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glsl: Rework var alloc to not assign unused results

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This commit is contained in:
ameerj 2021-05-30 19:13:22 -04:00
parent 1269a0cf8b
commit 9f3ffb996b
9 changed files with 91 additions and 49 deletions
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17
src/shader_recompiler/backend/glsl/var_alloc.cpp
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@ -110,7 +110,6 @@ std::string VarAlloc::Define(IR::Inst& inst, GlslVarType type) {
} else {
Id id{};
id.type.Assign(type);
// id.is_null.Assign(1);
GetUseTracker(type).uses_temp = true;
inst.SetDefinition<Id>(id);
}
@ -121,6 +120,20 @@ std::string VarAlloc::Define(IR::Inst& inst, IR::Type type) {
return Define(inst, RegType(type));
}
std::string VarAlloc::PhiDefine(IR::Inst& inst, IR::Type type) {
return AddDefine(inst, RegType(type));
}
std::string VarAlloc::AddDefine(IR::Inst& inst, GlslVarType type) {
if (inst.HasUses()) {
inst.SetDefinition<Id>(Alloc(type));
return Representation(inst.Definition<Id>());
} else {
return "";
}
return Representation(inst.Definition<Id>());
}
std::string VarAlloc::Consume(const IR::Value& value) {
return value.IsImmediate() ? MakeImm(value) : ConsumeInst(*value.InstRecursive());
}
@ -223,6 +236,8 @@ VarAlloc::UseTracker& VarAlloc::GetUseTracker(GlslVarType type) {
switch (type) {
case GlslVarType::U1:
return var_bool;
case GlslVarType::F16x2:
return var_f16x2;
case GlslVarType::U32:
return var_u32;
case GlslVarType::S32: