feature: added logical operators

src/llvm/expr.c

@@ -15,7 +15,7 @@ BackendError impl_bitwise_operation(LLVMBackendCompileUnit* unit,
     LLVMValueRef lhs = NULL;
     LLVMValueRef op = NULL;
 
-    if (operation->kind == BitwiseNot) {
+    if (operation->impl.bitwise == BitwiseNot) {
         // single operand
     } else {
         // two operands
@@ -39,6 +39,24 @@ BackendError impl_bitwise_operation(LLVMBackendCompileUnit* unit,
     return SUCCESS;
 }
 
+/**
+ * @brief Convert any integral type (integer) to a boolean value.
+ *        A boolean value hereby meaning an integer of the same type as the input
+ *        value but with the value of either 0 or one.
+ * @param builder
+ * @param integral
+ * @return
+ */
+static LLVMValueRef convert_integral_to_boolean(
+        LLVMBuilderRef builder, LLVMValueRef integral) {
+    // type of input
+    LLVMTypeRef valueType = LLVMTypeOf(integral);
+    // zero value of same type as integral
+    LLVMValueRef zero = LLVMConstIntOfString(valueType, "0", 10);
+    // returns 1 if integral is not zero and zero otherwise
+    return LLVMBuildICmp(builder, LLVMIntNE, zero, integral, "to boolean");
+}
+
 BackendError impl_logical_operation(LLVMBackendCompileUnit *unit,
                                     LLVMLocalScope *scope,
                                     LLVMBuilderRef builder,
@@ -51,8 +69,11 @@ BackendError impl_logical_operation(LLVMBackendCompileUnit* unit,
 
     if (operation->kind == BitwiseNot) {
         // single operand
+        op = convert_integral_to_boolean(builder, op);
     } else {
         // two operands
+        lhs = convert_integral_to_boolean(builder, lhs);
+        rhs = convert_integral_to_boolean(builder, rhs);
     }
 
     switch (operation->impl.bitwise) {
@@ -139,6 +160,7 @@ BackendError impl_typecast(LLVMBackendCompileUnit* unit, LLVMLocalScope* scope,
 
     return err;
 }
+
 BackendError impl_expr(LLVMBackendCompileUnit *unit, LLVMLocalScope *scope,
                        LLVMBuilderRef builder, Expression *expr,
                        LLVMValueRef *llvm_result) {

src/llvm/parser.c

@@ -210,25 +210,6 @@ LLVMGlobalScope* new_global_scope() {
     return scope;
 }
 
-LLVMLocalScope* new_local_scope(LLVMGlobalScope* global_scope,
-                                LLVMLocalScope* parent_scope) {
-    DEBUG("creating local scope...");
-    LLVMLocalScope* scope = malloc(sizeof(LLVMLocalScope));
-
-    scope->variables = g_hash_table_new(g_str_hash, g_str_equal);
-    scope->params = g_hash_table_new(g_str_hash, g_str_equal);
-    scope->global_scope = global_scope;
-    scope->parent_scope = parent_scope;
-
-    return scope;
-}
-
-void delete_local_scope(LLVMLocalScope* scope) {
-    DEBUG("deleting global scope...");
-    g_hash_table_unref(scope->variables);
-    free(scope);
-}
-
 void delete_global_scope(LLVMGlobalScope* scope) {
     DEBUG("deleting global scope...");
     g_hash_table_unref(scope->functions);