Fixing initialisation at declaration issues

integration_tests/CMakeLists.txt

@@ -131,6 +131,7 @@ RUN(NAME expr_02             LABELS cpython llvm c)
 RUN(NAME expr_03             LABELS cpython llvm c)
 RUN(NAME expr_04             LABELS cpython llvm c)
 RUN(NAME expr_05             LABELS cpython llvm)
+RUN(NAME expr_06             LABELS cpython llvm)
 RUN(NAME test_types_01       LABELS cpython llvm)
 RUN(NAME test_str_01         LABELS cpython llvm)
 RUN(NAME test_str_02         LABELS cpython llvm)

integration_tests/expr_06.py

@@ -0,0 +1,17 @@
+from ltypes import i32, f32
+from numpy import empty
+
+def main0():
+    x: i32 = 25
+    y: i32 = (2 + 3) * 5
+    z: f32 = (2.0 + 3) * 5.0
+    xa: i32[3] = empty(3)
+    assert x == 25
+    assert y == 25
+    assert z == 25.0
+
+main0()
+
+# Not implemented yet in LPython:
+#if __name__ == "__main__":
+#    main()

integration_tests/structs_03.py

@@ -10,12 +10,12 @@ def f(pa: Pointer[A]):
     print(pa.y)
 
 def g():
-    x: A
-    x = A(5, 5.5)
-    px: Pointer[A]
-    px = pointer(x)
-    px.x = 5
-    px.y = 5.5
-    f(px)
+    x: A = A(3, 3.25)
+    xp: Pointer[A] = pointer(x)
+    assert xp.x == 3
+    assert xp.y == 3.25
+    xp.x = 5
+    xp.y = 5.5
+    f(xp)
 
 g()

src/libasr/codegen/asr_to_c.cpp

@@ -145,11 +145,11 @@ class ASRToCVisitor : public BaseCCPPVisitor<ASRToCVisitor>
                     + "' not supported", {v.base.base.loc}, "");
                 throw Abort();
             }
-            if (v.m_symbolic_value) {
-                this->visit_expr(*v.m_symbolic_value);
-                std::string init = src;
-                sub += "=" + init;
-            }
+        }
+        if (v.m_symbolic_value) {
+            this->visit_expr(*v.m_symbolic_value);
+            std::string init = src;
+            sub += "=" + init;
         }
         return sub;
     }

src/libasr/codegen/asr_to_c_cpp.h

@@ -252,7 +252,7 @@ R"(#include <stdio.h>
         std::string sub;
         ASR::Variable_t *return_var = LFortran::ASRUtils::EXPR2VAR(x.m_return_var);
         if (ASRUtils::is_integer(*return_var->m_type)) {
-            int kind = ASR::down_cast<ASR::Integer_t>(return_var->m_type)->m_kind; 
+            int kind = ASR::down_cast<ASR::Integer_t>(return_var->m_type)->m_kind;
             switch (kind) {
                 case (1) : sub = "int8_t "; break;
                 case (2) : sub = "int16_t "; break;

src/libasr/codegen/asr_to_llvm.cpp

@@ -66,7 +66,7 @@
 #include <libasr/codegen/llvm_array_utils.h>
 
 // Uncomment for ASR printing below
-//#include <lfortran/pickle.h>
+// #include <lpython/pickle.h>
 
 #if LLVM_VERSION_MAJOR >= 11
 #    define FIXED_VECTOR_TYPE llvm::FixedVectorType
@@ -1712,6 +1712,7 @@ class ASRToLLVMVisitor : public ASR::BaseVisitor<ASRToLLVMVisitor>
                     if( v->m_symbolic_value != nullptr &&
                         !ASR::is_a<ASR::List_t>(*v->m_type)) {
                         target_var = ptr;
+                        tmp = nullptr;
                         this->visit_expr_wrapper(v->m_symbolic_value, true);
                         llvm::Value *init_value = tmp;
                         if (ASR::is_a<ASR::ArrayConstant_t>(*v->m_symbolic_value)) {

src/libasr/pass/class_constructor.cpp

@@ -21,13 +21,36 @@ class ClassConstructorVisitor : public PassUtils::PassVisitor<ClassConstructorVi
 
 public:
 
-    bool is_constructor_present;
+    bool is_constructor_present, is_init_constructor;
 
