| // Copyright 2021 The Tint Authors. |
| // |
| // 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 "src/tint/lang/wgsl/ast/traverse_expressions.h" |
| #include "gmock/gmock.h" |
| #include "src/tint/lang/wgsl/ast/helper_test.h" |
| |
| using ::testing::ElementsAre; |
| |
| using namespace tint::number_suffixes; // NOLINT |
| |
| namespace tint::ast { |
| namespace { |
| |
| using TraverseExpressionsTest = TestHelper; |
| |
| TEST_F(TraverseExpressionsTest, DescendIndexAccessor) { |
| std::vector<const Expression*> e = {Expr(1_i), Expr(1_i), Expr(1_i), Expr(1_i)}; |
| std::vector<const Expression*> i = {IndexAccessor(e[0], e[1]), IndexAccessor(e[2], e[3])}; |
| auto* root = IndexAccessor(i[0], i[1]); |
| { |
| std::vector<const Expression*> l2r; |
| TraverseExpressions<TraverseOrder::LeftToRight>(root, [&](const Expression* expr) { |
| l2r.push_back(expr); |
| return TraverseAction::Descend; |
| }); |
| EXPECT_THAT(l2r, ElementsAre(root, i[0], e[0], e[1], i[1], e[2], e[3])); |
| } |
| { |
| std::vector<const Expression*> r2l; |
| TraverseExpressions<TraverseOrder::RightToLeft>(root, [&](const Expression* expr) { |
| r2l.push_back(expr); |
| return TraverseAction::Descend; |
| }); |
| EXPECT_THAT(r2l, ElementsAre(root, i[1], e[3], e[2], i[0], e[1], e[0])); |
| } |
| } |
| |
| TEST_F(TraverseExpressionsTest, DescendBinaryExpression) { |
| std::vector<const Expression*> e = {Expr(1_i), Expr(1_i), Expr(1_i), Expr(1_i)}; |
| std::vector<const Expression*> i = {Add(e[0], e[1]), Sub(e[2], e[3])}; |
| auto* root = Mul(i[0], i[1]); |
| { |
| std::vector<const Expression*> l2r; |
| TraverseExpressions<TraverseOrder::LeftToRight>(root, [&](const Expression* expr) { |
| l2r.push_back(expr); |
| return TraverseAction::Descend; |
| }); |
| EXPECT_THAT(l2r, ElementsAre(root, i[0], e[0], e[1], i[1], e[2], e[3])); |
| } |
| { |
| std::vector<const Expression*> r2l; |
| TraverseExpressions<TraverseOrder::RightToLeft>(root, [&](const Expression* expr) { |
| r2l.push_back(expr); |
| return TraverseAction::Descend; |
| }); |
| EXPECT_THAT(r2l, ElementsAre(root, i[1], e[3], e[2], i[0], e[1], e[0])); |
| } |
| } |
| |
| TEST_F(TraverseExpressionsTest, Depth) { |
| std::vector<const Expression*> e = {Expr(1_i), Expr(1_i), Expr(1_i), Expr(1_i)}; |
| std::vector<const Expression*> i = {Add(e[0], e[1]), Sub(e[2], e[3])}; |
| auto* root = Mul(i[0], i[1]); |
| |
| size_t j = 0; |
| size_t depths[] = {0, 1, 2, 2, 1, 2, 2}; |
| { |
| TraverseExpressions<TraverseOrder::LeftToRight>( // |
| root, [&](const Expression* expr, size_t depth) { |
| (void)expr; |
| EXPECT_THAT(depth, depths[j++]); |
| return TraverseAction::Descend; |
| }); |
| } |
| } |
| |
| TEST_F(TraverseExpressionsTest, DescendBitcastExpression) { |
| auto* e = Expr(1_i); |
| auto* b0 = Bitcast<i32>(e); |
| auto* b1 = Bitcast<i32>(b0); |
| auto* b2 = Bitcast<i32>(b1); |
| auto* root = Bitcast<i32>(b2); |
| { |
| Vector<const Expression*, 8> l2r; |
| TraverseExpressions<TraverseOrder::LeftToRight>(root, [&](const Expression* expr) { |
| l2r.Push(expr); |
| return TraverseAction::Descend; |
| }); |
| EXPECT_THAT(l2r, ElementsAre(root, b2, b1, b0, e)); |
| } |
| { |
| Vector<const Expression*, 8> r2l; |
| TraverseExpressions<TraverseOrder::RightToLeft>(root, [&](const Expression* expr) { |
| r2l.Push(expr); |
| return TraverseAction::Descend; |
| }); |
| EXPECT_THAT(r2l, ElementsAre(root, b2, b1, b0, e)); |
| } |
| } |
| |
| TEST_F(TraverseExpressionsTest, DescendCallExpression) { |
| tint::Vector e{Expr(1_i), Expr(1_i), Expr(1_i), Expr(1_i)}; |
| tint::Vector c{Call("a", e[0], e[1]), Call("b", e[2], e[3])}; |
| auto* root = Call("c", c[0], c[1]); |
| { |
| Vector<const Expression*, 8> l2r; |
| TraverseExpressions<TraverseOrder::LeftToRight>(root, [&](const Expression* expr) { |
| l2r.Push(expr); |
| return TraverseAction::Descend; |
