1 //===-- ValueSymbolTable.cpp - Implement the ValueSymbolTable class -------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the ValueSymbolTable class for the VMCore library.
12 //===----------------------------------------------------------------------===//
14 #define DEBUG_TYPE "valuesymtab"
15 #include "llvm/GlobalValue.h"
16 #include "llvm/Type.h"
17 #include "llvm/ValueSymbolTable.h"
18 #include "llvm/ADT/SmallString.h"
19 #include "llvm/Support/Debug.h"
23 ValueSymbolTable::~ValueSymbolTable() {
24 #ifndef NDEBUG // Only do this in -g mode...
25 for (iterator VI = vmap.begin(), VE = vmap.end(); VI != VE; ++VI)
26 cerr << "Value still in symbol table! Type = '"
27 << VI->getValue()->getType()->getDescription() << "' Name = '"
28 << VI->getKeyData() << "'\n";
29 assert(vmap.empty() && "Values remain in symbol table!");
33 // lookup a value - Returns null on failure...
35 Value *ValueSymbolTable::lookup(const std::string &Name) const {
36 const_iterator VI = vmap.find(Name);
37 if (VI != vmap.end()) // We found the symbol
38 return VI->getValue();
42 Value *ValueSymbolTable::lookup(const char *NameBegin,
43 const char *NameEnd) const {
44 // FIXME: ValueSymbolTable should move to a StringRef based API.
45 const_iterator VI = vmap.find(StringRef(NameBegin, NameEnd - NameBegin));
46 if (VI != vmap.end()) // We found the symbol
47 return VI->getValue();
51 // Insert a value into the symbol table with the specified name...
53 void ValueSymbolTable::reinsertValue(Value* V) {
54 assert(V->hasName() && "Can't insert nameless Value into symbol table");
56 // Try inserting the name, assuming it won't conflict.
57 if (vmap.insert(V->Name)) {
58 //DOUT << " Inserted value: " << V->Name << ": " << *V << "\n";
62 // Otherwise, there is a naming conflict. Rename this value.
63 SmallString<128> UniqueName(V->getNameStart(), V->getNameEnd());
65 // The name is too already used, just free it so we can allocate a new name.
68 unsigned BaseSize = UniqueName.size();
70 // Trim any suffix off.
71 UniqueName.resize(BaseSize);
72 UniqueName.append_uint_32(++LastUnique);
73 // Try insert the vmap entry with this suffix.
75 vmap.GetOrCreateValue(StringRef(UniqueName.data(),
77 if (NewName.getValue() == 0) {
78 // Newly inserted name. Success!
81 //DEBUG(DOUT << " Inserted value: " << UniqueName << ": " << *V << "\n");
87 void ValueSymbolTable::removeValueName(ValueName *V) {
88 //DEBUG(DOUT << " Removing Value: " << V->getKeyData() << "\n");
89 // Remove the value from the symbol table.
93 /// createValueName - This method attempts to create a value name and insert
94 /// it into the symbol table with the specified name. If it conflicts, it
95 /// auto-renames the name and returns that instead.
96 ValueName *ValueSymbolTable::createValueName(const char *NameStart,
97 unsigned NameLen, Value *V) {
98 // In the common case, the name is not already in the symbol table.
99 ValueName &Entry = vmap.GetOrCreateValue(StringRef(NameStart, NameLen));
100 if (Entry.getValue() == 0) {
102 //DEBUG(DOUT << " Inserted value: " << Entry.getKeyData() << ": "
107 // Otherwise, there is a naming conflict. Rename this value.
108 SmallString<128> UniqueName(NameStart, NameStart+NameLen);
111 // Trim any suffix off.
112 UniqueName.resize(NameLen);
113 UniqueName.append_uint_32(++LastUnique);
115 // Try insert the vmap entry with this suffix.
117 vmap.GetOrCreateValue(StringRef(UniqueName.data(),
119 if (NewName.getValue() == 0) {
120 // Newly inserted name. Success!
122 //DEBUG(DOUT << " Inserted value: " << UniqueName << ": " << *V << "\n");
129 // dump - print out the symbol table
131 void ValueSymbolTable::dump() const {
132 //DOUT << "ValueSymbolTable:\n";
133 for (const_iterator I = begin(), E = end(); I != E; ++I) {
134 //DOUT << " '" << I->getKeyData() << "' = ";
135 I->getValue()->dump();