Do not allow adds of pointer types, or many other operations on pointer types.

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

diff --git a/lib/VMCore/iMemory.cpp b/lib/VMCore/iMemory.cpp
index 41c14b04d55b4d22e75680c49bd58f32570ea8de..4ec9e26fbe2a83990273a5e9f92d77f6141ba4fb 100644 (file)
--- a/lib/VMCore/iMemory.cpp
+++ b/lib/VMCore/iMemory.cpp
@@ -5,39 +5,74 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/iMemory.h"
-#include "llvm/ConstPoolVals.h"
+#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
 
-const Type *LoadInst::getIndexedType(const Type *Ptr, 
-                                    const vector<ConstPoolVal*> &Idx) {
-  if (!Ptr->isPointerType()) return 0;   // Type isn't a pointer type!
- 
-  // Get the type pointed to...
-  Ptr = ((const PointerType*)Ptr)->getValueType();
-
-  if (Ptr->isStructType()) {
-    unsigned CurIDX = 0;
-    while (Ptr->isStructType()) {
-      if (Idx.size() == CurIDX) return 0;       // Can't load a whole structure!
-      if (Idx[CurIDX]->getType() != Type::UByteTy) return 0; // Illegal idx
-      unsigned NextIdx = ((ConstPoolUInt*)Idx[CurIDX++])->getValue();
-      
-      const StructType *ST = (const StructType *)Ptr;
-      Ptr = ST->getElementTypes()[NextIdx];
-    }
-    return Ptr;
-  } else if (Ptr->isArrayType()) {
-    assert(0 && "Loading from arrays not implemented yet!");
-  } else {
-    return (Idx.size() == 0) ? Ptr : 0;  // Load directly through ptr
-  }
+static inline const Type *checkType(const Type *Ty) {
+  assert(Ty && "Invalid indices for type!");
+  return Ty;
+}
+
+AllocationInst::AllocationInst(const Type *Ty, Value *ArraySize, unsigned iTy, 
+                               const std::string &Name)
+  : Instruction(Ty, iTy, Name) {
+  assert(isa<PointerType>(Ty) && "Can't allocate a non pointer type!");
+
+  // ArraySize defaults to 1.
+  if (!ArraySize) ArraySize = ConstantUInt::get(Type::UIntTy, 1);
+
+  Operands.reserve(1);
+  assert(ArraySize->getType() == Type::UIntTy &&
+         "Malloc/Allocation array size != UIntTy!");
+
+  Operands.push_back(Use(ArraySize, this));
+}
+
+bool AllocationInst::isArrayAllocation() const {
+  return getNumOperands() == 1 &&
+         getOperand(0) != ConstantUInt::get(Type::UIntTy, 1);
+}
+
+const Type *AllocationInst::getAllocatedType() const {
+  return getType()->getElementType();
 }
 
 
-LoadInst::LoadInst(Value *Ptr, const vector<ConstPoolVal*> &Idx,
-                  const string &Name = "")
-  : Instruction(getIndexedType(Ptr->getType(), Idx), Load, Name) {
-  assert(getIndexedType(Ptr->getType(), Idx) && "Load operands invalid!");
-  assert(Ptr->getType()->isPointerType() && "Can't free nonpointer!");
+//===----------------------------------------------------------------------===//
+//                           LoadInst Implementation
+//===----------------------------------------------------------------------===//
+
+LoadInst::LoadInst(Value *Ptr, const std::string &Name)
+  : Instruction(cast<PointerType>(Ptr->getType())->getElementType(),
+                Load, Name) {
+  Operands.reserve(1);
+  Operands.push_back(Use(Ptr, this));
+}
+
+
+//===----------------------------------------------------------------------===//
+//                           StoreInst Implementation
+//===----------------------------------------------------------------------===//
+
+StoreInst::StoreInst(Value *Val, Value *Ptr)
+  : Instruction(Type::VoidTy, Store, "") {
+  
+  Operands.reserve(2);
+  Operands.push_back(Use(Val, this));
+  Operands.push_back(Use(Ptr, this));
+}
+
+
+//===----------------------------------------------------------------------===//
+//                       GetElementPtrInst Implementation
+//===----------------------------------------------------------------------===//
+
+GetElementPtrInst::GetElementPtrInst(Value *Ptr, const std::vector<Value*> &Idx,
+                                    const std::string &Name)
+  : Instruction(PointerType::get(checkType(getIndexedType(Ptr->getType(),
+                                                            Idx, true))),
+                 GetElementPtr, Name) {
+  assert(getIndexedType(Ptr->getType(), Idx, true) && "gep operands invalid!");
   Operands.reserve(1+Idx.size());
   Operands.push_back(Use(Ptr, this));
 
@@ -45,3 +80,42 @@ LoadInst::LoadInst(Value *Ptr, const vector<ConstPoolVal*> &Idx,
     Operands.push_back(Use(Idx[i], this));
 }
 
+// getIndexedType - Returns the type of the element that would be loaded with
+// a load instruction with the specified parameters.
+//
+// A null type is returned if the indices are invalid for the specified 
+// pointer type.
+//
+const Type* GetElementPtrInst::getIndexedType(const Type *Ptr, 
+                                              const std::vector<Value*> &Idx,
+                                              bool AllowCompositeLeaf) {
+  if (!isa<PointerType>(Ptr)) return 0;   // Type isn't a pointer type!
+
+  // Handle the special case of the empty set index set...
+  if (Idx.empty()) return cast<PointerType>(Ptr)->getElementType();
+ 
+  unsigned CurIDX = 0;
+  while (const CompositeType *CT = dyn_cast<CompositeType>(Ptr)) {
+    if (Idx.size() == CurIDX) {
+      if (AllowCompositeLeaf || CT->isFirstClassType()) return Ptr;
+      return 0;   // Can't load a whole structure or array!?!?
+    }
+
+    Value *Index = Idx[CurIDX++];
+    if (!CT->indexValid(Index)) return 0;
+    Ptr = CT->getTypeAtIndex(Index);
+  }
+  return CurIDX == Idx.size() ? Ptr : 0;
+}
+
+
+//===----------------------------------------------------------------------===//
+//                             FreeInst Implementation
+//===----------------------------------------------------------------------===//
+
+FreeInst::FreeInst(Value *Ptr) : Instruction(Type::VoidTy, Free, "") {
+  assert(isa<PointerType>(Ptr->getType()) && "Can't free nonpointer!");
+  Operands.reserve(1);
+  Operands.push_back(Use(Ptr, this));
+}
+