[Type checker] Delete unnecessary, bogus optimization for initializers. #9483
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An early optimization in constraint generation attempted to simplify type construction (e.g., X(...)) when the type in question has no failable initializers. However, the optimization didn't appropriately clear out the cached bit when new information became available (e.g., new conformances, new extensions), and didn't seem to help anything performance-wise (type-checking times didn't increase at all when I turned this off). Fixes rdar://problem/30588177.
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@swift-ci please smoke test and merge |
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An early optimization in constraint generation attempted to simplify
type construction (e.g., X(...)) when the type in question has no
failable initializers. However, the optimization didn't appropriately
clear out the cached bit when new information became available (e.g.,
new conformances, new extensions), and didn't seem to help anything
performance-wise (type-checking times didn't increase at all when I
turned this off).
Fixes rdar://problem/30588177.