Added jit_runtime class

Is a memory manager for ASMJIT, replaces asmjit::JitRuntime
Unified memory manager for ASMJIT and LLVM
Unified SPU trampoline generation
Remove previous workarounds

Utilities/JIT.h

@@ -7,10 +7,32 @@
 #include <array>
 #include <functional>
 
+// ASMJIT runtime for emitting code in a single 2G region
+struct jit_runtime final : asmjit::HostRuntime
+{
+	jit_runtime();
+	~jit_runtime() override;
+
+	// Allocate executable memory
+	asmjit::Error _add(void** dst, asmjit::CodeHolder* code) noexcept override;
+
+	// Do nothing (deallocation is delayed)
+	asmjit::Error _release(void* p) noexcept override;
+
+	// Allocate memory
+	static u8* alloc(std::size_t size, uint align, bool exec = true) noexcept;
+
+	// Should be called at least once after global initialization
+	static void initialize();
+
+	// Deallocate all memory
+	static void finalize() noexcept;
+};
+
 namespace asmjit
 {
 	// Should only be used to build global functions
-	JitRuntime& get_global_runtime();
+	::jit_runtime& get_global_runtime();
 
 	// Emit xbegin and adjacent loop, return label at xbegin
 	Label build_transaction_enter(X86Assembler& c, Label fallback);
@@ -130,9 +152,6 @@ public:
 	// Get compiled function address
 	u64 get(const std::string& name);
 
-	// Allocate writable executable memory (alignment is assumed 16)
-	static u8* alloc(u32 size);
-
 	// Get CPU info
 	static std::string cpu(const std::string& _cpu);