}
const SCEV *ScalarEvolution::getSizeOfExpr(const Type *AllocTy) {
+ // If we have TargetData, we can bypass creating a target-independent
+ // constant expression and then folding it back into a ConstantInt.
+ // This is just a compile-time optimization.
+ if (TD)
+ return getConstant(TD->getIntPtrType(getContext()),
+ TD->getTypeAllocSize(AllocTy));
+
Constant *C = ConstantExpr::getSizeOf(AllocTy);
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
C = ConstantFoldConstantExpression(CE, TD);
const SCEV *ScalarEvolution::getOffsetOfExpr(const StructType *STy,
unsigned FieldNo) {
+ // If we have TargetData, we can bypass creating a target-independent
+ // constant expression and then folding it back into a ConstantInt.
+ // This is just a compile-time optimization.
+ if (TD)
+ return getConstant(TD->getIntPtrType(getContext()),
+ TD->getStructLayout(STy)->getElementOffset(FieldNo));
+
Constant *C = ConstantExpr::getOffsetOf(STy, FieldNo);
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
C = ConstantFoldConstantExpression(CE, TD);