llvm-6502/unittests/ADT/SmallBitVectorTest.cpp
Dan Gohman cb89afc965 Add a SmallBitVector class, which mimics BitVector but uses only
a single pointer (PointerIntPair) member. In "small" mode, the
pointer field is reinterpreted as a set of bits. In "large" mode,
the pointer points to a heap-allocated object.

Also, give BitVector empty and swap functions.

And, add some simple unittests for BitVector and SmallBitVector.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92730 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-05 15:04:49 +00:00

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3.3 KiB
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//===- llvm/unittest/ADT/SmallBitVectorTest.cpp - SmallBitVector tests ----===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/SmallBitVector.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
TEST(SmallBitVectorTest, TrivialOperation) {
SmallBitVector Vec;
EXPECT_EQ(0U, Vec.count());
EXPECT_EQ(0U, Vec.size());
EXPECT_FALSE(Vec.any());
EXPECT_TRUE(Vec.none());
EXPECT_TRUE(Vec.empty());
Vec.resize(5, true);
EXPECT_EQ(5U, Vec.count());
EXPECT_EQ(5U, Vec.size());
EXPECT_TRUE(Vec.any());
EXPECT_FALSE(Vec.none());
EXPECT_FALSE(Vec.empty());
Vec.resize(11);
EXPECT_EQ(5U, Vec.count());
EXPECT_EQ(11U, Vec.size());
EXPECT_TRUE(Vec.any());
EXPECT_FALSE(Vec.none());
EXPECT_FALSE(Vec.empty());
SmallBitVector Inv = ~Vec;
EXPECT_EQ(6U, Inv.count());
EXPECT_EQ(11U, Inv.size());
EXPECT_TRUE(Inv.any());
EXPECT_FALSE(Inv.none());
EXPECT_FALSE(Inv.empty());
EXPECT_FALSE(Inv == Vec);
EXPECT_TRUE(Inv != Vec);
Vec = ~Vec;
EXPECT_TRUE(Inv == Vec);
EXPECT_FALSE(Inv != Vec);
// Add some "interesting" data to Vec.
Vec.resize(23, true);
Vec.resize(25, false);
Vec.resize(26, true);
Vec.resize(29, false);
Vec.resize(33, true);
Vec.resize(61, false);
unsigned Count = 0;
for (unsigned i = Vec.find_first(); i != -1u; i = Vec.find_next(i)) {
++Count;
EXPECT_TRUE(Vec[i]);
EXPECT_TRUE(Vec.test(i));
}
EXPECT_EQ(Count, Vec.count());
EXPECT_EQ(Count, 23u);
EXPECT_FALSE(Vec[0]);
EXPECT_TRUE(Vec[32]);
EXPECT_FALSE(Vec[60]);
SmallBitVector Copy = Vec;
SmallBitVector Alt(3, false);
Alt.resize(6, true);
std::swap(Alt, Vec);
EXPECT_TRUE(Copy == Alt);
EXPECT_TRUE(Vec.size() == 6);
EXPECT_TRUE(Vec.count() == 3);
EXPECT_TRUE(Vec.find_first() == 3);
std::swap(Copy, Vec);
// Add some more "interesting" data.
Vec.resize(68, true);
Vec.resize(78, false);
Vec.resize(89, true);
Vec.resize(90, false);
Vec.resize(91, true);
Vec.resize(130, false);
Count = 0;
for (unsigned i = Vec.find_first(); i != -1u; i = Vec.find_next(i)) {
++Count;
EXPECT_TRUE(Vec[i]);
EXPECT_TRUE(Vec.test(i));
}
EXPECT_EQ(Count, Vec.count());
EXPECT_EQ(Count, 42u);
EXPECT_FALSE(Vec[0]);
EXPECT_TRUE(Vec[32]);
EXPECT_FALSE(Vec[60]);
EXPECT_FALSE(Vec[129]);
Vec.flip(60);
EXPECT_TRUE(Vec[60]);
EXPECT_EQ(Count + 1, Vec.count());
Vec.flip(60);
EXPECT_FALSE(Vec[60]);
EXPECT_EQ(Count, Vec.count());
Vec.reset(32);
EXPECT_FALSE(Vec[32]);
EXPECT_EQ(Count - 1, Vec.count());
Vec.set(32);
EXPECT_TRUE(Vec[32]);
EXPECT_EQ(Count, Vec.count());
Vec.flip();
EXPECT_EQ(Vec.size() - Count, Vec.count());
Vec.reset();
EXPECT_EQ(0U, Vec.count());
EXPECT_EQ(130U, Vec.size());
EXPECT_FALSE(Vec.any());
EXPECT_TRUE(Vec.none());
EXPECT_FALSE(Vec.empty());
Inv = ~SmallBitVector();
EXPECT_EQ(0U, Inv.count());
EXPECT_EQ(0U, Inv.size());
EXPECT_FALSE(Inv.any());
EXPECT_TRUE(Inv.none());
EXPECT_TRUE(Inv.empty());
Vec.clear();
EXPECT_EQ(0U, Vec.count());
EXPECT_EQ(0U, Vec.size());
EXPECT_FALSE(Vec.any());
EXPECT_TRUE(Vec.none());
EXPECT_TRUE(Vec.empty());
}
}