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/*
* Copyright (C) 2014 The Android Open Source Project
*
* 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 "optimizing_unit_test.h"
#include "ssa_liveness_analysis.h"
#include "utils/arena_allocator.h"
#include "gtest/gtest.h"
namespace art {
TEST(LiveInterval, GetStart) {
ArenaPool pool;
ArenaAllocator allocator(&pool);
{
static constexpr size_t ranges[][2] = {{0, 42}};
LiveInterval* interval = BuildInterval(ranges, arraysize(ranges), &allocator);
ASSERT_EQ(0u, interval->GetStart());
}
{
static constexpr size_t ranges[][2] = {{4, 12}, {14, 16}};
LiveInterval* interval = BuildInterval(ranges, arraysize(ranges), &allocator);
ASSERT_EQ(4u, interval->GetStart());
}
}
TEST(LiveInterval, IsDeadAt) {
ArenaPool pool;
ArenaAllocator allocator(&pool);
{
static constexpr size_t ranges[][2] = {{0, 42}};
LiveInterval* interval = BuildInterval(ranges, arraysize(ranges), &allocator);
ASSERT_TRUE(interval->IsDeadAt(42));
ASSERT_TRUE(interval->IsDeadAt(43));
ASSERT_FALSE(interval->IsDeadAt(41));
ASSERT_FALSE(interval->IsDeadAt(0));
ASSERT_FALSE(interval->IsDeadAt(22));
}
{
static constexpr size_t ranges[][2] = {{4, 12}, {14, 16}};
LiveInterval* interval = BuildInterval(ranges, arraysize(ranges), &allocator);
ASSERT_TRUE(interval->IsDeadAt(16));
ASSERT_TRUE(interval->IsDeadAt(32));
ASSERT_FALSE(interval->IsDeadAt(0));
ASSERT_FALSE(interval->IsDeadAt(4));
ASSERT_FALSE(interval->IsDeadAt(12));
ASSERT_FALSE(interval->IsDeadAt(13));
ASSERT_FALSE(interval->IsDeadAt(14));
ASSERT_FALSE(interval->IsDeadAt(15));
}
}
TEST(LiveInterval, Covers) {
ArenaPool pool;
ArenaAllocator allocator(&pool);
{
static constexpr size_t ranges[][2] = {{0, 42}};
LiveInterval* interval = BuildInterval(ranges, arraysize(ranges), &allocator);
ASSERT_TRUE(interval->Covers(0));
ASSERT_TRUE(interval->Covers(4));
ASSERT_TRUE(interval->Covers(41));
ASSERT_FALSE(interval->Covers(42));
ASSERT_FALSE(interval->Covers(54));
}
{
static constexpr size_t ranges[][2] = {{4, 12}, {14, 16}};
LiveInterval* interval = BuildInterval(ranges, arraysize(ranges), &allocator);
ASSERT_TRUE(interval->Covers(4));
ASSERT_TRUE(interval->Covers(11));
ASSERT_TRUE(interval->Covers(14));
ASSERT_TRUE(interval->Covers(15));
ASSERT_FALSE(interval->Covers(0));
ASSERT_FALSE(interval->Covers(12));
ASSERT_FALSE(interval->Covers(13));
ASSERT_FALSE(interval->Covers(16));
}
}
TEST(LiveInterval, FirstIntersectionWith) {
ArenaPool pool;
ArenaAllocator allocator(&pool);
{
static constexpr size_t ranges1[][2] = {{0, 4}, {8, 10}};
LiveInterval* interval1 = BuildInterval(ranges1, arraysize(ranges1), &allocator);
static constexpr size_t ranges2[][2] = {{5, 6}};
LiveInterval* interval2 = BuildInterval(ranges2, arraysize(ranges2), &allocator);
ASSERT_EQ(kNoLifetime, interval1->FirstIntersectionWith(interval2));
}
{
static constexpr size_t ranges1[][2] = {{0, 4}, {8, 10}};
LiveInterval* interval1 = BuildInterval(ranges1, arraysize(ranges1), &allocator);
static constexpr size_t ranges2[][2] = {{5, 42}};