     ClassConstructorVisitor(Allocator &al) : PassVisitor(al, nullptr),
-    result_var(nullptr), is_constructor_present(false) {
+    result_var(nullptr), is_constructor_present(false),
+    is_init_constructor(false) {
         pass_result.reserve(al, 0);
     }
 
+    void visit_Subroutine(const ASR::Subroutine_t &x) {
+        // FIXME: this is a hack, we need to pass in a non-const `x`,
+        // which requires to generate a TransformVisitor.
+        ASR::Subroutine_t &xx = const_cast<ASR::Subroutine_t&>(x);
+        current_scope = xx.m_symtab;
+        for( auto item: current_scope->get_scope() ) {
+            if( ASR::is_a<ASR::Variable_t>(*item.second) ) {
+                ASR::Variable_t* variable = ASR::down_cast<ASR::Variable_t>(item.second);
+                if( variable->m_symbolic_value ) {
+                    result_var = ASRUtils::EXPR(ASR::make_Var_t(al, variable->base.base.loc,
+                                                                item.second));
+                    is_init_constructor = false;
+                    this->visit_expr(*variable->m_symbolic_value);
+                    if( is_init_constructor ) {
+                        variable->m_symbolic_value = nullptr;
+                    }
+                }
+            }
+        }
+        transform_stmts(xx.m_body, xx.n_body);
+    }
+
     void visit_Assignment(const ASR::Assignment_t& x) {
         if( x.m_value->type == ASR::exprType::DerivedTypeConstructor ) {
             is_constructor_present = true;
@@ -37,6 +60,7 @@ class ClassConstructorVisitor : public PassUtils::PassVisitor<ClassConstructorVi
     }
 
     void visit_DerivedTypeConstructor(const ASR::DerivedTypeConstructor_t &x) {
+        is_init_constructor = true;
         if( x.n_args == 0 ) {
             remove_original_stmt = true;
         }

src/libasr/pass/pass_utils.h

@@ -84,6 +84,13 @@ namespace LFortran {
                 void transform_stmts(ASR::stmt_t **&m_body, size_t &n_body) {
                     Vec<ASR::stmt_t*> body;
                     body.reserve(al, n_body);
+                    if (pass_result.size() > 0) {
+                        asr_changed = true;
+                        for (size_t j=0; j < pass_result.size(); j++) {
+                            body.push_back(al, pass_result[j]);
+                        }
+                        pass_result.n = 0;
+                    }
                     for (size_t i=0; i<n_body; i++) {
                         // Not necessary after we check it after each visit_stmt in every
                         // visitor method:

src/lpython/semantics/python_ast_to_asr.cpp

@@ -1319,8 +1319,11 @@ class CommonVisitor : public AST::BaseVisitor<Derived> {
 
         ASR::expr_t *value = nullptr;
         ASR::expr_t *init_expr = nullptr;
+        tmp = nullptr;
         if (x.m_value) {
             this->visit_expr(*x.m_value);
+        }
+        if (tmp) {
             value = ASRUtils::EXPR(tmp);
             value = cast_helper(type, value, true);
             if (!ASRUtils::check_equal_type(type, ASRUtils::expr_type(value))) {
@@ -1336,6 +1339,7 @@ class CommonVisitor : public AST::BaseVisitor<Derived> {
                 throw SemanticAbort();
             }
             init_expr = value;
+            value = ASRUtils::expr_value(value);
         }
         ASR::intentType s_intent = ASRUtils::intent_local;
         ASR::storage_typeType storage_type =
@@ -2899,8 +2903,9 @@ class BodyVisitor : public CommonVisitor<BodyVisitor> {
         if (ASRUtils::expr_value(left) != nullptr &&
             ASRUtils::expr_value(right) != nullptr) {
             if (ASRUtils::is_integer(*source_type)) {
+                ASR::expr_t* left_value_expr = ASRUtils::expr_value(left);
                 int64_t left_value = ASR::down_cast<ASR::IntegerConstant_t>(
-                                        ASRUtils::expr_value(left))
+                                        left_value_expr)
                                         ->m_n;
                 int64_t right_value = ASR::down_cast<ASR::IntegerConstant_t>(
                                         ASRUtils::expr_value(right))

tests/reference/asr-assign2-8d1a2ee.json

@@ -6,7 +6,7 @@
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-assign2-8d1a2ee.stdout",
-    "stdout_hash": "4aa03ce3bb76f9146f5e3e9da1df04ebf0f106625a2a468793f06419",
+    "stdout_hash": "b358f13ad062675500fda44dc9108ac54f4d4a6dde14422717b86567",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0

