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IR: Remove dead code in metadata bitcode writing, NFC

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No one cares how many uses each metadata value has, so don't bother
counting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220337 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan P. N. Exon Smith 2014-10-21 22:13:34 +00:00
parent e539932aad
commit 9fa8641288
3 changed files with 12 additions and 16 deletions
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6
lib/Bitcode/Writer/BitcodeWriter.cpp
View File

@ -756,13 +756,13 @@ static void WriteMDNode(const MDNode *N,
static void WriteModuleMetadata(const Module *M,
const ValueEnumerator &VE,
BitstreamWriter &Stream) {
const ValueEnumerator::ValueList &Vals = VE.getMDValues();
const auto &Vals = VE.getMDValues();
bool StartedMetadataBlock = false;
unsigned MDSAbbrev = 0;
SmallVector<uint64_t, 64> Record;
for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
if (const MDNode *N = dyn_cast<MDNode>(Vals[i].first)) {
if (const MDNode *N = dyn_cast<MDNode>(Vals[i])) {
if (!N->isFunctionLocal() || !N->getFunction()) {
if (!StartedMetadataBlock) {
Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
@ -770,7 +770,7 @@ static void WriteModuleMetadata(const Module *M,
}
WriteMDNode(N, VE, Stream, Record);
}
} else if (const MDString *MDS = dyn_cast<MDString>(Vals[i].first)) {
} else if (const MDString *MDS = dyn_cast<MDString>(Vals[i])) {
if (!StartedMetadataBlock) {
Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);

18
lib/Bitcode/Writer/ValueEnumerator.cpp
View File

@ -509,12 +509,10 @@ void ValueEnumerator::EnumerateMetadata(const Value *MD) {
// Check to see if it's already in!
unsigned &MDValueID = MDValueMap[MD];
if (MDValueID) {
// Increment use count.
MDValues[MDValueID-1].second++;
if (MDValueID)
return;
}
MDValues.push_back(std::make_pair(MD, 1U));
MDValues.push_back(MD);
MDValueID = MDValues.size();
// Enumerate all non-function-local operands.
@ -533,12 +531,10 @@ void ValueEnumerator::EnumerateFunctionLocalMetadata(const MDNode *N) {
// Check to see if it's already in!
unsigned &MDValueID = MDValueMap[N];
if (MDValueID) {
// Increment use count.
MDValues[MDValueID-1].second++;
if (MDValueID)
return;
}
MDValues.push_back(std::make_pair(N, 1U));
MDValues.push_back(N);
MDValueID = MDValues.size();
// To incoroporate function-local information visit all function-local
@ -766,7 +762,7 @@ void ValueEnumerator::purgeFunction() {
for (unsigned i = NumModuleValues, e = Values.size(); i != e; ++i)
ValueMap.erase(Values[i].first);
for (unsigned i = NumModuleMDValues, e = MDValues.size(); i != e; ++i)
MDValueMap.erase(MDValues[i].first);
MDValueMap.erase(MDValues[i]);
for (unsigned i = 0, e = BasicBlocks.size(); i != e; ++i)
ValueMap.erase(BasicBlocks[i]);

4
lib/Bitcode/Writer/ValueEnumerator.h
View File

@ -58,7 +58,7 @@ private:
typedef UniqueVector<const Comdat *> ComdatSetType;
ComdatSetType Comdats;
ValueList MDValues;
std::vector<const Value *> MDValues;
SmallVector<const MDNode *, 8> FunctionLocalMDs;
ValueMapType MDValueMap;
@ -134,7 +134,7 @@ public:
}
const ValueList &getValues() const { return Values; }
const ValueList &getMDValues() const { return MDValues; }
const std::vector<const Value *> &getMDValues() const { return MDValues; }
const SmallVectorImpl<const MDNode *> &getFunctionLocalMDValues() const {
return FunctionLocalMDs;
}