LiveInterval* interval2 = BuildInterval(ranges2, arraysize(ranges2), &allocator);
ASSERT_EQ(8u, interval1->FirstIntersectionWith(interval2));
}
{
static constexpr size_t ranges1[][2] = {{0, 4}, {8, 10}};
LiveInterval* interval1 = BuildInterval(ranges1, arraysize(ranges1), &allocator);
static constexpr size_t ranges2[][2] = {{5, 6}, {7, 8}, {11, 12}};
LiveInterval* interval2 = BuildInterval(ranges2, arraysize(ranges2), &allocator);
ASSERT_EQ(kNoLifetime, interval1->FirstIntersectionWith(interval2));
}
{
static constexpr size_t ranges1[][2] = {{0, 4}, {8, 10}};
LiveInterval* interval1 = BuildInterval(ranges1, arraysize(ranges1), &allocator);
static constexpr size_t ranges2[][2] = {{5, 6}, {7, 8}, {9, 10}};
LiveInterval* interval2 = BuildInterval(ranges2, arraysize(ranges2), &allocator);
ASSERT_EQ(9u, interval1->FirstIntersectionWith(interval2));
}
{
static constexpr size_t ranges1[][2] = {{0, 1}, {2, 7}, {8, 10}};
LiveInterval* interval1 = BuildInterval(ranges1, arraysize(ranges1), &allocator);
static constexpr size_t ranges2[][2] = {{1, 2}, {6, 7}, {9, 10}};
LiveInterval* interval2 = BuildInterval(ranges2, arraysize(ranges2), &allocator);
ASSERT_EQ(6u, interval1->FirstIntersectionWith(interval2));
}
{
static constexpr size_t ranges1[][2] = {{0, 1}, {2, 8}, {55, 58}};
LiveInterval* interval1 = BuildInterval(ranges1, arraysize(ranges1), &allocator);
static constexpr size_t ranges2[][2] = {{1, 2}, {11, 42}, {43, 48}, {54, 56}};
LiveInterval* interval2 = BuildInterval(ranges2, arraysize(ranges2), &allocator);
ASSERT_EQ(55u, interval1->FirstIntersectionWith(interval2));
}
{
static constexpr size_t ranges1[][2] = {{0, 1}, {2, 8}, {15, 18}, {27, 32}, {41, 53}, {54, 60}};
LiveInterval* interval1 = BuildInterval(ranges1, arraysize(ranges1), &allocator);
static constexpr size_t ranges2[][2] = {{1, 2}, {11, 12}, {19, 25}, {34, 42}, {52, 60}};
LiveInterval* interval2 = BuildInterval(ranges2, arraysize(ranges2), &allocator);
ASSERT_EQ(41u, interval1->FirstIntersectionWith(interval2));
}
}
static bool RangesEquals(LiveInterval* interval,
const size_t expected[][2],
size_t number_of_expected_ranges) {
LiveRange* current = interval->GetFirstRange();
size_t i = 0;
for (;
i < number_of_expected_ranges && current != nullptr;
++i, current = current->GetNext()) {
if (expected[i][0] != current->GetStart()) {
return false;
}
if (expected[i][1] != current->GetEnd()) {
return false;
}
}
if (current != nullptr || i != number_of_expected_ranges) {
return false;
}
return true;
}
TEST(LiveInterval, SplitAt) {
ArenaPool pool;
ArenaAllocator allocator(&pool);
{
// Test within one range.
static constexpr size_t ranges[][2] = {{0, 4}};
LiveInterval* interval = BuildInterval(ranges, arraysize(ranges), &allocator);
LiveInterval* split = interval->SplitAt(1);
static constexpr size_t expected[][2] = {{0, 1}};
ASSERT_TRUE(RangesEquals(interval, expected, arraysize(expected)));
static constexpr size_t expected_split[][2] = {{1, 4}};
ASSERT_TRUE(RangesEquals(split, expected_split, arraysize(expected_split)));
}
{
// Test just before the end of one range.
