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Remove a limited and somewhat questionable DenseMapInfo specialization

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for StringRef now that the core DenseMap library provides this facility.

llvm-svn: 240530
This commit is contained in:
Chandler Carruth 2015-06-24 10:24:30 +00:00
parent d7a32ea4b8
commit c026e39451
1 changed files with 0 additions and 14 deletions
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14
clang/lib/Basic/VirtualFileSystem.cpp
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@ -324,20 +324,6 @@ directory_iterator OverlayFileSystem::dir_begin(const Twine &Dir,
// VFSFromYAML implementation
//===-----------------------------------------------------------------------===/
// Allow DenseMap<StringRef, ...>. This is useful below because we know all the
// strings are literals and will outlive the map, and there is no reason to
// store them.
namespace llvm {
template<>
struct DenseMapInfo<StringRef> {
// This assumes that "" will never be a valid key.
static inline StringRef getEmptyKey() { return StringRef(""); }
static inline StringRef getTombstoneKey() { return StringRef(); }
static unsigned getHashValue(StringRef Val) { return HashString(Val); }
static bool isEqual(StringRef LHS, StringRef RHS) { return LHS == RHS; }
};
}
namespace {
enum EntryKind {