const ValueEnumerator &VE,
BitstreamWriter &Stream) {
const auto &MDs = VE.getMDs();
- bool StartedMetadataBlock = false;
+ if (MDs.empty() && M->named_metadata_empty())
+ return;
+
+ Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
+
unsigned MDSAbbrev = 0;
+ if (VE.hasMDString()) {
+ // Abbrev for METADATA_STRING.
+ BitCodeAbbrev *Abbv = new BitCodeAbbrev();
+ Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_STRING));
+ Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
+ Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
+ MDSAbbrev = Stream.EmitAbbrev(Abbv);
+ }
+
SmallVector<uint64_t, 64> Record;
for (unsigned i = 0, e = MDs.size(); i != e; ++i) {
if (const MDNode *N = dyn_cast<MDNode>(MDs[i])) {
- if (!StartedMetadataBlock) {
- Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
- StartedMetadataBlock = true;
- }
WriteMDNode(N, VE, Stream, Record);
- } else if (const auto *MDC = dyn_cast<ConstantAsMetadata>(MDs[i])) {
- if (!StartedMetadataBlock) {
- Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
- StartedMetadataBlock = true;
- }
+ continue;
+ }
+ if (const auto *MDC = dyn_cast<ConstantAsMetadata>(MDs[i])) {
WriteValueAsMetadata(MDC, VE, Stream, Record);
- } else if (const MDString *MDS = dyn_cast<MDString>(MDs[i])) {
- if (!StartedMetadataBlock) {
- Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
-
- // Abbrev for METADATA_STRING.
- BitCodeAbbrev *Abbv = new BitCodeAbbrev();
- Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_STRING));
- Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
- Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
- MDSAbbrev = Stream.EmitAbbrev(Abbv);
- StartedMetadataBlock = true;
- }
-
- // Code: [strchar x N]
- Record.append(MDS->bytes_begin(), MDS->bytes_end());
-
- // Emit the finished record.
- Stream.EmitRecord(bitc::METADATA_STRING, Record, MDSAbbrev);
- Record.clear();
+ continue;
}
+ const MDString *MDS = cast<MDString>(MDs[i]);
+ // Code: [strchar x N]
+ Record.append(MDS->bytes_begin(), MDS->bytes_end());
+
+ // Emit the finished record.
+ Stream.EmitRecord(bitc::METADATA_STRING, Record, MDSAbbrev);
+ Record.clear();
}
// Write named metadata.
for (Module::const_named_metadata_iterator I = M->named_metadata_begin(),
E = M->named_metadata_end(); I != E; ++I) {
const NamedMDNode *NMD = I;
- if (!StartedMetadataBlock) {
- Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
- StartedMetadataBlock = true;
- }
// Write name.
StringRef Str = NMD->getName();
Record.clear();
}
- if (StartedMetadataBlock)
- Stream.ExitBlock();
+ Stream.ExitBlock();
}
static void WriteFunctionLocalMetadata(const Function &F,
SmallVector<const LocalAsMetadata *, 8> FunctionLocalMDs;
typedef DenseMap<const Metadata *, unsigned> MetadataMapType;
MetadataMapType MDValueMap;
+ bool HasMDString;
typedef DenseMap<AttributeSet, unsigned> AttributeGroupMapType;
AttributeGroupMapType AttributeGroupMap;
unsigned getValueID(const Value *V) const;
unsigned getMetadataID(const Metadata *V) const;
+ bool hasMDString() const { return HasMDString; }
+
unsigned getTypeID(Type *T) const {
TypeMapType::const_iterator I = TypeMap.find(T);
assert(I != TypeMap.end() && "Type not in ValueEnumerator!");