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IRGen: Rename bitsets -> type metadata. NFC. 

"Type metadata" is the term that we've been using for the CFI-related
information on vtables for a while now.

llvm-svn: 333602
This commit is contained in:
Peter Collingbourne 2018-05-30 22:29:08 +00:00
parent 485762ccba
commit ac94ca54c5
1 changed files with 16 additions and 17 deletions
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33
clang/lib/CodeGen/CGVTables.cpp
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@ -1012,31 +1012,30 @@ void CodeGenModule::EmitVTableTypeMetadata(llvm::GlobalVariable *VTable,
CharUnits PointerWidth =
Context.toCharUnitsFromBits(Context.getTargetInfo().getPointerWidth(0));
typedef std::pair<const CXXRecordDecl *, unsigned> BSEntry;
std::vector<BSEntry> BitsetEntries;
// Create a bit set entry for each address point.
typedef std::pair<const CXXRecordDecl *, unsigned> TypeMetadata;
std::vector<TypeMetadata> TypeMetadatas;
// Create type metadata for each address point.
for (auto &&AP : VTLayout.getAddressPoints())
BitsetEntries.push_back(
std::make_pair(AP.first.getBase(),
VTLayout.getVTableOffset(AP.second.VTableIndex) +
AP.second.AddressPointIndex));
TypeMetadatas.push_back(std::make_pair(
AP.first.getBase(), VTLayout.getVTableOffset(AP.second.VTableIndex) +
AP.second.AddressPointIndex));
// Sort the bit set entries for determinism.
llvm::sort(BitsetEntries.begin(), BitsetEntries.end(),
[this](const BSEntry &E1, const BSEntry &E2) {
if (&E1 == &E2)
// Sort the type metadata for determinism.
llvm::sort(TypeMetadatas.begin(), TypeMetadatas.end(),
[this](const TypeMetadata &M1, const TypeMetadata &M2) {
if (&M1 == &M2)
return false;
std::string S1;
llvm::raw_string_ostream O1(S1);
getCXXABI().getMangleContext().mangleTypeName(
QualType(E1.first->getTypeForDecl(), 0), O1);
QualType(M1.first->getTypeForDecl(), 0), O1);
O1.flush();
std::string S2;
llvm::raw_string_ostream O2(S2);
getCXXABI().getMangleContext().mangleTypeName(
QualType(E2.first->getTypeForDecl(), 0), O2);
QualType(M2.first->getTypeForDecl(), 0), O2);
O2.flush();
if (S1 < S2)
@ -1044,10 +1043,10 @@ void CodeGenModule::EmitVTableTypeMetadata(llvm::GlobalVariable *VTable,
if (S1 != S2)
return false;
return E1.second < E2.second;
return M1.second < M2.second;
});
for (auto BitsetEntry : BitsetEntries)
AddVTableTypeMetadata(VTable, PointerWidth * BitsetEntry.second,
BitsetEntry.first);
for (auto TypeMetadata : TypeMetadatas)
AddVTableTypeMetadata(VTable, PointerWidth * TypeMetadata.second,
TypeMetadata.first);
}