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dawn-cmake/src/tint/ast/traverse_expressions_test.cc
Ben Clayton 783b169bf4 tint/ast: Migrate to utils::Vector 
Change-Id: I10dd2feeaeb86a1ee7769d2bfd172e49c2805cb3
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/97843
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
2022-08-02 17:03:35 +00:00

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// 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/ast/traverse_expressions.h"
#include "gmock/gmock.h"
#include "src/tint/ast/test_helper.h"
using ::testing::ElementsAre;
using namespace tint::number_suffixes; // NOLINT
namespace tint::ast {
namespace {
using TraverseExpressionsTest = TestHelper;
TEST_F(TraverseExpressionsTest, DescendIndexAccessor) {
std::vector<const ast::Expression*> e = {Expr(1_i), Expr(1_i), Expr(1_i), Expr(1_i)};
std::vector<const ast::Expression*> i = {IndexAccessor(e[0], e[1]), IndexAccessor(e[2], e[3])};
auto* root = IndexAccessor(i[0], i[1]);
{
std::vector<const ast::Expression*> l2r;
TraverseExpressions<TraverseOrder::LeftToRight>(root, Diagnostics(),
[&](const ast::Expression* expr) {
l2r.push_back(expr);
return ast::TraverseAction::Descend;
});
EXPECT_THAT(l2r, ElementsAre(root, i[0], e[0], e[1], i[1], e[2], e[3]));
}
{
std::vector<const ast::Expression*> r2l;
TraverseExpressions<TraverseOrder::RightToLeft>(root, Diagnostics(),
[&](const ast::Expression* expr) {
r2l.push_back(expr);
return ast::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 ast::Expression*> e = {Expr(1_i), Expr(1_i), Expr(1_i), Expr(1_i)};
std::vector<const ast::Expression*> i = {Add(e[0], e[1]), Sub(e[2], e[3])};
auto* root = Mul(i[0], i[1]);
{
std::vector<const ast::Expression*> l2r;
TraverseExpressions<TraverseOrder::LeftToRight>(root, Diagnostics(),
[&](const ast::Expression* expr) {
l2r.push_back(expr);
return ast::TraverseAction::Descend;
});
EXPECT_THAT(l2r, ElementsAre(root, i[0], e[0], e[1], i[1], e[2], e[3]));
}
{
std::vector<const ast::Expression*> r2l;
TraverseExpressions<TraverseOrder::RightToLeft>(root, Diagnostics(),
[&](const ast::Expression* expr) {
r2l.push_back(expr);
return ast::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 ast::Expression*> e = {Expr(1_i), Expr(1_i), Expr(1_i), Expr(1_i)};
std::vector<const ast::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, Diagnostics(), [&](const ast::Expression* expr, size_t depth) {
(void)expr;
EXPECT_THAT(depth, depths[j++]);
return ast::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);
{
utils::Vector<const ast::Expression*, 8> l2r;
TraverseExpressions<TraverseOrder::LeftToRight>(root, Diagnostics(),
[&](const ast::Expression* expr) {
l2r.Push(expr);
return ast::TraverseAction::Descend;
});
EXPECT_THAT(l2r, ElementsAre(root, b2, b1, b0, e));
}
{
utils::Vector<const ast::Expression*, 8> r2l;
TraverseExpressions<TraverseOrder::RightToLeft>(root, Diagnostics(),
[&](const ast::Expression* expr) {
r2l.Push(expr);
return ast::TraverseAction::Descend;
});
EXPECT_THAT(r2l, ElementsAre(root, b2, b1, b0, e));
}
}
TEST_F(TraverseExpressionsTest, DescendCallExpression) {
utils::Vector e{Expr(1_i), Expr(1_i), Expr(1_i), Expr(1_i)};
utils::Vector c{Call("a", e[0], e[1]), Call("b", e[2], e[3])};
auto* root = Call("c", c[0], c[1]);
{
utils::Vector<const ast::Expression*, 8> l2r;
TraverseExpressions<TraverseOrder::LeftToRight>(root, Diagnostics(),
[&](const ast::Expression* expr) {
l2r.Push(expr);
return ast::TraverseAction::Descend;
});
EXPECT_THAT(l2r, ElementsAre(root, c[0], e[0], e[1], c[1], e[2], e[3]));
}
{
utils::Vector<const ast::Expression*, 8> r2l;
TraverseExpressions<TraverseOrder::RightToLeft>(root, Diagnostics(),
[&](const ast::Expression* expr) {
r2l.Push(expr);
return ast::TraverseAction::Descend;
});
EXPECT_THAT(r2l, ElementsAre(root, c[1], e[3], e[2], c[0], e[1], e[0]));
}
}
// TODO(crbug.com/tint/1257): Test ignores member accessor 'member' field.
