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Move most type metadata lookups into their own readnone

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functions, and make those functions memoize the result.

This memoization can be both threadsafe and extremely
fast because of the memory ordering rules of the platforms
we're targeting: x86 is very permissive, and ARM has a
very convenient address-dependence rule which happens to
exactly match the semantics we need.

Swift SVN r20381
This commit is contained in:
John McCall
2014-07-23 07:38:26 +00:00
parent 81c1d084f7
commit 1ae1f750d0
22 changed files with 1558 additions and 35 deletions
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2
include/swift/Basic/DemangleNodes.def
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@@ -112,6 +112,8 @@ NODE(Type)
NODE(TypeAlias)
NODE(TypeList)
NODE(TypeMetadata)
NODE(TypeMetadataAccessFunction)
NODE(TypeMetadataLazyCache)
NODE(UncurriedFunctionType)
NODE(Unknown)
NODE(Unmanaged)