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Support using DebugLoc's in a DenseMap.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128988 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky 2011-04-06 05:36:52 +00:00
parent 49460bc499
commit af4db5fc95
2 changed files with 44 additions and 0 deletions
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20
include/llvm/Support/DebugLoc.h
View File

@ -15,6 +15,8 @@
#ifndef LLVM_SUPPORT_DEBUGLOC_H
#define LLVM_SUPPORT_DEBUGLOC_H
#include "llvm/ADT/DenseMapInfo.h"
namespace llvm {
class MDNode;
class LLVMContext;
@ -23,6 +25,16 @@ namespace llvm {
/// and MachineInstr to compactly encode file/line/scope information for an
/// operation.
class DebugLoc {
friend struct DenseMapInfo<DebugLoc>;
/// getTombstoneKey() - A private constructor that returns an unknown that
/// is distinguishable from the usual one.
static DebugLoc getTombstoneKey() {
DebugLoc DL;
DL.LineCol = -1;
return DL;
}
/// LineCol - This 32-bit value encodes the line and column number for the
/// location, encoded as 24-bits for line and 8 bits for col. A value of 0
/// for either means unknown.
@ -75,6 +87,14 @@ namespace llvm {
}
bool operator!=(const DebugLoc &DL) const { return !(*this == DL); }
};
template <>
struct DenseMapInfo<DebugLoc> {
static DebugLoc getEmptyKey();
static DebugLoc getTombstoneKey();
static unsigned getHashValue(const DebugLoc &Key);
static bool isEqual(const DebugLoc &LHS, const DebugLoc &RHS);
};
} // end namespace llvm
#endif /* LLVM_DEBUGLOC_H */

24
lib/VMCore/DebugLoc.cpp
View File

@ -8,6 +8,7 @@
//===----------------------------------------------------------------------===//
#include "llvm/Support/DebugLoc.h"
#include "llvm/ADT/DenseMapInfo.h"
#include "LLVMContextImpl.h"
using namespace llvm;
@ -127,6 +128,29 @@ DebugLoc DebugLoc::getFromDILocation(MDNode *N) {
return get(LineNo, ColNo, Scope, dyn_cast_or_null<MDNode>(N->getOperand(3)));
}
//===----------------------------------------------------------------------===//
// DenseMap specialization
//===----------------------------------------------------------------------===//
DebugLoc DenseMapInfo<DebugLoc>::getEmptyKey() {
return DebugLoc();
}
DebugLoc DenseMapInfo<DebugLoc>::getTombstoneKey() {
return DebugLoc::getTombstoneKey();
}
unsigned DenseMapInfo<DebugLoc>::getHashValue(const DebugLoc &Key) {
FoldingSetNodeID ID;
ID.AddInteger(Key.LineCol);
ID.AddInteger(Key.ScopeIdx);
return ID.ComputeHash();
}
bool DenseMapInfo<DebugLoc>::isEqual(const DebugLoc &LHS, const DebugLoc &RHS) {
return LHS == RHS;
}
//===----------------------------------------------------------------------===//
// LLVMContextImpl Implementation
//===----------------------------------------------------------------------===//