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llvm-6502/unittests/ADT/IntervalMapTest.cpp
Jakob Stoklund Olesen 5f456cda98 Disallow overlapping inserts, even when inserting the same value. 
We always disallowed overlapping inserts with different values, and this makes
the insertion code smaller and faster.

If an overwriting insert is needed, it can be added as a separate method that
trims any existing intervals before inserting. The immediate use cases for
IntervalMap don't need this - they only use disjoint insertions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120264 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-28 22:17:11 +00:00

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//===---- ADT/IntervalMapTest.cpp - IntervalMap unit tests ------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/IntervalMap.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
typedef IntervalMap<unsigned, unsigned> UUMap;
typedef IntervalMap<unsigned, unsigned, 4> UU4Map;
// Empty map tests
TEST(IntervalMapTest, EmptyMap) {
UUMap::Allocator allocator;
UUMap map(allocator);
EXPECT_TRUE(map.empty());
// Lookup on empty map.
EXPECT_EQ(0u, map.lookup(0));
EXPECT_EQ(7u, map.lookup(0, 7));
EXPECT_EQ(0u, map.lookup(~0u-1));
EXPECT_EQ(7u, map.lookup(~0u-1, 7));
// Iterators.
EXPECT_TRUE(map.begin() == map.begin());
EXPECT_TRUE(map.begin() == map.end());
EXPECT_TRUE(map.end() == map.end());
EXPECT_FALSE(map.begin() != map.begin());
EXPECT_FALSE(map.begin() != map.end());
EXPECT_FALSE(map.end() != map.end());
EXPECT_FALSE(map.begin().valid());
EXPECT_FALSE(map.end().valid());
UUMap::iterator I = map.begin();
EXPECT_FALSE(I.valid());
EXPECT_TRUE(I == map.end());
// Default constructor and cross-constness compares.
UUMap::const_iterator CI;
CI = map.begin();
EXPECT_TRUE(CI == I);
UUMap::iterator I2;
I2 = map.end();
EXPECT_TRUE(I2 == CI);
}
// Single entry map tests
TEST(IntervalMapTest, SingleEntryMap) {
UUMap::Allocator allocator;
UUMap map(allocator);
map.insert(100, 150, 1);
EXPECT_FALSE(map.empty());
// Lookup around interval.
EXPECT_EQ(0u, map.lookup(0));
EXPECT_EQ(0u, map.lookup(99));
EXPECT_EQ(1u, map.lookup(100));
EXPECT_EQ(1u, map.lookup(101));
EXPECT_EQ(1u, map.lookup(125));
EXPECT_EQ(1u, map.lookup(149));
EXPECT_EQ(1u, map.lookup(150));
EXPECT_EQ(0u, map.lookup(151));
EXPECT_EQ(0u, map.lookup(200));
EXPECT_EQ(0u, map.lookup(~0u-1));
// Iterators.
EXPECT_TRUE(map.begin() == map.begin());
EXPECT_FALSE(map.begin() == map.end());
EXPECT_TRUE(map.end() == map.end());
EXPECT_TRUE(map.begin().valid());
EXPECT_FALSE(map.end().valid());
// Iter deref.
UUMap::iterator I = map.begin();
ASSERT_TRUE(I.valid());
EXPECT_EQ(100u, I.start());
EXPECT_EQ(150u, I.stop());
EXPECT_EQ(1u, I.value());
// Preincrement.
++I;
EXPECT_FALSE(I.valid());
EXPECT_FALSE(I == map.begin());
EXPECT_TRUE(I == map.end());
// PreDecrement.
--I;
ASSERT_TRUE(I.valid());
EXPECT_EQ(100u, I.start());
EXPECT_EQ(150u, I.stop());
EXPECT_EQ(1u, I.value());
EXPECT_TRUE(I == map.begin());
EXPECT_FALSE(I == map.end());
I.erase();
EXPECT_TRUE(map.empty());
EXPECT_EQ(0, std::distance(map.begin(), map.end()));
}
// Flat coalescing tests.
