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
|
//===-- GCMetadata.cpp - Garbage collector metadata -----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the GCFunctionInfo class and GCModuleInfo pass.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/GCMetadata.h"
#include "llvm/CodeGen/GCStrategy.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/Pass.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/Function.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
namespace {
class Printer : public FunctionPass {
static char ID;
raw_ostream &OS;
public:
Printer() : FunctionPass(&ID), OS(errs()) {}
explicit Printer(raw_ostream &OS) : FunctionPass(&ID), OS(OS) {}
const char *getPassName() const;
void getAnalysisUsage(AnalysisUsage &AU) const;
bool runOnFunction(Function &F);
};
class Deleter : public FunctionPass {
static char ID;
public:
Deleter();
const char *getPassName() const;
void getAnalysisUsage(AnalysisUsage &AU) const;
bool runOnFunction(Function &F);
bool doFinalization(Module &M);
};
}
static RegisterPass<GCModuleInfo>
X("collector-metadata", "Create Garbage Collector Module Metadata");
// -----------------------------------------------------------------------------
GCFunctionInfo::GCFunctionInfo(const Function &F, GCStrategy &S)
: F(F), S(S), FrameSize(~0LL) {}
GCFunctionInfo::~GCFunctionInfo() {}
// -----------------------------------------------------------------------------
char GCModuleInfo::ID = 0;
GCModuleInfo::GCModuleInfo()
: ImmutablePass(&ID) {}
GCModuleInfo::~GCModuleInfo() {
clear();
}
GCStrategy *GCModuleInfo::getOrCreateStrategy(const Module *M,
const std::string &Name) {
strategy_map_type::iterator NMI = StrategyMap.find(Name);
if (NMI != StrategyMap.end())
return NMI->getValue();
for (GCRegistry::iterator I = GCRegistry::begin(),
E = GCRegistry::end(); I != E; ++I) {
if (Name == I->getName()) {
GCStrategy *S = I->instantiate();
S->M = M;
S->Name = Name;
StrategyMap.GetOrCreateValue(Name).setValue(S);
StrategyList.push_back(S);
return S;
}
}
errs() << "unsupported GC: " << Name << "\n";
llvm_unreachable(0);
}
GCFunctionInfo &GCModuleInfo::getFunctionInfo(const Function &F) {
assert(!F.isDeclaration() && "Can only get GCFunctionInfo for a definition!");
assert(F.hasGC());
finfo_map_type::iterator I = FInfoMap.find(&F);
if (I != FInfoMap.end())
return *I->second;
GCStrategy *S = getOrCreateStrategy(F.getParent(), F.getGC());
GCFunctionInfo *GFI = S->insertFunctionInfo(F);
FInfoMap[&F] = GFI;
return *GFI;
}
void GCModuleInfo::clear() {
FInfoMap.clear();
StrategyMap.clear();
for (iterator I = begin(), E = end(); I != E; ++I)
delete *I;
StrategyList.clear();
}
// -----------------------------------------------------------------------------
char Printer::ID = 0;
FunctionPass *llvm::createGCInfoPrinter(raw_ostream &OS) {
return new Printer(OS);
}
const char *Printer::getPassName() const {
return "Print Garbage Collector Information";
}
void Printer::getAnalysisUsage(AnalysisUsage &AU) const {
FunctionPass::getAnalysisUsage(AU);
AU.setPreservesAll();
AU.addRequired<GCModuleInfo>();
}
static const char *DescKind(GC::PointKind Kind) {
switch (Kind) {
default: llvm_unreachable("Unknown GC point kind");
case GC::Loop: return "loop";
case GC::Return: return "return";
case GC::PreCall: return "pre-call";
case GC::PostCall: return "post-call";
}
}
bool Printer::runOnFunction(Function &F) {
if (!F.hasGC()) {
GCFunctionInfo *FD = &getAnalysis<GCModuleInfo>().getFunctionInfo(F);
OS << "GC roots for " << FD->getFunction().getNameStr() << ":\n";
for (GCFunctionInfo::roots_iterator RI = FD->roots_begin(),
RE = FD->roots_end(); RI != RE; ++RI)
OS << "\t" << RI->Num << "\t" << RI->StackOffset << "[sp]\n";
OS << "GC safe points for " << FD->getFunction().getNameStr() << ":\n";
for (GCFunctionInfo::iterator PI = FD->begin(),
PE = FD->end(); PI != PE; ++PI) {
OS << "\tlabel " << PI->Num << ": " << DescKind(PI->Kind) << ", live = {";
for (GCFunctionInfo::live_iterator RI = FD->live_begin(PI),
RE = FD->live_end(PI);;) {
OS << " " << RI->Num;
if (++RI == RE)
break;
OS << ",";
}
OS << " }\n";
}
}
return false;
}
// -----------------------------------------------------------------------------
char Deleter::ID = 0;
FunctionPass *llvm::createGCInfoDeleter() {
return new Deleter();
}
Deleter::Deleter() : FunctionPass(&ID) {}
const char *Deleter::getPassName() const {
return "Delete Garbage Collector Information";
}
void Deleter::getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
AU.addRequired<GCModuleInfo>();
}
bool Deleter::runOnFunction(Function &MF) {
return false;
}
bool Deleter::doFinalization(Module &M) {
GCModuleInfo *GMI = getAnalysisIfAvailable<GCModuleInfo>();
assert(GMI && "Deleter didn't require GCModuleInfo?!");
GMI->clear();
return false;
}
|
