Initial revision
llvm-svn: 2
diff --git a/llvm/lib/VMCore/Value.cpp b/llvm/lib/VMCore/Value.cpp
new file mode 100644
index 0000000..1c3f76b
--- /dev/null
+++ b/llvm/lib/VMCore/Value.cpp
@@ -0,0 +1,143 @@
+//===-- Value.cpp - Implement the Value class -----------------------------===//
+//
+// This file implements the Value class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ValueHolderImpl.h"
+#include "llvm/InstrTypes.h"
+#include "llvm/SymbolTable.h"
+#include "llvm/SymTabValue.h"
+#include "llvm/ConstantPool.h"
+#include "llvm/ConstPoolVals.h"
+#include "llvm/Type.h"
+#ifndef NDEBUG // Only in -g mode...
+#include "llvm/Assembly/Writer.h"
+#endif
+#include <algorithm>
+
+//===----------------------------------------------------------------------===//
+// Value Class
+//===----------------------------------------------------------------------===//
+
+Value::Value(const Type *ty, ValueTy vty, const string &name = "") : Name(name){
+ Ty = ty;
+ VTy = vty;
+}
+
+Value::~Value() {
+#ifndef NDEBUG // Only in -g mode...
+ if (Uses.begin() != Uses.end()) {
+ for (use_const_iterator I = Uses.begin(); I != Uses.end(); I++)
+ cerr << "Use still stuck around after Def is destroyed:" << *I << endl;
+ }
+#endif
+ assert(Uses.begin() == Uses.end());
+}
+
+void Value::replaceAllUsesWith(Value *D) {
+ assert(D && "Value::replaceAllUsesWith(<null>) is invalid!");
+ while (!Uses.empty()) {
+ User *Use = Uses.front();
+#ifndef NDEBUG
+ unsigned NumUses = Uses.size();
+#endif
+ Use->replaceUsesOfWith(this, D);
+
+#ifndef NDEBUG // only in -g mode...
+ if (Uses.size() == NumUses)
+ cerr << "Use: " << Use << "replace with: " << D;
+#endif
+ assert(Uses.size() != NumUses && "Didn't remove definition!");
+ }
+}
+
+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);
+}
+
+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;
+}
+
+
+//===----------------------------------------------------------------------===//
+// User Class
+//===----------------------------------------------------------------------===//
+
+User::User(const Type *Ty, ValueTy vty, const string &name)
+ : Value(Ty, vty, name) {
+}
+
+// replaceUsesOfWith - Replaces all references to the "From" definition with
+// references to the "To" definition.
+//
+void User::replaceUsesOfWith(Value *From, Value *To) {
+ if (From == To) return; // Duh what?
+
+ for (unsigned OpNum = 0; Value *D = getOperand(OpNum); OpNum++) {
+ if (D == From) { // Okay, this operand is pointing to our fake def.
+ // The side effects of this setOperand call include linking to
+ // "To", adding "this" to the uses list of To, and
+ // most importantly, removing "this" from the use list of "From".
+ setOperand(OpNum, To); // Fix it now...
+ }
+ }
+}
+
+
+//===----------------------------------------------------------------------===//
+// SymTabValue Class
+//===----------------------------------------------------------------------===//
+
+// Instantiate Templates - This ugliness is the price we have to pay
+// for having a ValueHolderImpl.h file seperate from ValueHolder.h! :(
+//
+template class ValueHolder<ConstPoolVal, SymTabValue>;
+
+SymTabValue::SymTabValue(const Type *Ty, ValueTy dty, const string &name = "")
+ : Value(Ty, dty, name), ConstPool(this) {
+ ParentSymTab = SymTab = 0;
+}
+
+
+SymTabValue::~SymTabValue() {
+ ConstPool.dropAllReferences();
+ ConstPool.delete_all();
+ ConstPool.setParent(0);
+
+ delete SymTab;
+}
+
+void SymTabValue::setParentSymTab(SymbolTable *ST) {
+ ParentSymTab = ST;
+ if (SymTab)
+ SymTab->setParentSymTab(ST);
+}
+
+SymbolTable *SymTabValue::getSymbolTableSure() {
+ if (!SymTab) SymTab = new SymbolTable(ParentSymTab);
+ return SymTab;
+}
+
+// hasSymbolTable() - Returns true if there is a symbol table allocated to
+// this object AND if there is at least one name in it!
+//
+bool SymTabValue::hasSymbolTable() const {
+ if (!SymTab) return false;
+
+ for (SymbolTable::const_iterator I = SymTab->begin();
+ I != SymTab->end(); I++) {
+ if (I->second.begin() != I->second.end())
+ return true; // Found nonempty type plane!
+ }
+
+ return false;
+}