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GL_EXT_vulkan_glsl_relaxed - retarget gl_VertexID to gl_VertexIndex

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instead of allowing for multiple declarations of the variable in the
resulting SPIR-V, instead use a retargeted mechanism to cause references
to gl_VertexID and gl_InstanceID to use the gl_VertexIndex and
gl_InstanceIndex symbol.
This commit is contained in:
Malcolm Bechard 2021-09-16 17:40:49 -04:00
parent 80dcc36907
commit 05794b46a7
7 changed files with 133 additions and 59 deletions
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38
glslang/MachineIndependent/SymbolTable.cpp
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@ -279,8 +279,14 @@ TFunction::~TFunction()
//
TSymbolTableLevel::~TSymbolTableLevel()
{
for (tLevel::iterator it = level.begin(); it != level.end(); ++it)
delete (*it).second;
for (tLevel::iterator it = level.begin(); it != level.end(); ++it) {
const TString& name = it->first;
auto retargetIter = std::find_if(retargetedSymbols.begin(), retargetedSymbols.end(),
[&name](const std::pair<TString, TString>& i) { return i.first == name; });
if (retargetIter == retargetedSymbols.end())
delete (*it).second;
}
delete [] defaultPrecision;
}
@ -418,6 +424,15 @@ TSymbolTableLevel* TSymbolTableLevel::clone() const
TSymbolTableLevel *symTableLevel = new TSymbolTableLevel();
symTableLevel->anonId = anonId;
symTableLevel->thisLevel = thisLevel;
symTableLevel->retargetedSymbols.clear();
for (auto &s : retargetedSymbols) {
// Extra constructions to make sure they use the correct allocator pool
TString newFrom;
newFrom = s.first;
TString newTo;
newTo = s.second;
symTableLevel->retargetedSymbols.push_back({std::move(newFrom), std::move(newTo)});
}
std::vector<bool> containerCopied(anonId, false);
tLevel::const_iterator iter;
for (iter = level.begin(); iter != level.end(); ++iter) {
@ -433,8 +448,25 @@ TSymbolTableLevel* TSymbolTableLevel::clone() const
symTableLevel->insert(*container, false);
containerCopied[anon->getAnonId()] = true;
}
} else
} else {
const TString& name = iter->first;
auto retargetIter = std::find_if(retargetedSymbols.begin(), retargetedSymbols.end(),
[&name](const std::pair<TString, TString>& i) { return i.first == name; });
if (retargetIter != retargetedSymbols.end())
continue;
symTableLevel->insert(*iter->second->clone(), false);
}
}
// Now point retargeted symbols to the newly created versions of them
for (auto &s : retargetedSymbols) {
TSymbol* sym = symTableLevel->find(s.second);
if (!sym)
continue;
// Need to declare and assign so newS is using the correct pool allocator
TString newS;
newS = s.first;
symTableLevel->insert(newS, sym);
}
return symTableLevel;