Benjamin Kramer 741146b825 Reduce the number of indirections in the attributes implementation.
- Coallocate entires for AttributeSetImpls and Nodes after the class itself.
- Remove mutable iterators from immutable classes.
- Remove unused context field from AttributeImpl.
- Derive Enum/Align/String attribute implementations from AttributeImpl instead
  of having a whole new inheritance tree for them.
- Derive AlignAttributeImpl from EnumAttributeImpl.

llvm-svn: 186075
2013-07-11 12:13:16 +00:00
..
2013-06-17 15:47:20 +00:00