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CodeGen: Factor out some of the bitset entry creation code. NFC.

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llvm-svn: 239927
This commit is contained in:
Peter Collingbourne
2015-06-17 19:08:05 +00:00
parent 3d920eed5d
commit 86d34a72b3
3 changed files with 23 additions and 18 deletions
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22
clang/lib/CodeGen/CGVTables.cpp
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@@ -848,7 +848,8 @@ void CodeGenModule::EmitVTableBitSetEntries(llvm::GlobalVariable *VTable,
!LangOpts.Sanitize.has(SanitizerKind::CFIUnrelatedCast))
return;
llvm::Metadata *VTableMD = llvm::ConstantAsMetadata::get(VTable);
CharUnits PointerWidth =
Context.toCharUnitsFromBits(Context.getTargetInfo().getPointerWidth(0));
std::vector<llvm::MDTuple *> BitsetEntries;
// Create a bit set entry for each address point.
@@ -857,23 +858,8 @@ void CodeGenModule::EmitVTableBitSetEntries(llvm::GlobalVariable *VTable,
if (AP.first.getBase()->isInStdNamespace())
continue;
std::string OutName;
llvm::raw_string_ostream Out(OutName);
getCXXABI().getMangleContext().mangleCXXVTableBitSet(AP.first.getBase(),
Out);
CharUnits PointerWidth =
Context.toCharUnitsFromBits(Context.getTargetInfo().getPointerWidth(0));
uint64_t AddrPointOffset = AP.second * PointerWidth.getQuantity();
llvm::Metadata *BitsetOps[] = {
llvm::MDString::get(getLLVMContext(), Out.str()),
VTableMD,
llvm::ConstantAsMetadata::get(
llvm::ConstantInt::get(Int64Ty, AddrPointOffset))};
llvm::MDTuple *BitsetEntry =
llvm::MDTuple::get(getLLVMContext(), BitsetOps);
BitsetEntries.push_back(BitsetEntry);
BitsetEntries.push_back(CreateVTableBitSetEntry(
VTable, PointerWidth * AP.second, AP.first.getBase()));
}
// Sort the bit set entries for determinism.