Merge pull request #2981 from lioncash/copy

gl_shader_decompiler: Minor cleanup-related changes

src/video_core/renderer_opengl/gl_shader_decompiler.cpp

@@ -1148,7 +1148,7 @@ private:
         for (const auto& variant : extras) {
             if (const auto argument = std::get_if<TextureArgument>(&variant)) {
                 expr += GenerateTextureArgument(*argument);
-            } else if (std::get_if<TextureAoffi>(&variant)) {
+            } else if (std::holds_alternative<TextureAoffi>(variant)) {
                 expr += GenerateTextureAoffi(meta->aoffi);
             } else {
                 UNREACHABLE();
@@ -1158,8 +1158,8 @@ private:
         return expr + ')';
     }
 
-    std::string GenerateTextureArgument(TextureArgument argument) {
+    std::string GenerateTextureArgument(const TextureArgument& argument) {
-        const auto [type, operand] = argument;
+        const auto& [type, operand] = argument;
         if (operand == nullptr) {
             return {};
         }
@@ -1235,7 +1235,7 @@ private:
 
     std::string BuildImageValues(Operation operation) {
         constexpr std::array constructors{"uint", "uvec2", "uvec3", "uvec4"};
-        const auto meta{std::get<MetaImage>(operation.GetMeta())};
+        const auto& meta{std::get<MetaImage>(operation.GetMeta())};
 
         const std::size_t values_count{meta.values.size()};
         std::string expr = fmt::format("{}(", constructors.at(values_count - 1));
@@ -1780,14 +1780,14 @@ private:
             return {"0", Type::Int};
         }
 
-        const auto meta{std::get<MetaImage>(operation.GetMeta())};
+        const auto& meta{std::get<MetaImage>(operation.GetMeta())};
         return {fmt::format("imageLoad({}, {}){}", GetImage(meta.image),
                             BuildIntegerCoordinates(operation), GetSwizzle(meta.element)),
                 Type::Uint};
     }
 
     Expression ImageStore(Operation operation) {
-        const auto meta{std::get<MetaImage>(operation.GetMeta())};
+        const auto& meta{std::get<MetaImage>(operation.GetMeta())};
         code.AddLine("imageStore({}, {}, {});", GetImage(meta.image),
                      BuildIntegerCoordinates(operation), BuildImageValues(operation));
         return {};
@@ -1795,7 +1795,7 @@ private:
 
     template <const std::string_view& opname>
     Expression AtomicImage(Operation operation) {
-        const auto meta{std::get<MetaImage>(operation.GetMeta())};
+        const auto& meta{std::get<MetaImage>(operation.GetMeta())};
         ASSERT(meta.values.size() == 1);
 
         return {fmt::format("imageAtomic{}({}, {}, {})", opname, GetImage(meta.image),
@@ -2246,7 +2246,7 @@ private:
         code.AddLine("#ifdef SAMPLER_{}_IS_BUFFER", sampler.GetIndex());
     }
 
-    std::string GetDeclarationWithSuffix(u32 index, const std::string& name) const {
+    std::string GetDeclarationWithSuffix(u32 index, std::string_view name) const {
         return fmt::format("{}_{}_{}", name, index, suffix);
     }
 
@@ -2271,17 +2271,15 @@ private:
     ShaderWriter code;
 };
 
-static constexpr std::string_view flow_var = "flow_var_";
-
 std::string GetFlowVariable(u32 i) {
-    return fmt::format("{}{}", flow_var, i);
+    return fmt::format("flow_var_{}", i);
 }
 
 class ExprDecompiler {
 public:
     explicit ExprDecompiler(GLSLDecompiler& decomp) : decomp{decomp} {}
 
-    void operator()(VideoCommon::Shader::ExprAnd& expr) {
+    void operator()(const ExprAnd& expr) {
         inner += "( ";
         std::visit(*this, *expr.operand1);
         inner += " && ";
@@ -2289,7 +2287,7 @@ public:
         inner += ')';
     }
 
-    void operator()(VideoCommon::Shader::ExprOr& expr) {
+    void operator()(const ExprOr& expr) {
         inner += "( ";
         std::visit(*this, *expr.operand1);
         inner += " || ";
@@ -2297,17 +2295,17 @@ public:
         inner += ')';
     }
 
-    void operator()(VideoCommon::Shader::ExprNot& expr) {
+    void operator()(const ExprNot& expr) {
         inner += '!';
         std::visit(*this, *expr.operand1);
     }
 
-    void operator()(VideoCommon::Shader::ExprPredicate& expr) {
+    void operator()(const ExprPredicate& expr) {
         const auto pred = static_cast<Tegra::Shader::Pred>(expr.predicate);
         inner += decomp.GetPredicate(pred);
     }
 
-    void operator()(VideoCommon::Shader::ExprCondCode& expr) {
+    void operator()(const ExprCondCode& expr) {
         const Node cc = decomp.ir.GetConditionCode(expr.cc);
         std::string target;
 
@@ -2329,15 +2327,15 @@ public:
         inner += target;
     }
 
-    void operator()(VideoCommon::Shader::ExprVar& expr) {
+    void operator()(const ExprVar& expr) {
         inner += GetFlowVariable(expr.var_index);
     }
 
-    void operator()(VideoCommon::Shader::ExprBoolean& expr) {
+    void operator()(const ExprBoolean& expr) {
         inner += expr.value ? "true" : "false";
     }
 
-    std::string& GetResult() {
+    const std::string& GetResult() const {
         return inner;
     }
 
@@ -2350,7 +2348,7 @@ class ASTDecompiler {
 public:
     explicit ASTDecompiler(GLSLDecompiler& decomp) : decomp{decomp} {}
 
-    void operator()(VideoCommon::Shader::ASTProgram& ast) {
+    void operator()(const ASTProgram& ast) {
         ASTNode current = ast.nodes.GetFirst();
         while (current) {
             Visit(current);
@@ -2358,7 +2356,7 @@ public:
         }
     }
 
-    void operator()(VideoCommon::Shader::ASTIfThen& ast) {
+    void operator()(const ASTIfThen& ast) {
         ExprDecompiler expr_parser{decomp};
         std::visit(expr_parser, *ast.condition);
         decomp.code.AddLine("if ({}) {{", expr_parser.GetResult());
@@ -2372,7 +2370,7 @@ public:
         decomp.code.AddLine("}}");
     }
 
-    void operator()(VideoCommon::Shader::ASTIfElse& ast) {
+    void operator()(const ASTIfElse& ast) {
         decomp.code.AddLine("else {{");
         decomp.code.scope++;
         ASTNode current = ast.nodes.GetFirst();
@@ -2384,29 +2382,29 @@ public:
         decomp.code.AddLine("}}");
     }
 
-    void operator()(VideoCommon::Shader::ASTBlockEncoded& ast) {
+    void operator()([[maybe_unused]] const ASTBlockEncoded& ast) {
         UNREACHABLE();
     }
 
-    void operator()(VideoCommon::Shader::ASTBlockDecoded& ast) {
+    void operator()(const ASTBlockDecoded& ast) {
         decomp.VisitBlock(ast.nodes);
     }
 
-    void operator()(VideoCommon::Shader::ASTVarSet& ast) {
+    void operator()(const ASTVarSet& ast) {
         ExprDecompiler expr_parser{decomp};
         std::visit(expr_parser, *ast.condition);
         decomp.code.AddLine("{} = {};", GetFlowVariable(ast.index), expr_parser.GetResult());
     }
 
-    void operator()(VideoCommon::Shader::ASTLabel& ast) {
+    void operator()(const ASTLabel& ast) {
         decomp.code.AddLine("// Label_{}:", ast.index);
     }
 
-    void operator()(VideoCommon::Shader::ASTGoto& ast) {
+    void operator()([[maybe_unused]] const ASTGoto& ast) {
         UNREACHABLE();
     }
 
-    void operator()(VideoCommon::Shader::ASTDoWhile& ast) {
+    void operator()(const ASTDoWhile& ast) {
         ExprDecompiler expr_parser{decomp};
         std::visit(expr_parser, *ast.condition);
         decomp.code.AddLine("do {{");
@@ -2420,7 +2418,7 @@ public:
         decomp.code.AddLine("}} while({});", expr_parser.GetResult());
     }
 
-    void operator()(VideoCommon::Shader::ASTReturn& ast) {
+    void operator()(const ASTReturn& ast) {
         const bool is_true = VideoCommon::Shader::ExprIsTrue(ast.condition);
         if (!is_true) {
             ExprDecompiler expr_parser{decomp};
@@ -2440,7 +2438,7 @@ public:
         }
     }
 
-    void operator()(VideoCommon::Shader::ASTBreak& ast) {
+    void operator()(const ASTBreak& ast) {
         const bool is_true = VideoCommon::Shader::ExprIsTrue(ast.condition);
         if (!is_true) {
             ExprDecompiler expr_parser{decomp};
@@ -2455,7 +2453,7 @@ public:
         }
     }
 
-    void Visit(VideoCommon::Shader::ASTNode& node) {
+    void Visit(const ASTNode& node) {
         std::visit(*this, *node->GetInnerData());
     }
 
@@ -2468,9 +2466,9 @@ void GLSLDecompiler::DecompileAST() {
     for (u32 i = 0; i < num_flow_variables; i++) {
         code.AddLine("bool {} = false;", GetFlowVariable(i));
     }
+
     ASTDecompiler decompiler{*this};
-    VideoCommon::Shader::ASTNode program = ir.GetASTProgram();
+    decompiler.Visit(ir.GetASTProgram());
-    decompiler.Visit(program);
 }
 
 } // Anonymous namespace

src/video_core/shader/node.h

@@ -410,7 +410,7 @@ public:
     explicit OperationNode(OperationCode code) : OperationNode(code, Meta{}) {}
 
     explicit OperationNode(OperationCode code, Meta meta)
-        : OperationNode(code, meta, std::vector<Node>{}) {}
+        : OperationNode(code, std::move(meta), std::vector<Node>{}) {}
 
     explicit OperationNode(OperationCode code, std::vector<Node> operands)
         : OperationNode(code, Meta{}, std::move(operands)) {}