//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#include "llvm/Constant.h"
#include "llvm/DerivedTypes.h"
#include "llvm/InstrTypes.h"
+#include "llvm/Instructions.h"
#include "llvm/Module.h"
#include "llvm/ValueSymbolTable.h"
#include "llvm/Support/Debug.h"
Value::Value(const Type *ty, unsigned scid)
: SubclassID(scid), SubclassData(0), Ty(checkType(ty)),
UseList(0), Name(0) {
- if (!isa<Constant>(this) && !isa<BasicBlock>(this))
+ if (isa<CallInst>(this) || isa<InvokeInst>(this))
+ assert((Ty->isFirstClassType() || Ty == Type::VoidTy ||
+ isa<OpaqueType>(ty) || Ty->getTypeID() == Type::StructTyID) &&
+ "invalid CallInst type!");
+ else if (!isa<Constant>(this) && !isa<BasicBlock>(this))
assert((Ty->isFirstClassType() || Ty == Type::VoidTy ||
isa<OpaqueType>(ty)) &&
"Cannot create non-first-class values except for constants!");
// still being referenced. The value in question should be printed as
// a <badref>
//
- if (use_begin() != use_end()) {
- DOUT << "While deleting: " << *Ty << " %" << Name << "\n";
+ if (!use_empty()) {
+ DOUT << "While deleting: " << *Ty << " %" << getNameStr() << "\n";
for (use_iterator I = use_begin(), E = use_end(); I != E; ++I)
DOUT << "Use still stuck around after Def is destroyed:"
<< **I << "\n";
}
#endif
- assert(use_begin() == use_end() && "Uses remain when a value is destroyed!");
+ assert(use_empty() && "Uses remain when a value is destroyed!");
+ // If this value is named, destroy the name. This should not be in a symtab
+ // at this point.
+ if (Name)
+ Name->Destroy();
+
// There should be no uses of this object anymore, remove it.
LeakDetector::removeGarbageObject(this);
}
return false;
}
-std::string Value::getName() const {
+/// getNameStart - Return a pointer to a null terminated string for this name.
+/// Note that names can have null characters within the string as well as at
+/// their end. This always returns a non-null pointer.
+const char *Value::getNameStart() const {
+ if (Name == 0) return "";
+ return Name->getKeyData();
+}
+
+/// getNameLen - Return the length of the string, correctly handling nul
+/// characters embedded into them.
+unsigned Value::getNameLen() const {
+ return Name ? Name->getKeyLength() : 0;
+}
+
+
+std::string Value::getNameStr() const {
if (Name == 0) return "";
return std::string(Name->getKeyData(),
Name->getKeyData()+Name->getKeyLength());
}
void Value::setName(const std::string &name) {
- if (name.empty() && !hasName()) return;
- if (getType() != Type::VoidTy && "Cannot assign a name to void values!");
-
+ setName(&name[0], name.size());
+}
+
+void Value::setName(const char *Name) {
+ setName(Name, Name ? strlen(Name) : 0);
+}
+
+void Value::setName(const char *NameStr, unsigned NameLen) {
+ if (NameLen == 0 && !hasName()) return;
+ assert(getType() != Type::VoidTy && "Cannot assign a name to void values!");
// Get the symbol table to update for this object.
ValueSymbolTable *ST;
return; // Cannot set a name on this value (e.g. constant).
if (!ST) { // No symbol table to update? Just do the change.
- if (name.empty()) {
+ if (NameLen == 0) {
// Free the name for this value.
Name->Destroy();
Name = 0;
- } else {
- if (Name) {
- // Name isn't changing.
- if (name.size() == Name->getKeyLength() &&
- !memcmp(Name->getKeyData(), &name[0], name.size()))
- return;
- Name->Destroy();
- }
-
- // Create the new name.
- Name = ValueName::Create(&name[0], &name[name.size()]);
- Name->setValue(this);
+ return;
+ }
+
+ if (Name) {
+ // Name isn't changing?
+ if (NameLen == Name->getKeyLength() &&
+ !memcmp(Name->getKeyData(), NameStr, NameLen))
+ return;
+ Name->Destroy();
}
+
+ // NOTE: Could optimize for the case the name is shrinking to not deallocate
+ // then reallocated.
+
+ // Create the new name.
+ Name = ValueName::Create(NameStr, NameStr+NameLen);
+ Name->setValue(this);
return;
}
// then reallocated.
if (hasName()) {
// Name isn't changing?
- if (name.size() == Name->getKeyLength() &&
- !memcmp(Name->getKeyData(), &name[0], name.size()))
+ if (NameLen == Name->getKeyLength() &&
+ !memcmp(Name->getKeyData(), NameStr, NameLen))
return;
// Remove old name.
Name->Destroy();
Name = 0;
- if (name.empty())
- return;
+ if (NameLen == 0)
+ return;
}
// Name is changing to something new.
- Name = ST->createValueName(&name[0], name.size(), this);
+ Name = ST->createValueName(NameStr, NameLen, this);
}
+
/// takeName - transfer the name from V to this value, setting V's name to
/// empty. It is an error to call V->takeName(V).
void Value::takeName(Value *V) {
- if (!V->hasName()) {
- if (hasName())
- setName("");
+ ValueSymbolTable *ST = 0;
+ // If this value has a name, drop it.
+ if (hasName()) {
+ // Get the symtab this is in.
+ if (getSymTab(this, ST)) {
+ // We can't set a name on this value, but we need to clear V's name if
+ // it has one.
+ if (V->hasName()) V->setName(0, 0);
+ return; // Cannot set a name on this value (e.g. constant).
+ }
+
+ // Remove old name.
+ if (ST)
+ ST->removeValueName(Name);
+ Name->Destroy();
+ Name = 0;
+ }
+
+ // Now we know that this has no name.
+
+ // If V has no name either, we're done.
+ if (!V->hasName()) return;
+
+ // Get this's symtab if we didn't before.
+ if (!ST) {
+ if (getSymTab(this, ST)) {
+ // Clear V's name.
+ V->setName(0, 0);
+ return; // Cannot set a name on this value (e.g. constant).
+ }
+ }
+
+ // Get V's ST, this should always succed, because V has a name.
+ ValueSymbolTable *VST;
+ bool Failure = getSymTab(V, VST);
+ assert(!Failure && "V has a name, so it should have a ST!");
+
+ // If these values are both in the same symtab, we can do this very fast.
+ // This works even if both values have no symtab yet.
+ if (ST == VST) {
+ // Take the name!
+ Name = V->Name;
+ V->Name = 0;
+ Name->setValue(this);
return;
}
- std::string Name = V->getName();
- V->setName("");
- setName(Name);
+ // Otherwise, things are slightly more complex. Remove V's name from VST and
+ // then reinsert it into ST.
+
+ if (VST)
+ VST->removeValueName(V->Name);
+ Name = V->Name;
+ V->Name = 0;
+ Name->setValue(this);
+
+ if (ST)
+ ST->reinsertValue(this);
}
while (!use_empty()) {
Use &U = *UseList;
// Must handle Constants specially, we cannot call replaceUsesOfWith on a
- // constant!
+ // constant because they are uniqued.
if (Constant *C = dyn_cast<Constant>(U.getUser())) {
- if (!isa<GlobalValue>(C))
+ if (!isa<GlobalValue>(C)) {
C->replaceUsesOfWithOnConstant(this, New, &U);
- else
- U.set(New);
- } else {
- U.set(New);
+ continue;
+ }
}
+
+ U.set(New);
}
}
void User::replaceUsesOfWith(Value *From, Value *To) {
if (From == To) return; // Duh what?
- assert(!isa<Constant>(this) || isa<GlobalValue>(this) &&
+ assert((!isa<Constant>(this) || isa<GlobalValue>(this)) &&
"Cannot call User::replaceUsesofWith on a constant!");
for (unsigned i = 0, E = getNumOperands(); i != E; ++i)