Shader_IR: Address feedback.

src/video_core/guest_driver.h

@@ -33,6 +33,7 @@ private:
     // This goes with Vulkan and OpenGL standards but Nvidia GPUs can easily
     // use 4 bytes instead. Thus, certain drivers may squish the size.
     static constexpr u32 default_texture_handler_size = 8;
+
     u32 texture_handler_size = default_texture_handler_size;
     bool texture_handler_size_deduced = false;
 };

src/video_core/renderer_opengl/gl_shader_decompiler.cpp

@@ -505,11 +505,11 @@ private:
     }
 
     void DeclareCustomVariables() {
-        const u32 cv_num = ir.GetCustomVariablesAmount();
-        for (u32 i = 0; i < cv_num; ++i) {
+        const u32 num_custom_variables = ir.GetNumCustomVariables();
+        for (u32 i = 0; i < num_custom_variables; ++i) {
             code.AddLine("float {} = 0.0f;", GetCustomVariable(i));
         }
-        if (cv_num > 0) {
+        if (num_custom_variables > 0) {
             code.AddNewLine();
         }
     }

src/video_core/renderer_vulkan/vk_shader_decompiler.cpp

@@ -589,8 +589,8 @@ private:
     }
 
     void DeclareCustomVariables() {
-        const u32 cv_num = ir.GetCustomVariablesAmount();
-        for (u32 i = 0; i < cv_num; ++i) {
+        const u32 num_custom_variables = ir.GetNumCustomVariables();
+        for (u32 i = 0; i < num_custom_variables; ++i) {
             const Id id = OpVariable(t_prv_float, spv::StorageClass::Private, v_float_zero);
             Name(id, fmt::format("custom_var_{}", i));
             custom_variables.emplace(i, AddGlobalVariable(id));
@@ -1363,6 +1363,7 @@ private:
 
         } else if (const auto cv = std::get_if<CustomVarNode>(&*dest)) {
             target = {custom_variables.at(cv->GetIndex()), Type::Float};
+
         } else {
             UNIMPLEMENTED();
         }

src/video_core/shader/const_buffer_locker.h

@@ -77,10 +77,12 @@ public:
         return bindless_samplers;
     }
 
+    /// Gets bound buffer used on this shader
     u32 GetBoundBuffer() const {
         return bound_buffer;
     }
 
+    /// Obtains access to the guest driver's profile.
     VideoCore::GuestDriverProfile* AccessGuestDriverProfile() const {
         if (engine) {
             return &engine->AccessGuestDriverProfile();

src/video_core/shader/decode.cpp

@@ -35,9 +35,9 @@ constexpr bool IsSchedInstruction(u32 offset, u32 main_offset) {
 }
 
 void DeduceTextureHandlerSize(VideoCore::GuestDriverProfile* gpu_driver,
-                              std::list<Sampler>& used_samplers) {
+                              const std::list<Sampler>& used_samplers) {
     if (gpu_driver == nullptr) {
-        LOG_CRITICAL(HW_GPU, "GPU Driver profile has not been created yet");
+        LOG_CRITICAL(HW_GPU, "GPU driver profile has not been created yet");
         return;
     }
     if (gpu_driver->TextureHandlerSizeKnown() || used_samplers.size() <= 1) {
@@ -57,9 +57,9 @@ void DeduceTextureHandlerSize(VideoCore::GuestDriverProfile* gpu_driver,
     }
 }
 
-std::optional<u32> TryDeduceSamplerSize(Sampler& sampler_to_deduce,
+std::optional<u32> TryDeduceSamplerSize(const Sampler& sampler_to_deduce,
                                         VideoCore::GuestDriverProfile* gpu_driver,
-                                        std::list<Sampler>& used_samplers) {
+                                        const std::list<Sampler>& used_samplers) {
     if (gpu_driver == nullptr) {
         LOG_CRITICAL(HW_GPU, "GPU Driver profile has not been created yet");
         return std::nullopt;
@@ -367,17 +367,18 @@ void ShaderIR::PostDecode() {
     auto gpu_driver = locker.AccessGuestDriverProfile();
     DeduceTextureHandlerSize(gpu_driver, used_samplers);
     // Deduce Indexed Samplers
-    if (uses_indexed_samplers) {
-        for (auto& sampler : used_samplers) {
-            if (sampler.IsIndexed()) {
-                auto size = TryDeduceSamplerSize(sampler, gpu_driver, used_samplers);
-                if (size) {
-                    sampler.SetSize(*size);
-                } else {
-                    LOG_CRITICAL(HW_GPU, "Failed to deduce size of indexed sampler");
-                    sampler.SetSize(1);
-                }
-            }
+    if (!uses_indexed_samplers) {
+        return;
+    }
+    for (auto& sampler : used_samplers) {
+        if (!sampler.IsIndexed()) {
+            continue;
+        }
+        if (const auto size = TryDeduceSamplerSize(sampler, gpu_driver, used_samplers)) {
+            sampler.SetSize(*size);
+        } else {
+            LOG_CRITICAL(HW_GPU, "Failed to deduce size of indexed sampler");
+            sampler.SetSize(1);
         }
     }
 }

