class SelectionDAG;
struct EVT;
-/// ComputeLinearIndex - Given an LLVM IR aggregate type and a sequence
-/// of insertvalue or extractvalue indices that identify a member, return
-/// the linearized index of the start of the member.
+/// \brief Compute the linearized index of a member in a nested
+/// aggregate/struct/array.
///
+/// Given an LLVM IR aggregate type and a sequence of insertvalue or
+/// extractvalue indices that identify a member, return the linearized index of
+/// the start of the member, i.e the number of element in memory before the
+/// seeked one. This is disconnected from the number of bytes.
+///
+/// \param Ty is the type indexed by \p Indices.
+/// \param Indices is an optional pointer in the indices list to the current
+/// index.
+/// \param IndicesEnd is the end of the indices list.
+/// \param CurIndex is the current index in the recursion.
+///
+/// \returns \p CurIndex plus the linear index in \p Ty the indices list.
unsigned ComputeLinearIndex(Type *Ty,
const unsigned *Indices,
const unsigned *IndicesEnd,
/// If Offsets is non-null, it points to a vector to be filled in
/// with the in-memory offsets of each of the individual values.
///
-void ComputeValueVTs(const TargetLowering &TLI, Type *Ty,
+void ComputeValueVTs(const TargetLowering &TLI, const DataLayout &DL, Type *Ty,
SmallVectorImpl<EVT> &ValueVTs,
SmallVectorImpl<uint64_t> *Offsets = nullptr,
uint64_t StartingOffset = 0);