/// @note The unusual order of elements in the structure attempts to reduce
/// padding and make the structure slightly more cache friendly.
struct TargetAlignElem {
- AlignTypeEnum AlignType : 8; ///< Alignment type (AlignTypeEnum)
- unsigned ABIAlign; ///< ABI alignment for this type/bitw
- unsigned PrefAlign; ///< Pref. alignment for this type/bitw
- uint32_t TypeBitWidth; ///< Type bit width
+ uint32_t AlignType : 8; ///< Alignment type (AlignTypeEnum)
+ uint32_t TypeBitWidth : 24; ///< Type bit width
+ uint32_t ABIAlign : 16; ///< ABI alignment for this type/bitw
+ uint32_t PrefAlign : 16; ///< Pref. alignment for this type/bitw
/// Initializer
static TargetAlignElem get(AlignTypeEnum align_type, unsigned abi_align,
TargetData::setAlignment(AlignTypeEnum align_type, unsigned abi_align,
unsigned pref_align, uint32_t bit_width) {
assert(abi_align <= pref_align && "Preferred alignment worse than ABI!");
+ assert(pref_align < (1 << 16) && "Alignment doesn't fit in bitfield");
+ assert(bit_width < (1 << 24) && "Bit width doesn't fit in bitfield");
for (unsigned i = 0, e = Alignments.size(); i != e; ++i) {
if (Alignments[i].AlignType == align_type &&
Alignments[i].TypeBitWidth == bit_width) {