src/video_core/shader/decode/texture.cpp

@@ -201,7 +201,8 @@ u32 ShaderIR::DecodeTexture(NodeBlock& bb, u32 pc) {
         }
 
         for (u32 element = 0; element < values.size(); ++element) {
-            MetaTexture meta{*sampler, array_node, {}, {}, {}, derivates, {}, {}, {}, element, index_var};
+            MetaTexture meta{*sampler, array_node, {}, {},      {},       derivates,
+                             {},       {},         {}, element, index_var};
             values[element] = Operation(OperationCode::TextureGradient, std::move(meta), coords);
         }
 

src/video_core/shader/node.h

@@ -291,7 +291,7 @@ public:
         return size;
     }
 
-    void SetSize(u32 new_size) {
+    constexpr void SetSize(u32 new_size) {
         size = new_size;
     }
 
@@ -315,15 +315,15 @@ public:
     explicit ArraySamplerNode(u32 index, u32 base_offset, u32 bindless_var)
         : index{index}, base_offset{base_offset}, bindless_var{bindless_var} {}
 
-    u32 GetIndex() const {
+    constexpr u32 GetIndex() const {
         return index;
     }
 
-    u32 GetBaseOffset() const {
+    constexpr u32 GetBaseOffset() const {
         return base_offset;
     }
 
-    u32 GetIndexVar() const {
+    constexpr u32 GetIndexVar() const {
         return bindless_var;
     }
 
@@ -338,11 +338,11 @@ class BindlessSamplerNode final {
 public:
     explicit BindlessSamplerNode(u32 index, u32 offset) : index{index}, offset{offset} {}
 
-    u32 GetIndex() const {
+    constexpr u32 GetIndex() const {
         return index;
     }
 
-    u32 GetOffset() const {
+    constexpr u32 GetOffset() const {
         return offset;
     }
 
@@ -557,7 +557,7 @@ class CustomVarNode final {
 public:
     explicit constexpr CustomVarNode(u32 index) : index{index} {}
 
-    u32 GetIndex() const {
+    constexpr u32 GetIndex() const {
         return index;
     }
 

src/video_core/shader/shader_ir.cpp

@@ -458,8 +458,7 @@ std::size_t ShaderIR::DeclareAmend(Node new_amend) {
 }
 
 u32 ShaderIR::NewCustomVariable() {
-    const u32 id = num_custom_variables++;
-    return id;
+    return num_custom_variables++;
 }
 
 } // namespace VideoCommon::Shader

src/video_core/shader/shader_ir.h

@@ -180,7 +180,7 @@ public:
         return amend_code[index];
     }
 
-    u32 GetCustomVariablesAmount() const {
+    u32 GetNumCustomVariables() const {
         return num_custom_variables;
     }
 

src/video_core/shader/track.cpp

@@ -36,7 +36,6 @@ std::pair<Node, s64> FindOperation(const NodeBlock& code, s64 cursor,
     }
     return {};
 }
-} // Anonymous namespace
 
 std::optional<std::pair<Node, Node>> DecoupleIndirectRead(const OperationNode& operation) {
     if (operation.GetCode() != OperationCode::UAdd) {
@@ -44,9 +43,7 @@ std::optional<std::pair<Node, Node>> DecoupleIndirectRead(const OperationNode& o
     }
     Node gpr{};
     Node offset{};
-    if (operation.GetOperandsCount() != 2) {
-        return std::nullopt;
-    }
+    ASSERT(operation.GetOperandsCount() == 2);
     for (std::size_t i = 0; i < operation.GetOperandsCount(); i++) {
         Node operand = operation[i];
         if (std::holds_alternative<ImmediateNode>(*operand)) {
@@ -56,7 +53,7 @@ std::optional<std::pair<Node, Node>> DecoupleIndirectRead(const OperationNode& o
         }
     }
     if (offset && gpr) {
-        return {std::make_pair(gpr, offset)};
+        return std::make_pair(gpr, offset);
     }
     return std::nullopt;
 }
@@ -72,6 +69,8 @@ bool AmendNodeCv(std::size_t amend_index, Node node) {
     return false;
 }
 
+} // Anonymous namespace
+
 std::tuple<Node, TrackSampler> ShaderIR::TrackBindlessSampler(Node tracked, const NodeBlock& code,
                                                               s64 cursor) {
     if (const auto cbuf = std::get_if<CbufNode>(&*tracked)) {