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
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
|
//===- DebugifyTest.cpp - Debugify 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/ADT/SmallVector.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/IR/DebugInfoMetadata.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Transforms/Utils/Debugify.h"
#include "gtest/gtest.h"
using namespace llvm;
static std::unique_ptr<Module> parseIR(LLVMContext &C, const char *IR) {
SMDiagnostic Err;
std::unique_ptr<Module> Mod = parseAssemblyString(IR, Err, C);
if (!Mod)
Err.print("DebugifyTest", errs());
return Mod;
}
namespace llvm {
void initializeDebugInfoDropPass(PassRegistry &);
void initializeDebugInfoDummyAnalysisPass(PassRegistry &);
namespace {
struct DebugInfoDrop : public FunctionPass {
static char ID;
bool runOnFunction(Function &F) override {
// Drop DISubprogram.
F.setSubprogram(nullptr);
for (BasicBlock &BB : F) {
// Remove debug locations.
for (Instruction &I : BB)
I.setDebugLoc(DebugLoc());
}
return false;
}
void getAnalysisUsage(AnalysisUsage &AU) const override {
AU.setPreservesCFG();
}
DebugInfoDrop() : FunctionPass(ID) {}
};
struct DebugValueDrop : public FunctionPass {
static char ID;
bool runOnFunction(Function &F) override {
SmallVector<DbgVariableIntrinsic *, 4> Dbgs;
for (BasicBlock &BB : F) {
// Remove dbg var intrinsics.
for (Instruction &I : BB) {
if (auto *DVI = dyn_cast<DbgVariableIntrinsic>(&I))
Dbgs.push_back(DVI);
}
}
for (auto &I : Dbgs)
I->eraseFromParent();
return true;
}
void getAnalysisUsage(AnalysisUsage &AU) const override {
AU.setPreservesCFG();
}
DebugValueDrop() : FunctionPass(ID) {}
};
struct DebugInfoDummyAnalysis : public FunctionPass {
static char ID;
bool runOnFunction(Function &F) override {
// Do nothing, so debug info stays untouched.
return false;
}
void getAnalysisUsage(AnalysisUsage &AU) const override {
AU.setPreservesAll();
}
DebugInfoDummyAnalysis() : FunctionPass(ID) {}
};
}
char DebugInfoDrop::ID = 0;
char DebugValueDrop::ID = 0;
char DebugInfoDummyAnalysis::ID = 0;
TEST(DebugInfoDrop, DropOriginalDebugInfo) {
LLVMContext C;
std::unique_ptr<Module> M = parseIR(C, R"(
define i16 @f(i16 %a) !dbg !6 {
%b = add i16 %a, 1, !dbg !11
call void @llvm.dbg.value(metadata i16 %b, metadata !9, metadata !DIExpression()), !dbg !11
ret i16 0, !dbg !11
}
declare void @llvm.dbg.value(metadata, metadata, metadata)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!5}
!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "t.ll", directory: "/")
!2 = !{}
!5 = !{i32 2, !"Debug Info Version", i32 3}
!6 = distinct !DISubprogram(name: "f", linkageName: "f", scope: null, file: !1, line: 1, type: !7, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !8)
!7 = !DISubroutineType(types: !2)
!8 = !{!9}
!9 = !DILocalVariable(name: "b", scope: !6, file: !1, line: 1, type: !10)
!10 = !DIBasicType(name: "ty16", size: 16, encoding: DW_ATE_unsigned)
!11 = !DILocation(line: 1, column: 1, scope: !6)
)");
DebugInfoDrop *P = new DebugInfoDrop();
DebugInfoPerPassMap DIPreservationMap;
DebugifyCustomPassManager Passes;
Passes.setDIPreservationMap(DIPreservationMap);
Passes.add(createDebugifyModulePass(DebugifyMode::OriginalDebugInfo, "",
&(Passes.getDebugInfoPerPassMap())));
Passes.add(P);
Passes.add(createCheckDebugifyModulePass(false, "", nullptr,
DebugifyMode::OriginalDebugInfo,
&(Passes.getDebugInfoPerPassMap())));
testing::internal::CaptureStderr();
Passes.run(*M);
std::string StdOut = testing::internal::GetCapturedStderr();
std::string ErrorForSP = "ERROR: dropped DISubprogram of";
std::string WarningForLoc = "WARNING: dropped DILocation of";
std::string FinalResult = "CheckModuleDebugify (original debuginfo): FAIL";
EXPECT_TRUE(StdOut.find(ErrorForSP) != std::string::npos);
EXPECT_TRUE(StdOut.find(WarningForLoc) != std::string::npos);
EXPECT_TRUE(StdOut.find(FinalResult) != std::string::npos);
}
TEST(DebugValueDrop, DropOriginalDebugValues) {
LLVMContext C;
std::unique_ptr<Module> M = parseIR(C, R"(
define i16 @f(i16 %a) !dbg !6 {
%b = add i16 %a, 1, !dbg !11
call void @llvm.dbg.value(metadata i16 %b, metadata !9, metadata !DIExpression()), !dbg !11
