FUCK YOUUUUUUUUUUUUUUUUUU

src/video_core/renderer_vulkan/fixed_pipeline_state.cpp

@@ -116,11 +116,13 @@ void FixedPipelineState::Refresh(Tegra::Engines::Maxwell3D& maxwell3d, DynamicFe
             // We sparsely store the bits for each of them, so if they clash we don't deal
             // with the fixed pipeline taking in invalid vertices! :)
             const auto& attrs = regs.vertex_attrib_format;
-            attribute_types[0] = attribute_types[1] = attribute_types[2] = attribute_types[3] = 0;
+            attribute_types[0] = 0;
+            attribute_types[1] = 0;
+            attribute_types[2] = 0;
             static_assert(Maxwell::NumVertexAttributes == 32);
             for (size_t i = 0; i < Maxwell::NumVertexAttributes; ++i) {
                 u32 const mask = attrs[i].constant != 0 ? 0 : 0x07; // non-constant equates invalid
-                u32 const type = size_t(attrs[i].type.Value());
+                u32 const type = u32(attrs[i].type.Value());
                 attribute_types[0] |= u64((type >> 0) & 1) << i;
                 attribute_types[1] |= u64((type >> 1) & 1) << i;
                 attribute_types[2] |= u64((type >> 2) & 1) << i;

src/video_core/renderer_vulkan/fixed_pipeline_state.h

@@ -225,10 +225,10 @@ struct FixedPipelineState {
     u32 point_size;
 
     std::array<u16, Maxwell::NumViewports> viewport_swizzles;
-    union {
-        std::array<u32, 3> attribute_types; // Used with VK_EXT_vertex_input_dynamic_state
-        u64 enabled_divisors;
-    };
+
+    // TODO: this has to be trivially constructuible and both are mutually exclusive
+    std::array<u64, 3> attribute_types; // Used with VK_EXT_vertex_input_dynamic_state
+    u64 enabled_divisors;
 
     DynamicState dynamic_state;
     std::array<BlendingAttachment, Maxwell::NumRenderTargets> attachments;
@@ -277,9 +277,9 @@ struct FixedPipelineState {
     }
 
     u32 DynamicAttributeType(size_t i) const noexcept {
-        return (((attribute_types[0] >> i) & 1) << 0)
+        return u32((((attribute_types[0] >> i) & 1) << 0)
             | (((attribute_types[1] >> i) & 1) << 1)
-            | (((attribute_types[2] >> i) & 1) << 2);
+            | (((attribute_types[2] >> i) & 1) << 2));
     }
 };
 static_assert(std::has_unique_object_representations_v<FixedPipelineState>);