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Properly flag opaque existential types as not being

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bitwise-takable.

Swift SVN r20803
This commit is contained in:
John McCall
2014-07-31 02:03:56 +00:00
parent 36a27a61a4
commit c367362f22
5 changed files with 106 additions and 6 deletions
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3
stdlib/runtime/Metadata.cpp
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@@ -26,7 +26,6 @@
#include <cctype>
#include <dispatch/dispatch.h>
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/Hashing.h"
#include "ExistentialMetadataImpl.h"
#include "Debug.h"
@@ -1497,6 +1496,7 @@ getOpaqueExistentialValueWitnesses(unsigned numWitnessTables) {
vwt->flags = ValueWitnessFlags()
.withAlignment(Box::Container::getAlignment(numWitnessTables))
.withPOD(false)
.withBitwiseTakable(false)
.withInlineStorage(false)
.withExtraInhabitants(false);
vwt->stride = Box::Container::getStride(numWitnessTables);
@@ -1547,6 +1547,7 @@ getClassExistentialValueWitnesses(unsigned numWitnessTables) {
vwt->flags = ValueWitnessFlags()
.withAlignment(Box::Container::getAlignment(numWitnessTables))
.withPOD(false)
.withBitwiseTakable(true)
.withInlineStorage(false)
.withExtraInhabitants(true);
vwt->stride = Box::Container::getStride(numWitnessTables);