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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
//===- AttributorTest.cpp - Attributor unit 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/Transforms/IPO/Attributor.h"
#include "AttributorTestBase.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Analysis/CGSCCPassManager.h"
#include "llvm/Analysis/CallGraphSCCPass.h"
#include "llvm/Analysis/LoopAnalysisManager.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Testing/Support/Error.h"
#include "llvm/Transforms/Utils/CallGraphUpdater.h"
#include "gtest/gtest.h"
#include <memory>
namespace llvm {
TEST_F(AttributorTestBase, IRPPositionCallBaseContext) {
const char *ModuleString = R"(
define i32 @foo(i32 %a) {
entry:
ret i32 %a
}
)";
parseModule(ModuleString);
Function *F = M->getFunction("foo");
IRPosition Pos =
IRPosition::function(*F, (const llvm::CallBase *)(uintptr_t)0xDEADBEEF);
EXPECT_TRUE(Pos.hasCallBaseContext());
EXPECT_FALSE(Pos.stripCallBaseContext().hasCallBaseContext());
}
TEST_F(AttributorTestBase, TestCast) {
const char *ModuleString = R"(
define i32 @foo(i32 %a, i32 %b) {
entry:
%c = add i32 %a, %b
ret i32 %c
}
)";
Module &M = parseModule(ModuleString);
SetVector<Function *> Functions;
AnalysisGetter AG;
for (Function &F : M)
Functions.insert(&F);
CallGraphUpdater CGUpdater;
BumpPtrAllocator Allocator;
InformationCache InfoCache(M, AG, Allocator, nullptr);
Attributor A(Functions, InfoCache, CGUpdater);
Function *F = M.getFunction("foo");
const AbstractAttribute *AA =
&A.getOrCreateAAFor<AAIsDead>(IRPosition::function(*F));
EXPECT_TRUE(AA);
const auto *SFail = dyn_cast<AAAlign>(AA);
const auto *SSucc = dyn_cast<AAIsDead>(AA);
ASSERT_EQ(SFail, nullptr);
ASSERT_TRUE(SSucc);
}
TEST_F(AttributorTestBase, AAReachabilityTest) {
const char *ModuleString = R"(
@x = external global i32
define internal void @func4() {
store i32 0, i32* @x
ret void
}
define internal void @func3() {
store i32 0, i32* @x
ret void
}
define internal void @func8() {
store i32 0, i32* @x
ret void
}
define internal void @func2() {
entry:
call void @func3()
ret void
}
define internal void @func1() {
entry:
call void @func2()
ret void
}
declare void @unknown()
define internal void @func5(void ()* %ptr) {
entry:
call void %ptr()
call void @unknown()
ret void
}
define internal void @func6() {
entry:
call void @func5(void ()* @func3)
ret void
}
define internal void @func7() {
entry:
call void @func2()
call void @func4()
ret void
}
define internal void @func9() {
entry:
call void @func2()
call void @func8()
ret void
}
define void @func10() {
entry:
call void @func9()
call void @func4()
ret void
}
)";
Module &M = parseModule(ModuleString);
SetVector<Function *> Functions;
AnalysisGetter AG;
for (Function &F : M)
Functions.insert(&F);
CallGraphUpdater CGUpdater;
BumpPtrAllocator Allocator;
InformationCache InfoCache(M, AG, Allocator, nullptr);
Attributor A(Functions, InfoCache, CGUpdater, /* Allowed */ nullptr,
/*DeleteFns*/ false);
Function &F1 = *M.getFunction("func1");
Function &F3 = *M.getFunction("func3");
Function &F4 = *M.getFunction("func4");
Function &F6 = *M.getFunction("func6");
Function &F7 = *M.getFunction("func7");
Function &F9 = *M.getFunction("func9");
// call void @func2()
CallBase &F7FirstCB = static_cast<CallBase &>(*F7.getEntryBlock().begin());
// call void @func2()
Instruction &F9FirstInst = *F9.getEntryBlock().begin();
// call void @func8
Instruction &F9SecondInst = *++(F9.getEntryBlock().begin());
const AAFunctionReachability &F1AA =
A.getOrCreateAAFor<AAFunctionReachability>(IRPosition::function(F1));
const AAFunctionReachability &F6AA =
A.getOrCreateAAFor<AAFunctionReachability>(IRPosition::function(F6));
const AAFunctionReachability &F7AA =
A.getOrCreateAAFor<AAFunctionReachability>(IRPosition::function(F7));
const AAFunctionReachability &F9AA =
A.getOrCreateAAFor<AAFunctionReachability>(IRPosition::function(F9));
F1AA.canReach(A, F3);
F1AA.canReach(A, F4);
F6AA.canReach(A, F4);
F7AA.canReach(A, F7FirstCB, F3);
F7AA.canReach(A, F7FirstCB, F4);
F9AA.instructionCanReach(A, F9FirstInst, F3);
F9AA.instructionCanReach(A, F9SecondInst, F3, false);
F9AA.instructionCanReach(A, F9FirstInst, F4);
A.run();
ASSERT_TRUE(F1AA.canReach(A, F3));
ASSERT_FALSE(F1AA.canReach(A, F4));
ASSERT_TRUE(F7AA.canReach(A, F7FirstCB, F3));
ASSERT_FALSE(F7AA.canReach(A, F7FirstCB, F4));
// Assumed to be reacahable, since F6 can reach a function with
// a unknown callee.
ASSERT_TRUE(F6AA.canReach(A, F4));
// The second instruction of F9 can't reach the first call.
ASSERT_FALSE(F9AA.instructionCanReach(A, F9SecondInst, F3, false));
// TODO: Without lifetime limiting callback this query does actually not make
// much sense. "Anything" is reachable from the caller of func10.
ASSERT_TRUE(F9AA.instructionCanReach(A, F9SecondInst, F3, true));
// The first instruction of F9 can reach the first call.
ASSERT_TRUE(F9AA.instructionCanReach(A, F9FirstInst, F3));
// Because func10 calls the func4 after the call to func9 it is reachable.
ASSERT_TRUE(F9AA.instructionCanReach(A, F9FirstInst, F4));
}
} // namespace llvm
|
