shader_recompiler: add SSA

src/graphics/shader/recompiler/frontend/translate/Attribute.cpp

@@ -0,0 +1,35 @@
+#include "graphics/shader/recompiler/frontend/translate/Translator.h"
+
+#include <algorithm>
+#include <array>
+
+namespace Libs::Graphics::ShaderRecompiler::Frontend::Detail {
+
+IR::ExportFlags Translator::AddExportInfo(const IR::Instruction& inst) {
+	const auto index = static_cast<uint32_t>(value_program.export_info.size());
+	value_program.export_info.push_back(inst.export_info);
+	return {.index = index, .pc = inst.pc};
+}
+
+bool Translator::TranslateAttributeOperation(const IR::Instruction& inst) {
+	if (inst.op == IR::Opcode::LoadInputF32) {
+		WriteOperand(inst.dst,
+		             ir.Emit(IR::ValueOpcode::GetAttribute,
+		                     {IR::Value(inst.input_info.attr), IR::Value(inst.input_info.chan)}));
+		return true;
+	}
+	if (inst.op == IR::Opcode::Export) {
+		std::array<IR::Value, 4> components {IR::Value(0u), IR::Value(0u), IR::Value(0u),
+		                                     IR::Value(0u)};
+		for (uint32_t index = 0; index < std::min(inst.src_count, 4u); index++) {
+			components[index] = ReadRawU32(PlainOperand(inst.src[index]));
+		}
+		const auto data = ir.Emit(IR::ValueOpcode::CompositeConstructU32x4,
+		                          {components[0], components[1], components[2], components[3]});
+		ir.Emit(IR::ValueOpcode::SetAttribute, {data, ir.GetExec()}, AddExportInfo(inst));
+		return true;
+	}
+	return false;
+}
+
+} // namespace Libs::Graphics::ShaderRecompiler::Frontend::Detail