SPU LLVM: fix SPU termination (spu_escape) on Windows

Adjust restored stack pointer for the lack of tail call.

rpcs3/Emu/Cell/SPURecompiler.cpp

@@ -4123,7 +4123,11 @@ class spu_llvm_recompiler : public spu_recompiler_base, public cpu_translator
 		gateway->setLinkage(GlobalValue::InternalLinkage);
 		gateway->setCallingConv(CallingConv::GHC);
 
-		m_ir->CreateCall(gateway, {m_thread, m_lsptr, m_base_pc})->setCallingConv(gateway->getCallingConv());
+		const auto gway_ci = m_ir->CreateCall(gateway, {m_thread, m_lsptr, m_base_pc});
+		gway_ci->setCallingConv(gateway->getCallingConv());
+#ifndef _WIN32
+		gway_ci->setTailCall();
+#endif
 		m_ir->CreateRetVoid();
 		m_ir->SetInsertPoint(label_stop);
 		m_ir->CreateRetVoid();
@@ -4158,7 +4162,12 @@ class spu_llvm_recompiler : public spu_recompiler_base, public cpu_translator
 		escape->setLinkage(GlobalValue::InternalLinkage);
 		m_ir->SetInsertPoint(BasicBlock::Create(m_context, "", escape));
 		const auto load_sp = m_ir->CreateLoad(_ptr<u64>(&*escape->arg_begin(), ::offset32(&spu_thread::saved_native_sp)));
-		m_ir->CreateCall(get_intrinsic<u64>(Intrinsic::write_register), {rsp_name, load_sp});
+#ifdef _WIN32
+		const auto rest_sp = m_ir->CreateSub(load_sp, m_ir->getInt64(8));
+#else
+		const auto rest_sp = load_sp;
+#endif
+		m_ir->CreateCall(get_intrinsic<u64>(Intrinsic::write_register), {rsp_name, rest_sp});
 		m_ir->CreateRetVoid();
 
 		// Function that executes check_state and escapes if necessary