TEST(IntervalMapTest, RootCoalescing) {
UUMap::Allocator allocator;
UUMap map(allocator);
map.insert(100, 150, 1);
// Coalesce from the left.
map.insert(90, 99, 1);
EXPECT_EQ(1, std::distance(map.begin(), map.end()));
EXPECT_EQ(90u, map.start());
EXPECT_EQ(150u, map.stop());
// Coalesce from the right.
map.insert(151, 200, 1);
EXPECT_EQ(1, std::distance(map.begin(), map.end()));
EXPECT_EQ(90u, map.start());
EXPECT_EQ(200u, map.stop());
// Non-coalesce from the left.
map.insert(60, 89, 2);
EXPECT_EQ(2, std::distance(map.begin(), map.end()));
EXPECT_EQ(60u, map.start());
EXPECT_EQ(200u, map.stop());
EXPECT_EQ(2u, map.lookup(89));
EXPECT_EQ(1u, map.lookup(90));
UUMap::iterator I = map.begin();
EXPECT_EQ(60u, I.start());
EXPECT_EQ(89u, I.stop());
EXPECT_EQ(2u, I.value());
++I;
EXPECT_EQ(90u, I.start());
EXPECT_EQ(200u, I.stop());
EXPECT_EQ(1u, I.value());
++I;
EXPECT_FALSE(I.valid());
// Non-coalesce from the right.
map.insert(201, 210, 2);
EXPECT_EQ(3, std::distance(map.begin(), map.end()));
EXPECT_EQ(60u, map.start());
EXPECT_EQ(210u, map.stop());
EXPECT_EQ(2u, map.lookup(201));
EXPECT_EQ(1u, map.lookup(200));
// Erase from the left.
map.begin().erase();
EXPECT_EQ(2, std::distance(map.begin(), map.end()));
EXPECT_EQ(90u, map.start());
EXPECT_EQ(210u, map.stop());
// Erase from the right.
(--map.end()).erase();
EXPECT_EQ(1, std::distance(map.begin(), map.end()));
EXPECT_EQ(90u, map.start());
EXPECT_EQ(200u, map.stop());
}
// Flat multi-coalescing tests.
TEST(IntervalMapTest, RootMultiCoalescing) {
UUMap::Allocator allocator;
UUMap map(allocator);
map.insert(140, 150, 1);
map.insert(160, 170, 1);
map.insert(100, 110, 1);
map.insert(120, 130, 1);
EXPECT_EQ(4, std::distance(map.begin(), map.end()));
EXPECT_EQ(100u, map.start());
EXPECT_EQ(170u, map.stop());
// Verify inserts.
UUMap::iterator I = map.begin();
EXPECT_EQ(100u, I.start());
EXPECT_EQ(110u, I.stop());
++I;
EXPECT_EQ(120u, I.start());
EXPECT_EQ(130u, I.stop());
++I;
EXPECT_EQ(140u, I.start());
EXPECT_EQ(150u, I.stop());
++I;
EXPECT_EQ(160u, I.start());
EXPECT_EQ(170u, I.stop());
++I;
EXPECT_FALSE(I.valid());
// Test advanceTo on flat tree.
I = map.begin();
I.advanceTo(135);
ASSERT_TRUE(I.valid());
EXPECT_EQ(140u, I.start());
EXPECT_EQ(150u, I.stop());
I.advanceTo(145);
ASSERT_TRUE(I.valid());
EXPECT_EQ(140u, I.start());
EXPECT_EQ(150u, I.stop());
// Coalesce left with followers.