// Replace with the test below when fixed.
TEST_F(TraverseExpressionsTest, DescendMemberIndexExpression) {
auto* e = Expr(1_i);
auto* m = MemberAccessor(e, Expr("a"));
auto* root = MemberAccessor(m, Expr("b"));
{
std::vector<const ast::Expression*> l2r;
TraverseExpressions<TraverseOrder::LeftToRight>(root, Diagnostics(),
[&](const ast::Expression* expr) {
l2r.push_back(expr);
return ast::TraverseAction::Descend;
});
EXPECT_THAT(l2r, ElementsAre(root, m, e));
}
{
std::vector<const ast::Expression*> r2l;
TraverseExpressions<TraverseOrder::RightToLeft>(root, Diagnostics(),
[&](const ast::Expression* expr) {
r2l.push_back(expr);
return ast::TraverseAction::Descend;
});
EXPECT_THAT(r2l, ElementsAre(root, m, e));
}
}
// TODO(crbug.com/tint/1257): The correct test for DescendMemberIndexExpression.
TEST_F(TraverseExpressionsTest, DISABLED_DescendMemberIndexExpression) {
auto* e = Expr(1_i);
std::vector<const ast::IdentifierExpression*> i = {Expr("a"), Expr("b")};
auto* m = MemberAccessor(e, i[0]);
auto* root = MemberAccessor(m, i[1]);
{
std::vector<const ast::Expression*> l2r;
TraverseExpressions<TraverseOrder::LeftToRight>(root, Diagnostics(),
[&](const ast::Expression* expr) {
l2r.push_back(expr);
return ast::TraverseAction::Descend;
});
EXPECT_THAT(l2r, ElementsAre(root, m, e, i[0], i[1]));
}
{
std::vector<const ast::Expression*> r2l;
TraverseExpressions<TraverseOrder::RightToLeft>(root, Diagnostics(),
[&](const ast::Expression* expr) {
r2l.push_back(expr);
return ast::TraverseAction::Descend;
});
EXPECT_THAT(r2l, ElementsAre(root, i[1], m, i[0], e));
}
}
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 ast::Expression*> l2r;
TraverseExpressions<TraverseOrder::LeftToRight>(root, Diagnostics(),
[&](const ast::Expression* expr) {
l2r.push_back(expr);
return ast::TraverseAction::Descend;
});
EXPECT_THAT(l2r, ElementsAre(root, u2, u1, u0, e));
}
{
std::vector<const ast::Expression*> r2l;
TraverseExpressions<TraverseOrder::RightToLeft>(root, Diagnostics(),
[&](const ast::Expression* expr) {
r2l.push_back(expr);
return ast::TraverseAction::Descend;
});
EXPECT_THAT(r2l, ElementsAre(root, u2, u1, u0, e));
}
}
TEST_F(TraverseExpressionsTest, Skip) {
std::vector<const ast::Expression*> e = {Expr(1_i), Expr(1_i), Expr(1_i), Expr(1_i)};
std::vector<const ast::Expression*> i = {IndexAccessor(e[0], e[1]), IndexAccessor(e[2], e[3])};
auto* root = IndexAccessor(i[0], i[1]);
std::vector<const ast::Expression*> order;
TraverseExpressions<TraverseOrder::LeftToRight>(
root, Diagnostics(), [&](const ast::Expression* expr) {
order.push_back(expr);
return expr == i[0] ? ast::TraverseAction::Skip : ast::TraverseAction::Descend;
});
EXPECT_THAT(order, ElementsAre(root, i[0], i[1], e[2], e[3]));
}
TEST_F(TraverseExpressionsTest, Stop) {
std::vector<const ast::Expression*> e = {Expr(1_i), Expr(1_i), Expr(1_i), Expr(1_i)};
std::vector<const ast::Expression*> i = {IndexAccessor(e[0], e[1]), IndexAccessor(e[2], e[3])};
auto* root = IndexAccessor(i[0], i[1]);
std::vector<const ast::Expression*> order;
TraverseExpressions<TraverseOrder::LeftToRight>(
root, Diagnostics(), [&](const ast::Expression* expr) {
order.push_back(expr);
return expr == i[0] ? ast::TraverseAction::Stop : ast::TraverseAction::Descend;
});
EXPECT_THAT(order, ElementsAre(root, i[0]));
}
} // namespace
} // namespace tint::ast
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