/// <summary>
/// Returns initial and unconstrained alignment information.
/// </summary>
/// <param name="node">The IR node.</param>
/// <returns>The initial alignment information.</returns>
private static int GetInitialAlignment(Value node)
{
switch (node)
{
case Alloca alloca:
return(AllocaAlignments.GetInitialAlignment(alloca));
case AlignViewTo alignTo:
// Use a compile-time known alignment constant for the alignment
// information instead of type-based alignment reasoning
return(alignTo.GetAlignmentConstant());
case NewView _:
case BaseAddressSpaceCast _:
case SubViewValue _:
case LoadElementAddress _:
case LoadFieldAddress _:
case GetField _:
case SetField _:
case StructureValue _:
case Load _:
case Store _:
case PhiValue _:
case PrimitiveValue _:
case NullValue _:
case UndefinedValue _:
return(int.MaxValue);
default:
return(1);
}
}
/// <summary>
/// Returns the alignment information determined and used for the given
/// alloca.
/// </summary>
/// <param name="alloca">
/// The alloca to get the alignment information for.
/// </param>
/// <returns>The determined and used alignment in bytes.</returns>
public readonly int GetAllocaAlignment(Alloca alloca) =>
GetAlignment(
alloca,
AllocaAlignments.GetInitialAlignment(alloca));
