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Cache the memoization data for DynTypedNodes. 

Summary:
Cache the memoization data for DynTypedNodes.
It is free to do so on create(), but expensive to determine dynamically.

Reviewers: klimek

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D5101

llvm-svn: 216671
This commit is contained in:
Samuel Benzaquen 2014-08-28 15:49:06 +00:00
parent a9882cee50
commit e2c034c124
1 changed files with 5 additions and 14 deletions
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19
clang/include/clang/AST/ASTTypeTraits.h
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@ -189,7 +189,7 @@ public:
/// Note that this is not supported by all AST nodes. For AST nodes
/// that don't have a pointer-defined identity inside the AST, this
/// method returns NULL.
const void *getMemoizationData() const;
const void *getMemoizationData() const { return MemoizationData; }
/// \brief Prints the node to the given output stream.
void print(llvm::raw_ostream &OS, const PrintingPolicy &PP) const;
@ -242,6 +242,7 @@ private:
static DynTypedNode create(const BaseT &Node) {
DynTypedNode Result;
Result.NodeKind = ASTNodeKind::getFromNodeKind<T>();
Result.MemoizationData = &Node;
new (Result.Storage.buffer) const BaseT * (&Node);
return Result;
}
@ -257,6 +258,7 @@ private:
static DynTypedNode create(const T &Node) {
DynTypedNode Result;
Result.NodeKind = ASTNodeKind::getFromNodeKind<T>();
Result.MemoizationData = &Node;
new (Result.Storage.buffer) const T * (&Node);
return Result;
}
@ -272,12 +274,14 @@ private:
static DynTypedNode create(const T &Node) {
DynTypedNode Result;
Result.NodeKind = ASTNodeKind::getFromNodeKind<T>();
Result.MemoizationData = nullptr;
new (Result.Storage.buffer) T(Node);
return Result;
}
};
ASTNodeKind NodeKind;
const void *MemoizationData;
/// \brief Stores the data of the node.
///
@ -345,19 +349,6 @@ template <typename T, typename EnablerT> struct DynTypedNode::BaseConverter {
}
};
inline const void *DynTypedNode::getMemoizationData() const {
if (ASTNodeKind::getFromNodeKind<Decl>().isBaseOf(NodeKind)) {
return BaseConverter<Decl>::get(NodeKind, Storage.buffer);
} else if (ASTNodeKind::getFromNodeKind<Stmt>().isBaseOf(NodeKind)) {
return BaseConverter<Stmt>::get(NodeKind, Storage.buffer);
} else if (ASTNodeKind::getFromNodeKind<Type>().isBaseOf(NodeKind)) {
return BaseConverter<Type>::get(NodeKind, Storage.buffer);
} else if (ASTNodeKind::getFromNodeKind<NestedNameSpecifier>().isBaseOf(NodeKind)) {
return BaseConverter<NestedNameSpecifier>::get(NodeKind, Storage.buffer);
}
return nullptr;
}
} // end namespace ast_type_traits
} // end namespace clang