| }); |
| EXPECT_THAT(l2r, ElementsAre(root, c[0], e[0], e[1], c[1], e[2], e[3])); |
| } |
| { |
| Vector<const Expression*, 8> r2l; |
| TraverseExpressions<TraverseOrder::RightToLeft>(root, [&](const Expression* expr) { |
| r2l.Push(expr); |
| return TraverseAction::Descend; |
| }); |
| EXPECT_THAT(r2l, ElementsAre(root, c[1], e[3], e[2], c[0], e[1], e[0])); |
| } |
| } |
| |
| TEST_F(TraverseExpressionsTest, DescendMemberAccessorExpression) { |
| auto* e = Expr(1_i); |
| auto* m = MemberAccessor(e, "a"); |
| auto* root = MemberAccessor(m, "b"); |
| { |
| std::vector<const Expression*> l2r; |
| TraverseExpressions<TraverseOrder::LeftToRight>(root, [&](const Expression* expr) { |
| l2r.push_back(expr); |
| return TraverseAction::Descend; |
| }); |
| EXPECT_THAT(l2r, ElementsAre(root, m, e)); |
| } |
| { |
| std::vector<const Expression*> r2l; |
| TraverseExpressions<TraverseOrder::RightToLeft>(root, [&](const Expression* expr) { |
| r2l.push_back(expr); |
| return TraverseAction::Descend; |
| }); |
| EXPECT_THAT(r2l, ElementsAre(root, m, e)); |
| } |
| } |
| |
| TEST_F(TraverseExpressionsTest, DescendMemberIndexExpression) { |
| auto* a = Expr("a"); |
| auto* b = Expr("b"); |
| auto* c = IndexAccessor(a, b); |
| auto* d = Expr("d"); |
| auto* e = Expr("e"); |
| auto* f = IndexAccessor(d, e); |
| auto* root = IndexAccessor(c, f); |
| { |
| std::vector<const Expression*> l2r; |
| TraverseExpressions<TraverseOrder::LeftToRight>(root, [&](const Expression* expr) { |
| l2r.push_back(expr); |
| return TraverseAction::Descend; |
| }); |
| EXPECT_THAT(l2r, ElementsAre(root, c, a, b, f, d, e)); |
| } |
| { |
| std::vector<const Expression*> r2l; |
| TraverseExpressions<TraverseOrder::RightToLeft>(root, [&](const Expression* expr) { |
| r2l.push_back(expr); |
| return TraverseAction::Descend; |
| }); |
| EXPECT_THAT(r2l, ElementsAre(root, f, e, d, c, b, a)); |
| } |
| } |
| |
| TEST_F(TraverseExpressionsTest, DescendUnaryExpression) { |
| auto* e = Expr(1_i); |
| auto* u0 = AddressOf(e); |
| auto* u1 = Deref(u0); |
| auto* u2 = AddressOf(u1); |
| auto* root = Deref(u2); |
| { |
| std::vector<const Expression*> l2r; |
| TraverseExpressions<TraverseOrder::LeftToRight>(root, [&](const Expression* expr) { |
| l2r.push_back(expr); |
| return TraverseAction::Descend; |
| }); |
| EXPECT_THAT(l2r, ElementsAre(root, u2, u1, u0, e)); |
| } |
| { |
| std::vector<const Expression*> r2l; |
| TraverseExpressions<TraverseOrder::RightToLeft>(root, [&](const Expression* expr) { |
| r2l.push_back(expr); |
| return TraverseAction::Descend; |
| }); |
| EXPECT_THAT(r2l, ElementsAre(root, u2, u1, u0, e)); |
| } |
| } |
| |
| TEST_F(TraverseExpressionsTest, Skip) { |
| std::vector<const Expression*> e = {Expr(1_i), Expr(1_i), Expr(1_i), Expr(1_i)}; |
| std::vector<const Expression*> i = {IndexAccessor(e[0], e[1]), IndexAccessor(e[2], e[3])}; |
| auto* root = IndexAccessor(i[0], i[1]); |
| std::vector<const Expression*> order; |
| TraverseExpressions<TraverseOrder::LeftToRight>(root, [&](const Expression* expr) { |
| order.push_back(expr); |
| return expr == i[0] ? TraverseAction::Skip : TraverseAction::Descend; |
| }); |
| EXPECT_THAT(order, ElementsAre(root, i[0], i[1], e[2], e[3])); |
| } |
| |
| TEST_F(TraverseExpressionsTest, Stop) { |
| std::vector<const Expression*> e = {Expr(1_i), Expr(1_i), Expr(1_i), Expr(1_i)}; |
| std::vector<const Expression*> i = {IndexAccessor(e[0], e[1]), IndexAccessor(e[2], e[3])}; |
| auto* root = IndexAccessor(i[0], i[1]); |
| std::vector<const Expression*> order; |
| TraverseExpressions<TraverseOrder::LeftToRight>(root, [&](const Expression* expr) { |
| order.push_back(expr); |
| return expr == i[0] ? TraverseAction::Stop : TraverseAction::Descend; |
| }); |
| EXPECT_THAT(order, ElementsAre(root, i[0])); |
| } |
| |
| } // namespace |
| } // namespace tint::ast |