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Add protocol witness tables to existential metatype

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layouts.  Introduce new SIL instructions to initialize
and open existential metatype values.

Don't actually, y'know, lift any of the restriction on
existential metatypes; just pointlessly burn extra
memory storing them.

Swift SVN r22592
This commit is contained in:
John McCall
2014-10-08 01:20:13 +00:00
parent d39d5702e9
commit 89e60f31aa
31 changed files with 1276 additions and 501 deletions
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2
lib/SILAnalysis/ValueTracking.cpp
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@@ -113,6 +113,7 @@ static bool isTransitiveEscapeInst(SILInstruction *Inst) {
case ValueKind::InitBlockStorageHeaderInst:
case ValueKind::InitEnumDataAddrInst:
case ValueKind::InitExistentialInst:
case ValueKind::InitExistentialMetatypeInst:
case ValueKind::InitExistentialRefInst:
case ValueKind::ObjCExistentialMetatypeToObjectInst:
case ValueKind::ObjCMetatypeToObjectInst:
@@ -122,6 +123,7 @@ static bool isTransitiveEscapeInst(SILInstruction *Inst) {
case ValueKind::UncheckedTrivialBitCastInst:
case ValueKind::UncheckedRefBitCastInst:
case ValueKind::OpenExistentialInst:
case ValueKind::OpenExistentialMetatypeInst:
case ValueKind::OpenExistentialRefInst:
case ValueKind::PartialApplyInst:
case ValueKind::PointerToAddressInst: