CMake: removed lib/VMCore/DebugInfoBuilder.cpp.

[oota-llvm.git] / lib / VMCore / Value.cpp

diff --git a/lib/VMCore/Value.cpp b/lib/VMCore/Value.cpp
index bc5b7a9f81cb5d4b892740f4a85790bbe3b87dab..ab7e0443c07b8057b16b29194aebef23e25aa9e2 100644 (file)
--- a/lib/VMCore/Value.cpp
+++ b/lib/VMCore/Value.cpp
@@ -54,9 +54,9 @@ Value::~Value() {
   // a <badref>
   //
   if (!use_empty()) {
-    DOUT << "While deleting: " << *VTy << " %" << getNameStr() << "\n";
+    cerr << "While deleting: " << *VTy << " %" << getNameStr() << "\n";
     for (use_iterator I = use_begin(), E = use_end(); I != E; ++I)
-      DOUT << "Use still stuck around after Def is destroyed:"
+      cerr << "Use still stuck around after Def is destroyed:"
            << **I << "\n";
   }
 #endif
@@ -95,7 +95,7 @@ bool Value::hasNUsesOrMore(unsigned N) const {
 
 /// isUsedInBasicBlock - Return true if this value is used in the specified
 /// basic block.
-bool Value::isUsedInBasicBlock(BasicBlock *BB) const {
+bool Value::isUsedInBasicBlock(const BasicBlock *BB) const {
   for (use_const_iterator I = use_begin(), E = use_end(); I != E; ++I) {
     const Instruction *User = dyn_cast<Instruction>(*I);
     if (User && User->getParent() == BB)
@@ -322,29 +322,68 @@ void Value::replaceAllUsesWith(Value *New) {
 }
 
 Value *Value::stripPointerCasts() {
-  if (ConstantExpr *CE = dyn_cast<ConstantExpr>(this)) {
-    if (CE->getOpcode() == Instruction::BitCast) {
-      if (isa<PointerType>(CE->getOperand(0)->getType()))
-        return CE->getOperand(0)->stripPointerCasts();
-    } else if (CE->getOpcode() == Instruction::GetElementPtr) {
-      for (unsigned i = 1, e = CE->getNumOperands(); i != e; ++i)
-        if (!CE->getOperand(i)->isNullValue())
-          return this;
-      return CE->getOperand(0)->stripPointerCasts();
+  if (!isa<PointerType>(getType()))
+    return this;
+  Value *V = this;
+  do {
+    if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
+      if (CE->getOpcode() == Instruction::GetElementPtr) {
+        for (unsigned i = 1, e = CE->getNumOperands(); i != e; ++i)
+          if (!CE->getOperand(i)->isNullValue())
+            return V;
+        V = CE->getOperand(0);
+      } else if (CE->getOpcode() == Instruction::BitCast) {
+        V = CE->getOperand(0);
+      } else {
+        return V;
+      }
+    } else if (GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(V)) {
+      if (!GEP->hasAllZeroIndices())
+        return V;
+      V = GEP->getOperand(0);
+    } else if (BitCastInst *CI = dyn_cast<BitCastInst>(V)) {
+      V = CI->getOperand(0);
+    } else {
+      return V;
     }
+    assert(isa<PointerType>(V->getType()) && "Unexpected operand type!");
+  } while (1);
+}
+
+Value *Value::getUnderlyingObject() {
+  if (!isa<PointerType>(getType()))
     return this;
-  }
+  Value *V = this;
+  do {
+    if (Instruction *I = dyn_cast<Instruction>(V)) {
+      if (!isa<BitCastInst>(I) && !isa<GetElementPtrInst>(I))
+        return V;
+      V = I->getOperand(0);
+    } else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
+      if (CE->getOpcode() != Instruction::BitCast &&
+          CE->getOpcode() != Instruction::GetElementPtr)
+        return V;
+      V = CE->getOperand(0);
+    } else {
+      return V;
+    }
+    assert(isa<PointerType>(V->getType()) && "Unexpected operand type!");
+  } while (1);
+}
 
-  if (BitCastInst *CI = dyn_cast<BitCastInst>(this)) {
-    if (isa<PointerType>(CI->getOperand(0)->getType()))
-      return CI->getOperand(0)->stripPointerCasts();
-  } else if (GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(this)) {
-    if (GEP->hasAllZeroIndices())
-      return GEP->getOperand(0)->stripPointerCasts();
-  }
+/// DoPHITranslation - If this value is a PHI node with CurBB as its parent,
+/// return the value in the PHI node corresponding to PredBB.  If not, return
+/// ourself.  This is useful if you want to know the value something has in a
+/// predecessor block.
+Value *Value::DoPHITranslation(const BasicBlock *CurBB, 
+                               const BasicBlock *PredBB) {
+  PHINode *PN = dyn_cast<PHINode>(this);
+  if (PN && PN->getParent() == CurBB)
+    return PN->getIncomingValueForBlock(PredBB);
   return this;
 }
 
+
 //===----------------------------------------------------------------------===//
 //                                 User Class
 //===----------------------------------------------------------------------===//