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Switch the TableGen record's string-based DenseMap key to use the new

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hashing infrastructure. I wonder why we don't just use StringMap here,
and I may revisit the issue if I have time, but for now I'm just trying
to consolidate.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152023 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth 2012-03-05 10:36:16 +00:00
parent 179bc7cb59
commit c78bd9ba6b
1 changed files with 11 additions and 5 deletions
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16
lib/TableGen/Record.cpp
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@ -18,6 +18,7 @@
#include "llvm/Support/Format.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/Hashing.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
@ -29,6 +30,8 @@ using namespace llvm;
// std::string wrapper for DenseMap purposes
//===----------------------------------------------------------------------===//
namespace llvm {
/// TableGenStringKey - This is a wrapper for std::string suitable for
/// using as a key to a DenseMap. Because there isn't a particularly
/// good way to indicate tombstone or empty keys for strings, we want
@ -43,14 +46,16 @@ public:
TableGenStringKey(const char *str) : data(str) {}
const std::string &str() const { return data; }
friend hash_code hash_value(const TableGenStringKey &Value) {
using llvm::hash_value;
return hash_value(Value.str());
}
private:
std::string data;
};
/// Specialize DenseMapInfo for TableGenStringKey.
namespace llvm {
template<> struct DenseMapInfo<TableGenStringKey> {
static inline TableGenStringKey getEmptyKey() {
TableGenStringKey Empty("<<<EMPTY KEY>>>");
@ -61,7 +66,8 @@ template<> struct DenseMapInfo<TableGenStringKey> {
return Tombstone;
}
static unsigned getHashValue(const TableGenStringKey& Val) {
return HashString(Val.str());
using llvm::hash_value;
return hash_value(Val);
}
static bool isEqual(const TableGenStringKey& LHS,
const TableGenStringKey& RHS) {
@ -69,7 +75,7 @@ template<> struct DenseMapInfo<TableGenStringKey> {
}
};
}
} // namespace llvm
//===----------------------------------------------------------------------===//
// Type implementations