+/// getPointeeAlignment - Compute the minimum alignment of the value pointed
+/// to by the given pointer.
+static unsigned getPointeeAlignment(Value *V, const TargetData &TD) {
+ if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V))
+ if (CE->getOpcode() == Instruction::BitCast ||
+ (CE->getOpcode() == Instruction::GetElementPtr &&
+ cast<GEPOperator>(CE)->hasAllZeroIndices()))
+ return getPointeeAlignment(CE->getOperand(0), TD);
+
+ if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V))
+ if (!GV->isDeclaration())
+ return TD.getPreferredAlignment(GV);
+
+ if (PointerType *PT = dyn_cast<PointerType>(V->getType()))
+ return TD.getABITypeAlignment(PT->getElementType());
+
+ return 0;
+}
+