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Avoid malloc allocations in the runtime, part 2 #23249

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merged 7 commits into from
Mar 14, 2019
+579 −728
Merged

Avoid malloc allocations in the runtime, part 2 #23249

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4186c69
runtime: Fix a compiler warning in release the build
eeckstein Mar 8, 2019
64d5f4c
Demangler: remove a dead function.
eeckstein Mar 8, 2019
708b2ac
Remangler: remove support for mangling function specializations in th…
eeckstein Mar 11, 2019
abccbd8
runtime: make the old remangler allocation free.
eeckstein Mar 11, 2019
0528d8a
OldRemangler: cleanup and simplification of mangleIdentifier
eeckstein Mar 11, 2019
3c73685
runtime: avoid memory allocations in checkTransitiveCompleteness
eeckstein Mar 12, 2019
c6abbfa
Remangler: don't construct a std::string for hashing and comparing id…
eeckstein Mar 12, 2019
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22 changes: 14 additions & 8 deletions include/swift/Demangling/Demangle.h
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Original file line number Diff line number Diff line change
Expand Up @@ -484,11 +484,6 @@ enum class OperatorKind {
Infix,
};

/// Mangle an identifier using Swift's mangling rules.
void mangleIdentifier(const char *data, size_t length,
OperatorKind operatorKind, std::string &out,
bool usePunycode = true);

/// Remangle a demangled parse tree.
std::string mangleNode(NodePointer root);

Expand All @@ -511,9 +506,20 @@ llvm::StringRef mangleNode(NodePointer root, SymbolicResolver resolver,
/// Remangle in the old mangling scheme.
///
/// This is only used for objc-runtime names.
/// If \p BorrowFrom is specified, the initial bump pointer memory is
/// borrowed from the free memory of BorrowFrom.
std::string mangleNodeOld(NodePointer root, NodeFactory *BorrowFrom = nullptr);
std::string mangleNodeOld(NodePointer root);

/// Remangle in the old mangling scheme.
///
/// This is only used for objc-runtime names.
/// The returned string is owned by \p Factory. This means \p Factory must stay
/// alive as long as the returned string is used.
llvm::StringRef mangleNodeOld(NodePointer node, NodeFactory &Factory);

/// Remangle in the old mangling scheme and embed the name in "_Tt<name>_".
///
/// The returned string is null terminated and owned by \p Factory. This means
/// \p Factory must stay alive as long as the returned string is used.
const char *mangleNodeAsObjcCString(NodePointer node, NodeFactory &Factory);

/// Transform the node structure to a string.
///
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