// [100;110] [120;130] [140;150] [160;170]
map.insert(111, 115, 1);
I = map.begin();
ASSERT_TRUE(I.valid());
EXPECT_EQ(100u, I.start());
EXPECT_EQ(115u, I.stop());
++I;
ASSERT_TRUE(I.valid());
EXPECT_EQ(120u, I.start());
EXPECT_EQ(130u, I.stop());
++I;
ASSERT_TRUE(I.valid());
EXPECT_EQ(140u, I.start());
EXPECT_EQ(150u, I.stop());
++I;
ASSERT_TRUE(I.valid());
EXPECT_EQ(160u, I.start());
EXPECT_EQ(170u, I.stop());
++I;
EXPECT_FALSE(I.valid());
// Coalesce right with followers.
// [100;115] [120;130] [140;150] [160;170]
map.insert(135, 139, 1);
I = map.begin();
ASSERT_TRUE(I.valid());
EXPECT_EQ(100u, I.start());
EXPECT_EQ(115u, I.stop());
++I;
ASSERT_TRUE(I.valid());
EXPECT_EQ(120u, I.start());
EXPECT_EQ(130u, I.stop());
++I;
ASSERT_TRUE(I.valid());
EXPECT_EQ(135u, I.start());
EXPECT_EQ(150u, I.stop());
++I;
ASSERT_TRUE(I.valid());
EXPECT_EQ(160u, I.start());
EXPECT_EQ(170u, I.stop());
++I;
EXPECT_FALSE(I.valid());
// Coalesce left and right with followers.
// [100;115] [120;130] [135;150] [160;170]
map.insert(131, 134, 1);
I = map.begin();
ASSERT_TRUE(I.valid());
EXPECT_EQ(100u, I.start());
EXPECT_EQ(115u, I.stop());
++I;
ASSERT_TRUE(I.valid());
EXPECT_EQ(120u, I.start());
EXPECT_EQ(150u, I.stop());
++I;
ASSERT_TRUE(I.valid());
EXPECT_EQ(160u, I.start());
EXPECT_EQ(170u, I.stop());
++I;
EXPECT_FALSE(I.valid());
// Test clear() on non-branched map.
map.clear();
EXPECT_TRUE(map.empty());
EXPECT_TRUE(map.begin() == map.end());
}
// Branched, non-coalescing tests.
TEST(IntervalMapTest, Branched) {
UUMap::Allocator allocator;
UUMap map(allocator);
// Insert enough intervals to force a branched tree.
// This creates 9 leaf nodes with 11 elements each, tree height = 1.
for (unsigned i = 1; i < 100; ++i) {
map.insert(10*i, 10*i+5, i);
EXPECT_EQ(10u, map.start());
EXPECT_EQ(10*i+5, map.stop());
}
// Tree limits.
EXPECT_FALSE(map.empty());
EXPECT_EQ(10u, map.start());
EXPECT_EQ(995u, map.stop());
// Tree lookup.
for (unsigned i = 1; i < 100; ++i) {
EXPECT_EQ(0u, map.lookup(10*i-1));
EXPECT_EQ(i, map.lookup(10*i));
EXPECT_EQ(i, map.lookup(10*i+5));
EXPECT_EQ(0u, map.lookup(10*i+6));
}
// Forward iteration.
UUMap::iterator I = map.begin();
for (unsigned i = 1; i < 100; ++i) {
ASSERT_TRUE(I.valid());
EXPECT_EQ(10*i, I.start());
EXPECT_EQ(10*i+5, I.stop());
EXPECT_EQ(i, *I);
++I;
}
EXPECT_FALSE(I.valid());
EXPECT_TRUE(I == map.end());
// Backwards iteration.
for (unsigned i = 99; i; --i) {
--I;
ASSERT_TRUE(I.valid());
EXPECT_EQ(10*i, I.start());
EXPECT_EQ(10*i+5, I.stop());
EXPECT_EQ(i, *I);
}
EXPECT_TRUE(I == map.begin());
// Test advanceTo in same node.
