The code would generate different diagnosics depending on
the cycle having length 1 or longer. The length 1 case
was broken if the path had a prefix that wasn't part
of the cycle, eg if we have C : A, A : A and visit C
first.
Swift SVN r28317
Replace the loop over all known protocols with a query into the
actual conformance lookup table, which more properly deals with
out-of-order conformance queries, inheritance of protocol
conformances, and conformance queries in multi-file situtations.
The SILGen test change is because we're no longer emitting redundant
conformances, while the slight diagnostic regression in
circular-inheritance cases is because we handle circular inheritance
very poorly throughout the compiler.
While not the end, this is a major step toward finishing
rdar://problem/18448811.
Swift SVN r26299
Most tests were using %swift or similar substitutions, which did not
include the target triple and SDK. The driver was defaulting to the
host OS. Thus, we could not run the tests when the standard library was
not built for OS X.
Swift SVN r24504
Break cycles agressively when we find circular class inheritance. The
stronger AST invariants prevent us from having to check for loops
everywhere in the front end.
Swift SVN r7325
