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[serialization] Blaze a straight-line path for no-arg constructors.

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Ignore everything else. Unfortunately, even this requires VarDecls...

Swift SVN r5531
This commit is contained in:
Jordan Rose
2013-06-08 00:18:22 +00:00
parent 413b2ae485
commit 8bd38abdff
3 changed files with 110 additions and 6 deletions
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56
lib/Serialization/ModuleFile.cpp
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@@ -149,13 +149,59 @@ Decl *ModuleFile::getDecl(DeclID DID) {
return nullptr;
}
declOrOffset = new (ctx) StructDecl(SourceLoc(), ctx.getIdentifier(name),
SourceLoc(), /*inherited=*/{},
/*generic params=*/nullptr,
ModuleContext);
ArrayRef<uint64_t> memberIDs;
auto entry = DeclTypeCursor.advance();
if (entry.Kind != llvm::BitstreamEntry::Record)
return {};
StringRef blobData;
SmallVector<uint64_t, 16> memberIDBuffer;
unsigned recordID = DeclTypeCursor.readRecord(entry.ID, memberIDBuffer,
&blobData);
if (recordID != decls_block::DECL_CONTEXT) {
error();
return nullptr;
}
decls_block::DeclContextLayout::readRecord(memberIDBuffer, memberIDs);
auto theStruct = new (ctx) StructDecl(SourceLoc(), ctx.getIdentifier(name),
SourceLoc(), /*inherited=*/{},
/*generic params=*/nullptr,
ModuleContext);
declOrOffset = theStruct;
if (!memberIDs.empty()) {
MutableArrayRef<Decl *> members(ctx.Allocate<Decl *>(memberIDs.size()),
memberIDs.size());
auto nextMember = members.begin();
for (auto rawID : memberIDBuffer) {
*nextMember = getDecl(rawID);
++nextMember;
}
theStruct->setMembers(members, SourceRange());
}
break;
}
case decls_block::CONSTRUCTOR_DECL: {
bool isImplicit;
DeclID implicitThisID;
decls_block::ConstructorLayout::readRecord(scratch, isImplicit,
implicitThisID);
auto thisDecl = cast<VarDecl>(getDecl(implicitThisID));
auto parent = thisDecl->getType()->getAnyNominal();
auto emptyArgs = TuplePattern::create(ctx, SourceLoc(), {}, SourceLoc());
declOrOffset = new (ctx) ConstructorDecl(ctx.getIdentifier("constructor"),
SourceLoc(), emptyArgs, thisDecl,
/*generic params=*/nullptr,
parent);
break;
}
default:
// We don't know how to deserialize this kind of decl.
error();