swift234

SIL: Associate SILTypeInfo with the SILModule.
For some types, there is lowering info that is useful to IRGen, such as the SIL-level calling convention for functions or the element layout of aggregates, that can't fit in a SILType pointer but still should be associated with the module. Add a SILTypeInfo hierarchy, add a mapping of SILTypes to infos to SILModule, and rename the SILGen-specific TypeInfo to TypeLoweringInfo. Move the derived layout information for compound types from TypeLoweringInfo to SILTypeInfo so that IRGen will be able to use it.

Swift SVN r3712