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Merge pull request #2345 from mbechard/master

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also search global sequences for live variables
This commit is contained in:
John Kessenich 2020-07-22 11:15:24 +07:00 committed by GitHub
commit 1c42d4ee7b
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2 changed files with 49 additions and 12 deletions
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38
glslang/MachineIndependent/LiveTraverser.h
View File

@ -74,14 +74,33 @@ public:
for (unsigned int f = 0; f < globals.size(); ++f) {
TIntermAggregate* candidate = globals[f]->getAsAggregate();
if (candidate && candidate->getOp() == EOpFunction && candidate->getName() == name) {
functions.push_back(candidate);
destinations.push_back(candidate);
break;
}
}
}
typedef std::list<TIntermAggregate*> TFunctionStack;
TFunctionStack functions;
void pushGlobalReference(const TString& name)
{
TIntermSequence& globals = intermediate.getTreeRoot()->getAsAggregate()->getSequence();
for (unsigned int f = 0; f < globals.size(); ++f) {
TIntermAggregate* candidate = globals[f]->getAsAggregate();
if (candidate && candidate->getOp() == EOpSequence &&
candidate->getSequence().size() == 1 &&
candidate->getSequence()[0]->getAsBinaryNode()) {
TIntermBinary* binary = candidate->getSequence()[0]->getAsBinaryNode();
TIntermSymbol* symbol = binary->getLeft()->getAsSymbolNode();
if (symbol && symbol->getQualifier().storage == EvqGlobal &&
symbol->getName() == name) {
destinations.push_back(candidate);
break;
}
}
}
}
typedef std::list<TIntermAggregate*> TDestinationStack;
TDestinationStack destinations;
protected:
// To catch which function calls are not dead, and hence which functions must be visited.
@ -117,16 +136,27 @@ protected:
// and only visit each function once.
void addFunctionCall(TIntermAggregate* call)
{
// // just use the map to ensure we process each function at most once
// just use the map to ensure we process each function at most once
if (liveFunctions.find(call->getName()) == liveFunctions.end()) {
liveFunctions.insert(call->getName());
pushFunction(call->getName());
}
}
void addGlobalReference(const TString& name)
{
// just use the map to ensure we process each global at most once
if (liveGlobals.find(name) == liveGlobals.end()) {
liveGlobals.insert(name);
pushGlobalReference(name);
}
}
const TIntermediate& intermediate;
typedef std::unordered_set<TString> TLiveFunctions;
TLiveFunctions liveFunctions;
typedef std::unordered_set<TString> TLiveGlobals;
TLiveGlobals liveGlobals;
bool traverseAll;
private:

23
glslang/MachineIndependent/iomapper.cpp
View File

@ -79,6 +79,11 @@ public:
target = &outputList;
else if (base->getQualifier().isUniformOrBuffer() && !base->getQualifier().isPushConstant())
target = &uniformList;
// If a global is being visited, then we should also traverse it incase it's evaluation
// ends up visiting inputs we want to tag as live
else if (base->getQualifier().storage == EvqGlobal)
addGlobalReference(base->getName());
if (target) {
TVarEntryInfo ent = {base->getId(), base, ! traverseAll};
ent.stage = intermediate.getStage();
@ -1105,11 +1110,12 @@ bool TIoMapper::addStage(EShLanguage stage, TIntermediate& intermediate, TInfoSi
TVarGatherTraverser iter_binding_live(intermediate, false, inVarMap, outVarMap, uniformVarMap);
root->traverse(&iter_binding_all);
iter_binding_live.pushFunction(intermediate.getEntryPointMangledName().c_str());
while (! iter_binding_live.functions.empty()) {
TIntermNode* function = iter_binding_live.functions.back();
iter_binding_live.functions.pop_back();
function->traverse(&iter_binding_live);
while (! iter_binding_live.destinations.empty()) {
TIntermNode* destination = iter_binding_live.destinations.back();
iter_binding_live.destinations.pop_back();
destination->traverse(&iter_binding_live);
}
// sort entries by priority. see TVarEntryInfo::TOrderByPriority for info.
std::for_each(inVarMap.begin(), inVarMap.end(),
[&inVector](TVarLivePair p) { inVector.push_back(p); });
@ -1200,11 +1206,12 @@ bool TGlslIoMapper::addStage(EShLanguage stage, TIntermediate& intermediate, TIn
*uniformVarMap[stage]);
root->traverse(&iter_binding_all);
iter_binding_live.pushFunction(intermediate.getEntryPointMangledName().c_str());
while (! iter_binding_live.functions.empty()) {
TIntermNode* function = iter_binding_live.functions.back();
iter_binding_live.functions.pop_back();
function->traverse(&iter_binding_live);
while (! iter_binding_live.destinations.empty()) {
TIntermNode* destination = iter_binding_live.destinations.back();
iter_binding_live.destinations.pop_back();
destination->traverse(&iter_binding_live);
}
TNotifyInOutAdaptor inOutNotify(stage, *resolver);
TNotifyUniformAdaptor uniformNotify(stage, *resolver);
// Resolve current stage input symbol location with previous stage output here,