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//===- ConstantRangeListTest.cpp - ConstantRangeList tests ----------------===//
//
// Part of the LLVM 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 "llvm/IR/ConstantRangeList.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
using ConstantRangeListTest = ::testing::Test;
TEST_F(ConstantRangeListTest, Basics) {
ConstantRangeList CRL1a;
CRL1a.insert(0, 12);
EXPECT_FALSE(CRL1a.empty());
ConstantRangeList CRL1b;
CRL1b.insert(0, 4);
CRL1b.insert(4, 8);
CRL1b.insert(8, 12);
EXPECT_TRUE(CRL1a == CRL1b);
ConstantRangeList CRL1c;
CRL1c.insert(0, 4);
CRL1c.insert(8, 12);
CRL1c.insert(4, 8);
EXPECT_TRUE(CRL1a == CRL1c);
ConstantRangeList CRL2;
CRL2.insert(-4, 0);
CRL2.insert(8, 12);
EXPECT_TRUE(CRL1a != CRL2);
}
TEST_F(ConstantRangeListTest, getConstantRangeList) {
SmallVector<ConstantRange, 2> Empty;
EXPECT_TRUE(ConstantRangeList::getConstantRangeList(Empty).has_value());
SmallVector<ConstantRange, 2> Valid;
Valid.push_back(ConstantRange(APInt(64, 0, true), APInt(64, 4, true)));
Valid.push_back(ConstantRange(APInt(64, 8, true), APInt(64, 12, true)));
EXPECT_TRUE(ConstantRangeList::getConstantRangeList(Valid).has_value());
SmallVector<ConstantRange, 2> Invalid1;
Invalid1.push_back(ConstantRange(APInt(64, 4, true), APInt(64, 0, true)));
EXPECT_EQ(ConstantRangeList::getConstantRangeList(Invalid1), std::nullopt);
SmallVector<ConstantRange, 2> Invalid2;
Invalid2.push_back(ConstantRange(APInt(64, 0, true), APInt(64, 4, true)));
Invalid2.push_back(ConstantRange(APInt(64, 12, true), APInt(64, 8, true)));
EXPECT_EQ(ConstantRangeList::getConstantRangeList(Invalid2), std::nullopt);
SmallVector<ConstantRange, 2> Invalid3;
Invalid3.push_back(ConstantRange(APInt(64, 0, true), APInt(64, 4, true)));
Invalid3.push_back(ConstantRange(APInt(64, 4, true), APInt(64, 8, true)));
EXPECT_EQ(ConstantRangeList::getConstantRangeList(Invalid3), std::nullopt);
SmallVector<ConstantRange, 2> Invalid4;
Invalid4.push_back(ConstantRange(APInt(64, 0, true), APInt(64, 12, true)));
Invalid4.push_back(ConstantRange(APInt(64, 8, true), APInt(64, 16, true)));
EXPECT_EQ(ConstantRangeList::getConstantRangeList(Invalid4), std::nullopt);
}
TEST_F(ConstantRangeListTest, Insert) {
ConstantRangeList CRL;
CRL.insert(0, 4);
CRL.insert(8, 12);
// No overlap, left
CRL.insert(-8, -4);
// No overlap, right
CRL.insert(16, 20);
// No overlap, middle
CRL.insert(13, 15);
// Overlap with left
CRL.insert(-6, -2);
// Overlap with right
CRL.insert(5, 9);
// Overlap with left and right
CRL.insert(14, 18);
// Overlap cross ranges
CRL.insert(2, 14);
// An existing range
CRL.insert(0, 20);
ConstantRangeList Expected;
Expected.insert(-8, -2);
Expected.insert(0, 20);
EXPECT_TRUE(CRL == Expected);
}
ConstantRangeList GetCRL(ArrayRef<std::pair<APInt, APInt>> Pairs) {
SmallVector<ConstantRange, 2> Ranges;
for (auto &[Start, End] : Pairs)
Ranges.push_back(ConstantRange(Start, End));
return ConstantRangeList(Ranges);
}
TEST_F(ConstantRangeListTest, Subtract) {
APInt AP0 = APInt(64, 0, /*isSigned=*/true);
APInt AP2 = APInt(64, 2, /*isSigned=*/true);
APInt AP3 = APInt(64, 3, /*isSigned=*/true);
APInt AP4 = APInt(64, 4, /*isSigned=*/true);
APInt AP8 = APInt(64, 8, /*isSigned=*/true);
APInt AP10 = APInt(64, 10, /*isSigned=*/true);
APInt AP11 = APInt(64, 11, /*isSigned=*/true);
APInt AP12 = APInt(64, 12, /*isSigned=*/true);
ConstantRangeList CRL = GetCRL({{AP0, AP4}, {AP8, AP12}});
// Execute ConstantRangeList::subtract(ConstantRange) and check the result
// is expected. Pass "CRL" by value so that subtract() does not affect the
// argument in caller.