tests/reference/asr-assign2-8d1a2ee.stdout

@@ -1 +1 @@
-(TranslationUnit (SymbolTable 1 {f: (Variable 1 f Local (Cast (RealConstant   1.23456788999999989e+00 (Real 8 [])) RealToReal (Real 4 []) (RealConstant   1.23456788999999989e+00 (Real 4 []))) (Cast (RealConstant   1.23456788999999989e+00 (Real 8 [])) RealToReal (Real 4 []) (RealConstant   1.23456788999999989e+00 (Real 4 []))) Default (Real 4 []) Source Public Required .false.), f2: (Variable 1 f2 Local (RealConstant   1.23456789012340007e+00 (Real 8 [])) (RealConstant   1.23456789012340007e+00 (Real 8 [])) Default (Real 8 []) Source Public Required .false.), i: (Variable 1 i Local (IntegerConstant 5 (Integer 4 [])) (IntegerConstant 5 (Integer 4 [])) Default (Integer 4 []) Source Public Required .false.), i2: (Variable 1 i2 Local (Cast (IntegerConstant 53430903434 (Integer 4 [])) IntegerToInteger (Integer 8 []) ()) (Cast (IntegerConstant 53430903434 (Integer 4 [])) IntegerToInteger (Integer 8 []) ()) Default (Integer 8 []) Source Public Required .false.), main_program: (Program (SymbolTable 2 {}) main_program [] [])}) [])
+(TranslationUnit (SymbolTable 1 {f: (Variable 1 f Local (Cast (RealConstant   1.23456788999999989e+00 (Real 8 [])) RealToReal (Real 4 []) (RealConstant   1.23456788999999989e+00 (Real 4 []))) (RealConstant   1.23456788999999989e+00 (Real 4 [])) Default (Real 4 []) Source Public Required .false.), f2: (Variable 1 f2 Local (RealConstant   1.23456789012340007e+00 (Real 8 [])) (RealConstant   1.23456789012340007e+00 (Real 8 [])) Default (Real 8 []) Source Public Required .false.), i: (Variable 1 i Local (IntegerConstant 5 (Integer 4 [])) (IntegerConstant 5 (Integer 4 [])) Default (Integer 4 []) Source Public Required .false.), i2: (Variable 1 i2 Local (Cast (IntegerConstant 53430903434 (Integer 4 [])) IntegerToInteger (Integer 8 []) ()) () Default (Integer 8 []) Source Public Required .false.), main_program: (Program (SymbolTable 2 {}) main_program [] [])}) [])

tests/reference/asr-structs_03-0cef911.json

@@ -2,11 +2,11 @@
     "basename": "asr-structs_03-0cef911",
     "cmd": "lpython --show-asr --no-color {infile} -o {outfile}",
     "infile": "tests/../integration_tests/structs_03.py",
-    "infile_hash": "64975e5bcbb620c3ed53f38dd8322dcaa6a38577b288abc909639645",
+    "infile_hash": "745be61ec57b0a39c6f981dadeb4d8f2cf9d5aef9ca00ab856510795",
     "outfile": null,
     "outfile_hash": null,
     "stdout": "asr-structs_03-0cef911.stdout",
-    "stdout_hash": "edf92b0144446b9950ae26d366deb99a293358840a200b975739d0c7",
+    "stdout_hash": "1028ceedc469db4b7760b842a14fddab5bf06056b0e80709748e9b3c",
     "stderr": null,
     "stderr_hash": null,
     "returncode": 0

