We ignore casts when generating projection paths for alias analysis. When
comparing two paths, we say no alias when accessing different fields of
the same Decl Context.
Swift SVN r20353
A first element field of a nominal type is either the first element of a
struct or the first payload of an enum. We currently allow the stdlib to
rappel into struct heirarchies using reinterpretCast. This patch teaches
the optimizer how to rewrite such unchecked_addr_cast into
unchecked_enum_data_addr and struct_element_addr instructions. Then
Mem2Reg and Load Store Forwarding will remove the allocation generated
by such uses of reinterpret cast.
<rdar://problem/16703656>
Swift SVN r18977
Instead for vardecls, we use the index of the field in the structdecl itself as
a stable ordering of vardecls.
I validated that the indeterminism was gone by running the failing test 1000
times in a row. Doug and I were hitting the indeterminism with well less than
100 iterations before, so I feel the number of iterations is sufficient.
Swift SVN r13859
This class allows you to deal with tuple and nominal projections in a way that
is agnostic of either of them.
Expect some incoming utilities based off of this for dealing with what I call
'aggregate type trees'.
Swift SVN r13735