static constexpr size_t ranges[][2] = {{0, 4}};
LiveInterval* interval = BuildInterval(ranges, arraysize(ranges), &allocator);
LiveInterval* split = interval->SplitAt(3);
static constexpr size_t expected[][2] = {{0, 3}};
ASSERT_TRUE(RangesEquals(interval, expected, arraysize(expected)));
static constexpr size_t expected_split[][2] = {{3, 4}};
ASSERT_TRUE(RangesEquals(split, expected_split, arraysize(expected_split)));
}
{
// Test withing the first range.
static constexpr size_t ranges[][2] = {{0, 4}, {8, 12}};
LiveInterval* interval = BuildInterval(ranges, arraysize(ranges), &allocator);
LiveInterval* split = interval->SplitAt(1);
static constexpr size_t expected[][2] = {{0, 1}};
ASSERT_TRUE(RangesEquals(interval, expected, arraysize(expected)));
static constexpr size_t expected_split[][2] = {{1, 4}, {8, 12}};
ASSERT_TRUE(RangesEquals(split, expected_split, arraysize(expected_split)));
}
{
// Test in a hole.
static constexpr size_t ranges[][2] = {{0, 4}, {8, 12}};
LiveInterval* interval = BuildInterval(ranges, arraysize(ranges), &allocator);
LiveInterval* split = interval->SplitAt(5);
static constexpr size_t expected[][2] = {{0, 4}};
ASSERT_TRUE(RangesEquals(interval, expected, arraysize(expected)));
static constexpr size_t expected_split[][2] = {{8, 12}};
ASSERT_TRUE(RangesEquals(split, expected_split, arraysize(expected_split)));
}
{
// Test withing the second range.
static constexpr size_t ranges[][2] = {{0, 4}, {8, 12}};
LiveInterval* interval = BuildInterval(ranges, arraysize(ranges), &allocator);
LiveInterval* split = interval->SplitAt(9);
static constexpr size_t expected[][2] = {{0, 4}, {8, 9}};
ASSERT_TRUE(RangesEquals(interval, expected, arraysize(expected)));
static constexpr size_t expected_split[][2] = {{9, 12}};
ASSERT_TRUE(RangesEquals(split, expected_split, arraysize(expected_split)));
}
{
// Test at the beginning of the second range.
static constexpr size_t ranges[][2] = {{0, 4}, {6, 10}};
LiveInterval* interval = BuildInterval(ranges, arraysize(ranges), &allocator);
LiveInterval* split = interval->SplitAt(6);
static constexpr size_t expected[][2] = {{0, 4}};
ASSERT_TRUE(RangesEquals(interval, expected, arraysize(expected)));
static constexpr size_t expected_split[][2] = {{6, 10}};
ASSERT_TRUE(RangesEquals(split, expected_split, arraysize(expected_split)));
}
{
// Test at the end of the first range.
static constexpr size_t ranges[][2] = {{0, 4}, {6, 10}};
LiveInterval* interval = BuildInterval(ranges, arraysize(ranges), &allocator);
LiveInterval* split = interval->SplitAt(4);
static constexpr size_t expected[][2] = {{0, 4}};
ASSERT_TRUE(RangesEquals(interval, expected, arraysize(expected)));
static constexpr size_t expected_split[][2] = {{6, 10}};
ASSERT_TRUE(RangesEquals(split, expected_split, arraysize(expected_split)));
}
{
// Test that we get null if we split at a position where the interval is dead.
static constexpr size_t ranges[][2] = {{0, 4}};
LiveInterval* interval = BuildInterval(ranges, arraysize(ranges), &allocator);
LiveInterval* split = interval->SplitAt(5);
ASSERT_TRUE(split == nullptr);
ASSERT_TRUE(RangesEquals(interval, ranges, arraysize(ranges)));
}
}
} // namespace art
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