tests/reference/asr-structs_03-0cef911.stdout

@@ -1 +1 @@
-(TranslationUnit (SymbolTable 1 {A: (DerivedType (SymbolTable 2 {x: (Variable 2 x Local () () Default (Integer 4 []) Source Public Required .false.), y: (Variable 2 y Local () () Default (Real 4 []) Source Public Required .false.)}) A [x y] Source Public ()), _lpython_main_program: (Subroutine (SymbolTable 6 {}) _lpython_main_program [] [(SubroutineCall 1 g () [] ())] Source Public Implementation () .false. .false.), f: (Subroutine (SymbolTable 3 {pa: (Variable 3 pa In () () Default (Pointer (Derived 1 A [])) Source Public Required .false.)}) f [(Var 3 pa)] [(Print () [(DerivedRef (Var 3 pa) 2 x (Integer 4 []) ())]) (Print () [(DerivedRef (Var 3 pa) 2 y (Real 4 []) ())])] Source Public Implementation () .false. .false.), g: (Subroutine (SymbolTable 4 {px: (Variable 4 px Local () () Default (Pointer (Derived 1 A [])) Source Public Required .false.), x: (Variable 4 x Local () () Default (Derived 1 A []) Source Public Required .false.)}) g [] [(= (Var 4 x) (DerivedTypeConstructor 1 A [(IntegerConstant 5 (Integer 4 [])) (Cast (RealConstant   5.50000000000000000e+00 (Real 8 [])) RealToReal (Real 4 []) (RealConstant   5.50000000000000000e+00 (Real 4 [])))] (Derived 1 A []) ()) ()) (= (Var 4 px) (GetPointer (Var 4 x) (Pointer (Derived 1 A [])) ()) ()) (= (DerivedRef (Var 4 px) 2 x (Integer 4 []) ()) (IntegerConstant 5 (Integer 4 [])) ()) (= (DerivedRef (Var 4 px) 2 y (Real 4 []) ()) (Cast (RealConstant   5.50000000000000000e+00 (Real 8 [])) RealToReal (Real 4 []) (RealConstant   5.50000000000000000e+00 (Real 4 []))) ()) (SubroutineCall 1 f () [((Var 4 px))] ())] Source Public Implementation () .false. .false.), main_program: (Program (SymbolTable 5 {}) main_program [] [(SubroutineCall 1 _lpython_main_program () [] ())])}) [])
+(TranslationUnit (SymbolTable 1 {A: (DerivedType (SymbolTable 2 {x: (Variable 2 x Local () () Default (Integer 4 []) Source Public Required .false.), y: (Variable 2 y Local () () Default (Real 4 []) Source Public Required .false.)}) A [x y] Source Public ()), _lpython_main_program: (Subroutine (SymbolTable 6 {}) _lpython_main_program [] [(SubroutineCall 1 g () [] ())] Source Public Implementation () .false. .false.), f: (Subroutine (SymbolTable 3 {pa: (Variable 3 pa In () () Default (Pointer (Derived 1 A [])) Source Public Required .false.)}) f [(Var 3 pa)] [(Print () [(DerivedRef (Var 3 pa) 2 x (Integer 4 []) ())]) (Print () [(DerivedRef (Var 3 pa) 2 y (Real 4 []) ())])] Source Public Implementation () .false. .false.), g: (Subroutine (SymbolTable 4 {x: (Variable 4 x Local (DerivedTypeConstructor 1 A [(IntegerConstant 3 (Integer 4 [])) (Cast (RealConstant   3.25000000000000000e+00 (Real 8 [])) RealToReal (Real 4 []) (RealConstant   3.25000000000000000e+00 (Real 4 [])))] (Derived 1 A []) ()) () Default (Derived 1 A []) Source Public Required .false.), xp: (Variable 4 xp Local (GetPointer (Var 4 x) (Pointer (Derived 1 A [])) ()) () Default (Pointer (Derived 1 A [])) Source Public Required .false.)}) g [] [(Assert (Compare (DerivedRef (Var 4 xp) 2 x (Integer 4 []) ()) Eq (IntegerConstant 3 (Integer 4 [])) (Logical 4 []) () ()) ()) (Assert (Compare (Cast (DerivedRef (Var 4 xp) 2 y (Real 4 []) ()) RealToReal (Real 8 []) ()) Eq (RealConstant   3.25000000000000000e+00 (Real 8 [])) (Logical 4 []) () ()) ()) (= (DerivedRef (Var 4 xp) 2 x (Integer 4 []) ()) (IntegerConstant 5 (Integer 4 [])) ()) (= (DerivedRef (Var 4 xp) 2 y (Real 4 []) ()) (Cast (RealConstant   5.50000000000000000e+00 (Real 8 [])) RealToReal (Real 4 []) (RealConstant   5.50000000000000000e+00 (Real 4 []))) ()) (SubroutineCall 1 f () [((Var 4 xp))] ())] Source Public Implementation () .false. .false.), main_program: (Program (SymbolTable 5 {}) main_program [] [(SubroutineCall 1 _lpython_main_program () [] ())])}) [])