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glsl: Allow dynamic tracking of variable allocation

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This commit is contained in:
ameerj 2021-06-07 18:04:01 -04:00
parent 1017c12427
commit 3319879b23
3 changed files with 35 additions and 21 deletions
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17
src/shader_recompiler/backend/glsl/emit_glsl.cpp
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@ -172,19 +172,28 @@ std::string GlslVersionSpecifier(const EmitContext& ctx) {
return "";
}
bool IsPreciseType(GlslVarType type) {
switch (type) {
case GlslVarType::PrecF32:
case GlslVarType::PrecF64:
return true;
default:
return false;
}
}
void DefineVariables(const EmitContext& ctx, std::string& header) {
for (u32 i = 0; i < static_cast<u32>(GlslVarType::Void); ++i) {
const auto type{static_cast<GlslVarType>(i)};
const auto& tracker{ctx.var_alloc.GetUseTracker(type)};
const auto type_name{ctx.var_alloc.GetGlslType(type)};
const auto precise{
(type == GlslVarType::PrecF32 || type == GlslVarType::PrecF64) ? "precise " : ""};
const auto precise{IsPreciseType(type) ? "precise " : ""};
// Temps/return types that are never used are stored at index 0
if (tracker.uses_temp) {
header += fmt::format("{}{} {}={}(0);", precise, type_name,
header += fmt::format("{}{} t{}={}(0);", precise, type_name,
ctx.var_alloc.Representation(0, type), type_name);
}
for (u32 index = 1; index <= tracker.num_used; ++index) {
for (u32 index = 0; index < tracker.num_used; ++index) {
header += fmt::format("{}{} {}={}(0);", precise, type_name,
ctx.var_alloc.Representation(index, type), type_name);
}