//===-- Value.cpp - Implement the Value class -----------------------------===//
+//
+// 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 implements the Value and User classes.
//
#include "llvm/InstrTypes.h"
#include "llvm/SymbolTable.h"
#include "llvm/DerivedTypes.h"
+#include "llvm/Constant.h"
+#include "Support/LeakDetector.h"
#include <algorithm>
-#include <iostream>
+using namespace llvm;
+
//===----------------------------------------------------------------------===//
// Value Class
//===----------------------------------------------------------------------===//
return Ty;
}
-Value::Value(const Type *ty, ValueTy vty, const std::string &name = "")
- : Name(name), Ty(checkType(ty), this) {
+Value::Value(const Type *ty, ValueTy vty, const std::string &name)
+ : Name(name), Ty(checkType(ty)) {
VTy = vty;
}
// a <badref>
//
if (Uses.begin() != Uses.end()) {
- std::cerr << "While deleting: " << Ty << "%" << Name << "\n";
- for (use_const_iterator I = Uses.begin(); I != Uses.end(); ++I) {
- std::cerr << "Use still stuck around after Def is destroyed:";
- (*I)->dump();
- std::cerr << "\n";
- }
+ std::cerr << "While deleting: " << *Ty << "%" << Name << "\n";
+ for (use_const_iterator I = Uses.begin(), E = Uses.end(); I != E; ++I)
+ std::cerr << "Use still stuck around after Def is destroyed:"
+ << **I << "\n";
}
#endif
- assert(Uses.begin() == Uses.end());
+ assert(Uses.begin() == Uses.end() &&"Uses remain when a value is destroyed!");
+
+ // There should be no uses of this object anymore, remove it.
+ LeakDetector::removeGarbageObject(this);
}
-void Value::replaceAllUsesWith(Value *D) {
- assert(D && "Value::replaceAllUsesWith(<null>) is invalid!");
- assert(D != this && "V->replaceAllUsesWith(V) is NOT valid!");
- assert(D->getType() == getType() &&
- "replaceAllUses of value with new value of different type!");
- while (!Uses.empty()) {
- User *Use = Uses.back();
-#ifndef NDEBUG
- unsigned NumUses = Uses.size();
-#endif
- Use->replaceUsesOfWith(this, D);
-#ifndef NDEBUG // only in -g mode...
- if (Uses.size() == NumUses) {
- std::cerr << "Use: ";
- Use->dump();
- std::cerr << "replace with: ";
- D->dump();
+// uncheckedReplaceAllUsesWith - This is exactly the same as replaceAllUsesWith,
+// except that it doesn't have all of the asserts. The asserts fail because we
+// are half-way done resolving types, which causes some types to exist as two
+// different Type*'s at the same time. This is a sledgehammer to work around
+// this problem.
+//
+void Value::uncheckedReplaceAllUsesWith(Value *New) {
+ while (!Uses.empty()) {
+ Use &U = Uses.back();
+ // Must handle Constants specially, we cannot call replaceUsesOfWith on a
+ // constant!
+ if (Constant *C = dyn_cast<Constant>(U.getUser())) {
+ C->replaceUsesOfWithOnConstant(this, New, true);
+ } else {
+ U.set(New);
}
-#endif
- assert(Uses.size() != NumUses && "Didn't remove definition!");
}
}
-// refineAbstractType - This function is implemented because we use
-// potentially abstract types, and these types may be resolved to more
-// concrete types after we are constructed. For the value class, we simply
-// change Ty to point to the right type. :)
-//
-void Value::refineAbstractType(const DerivedType *OldTy, const Type *NewTy) {
- assert(Ty.get() == OldTy &&"Can't refine anything but my type!");
- if (OldTy == NewTy && !OldTy->isAbstract())
- Ty.removeUserFromConcrete();
- Ty = NewTy;
-}
-
-void Value::killUse(User *i) {
- if (i == 0) return;
- use_iterator I = find(Uses.begin(), Uses.end(), i);
-
- assert(I != Uses.end() && "Use not in uses list!!");
- Uses.erase(I);
-}
+void Value::replaceAllUsesWith(Value *New) {
+ assert(New && "Value::replaceAllUsesWith(<null>) is invalid!");
+ assert(New != this && "this->replaceAllUsesWith(this) is NOT valid!");
+ assert(New->getType() == getType() &&
+ "replaceAllUses of value with new value of different type!");
-User *Value::use_remove(use_iterator &I) {
- assert(I != Uses.end() && "Trying to remove the end of the use list!!!");
- User *i = *I;
- I = Uses.erase(I);
- return i;
+ uncheckedReplaceAllUsesWith(New);
}
//===----------------------------------------------------------------------===//
void User::replaceUsesOfWith(Value *From, Value *To) {
if (From == To) return; // Duh what?
+ assert(!isa<Constant>(this) &&
+ "Cannot call User::replaceUsesofWith on a constant!");
+
for (unsigned i = 0, E = getNumOperands(); i != E; ++i)
if (getOperand(i) == From) { // Is This operand is pointing to oldval?
// The side effects of this setOperand call include linking to
setOperand(i, To); // Fix it now...
}
}
-
-