1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
//===- BitstreamReaderTest.cpp - Tests for BitstreamReader ----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/Bitcode/BitstreamReader.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Bitcode/BitstreamWriter.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
TEST(BitstreamReaderTest, AtEndOfStream) {
uint8_t Bytes[4] = {
0x00, 0x01, 0x02, 0x03
};
BitstreamCursor Cursor(Bytes);
EXPECT_FALSE(Cursor.AtEndOfStream());
(void)Cursor.Read(8);
EXPECT_FALSE(Cursor.AtEndOfStream());
(void)Cursor.Read(24);
EXPECT_TRUE(Cursor.AtEndOfStream());
Cursor.JumpToBit(0);
EXPECT_FALSE(Cursor.AtEndOfStream());
Cursor.JumpToBit(32);
EXPECT_TRUE(Cursor.AtEndOfStream());
}
TEST(BitstreamReaderTest, AtEndOfStreamJump) {
uint8_t Bytes[4] = {
0x00, 0x01, 0x02, 0x03
};
BitstreamCursor Cursor(Bytes);
Cursor.JumpToBit(32);
EXPECT_TRUE(Cursor.AtEndOfStream());
}
TEST(BitstreamReaderTest, AtEndOfStreamEmpty) {
BitstreamCursor Cursor(ArrayRef<uint8_t>{});
EXPECT_TRUE(Cursor.AtEndOfStream());
}
TEST(BitstreamReaderTest, getCurrentByteNo) {
uint8_t Bytes[] = {0x00, 0x01, 0x02, 0x03};
SimpleBitstreamCursor Cursor(Bytes);
for (unsigned I = 0, E = 32; I != E; ++I) {
EXPECT_EQ(I / 8, Cursor.getCurrentByteNo());
(void)Cursor.Read(1);
}
EXPECT_EQ(4u, Cursor.getCurrentByteNo());
}
TEST(BitstreamReaderTest, getPointerToByte) {
uint8_t Bytes[] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};
SimpleBitstreamCursor Cursor(Bytes);
for (unsigned I = 0, E = 8; I != E; ++I) {
EXPECT_EQ(Bytes + I, Cursor.getPointerToByte(I, 1));
}
}
TEST(BitstreamReaderTest, getPointerToBit) {
uint8_t Bytes[] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};
SimpleBitstreamCursor Cursor(Bytes);
for (unsigned I = 0, E = 8; I != E; ++I) {
EXPECT_EQ(Bytes + I, Cursor.getPointerToBit(I * 8, 1));
}
}
TEST(BitstreamReaderTest, readRecordWithBlobWhileStreaming) {
SmallVector<uint8_t, 1> BlobData;
for (unsigned I = 0, E = 1024; I != E; ++I)
BlobData.push_back(I);
// Try a bunch of different sizes.
const unsigned Magic = 0x12345678;
const unsigned BlockID = bitc::FIRST_APPLICATION_BLOCKID;
const unsigned RecordID = 1;
for (unsigned I = 0, BlobSize = 0, E = BlobData.size(); BlobSize < E;
BlobSize += ++I) {
StringRef BlobIn((const char *)BlobData.begin(), BlobSize);
// Write the bitcode.
SmallVector<char, 1> Buffer;
unsigned AbbrevID;
{
BitstreamWriter Stream(Buffer);
Stream.Emit(Magic, 32);
Stream.EnterSubblock(BlockID, 3);
auto Abbrev = std::make_shared<BitCodeAbbrev>();
Abbrev->Add(BitCodeAbbrevOp(RecordID));
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
AbbrevID = Stream.EmitAbbrev(std::move(Abbrev));
unsigned Record[] = {RecordID};
Stream.EmitRecordWithBlob(AbbrevID, makeArrayRef(Record), BlobIn);
Stream.ExitBlock();
}
// Stream the buffer into the reader.
BitstreamCursor Stream(
ArrayRef<uint8_t>((const uint8_t *)Buffer.begin(), Buffer.size()));
// Header. Included in test so that we can run llvm-bcanalyzer to debug
// when there are problems.
ASSERT_EQ(Magic, Stream.Read(32));
// Block.
BitstreamEntry Entry =
Stream.advance(BitstreamCursor::AF_DontAutoprocessAbbrevs);
ASSERT_EQ(BitstreamEntry::SubBlock, Entry.Kind);
ASSERT_EQ(BlockID, Entry.ID);
ASSERT_FALSE(Stream.EnterSubBlock(BlockID));
// Abbreviation.
Entry = Stream.advance();
ASSERT_EQ(BitstreamEntry::Record, Entry.Kind);
ASSERT_EQ(AbbrevID, Entry.ID);
// Record.
StringRef BlobOut;
SmallVector<uint64_t, 1> Record;
ASSERT_EQ(RecordID, Stream.readRecord(Entry.ID, Record, &BlobOut));
EXPECT_TRUE(Record.empty());
EXPECT_EQ(BlobIn, BlobOut);
}
}
TEST(BitstreamReaderTest, shortRead) {
uint8_t Bytes[] = {8, 7, 6, 5, 4, 3, 2, 1};
for (unsigned I = 1; I != 8; ++I) {
SimpleBitstreamCursor Cursor(ArrayRef<uint8_t>(Bytes, I));
EXPECT_EQ(8ull, Cursor.Read(8));
}
}
} // end anonymous namespace
|
