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120 lines
4.0 KiB
C++
120 lines
4.0 KiB
C++
//===-- ValueSymbolTable.cpp - Implement the ValueSymbolTable class -------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the ValueSymbolTable class for the VMCore library.
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "valuesymtab"
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#include "llvm/GlobalValue.h"
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#include "llvm/Type.h"
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#include "llvm/ValueSymbolTable.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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// Class destructor
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ValueSymbolTable::~ValueSymbolTable() {
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#ifndef NDEBUG // Only do this in -g mode...
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for (iterator VI = vmap.begin(), VE = vmap.end(); VI != VE; ++VI)
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dbgs() << "Value still in symbol table! Type = '"
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<< VI->getValue()->getType()->getDescription() << "' Name = '"
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<< VI->getKeyData() << "'\n";
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assert(vmap.empty() && "Values remain in symbol table!");
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#endif
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}
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// Insert a value into the symbol table with the specified name...
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//
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void ValueSymbolTable::reinsertValue(Value* V) {
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assert(V->hasName() && "Can't insert nameless Value into symbol table");
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// Try inserting the name, assuming it won't conflict.
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if (vmap.insert(V->Name)) {
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//DEBUG(dbgs() << " Inserted value: " << V->Name << ": " << *V << "\n");
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return;
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}
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// Otherwise, there is a naming conflict. Rename this value.
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SmallString<256> UniqueName(V->getName().begin(), V->getName().end());
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// The name is too already used, just free it so we can allocate a new name.
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V->Name->Destroy();
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unsigned BaseSize = UniqueName.size();
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while (1) {
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// Trim any suffix off and append the next number.
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UniqueName.resize(BaseSize);
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raw_svector_ostream(UniqueName) << ++LastUnique;
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// Try insert the vmap entry with this suffix.
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ValueName &NewName = vmap.GetOrCreateValue(UniqueName);
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if (NewName.getValue() == 0) {
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// Newly inserted name. Success!
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NewName.setValue(V);
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V->Name = &NewName;
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//DEBUG(dbgs() << " Inserted value: " << UniqueName << ": " << *V << "\n");
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return;
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}
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}
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}
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void ValueSymbolTable::removeValueName(ValueName *V) {
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//DEBUG(dbgs() << " Removing Value: " << V->getKeyData() << "\n");
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// Remove the value from the symbol table.
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vmap.remove(V);
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}
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/// createValueName - This method attempts to create a value name and insert
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/// it into the symbol table with the specified name. If it conflicts, it
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/// auto-renames the name and returns that instead.
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ValueName *ValueSymbolTable::createValueName(StringRef Name, Value *V) {
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// In the common case, the name is not already in the symbol table.
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ValueName &Entry = vmap.GetOrCreateValue(Name);
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if (Entry.getValue() == 0) {
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Entry.setValue(V);
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//DEBUG(dbgs() << " Inserted value: " << Entry.getKeyData() << ": "
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// << *V << "\n");
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return &Entry;
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}
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// Otherwise, there is a naming conflict. Rename this value.
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SmallString<256> UniqueName(Name.begin(), Name.end());
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while (1) {
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// Trim any suffix off and append the next number.
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UniqueName.resize(Name.size());
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raw_svector_ostream(UniqueName) << ++LastUnique;
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// Try insert the vmap entry with this suffix.
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ValueName &NewName = vmap.GetOrCreateValue(UniqueName);
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if (NewName.getValue() == 0) {
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// Newly inserted name. Success!
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NewName.setValue(V);
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//DEBUG(dbgs() << " Inserted value: " << UniqueName << ": " << *V << "\n");
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return &NewName;
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}
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}
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}
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// dump - print out the symbol table
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//
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void ValueSymbolTable::dump() const {
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//DEBUG(dbgs() << "ValueSymbolTable:\n");
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for (const_iterator I = begin(), E = end(); I != E; ++I) {
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//DEBUG(dbgs() << " '" << I->getKeyData() << "' = ");
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I->getValue()->dump();
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//DEBUG(dbgs() << "\n");
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}
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}
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MDSymbolTable::~MDSymbolTable() { }
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