auto SubtractAndCheck = [](ConstantRangeList CRL,
const std::pair<int64_t, int64_t> &Range,
const ConstantRangeList &ExpectedCRL) {
CRL.subtract(ConstantRange(APInt(64, Range.first, /*isSigned=*/true),
APInt(64, Range.second, /*isSigned=*/true)));
EXPECT_EQ(CRL, ExpectedCRL);
};
// No overlap
SubtractAndCheck(CRL, {-4, 0}, CRL);
SubtractAndCheck(CRL, {4, 8}, CRL);
SubtractAndCheck(CRL, {12, 16}, CRL);
// Overlap (left, right, or both)
SubtractAndCheck(CRL, {-4, 2}, GetCRL({{AP2, AP4}, {AP8, AP12}}));
SubtractAndCheck(CRL, {-4, 4}, GetCRL({{AP8, AP12}}));
SubtractAndCheck(CRL, {-4, 8}, GetCRL({{AP8, AP12}}));
SubtractAndCheck(CRL, {0, 2}, GetCRL({{AP2, AP4}, {AP8, AP12}}));
SubtractAndCheck(CRL, {0, 4}, GetCRL({{AP8, AP12}}));
SubtractAndCheck(CRL, {0, 8}, GetCRL({{AP8, AP12}}));
SubtractAndCheck(CRL, {10, 12}, GetCRL({{AP0, AP4}, {AP8, AP10}}));
SubtractAndCheck(CRL, {8, 12}, GetCRL({{AP0, AP4}}));
SubtractAndCheck(CRL, {6, 12}, GetCRL({{AP0, AP4}}));
SubtractAndCheck(CRL, {10, 16}, GetCRL({{AP0, AP4}, {AP8, AP10}}));
SubtractAndCheck(CRL, {8, 16}, GetCRL({{AP0, AP4}}));
SubtractAndCheck(CRL, {6, 16}, GetCRL({{AP0, AP4}}));
SubtractAndCheck(CRL, {2, 10}, GetCRL({{AP0, AP2}, {AP10, AP12}}));
// Subset
SubtractAndCheck(CRL, {2, 3}, GetCRL({{AP0, AP2}, {AP3, AP4}, {AP8, AP12}}));
SubtractAndCheck(CRL, {10, 11},
GetCRL({{AP0, AP4}, {AP8, AP10}, {AP11, AP12}}));
// Superset
SubtractAndCheck(CRL, {0, 12}, GetCRL({}));
SubtractAndCheck(CRL, {-4, 16}, GetCRL({}));
}
TEST_F(ConstantRangeListTest, Union) {
APInt APN4 = APInt(64, -4, /*isSigned=*/true);
APInt APN2 = APInt(64, -2, /*isSigned=*/true);
APInt AP0 = APInt(64, 0, /*isSigned=*/true);
APInt AP2 = APInt(64, 2, /*isSigned=*/true);
APInt AP4 = APInt(64, 4, /*isSigned=*/true);
APInt AP6 = APInt(64, 6, /*isSigned=*/true);
APInt AP7 = APInt(64, 7, /*isSigned=*/true);
APInt AP8 = APInt(64, 8, /*isSigned=*/true);
APInt AP10 = APInt(64, 10, /*isSigned=*/true);
APInt AP11 = APInt(64, 11, /*isSigned=*/true);
APInt AP12 = APInt(64, 12, /*isSigned=*/true);
APInt AP16 = APInt(64, 16, /*isSigned=*/true);
APInt AP18 = APInt(64, 18, /*isSigned=*/true);
ConstantRangeList CRL = GetCRL({{AP0, AP4}, {AP8, AP12}});
// Union with a subset.
ConstantRangeList Empty;
EXPECT_EQ(CRL.unionWith(Empty), CRL);
EXPECT_EQ(Empty.unionWith(CRL), CRL);
EXPECT_EQ(CRL.unionWith(GetCRL({{AP0, AP2}})), CRL);
EXPECT_EQ(CRL.unionWith(GetCRL({{AP10, AP12}})), CRL);
EXPECT_EQ(CRL.unionWith(GetCRL({{AP0, AP2}, {AP8, AP10}})), CRL);
EXPECT_EQ(CRL.unionWith(GetCRL({{AP0, AP2}, {AP10, AP12}})), CRL);
EXPECT_EQ(CRL.unionWith(GetCRL({{AP2, AP4}, {AP8, AP10}})), CRL);
EXPECT_EQ(CRL.unionWith(GetCRL({{AP2, AP4}, {AP10, AP12}})), CRL);
EXPECT_EQ(CRL.unionWith(GetCRL({{AP0, AP4}, {AP8, AP10}, {AP11, AP12}})),
CRL);
EXPECT_EQ(CRL.unionWith(CRL), CRL);
// Union with new ranges.
