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
|
//===- Pass.cpp - LLVM Pass Infrastructure Impementation ------------------===//
//
// This file implements the LLVM Pass infrastructure. It is primarily
// responsible with ensuring that passes are executed and batched together
// optimally.
//
//===----------------------------------------------------------------------===//
#include "llvm/PassManager.h"
#include "llvm/Module.h"
#include "llvm/Function.h"
#include "llvm/BasicBlock.h"
#include "Support/STLExtras.h"
#include <algorithm>
// Source of unique analysis ID #'s.
unsigned AnalysisID::NextID = 0;
void AnalysisResolver::setAnalysisResolver(Pass *P, AnalysisResolver *AR) {
assert(P->Resolver == 0 && "Pass already in a PassManager!");
P->Resolver = AR;
}
// Pass debugging information. Often it is useful to find out what pass is
// running when a crash occurs in a utility. When this library is compiled with
// debugging on, a command line option (--debug-pass) is enabled that causes the
// pass name to be printed before it executes.
//
#include "Support/CommandLine.h"
#include <typeinfo>
#include <iostream>
// Different debug levels that can be enabled...
enum PassDebugLevel {
None, PassStructure, PassExecutions, PassDetails
};
static cl::Enum<enum PassDebugLevel> PassDebugging("debug-pass", cl::Hidden,
"Print PassManager debugging information",
clEnumVal(None , "disable debug output"),
clEnumVal(PassStructure , "print pass structure before run()"),
clEnumVal(PassExecutions, "print pass name before it is executed"),
clEnumVal(PassDetails , "print pass details when it is executed"), 0);
void PMDebug::PrintPassStructure(Pass *P) {
if (PassDebugging >= PassStructure)
P->dumpPassStructure();
}
void PMDebug::PrintPassInformation(unsigned Depth, const char *Action,
Pass *P, Value *V) {
if (PassDebugging >= PassExecutions) {
std::cerr << (void*)P << std::string(Depth*2+1, ' ') << Action << " '"
<< typeid(*P).name();
if (V) {
std::cerr << "' on ";
switch (V->getValueType()) {
case Value::ModuleVal:
std::cerr << "Module\n"; return;
case Value::FunctionVal:
std::cerr << "Function '" << V->getName(); break;
case Value::BasicBlockVal:
std::cerr << "BasicBlock '" << V->getName(); break;
default:
std::cerr << typeid(*V).name() << " '" << V->getName(); break;
}
}
std::cerr << "'...\n";
}
}
void PMDebug::PrintAnalysisSetInfo(unsigned Depth, const char *Msg,
Pass *P, const Pass::AnalysisSet &Set) {
if (PassDebugging >= PassDetails && !Set.empty()) {
std::cerr << (void*)P << std::string(Depth*2+3, ' ') << Msg << " Analyses:";
for (unsigned i = 0; i < Set.size(); ++i) {
Pass *P = Set[i].createPass(); // Good thing this is just debug code...
std::cerr << " " << typeid(*P).name();
delete P;
}
std::cerr << "\n";
}
}
// dumpPassStructure - Implement the -debug-passes=PassStructure option
void Pass::dumpPassStructure(unsigned Offset = 0) {
std::cerr << std::string(Offset*2, ' ') << typeid(*this).name() << "\n";
}
//===----------------------------------------------------------------------===//
// Pass Implementation
//
void Pass::addToPassManager(PassManagerT<Module> *PM, AnalysisSet &Required,
AnalysisSet &Destroyed, AnalysisSet &Provided) {
PM->addPass(this, Required, Destroyed, Provided);
}
//===----------------------------------------------------------------------===//
// MethodPass Implementation
//
// run - On a module, we run this pass by initializing, ronOnMethod'ing once
// for every method in the module, then by finalizing.
//
bool MethodPass::run(Module *M) {
bool Changed = doInitialization(M);
for (Module::iterator I = M->begin(), E = M->end(); I != E; ++I)
if (!(*I)->isExternal()) // Passes are not run on external methods!
Changed |= runOnMethod(*I);
return Changed | doFinalization(M);
}
// run - On a method, we simply initialize, run the method, then finalize.
//
bool MethodPass::run(Function *F) {
if (F->isExternal()) return false; // Passes are not run on external methods!
return doInitialization(F->getParent()) | runOnMethod(F)
| doFinalization(F->getParent());
}
void MethodPass::addToPassManager(PassManagerT<Module> *PM,
AnalysisSet &Required, AnalysisSet &Destroyed,
AnalysisSet &Provided) {
PM->addPass(this, Required, Destroyed, Provided);
}
void MethodPass::addToPassManager(PassManagerT<Function> *PM,
AnalysisSet &Required, AnalysisSet &Destroyed,
AnalysisSet &Provided) {
PM->addPass(this, Required, Destroyed, Provided);
}
//===----------------------------------------------------------------------===//
// BasicBlockPass Implementation
//
// To run this pass on a method, we simply call runOnBasicBlock once for each
// method.
//
bool BasicBlockPass::runOnMethod(Function *F) {
bool Changed = false;
for (Function::iterator I = F->begin(), E = F->end(); I != E; ++I)
Changed |= runOnBasicBlock(*I);
return Changed;
}
// To run directly on the basic block, we initialize, runOnBasicBlock, then
// finalize.
//
bool BasicBlockPass::run(BasicBlock *BB) {
Module *M = BB->getParent()->getParent();
return doInitialization(M) | runOnBasicBlock(BB) | doFinalization(M);
}
void BasicBlockPass::addToPassManager(PassManagerT<Function> *PM,
AnalysisSet &Required,
AnalysisSet &Destroyed,
AnalysisSet &Provided) {
PM->addPass(this, Required, Destroyed, Provided);
}
void BasicBlockPass::addToPassManager(PassManagerT<BasicBlock> *PM,
AnalysisSet &Required,
AnalysisSet &Destroyed,
AnalysisSet &Provided) {
PM->addPass(this, Required, Destroyed, Provided);
}
|
