.cc

@@ -0,0 +1,62 @@
+// Copyright (c) 2021 CINN Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <gtest/gtest.h>
+
+#include "paddle/cinn/ir/ir_printer.h"
+#include "paddle/cinn/ir/op/ir_operators.h"
+#include "paddle/cinn/optim/ir_simplify.h"
+#include "paddle/cinn/utils/string.h"
+namespace cinn::optim {
+
+TEST(CastSimplify, same_type) {
+  Var n("n");
+  Expr a = ir::Cast::Make(Int(32), n);
+  LOG(INFO) << n->type();
+  LOG(INFO) << a;
+  SimplifyCast(&a);
+  ASSERT_EQ(utils::GetStreamCnt(a), "n");
+}
+
+TEST(CastSimplify, Imm_int) {
+  Expr a = ir::Cast::Make(Int(64), Expr(1));
+  Expr c = ir::Cast::Make(Int(32), a);
+  LOG(INFO) << c;
+  SimplifyCast(&c);
+  LOG(INFO) << c;
+  ASSERT_EQ(utils::GetStreamCnt(c), "1");
+  ASSERT_EQ(c.type(), Int(32));
+}
+
+TEST(CastSimplify, Imm_double) {
+  Expr a = ir::Cast::Make(Float(64), Expr(2.33));
+  Expr c = ir::Cast::Make(Int(32), a);
+  LOG(INFO) << c;
+  SimplifyCast(&c);
+  LOG(INFO) << c;
+  ASSERT_EQ(utils::GetStreamCnt(c), "2");
+  ASSERT_EQ(c.type(), Int(32));
+}
+
+TEST(CastSimplify, Imm_uint) {
+  Expr a = ir::Cast::Make(UInt(64), Expr(1));
+  Expr c = ir::Cast::Make(UInt(32), a);
+  LOG(INFO) << c;
+  SimplifyCast(&c);
+  LOG(INFO) << c;
+  ASSERT_EQ(utils::GetStreamCnt(c), "1");
+  ASSERT_EQ(c.type(), UInt(32));
+}
+
+}  // namespace cinn::optim