I.advanceTo(20);
ASSERT_TRUE(I.valid());
EXPECT_EQ(20u, I.start());
EXPECT_EQ(25u, I.stop());
// advanceTo another node.
I.advanceTo(200);
ASSERT_TRUE(I.valid());
EXPECT_EQ(200u, I.start());
EXPECT_EQ(205u, I.stop());
// Erase from the front.
I = map.begin();
for (unsigned i = 0; i != 20; ++i) {
I.erase();
EXPECT_TRUE(I == map.begin());
EXPECT_FALSE(map.empty());
EXPECT_EQ(I.start(), map.start());
EXPECT_EQ(995u, map.stop());
}
// Test clear() on branched map.
map.clear();
EXPECT_TRUE(map.empty());
EXPECT_TRUE(map.begin() == map.end());
}
// Branched, high, non-coalescing tests.
TEST(IntervalMapTest, Branched2) {
UU4Map::Allocator allocator;
UU4Map map(allocator);
// Insert enough intervals to force a height >= 2 tree.
for (unsigned i = 1; i < 1000; ++i)
map.insert(10*i, 10*i+5, i);
// Tree limits.
EXPECT_FALSE(map.empty());
EXPECT_EQ(10u, map.start());
EXPECT_EQ(9995u, map.stop());
// Tree lookup.
for (unsigned i = 1; i < 1000; ++i) {
EXPECT_EQ(0u, map.lookup(10*i-1));
EXPECT_EQ(i, map.lookup(10*i));
EXPECT_EQ(i, map.lookup(10*i+5));
EXPECT_EQ(0u, map.lookup(10*i+6));
}
// Forward iteration.
UU4Map::iterator I = map.begin();
for (unsigned i = 1; i < 1000; ++i) {
ASSERT_TRUE(I.valid());
EXPECT_EQ(10*i, I.start());
EXPECT_EQ(10*i+5, I.stop());
EXPECT_EQ(i, *I);
++I;
}
EXPECT_FALSE(I.valid());
EXPECT_TRUE(I == map.end());
// Backwards iteration.
for (unsigned i = 999; i; --i) {
--I;
ASSERT_TRUE(I.valid());
EXPECT_EQ(10*i, I.start());
EXPECT_EQ(10*i+5, I.stop());
EXPECT_EQ(i, *I);
}
EXPECT_TRUE(I == map.begin());
// Test advanceTo in same node.
I.advanceTo(20);
ASSERT_TRUE(I.valid());
EXPECT_EQ(20u, I.start());
EXPECT_EQ(25u, I.stop());
// advanceTo sibling leaf node.
I.advanceTo(200);
ASSERT_TRUE(I.valid());
EXPECT_EQ(200u, I.start());
EXPECT_EQ(205u, I.stop());
// advanceTo further.
I.advanceTo(2000);
ASSERT_TRUE(I.valid());
EXPECT_EQ(2000u, I.start());
EXPECT_EQ(2005u, I.stop());
// Test clear() on branched map.
map.clear();
EXPECT_TRUE(map.empty());
EXPECT_TRUE(map.begin() == map.end());
}
// Random insertions, coalescing to a single interval.
TEST(IntervalMapTest, RandomCoalescing) {
UU4Map::Allocator allocator;
UU4Map map(allocator);
// This is a poor PRNG with maximal period:
// x_n = 5 x_{n-1} + 1 mod 2^N
unsigned x = 100;
for (unsigned i = 0; i != 4096; ++i) {
map.insert(10*x, 10*x+9, 1);
EXPECT_GE(10*x, map.start());
EXPECT_LE(10*x+9, map.stop());
x = (5*x+1)%4096;
}
// Map should be fully coalesced after that exercise.
EXPECT_FALSE(map.empty());
EXPECT_EQ(0u, map.start());
EXPECT_EQ(40959u, map.stop());
EXPECT_EQ(1, std::distance(map.begin(), map.end()));
}
} // namespace
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