fix array symbol duplication in interactive mode (#2734)

* fix array symbol duplication in interactive mode

* add test

* update according to code review

src/libasr/codegen/asr_to_llvm.cpp

@@ -2776,9 +2776,11 @@ class ASRToLLVMVisitor : public ASR::BaseVisitor<ASRToLLVMVisitor>
  llvm::StructType* array_type = static_cast<llvm::StructType*>(
  llvm_utils->get_type_from_ttype_t_util(x.m_type, module.get()));
  llvm::Constant *ptr = module->getOrInsertGlobal(x.m_name, array_type);
- module->getNamedGlobal(x.m_name)->setInitializer(
- llvm::ConstantStruct::get(array_type,
- llvm::Constant::getNullValue(array_type)));
+ if (!external) {
+ module->getNamedGlobal(x.m_name)->setInitializer(
+ llvm::ConstantStruct::get(array_type,
+ llvm::Constant::getNullValue(array_type)));
+ }
  llvm_symtab[h] = ptr;
  } else if (x.m_type->type == ASR::ttypeType::Logical) {
  llvm::Constant *ptr = module->getOrInsertGlobal(x.m_name,

src/lpython/tests/test_llvm.cpp

@@ -1450,6 +1450,23 @@ def my_concat(x: str, y: str) -> str:
  CHECK(std::strcmp(r.result.str, "Python REPL") == 0);
 }
 
+TEST_CASE("PythonCompiler Array 1") {
+ CompilerOptions cu;
+ cu.po.disable_main = true;
+ cu.emit_debug_line_column = false;
+ cu.generate_object_code = false;
+ cu.interactive = true;
+ cu.po.runtime_library_dir = LCompilers::LPython::get_runtime_library_dir();
+ PythonCompiler e(cu);
+ LCompilers::Result<PythonCompiler::EvalResult>
+ r = e.evaluate2("i: i32[10] = empty(10, dtype=int32)");
+ CHECK(r.ok);
+ CHECK(r.result.type == PythonCompiler::EvalResult::statement);
+ r = e.evaluate2("print(i)");
+ CHECK(r.ok);
+ CHECK(r.result.type == PythonCompiler::EvalResult::statement);
+}
+
 TEST_CASE("PythonCompiler asr verify 1") {
  CompilerOptions cu;
  cu.po.disable_main = true;