ret i16 0, !dbg !11
}
declare void @llvm.dbg.value(metadata, metadata, metadata)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!5}
!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "t.ll", directory: "/")
!2 = !{}
!5 = !{i32 2, !"Debug Info Version", i32 3}
!6 = distinct !DISubprogram(name: "f", linkageName: "f", scope: null, file: !1, line: 1, type: !7, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !8)
!7 = !DISubroutineType(types: !2)
!8 = !{!9}
!9 = !DILocalVariable(name: "b", scope: !6, file: !1, line: 1, type: !10)
!10 = !DIBasicType(name: "ty16", size: 16, encoding: DW_ATE_unsigned)
!11 = !DILocation(line: 1, column: 1, scope: !6)
)");
DebugValueDrop *P = new DebugValueDrop();
DebugInfoPerPassMap DIPreservationMap;
DebugifyCustomPassManager Passes;
Passes.setDIPreservationMap(DIPreservationMap);
Passes.add(createDebugifyModulePass(DebugifyMode::OriginalDebugInfo, "",
&(Passes.getDebugInfoPerPassMap())));
Passes.add(P);
Passes.add(createCheckDebugifyModulePass(false, "", nullptr,
DebugifyMode::OriginalDebugInfo,
&(Passes.getDebugInfoPerPassMap())));
testing::internal::CaptureStderr();
Passes.run(*M);
std::string StdOut = testing::internal::GetCapturedStderr();
std::string ErrorForSP = "ERROR: dropped DISubprogram of";
std::string WarningForLoc = "WARNING: dropped DILocation of";
std::string WarningForVars = "WARNING: drops dbg.value()/dbg.declare() for";
std::string FinalResult = "CheckModuleDebugify (original debuginfo): FAIL";
EXPECT_TRUE(StdOut.find(ErrorForSP) == std::string::npos);
EXPECT_TRUE(StdOut.find(WarningForLoc) == std::string::npos);
EXPECT_TRUE(StdOut.find(WarningForVars) != std::string::npos);
EXPECT_TRUE(StdOut.find(FinalResult) != std::string::npos);
}
TEST(DebugInfoDummyAnalysis, PreserveOriginalDebugInfo) {
LLVMContext C;
std::unique_ptr<Module> M = parseIR(C, R"(
define i32 @g(i32 %b) !dbg !6 {
%c = add i32 %b, 1, !dbg !11
call void @llvm.dbg.value(metadata i32 %c, metadata !9, metadata !DIExpression()), !dbg !11
ret i32 1, !dbg !11
}
declare void @llvm.dbg.value(metadata, metadata, metadata)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!5}
!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "test.ll", directory: "/")
!2 = !{}
!5 = !{i32 2, !"Debug Info Version", i32 3}
!6 = distinct !DISubprogram(name: "f", linkageName: "f", scope: null, file: !1, line: 1, type: !7, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !8)
!7 = !DISubroutineType(types: !2)
!8 = !{!9}
!9 = !DILocalVariable(name: "c", scope: !6, file: !1, line: 1, type: !10)
!10 = !DIBasicType(name: "ty32", size: 32, encoding: DW_ATE_unsigned)
!11 = !DILocation(line: 1, column: 1, scope: !6)
)");
DebugInfoDummyAnalysis *P = new DebugInfoDummyAnalysis();
DebugInfoPerPassMap DIPreservationMap;
DebugifyCustomPassManager Passes;
Passes.setDIPreservationMap(DIPreservationMap);
Passes.add(createDebugifyModulePass(DebugifyMode::OriginalDebugInfo, "",
&(Passes.getDebugInfoPerPassMap())));
Passes.add(P);
Passes.add(createCheckDebugifyModulePass(false, "", nullptr,
DebugifyMode::OriginalDebugInfo,
&(Passes.getDebugInfoPerPassMap())));
testing::internal::CaptureStderr();
Passes.run(*M);
std::string StdOut = testing::internal::GetCapturedStderr();
std::string ErrorForSP = "ERROR: dropped DISubprogram of";
std::string WarningForLoc = "WARNING: dropped DILocation of";
std::string WarningForVars = "WARNING: drops dbg.value()/dbg.declare() for";
std::string FinalResult = "CheckModuleDebugify (original debuginfo): PASS";
EXPECT_TRUE(StdOut.find(ErrorForSP) == std::string::npos);
EXPECT_TRUE(StdOut.find(WarningForLoc) == std::string::npos);
EXPECT_TRUE(StdOut.find(WarningForVars) == std::string::npos);
EXPECT_TRUE(StdOut.find(FinalResult) != std::string::npos);
}
} // end namespace llvm
INITIALIZE_PASS_BEGIN(DebugInfoDrop, "debuginfodroppass", "debuginfodroppass",
false, false)
INITIALIZE_PASS_END(DebugInfoDrop, "debuginfodroppass", "debuginfodroppass", false,
false)
INITIALIZE_PASS_BEGIN(DebugInfoDummyAnalysis, "debuginfodummyanalysispass",
"debuginfodummyanalysispass", false, false)
INITIALIZE_PASS_END(DebugInfoDummyAnalysis, "debuginfodummyanalysispass",
"debuginfodummyanalysispass", false, false)
|
