Implement jit_compiler::check

Instead of checking file existence (because file may be damaged).

Utilities/JIT.cpp

@@ -1200,6 +1200,19 @@ void jit_compiler::add(const std::string& path)
 	}
 }
 
+bool jit_compiler::check(const std::string& path)
+{
+	if (auto cache = ObjectCache::load(path))
+	{
+		if (auto object_file = llvm::object::ObjectFile::createObjectFile(*cache))
+		{
+			return true;
+		}
+	}
+
+	return false;
+}
+
 void jit_compiler::fin()
 {
 	m_engine->finalizeObject();

Utilities/JIT.h

@@ -171,6 +171,9 @@ public:
 	// Add object (path to obj file)
 	void add(const std::string& path);
 
+	// Check object file
+	static bool check(const std::string& path);
+
 	// Finalize
 	void fin();
 

rpcs3/Emu/Cell/PPUThread.cpp

@@ -1650,7 +1650,7 @@ extern void ppu_initialize(const ppu_module& info)
 		link_workload.emplace_back(obj_name, false);
 
 		// Check object file
-		if (fs::is_file(cache_path + obj_name + ".gz") || fs::is_file(cache_path + obj_name))
+		if (jit_compiler::check(cache_path + obj_name))
 		{
 			if (!jit)
 			{