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
|
//===-- ValueSymbolTable.cpp - Implement the ValueSymbolTable class -------===//
//
// 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 ValueSymbolTable class for the VMCore library.
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "valuesymtab"
#include "llvm/GlobalValue.h"
#include "llvm/Type.h"
#include "llvm/ValueSymbolTable.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/Debug.h"
using namespace llvm;
// Class destructor
ValueSymbolTable::~ValueSymbolTable() {
#ifndef NDEBUG // Only do this in -g mode...
for (iterator VI = vmap.begin(), VE = vmap.end(); VI != VE; ++VI)
cerr << "Value still in symbol table! Type = '"
<< VI->getValue()->getType()->getDescription() << "' Name = '"
<< VI->getKeyData() << "'\n";
assert(vmap.empty() && "Values remain in symbol table!");
#endif
}
// lookup a value - Returns null on failure...
//
Value *ValueSymbolTable::lookup(const std::string &Name) const {
const_iterator VI = vmap.find(&Name[0], &Name[Name.size()]);
if (VI != vmap.end()) // We found the symbol
return VI->getValue();
return 0;
}
Value *ValueSymbolTable::lookup(const char *NameBegin,
const char *NameEnd) const {
const_iterator VI = vmap.find(NameBegin, NameEnd);
if (VI != vmap.end()) // We found the symbol
return VI->getValue();
return 0;
}
// Insert a value into the symbol table with the specified name...
//
void ValueSymbolTable::reinsertValue(Value* V) {
assert(V->hasName() && "Can't insert nameless Value into symbol table");
// Try inserting the name, assuming it won't conflict.
if (vmap.insert(V->Name)) {
//DOUT << " Inserted value: " << V->Name << ": " << *V << "\n";
return;
}
// Otherwise, there is a naming conflict. Rename this value.
SmallString<128> UniqueName(V->getNameStart(), V->getNameEnd());
// The name is too already used, just free it so we can allocate a new name.
V->Name->Destroy();
unsigned BaseSize = UniqueName.size();
while (1) {
// Trim any suffix off.
UniqueName.resize(BaseSize);
UniqueName.append_uint_32(++LastUnique);
// Try insert the vmap entry with this suffix.
ValueName &NewName = vmap.GetOrCreateValue(&UniqueName[0],
&UniqueName[UniqueName.size()]);
if (NewName.getValue() == 0) {
// Newly inserted name. Success!
NewName.setValue(V);
V->Name = &NewName;
//DEBUG(DOUT << " Inserted value: " << UniqueName << ": " << *V << "\n");
return;
}
}
}
void ValueSymbolTable::removeValueName(ValueName *V) {
//DEBUG(DOUT << " Removing Value: " << V->getKeyData() << "\n");
// Remove the value from the symbol table.
vmap.remove(V);
}
/// createValueName - This method attempts to create a value name and insert
/// it into the symbol table with the specified name. If it conflicts, it
/// auto-renames the name and returns that instead.
ValueName *ValueSymbolTable::createValueName(const char *NameStart,
unsigned NameLen, Value *V) {
// In the common case, the name is not already in the symbol table.
ValueName &Entry = vmap.GetOrCreateValue(NameStart, NameStart+NameLen);
if (Entry.getValue() == 0) {
Entry.setValue(V);
//DEBUG(DOUT << " Inserted value: " << Entry.getKeyData() << ": "
// << *V << "\n");
return &Entry;
}
// Otherwise, there is a naming conflict. Rename this value.
SmallString<128> UniqueName(NameStart, NameStart+NameLen);
while (1) {
// Trim any suffix off.
UniqueName.resize(NameLen);
UniqueName.append_uint_32(++LastUnique);
// Try insert the vmap entry with this suffix.
ValueName &NewName = vmap.GetOrCreateValue(&UniqueName[0],
&UniqueName[UniqueName.size()]);
if (NewName.getValue() == 0) {
// Newly inserted name. Success!
NewName.setValue(V);
//DEBUG(DOUT << " Inserted value: " << UniqueName << ": " << *V << "\n");
return &NewName;
}
}
}
// dump - print out the symbol table
//
void ValueSymbolTable::dump() const {
//DOUT << "ValueSymbolTable:\n";
for (const_iterator I = begin(), E = end(); I != E; ++I) {
//DOUT << " '" << I->getKeyData() << "' = ";
I->getValue()->dump();
//DOUT << "\n";
}
}
|
