shader: Initial recompiler work

src/shader_recompiler/frontend/ir/basic_block.cpp

@@ -0,0 +1,142 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <algorithm>
+#include <initializer_list>
+#include <map>
+#include <memory>
+
+#include "common/bit_cast.h"
+#include "common/common_types.h"
+#include "shader_recompiler/frontend/ir/basic_block.h"
+#include "shader_recompiler/frontend/ir/value.h"
+
+namespace Shader::IR {
+
+Block::Block(u32 begin, u32 end) : location_begin{begin}, location_end{end} {}
+
+Block::~Block() = default;
+
+void Block::AppendNewInst(Opcode op, std::initializer_list<Value> args) {
+    PrependNewInst(end(), op, args);
+}
+
+Block::iterator Block::PrependNewInst(iterator insertion_point, Opcode op,
+                                      std::initializer_list<Value> args) {
+    Inst* const inst{std::construct_at(instruction_alloc_pool.allocate(), op)};
+    const auto result_it{instructions.insert(insertion_point, *inst)};
+
+    if (inst->NumArgs() != args.size()) {
+        throw InvalidArgument("Invalid number of arguments {} in {}", args.size(), op);
+    }
+    std::ranges::for_each(args, [inst, index = size_t{0}](const Value& arg) mutable {
+        inst->SetArg(index, arg);
+        ++index;
+    });
+    return result_it;
+}
+
+u32 Block::LocationBegin() const noexcept {
+    return location_begin;
+}
+
+u32 Block::LocationEnd() const noexcept {
+    return location_end;
+}
+
+Block::InstructionList& Block::Instructions() noexcept {
+    return instructions;
+}
+
+const Block::InstructionList& Block::Instructions() const noexcept {
+    return instructions;
+}
+
+static std::string ArgToIndex(const std::map<const Block*, size_t>& block_to_index,
+                              const std::map<const Inst*, size_t>& inst_to_index,
+                              const Value& arg) {
+    if (arg.IsEmpty()) {
+        return "<null>";
+    }
+    if (arg.IsLabel()) {
+        if (const auto it{block_to_index.find(arg.Label())}; it != block_to_index.end()) {
+            return fmt::format("{{Block ${}}}", it->second);
+        }
+        return fmt::format("$<unknown block {:016x}>", reinterpret_cast<u64>(arg.Label()));
+    }
+    if (!arg.IsImmediate()) {
+        if (const auto it{inst_to_index.find(arg.Inst())}; it != inst_to_index.end()) {
+            return fmt::format("%{}", it->second);
+        }
+        return fmt::format("%<unknown inst {:016x}>", reinterpret_cast<u64>(arg.Inst()));
+    }
+    switch (arg.Type()) {
+    case Type::U1:
+        return fmt::format("#{}", arg.U1() ? '1' : '0');
+    case Type::U8:
+        return fmt::format("#{}", arg.U8());
+    case Type::U16:
+        return fmt::format("#{}", arg.U16());
+    case Type::U32:
+        return fmt::format("#{}", arg.U32());
+    case Type::U64:
+        return fmt::format("#{}", arg.U64());
+    case Type::Reg:
+        return fmt::format("{}", arg.Reg());
+    case Type::Pred:
+        return fmt::format("{}", arg.Pred());
+    case Type::Attribute:
+        return fmt::format("{}", arg.Attribute());
+    default:
+        return "<unknown immediate type>";
+    }
+}
+
+std::string DumpBlock(const Block& block) {
+    size_t inst_index{0};
+    std::map<const Inst*, size_t> inst_to_index;
+    return DumpBlock(block, {}, inst_to_index, inst_index);
+}
+
+std::string DumpBlock(const Block& block, const std::map<const Block*, size_t>& block_to_index,
+                      std::map<const Inst*, size_t>& inst_to_index, size_t& inst_index) {
+    std::string ret{"Block"};
+    if (const auto it{block_to_index.find(&block)}; it != block_to_index.end()) {
+        ret += fmt::format(" ${}", it->second);
+    }
+    ret += fmt::format(": begin={:04x} end={:04x}\n", block.LocationBegin(), block.LocationEnd());
+
+    for (const Inst& inst : block) {
+        const Opcode op{inst.Opcode()};
+        ret += fmt::format("[{:016x}] ", reinterpret_cast<u64>(&inst));
+        if (TypeOf(op) != Type::Void) {
+            ret += fmt::format("%{:<5} = {}", inst_index, op);
+        } else {
+            ret += fmt::format("         {}", op); // '%00000 = ' -> 1 + 5 + 3 = 9 spaces
+        }
+        const size_t arg_count{NumArgsOf(op)};
+        for (size_t arg_index = 0; arg_index < arg_count; ++arg_index) {
+            const Value arg{inst.Arg(arg_index)};
+            ret += arg_index != 0 ? ", " : " ";
+            ret += ArgToIndex(block_to_index, inst_to_index, arg);
+
+            const Type actual_type{arg.Type()};
+            const Type expected_type{ArgTypeOf(op, arg_index)};
+            if (!AreTypesCompatible(actual_type, expected_type)) {
+                ret += fmt::format("<type error: {} != {}>", actual_type, expected_type);
+            }
+        }
+        if (TypeOf(op) != Type::Void) {
+            ret += fmt::format(" (uses: {})\n", inst.UseCount());
+        } else {
+            ret += '\n';
+        }
+
+        inst_to_index.emplace(&inst, inst_index);
+        ++inst_index;
+    }
+    return ret;
+}
+
+} // namespace Shader::IR