EXPECT_EQ(CRL.unionWith(GetCRL({{APN4, APN2}})),
GetCRL({{APN4, APN2}, {AP0, AP4}, {AP8, AP12}}));
EXPECT_EQ(CRL.unionWith(GetCRL({{AP6, AP7}})),
GetCRL({{AP0, AP4}, {AP6, AP7}, {AP8, AP12}}));
EXPECT_EQ(CRL.unionWith(GetCRL({{AP16, AP18}})),
GetCRL({{AP0, AP4}, {AP8, AP12}, {AP16, AP18}}));
EXPECT_EQ(CRL.unionWith(GetCRL({{APN2, AP2}})),
GetCRL({{APN2, AP4}, {AP8, AP12}}));
EXPECT_EQ(CRL.unionWith(GetCRL({{AP2, AP6}})),
GetCRL({{AP0, AP6}, {AP8, AP12}}));
EXPECT_EQ(CRL.unionWith(GetCRL({{AP10, AP16}})),
GetCRL({{AP0, AP4}, {AP8, AP16}}));
EXPECT_EQ(CRL.unionWith(GetCRL({{APN2, AP10}})), GetCRL({{APN2, AP12}}));
EXPECT_EQ(CRL.unionWith(GetCRL({{AP2, AP10}})), GetCRL({{AP0, AP12}}));
EXPECT_EQ(CRL.unionWith(GetCRL({{AP4, AP16}})), GetCRL({{AP0, AP16}}));
EXPECT_EQ(CRL.unionWith(GetCRL({{APN2, AP16}})), GetCRL({{APN2, AP16}}));
}
TEST_F(ConstantRangeListTest, Intersect) {
APInt APN2 = APInt(64, -2, /*isSigned=*/true);
APInt AP0 = APInt(64, 0, /*isSigned=*/true);
APInt AP2 = APInt(64, 2, /*isSigned=*/true);
APInt AP4 = APInt(64, 4, /*isSigned=*/true);
APInt AP6 = APInt(64, 6, /*isSigned=*/true);
APInt AP7 = APInt(64, 7, /*isSigned=*/true);
APInt AP8 = APInt(64, 8, /*isSigned=*/true);
APInt AP10 = APInt(64, 10, /*isSigned=*/true);
APInt AP11 = APInt(64, 11, /*isSigned=*/true);
APInt AP12 = APInt(64, 12, /*isSigned=*/true);
APInt AP16 = APInt(64, 16, /*isSigned=*/true);
ConstantRangeList CRL = GetCRL({{AP0, AP4}, {AP8, AP12}});
// No intersection.
ConstantRangeList Empty;
EXPECT_EQ(CRL.intersectWith(Empty), Empty);
EXPECT_EQ(Empty.intersectWith(CRL), Empty);
EXPECT_EQ(CRL.intersectWith(GetCRL({{APN2, AP0}})), Empty);
EXPECT_EQ(CRL.intersectWith(GetCRL({{AP6, AP8}})), Empty);
EXPECT_EQ(CRL.intersectWith(GetCRL({{AP12, AP16}})), Empty);
// Single intersect range.
EXPECT_EQ(CRL.intersectWith(GetCRL({{APN2, AP2}})), GetCRL({{AP0, AP2}}));
EXPECT_EQ(CRL.intersectWith(GetCRL({{APN2, AP6}})), GetCRL({{AP0, AP4}}));
EXPECT_EQ(CRL.intersectWith(GetCRL({{AP2, AP4}})), GetCRL({{AP2, AP4}}));
EXPECT_EQ(CRL.intersectWith(GetCRL({{AP2, AP6}})), GetCRL({{AP2, AP4}}));
EXPECT_EQ(CRL.intersectWith(GetCRL({{AP6, AP10}})), GetCRL({{AP8, AP10}}));
EXPECT_EQ(CRL.intersectWith(GetCRL({{AP6, AP16}})), GetCRL({{AP8, AP12}}));
EXPECT_EQ(CRL.intersectWith(GetCRL({{AP10, AP12}})), GetCRL({{AP10, AP12}}));
EXPECT_EQ(CRL.intersectWith(GetCRL({{AP10, AP16}})), GetCRL({{AP10, AP12}}));
// Multiple intersect ranges.
EXPECT_EQ(CRL.intersectWith(GetCRL({{APN2, AP10}})),
GetCRL({{AP0, AP4}, {AP8, AP10}}));
EXPECT_EQ(CRL.intersectWith(GetCRL({{APN2, AP16}})), CRL);
EXPECT_EQ(CRL.intersectWith(GetCRL({{AP2, AP10}})),
GetCRL({{AP2, AP4}, {AP8, AP10}}));
EXPECT_EQ(CRL.intersectWith(GetCRL({{AP2, AP16}})),
GetCRL({{AP2, AP4}, {AP8, AP12}}));
EXPECT_EQ(CRL.intersectWith(GetCRL({{APN2, AP2}, {AP6, AP10}})),
GetCRL({{AP0, AP2}, {AP8, AP10}}));
EXPECT_EQ(CRL.intersectWith(GetCRL({{AP2, AP6}, {AP10, AP16}})),
GetCRL({{AP2, AP4}, {AP10, AP12}}));
EXPECT_EQ(CRL.intersectWith(GetCRL({{APN2, AP2}, {AP7, AP10}, {AP11, AP16}})),
GetCRL({{AP0, AP2}, {AP8, AP10}, {AP11, AP12}}));
EXPECT_EQ(CRL.intersectWith(CRL), CRL);
}
} // anonymous namespace
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