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IRGen: EmptyBoxType's representation cannot be nil because of a conflict with extra inhabitant assumption in indirect enums (#10326)

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* IRGen: EmptyBoxType's representation cannot be nil because of a conflict with extra inhabitant assumption in indirect enums

We map nil to the .None case of Optional. Instead use a singleton object.

SR-5148
rdar://32618580
This commit is contained in:
Arnold Schwaighofer
2017-06-17 09:33:41 -07:00
committed by GitHub
parent 6f3b8ca60f
commit 48e889b51b
13 changed files with 113 additions and 5 deletions
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3
include/swift/Runtime/Metadata.h
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@@ -1761,6 +1761,9 @@ struct TargetHeapLocalVariableMetadata
static bool classof(const TargetMetadata<Runtime> *metadata) {
return metadata->getKind() == MetadataKind::HeapLocalVariable;
}
constexpr TargetHeapLocalVariableMetadata()
: TargetHeapMetadata<Runtime>(MetadataKind::HeapLocalVariable),
OffsetToFirstCapture(0), CaptureDescription(nullptr) {}
};
using HeapLocalVariableMetadata
= TargetHeapLocalVariableMetadata<InProcess>;