diff options
| -rw-r--r-- | compile.c | 8 |
1 files changed, 8 insertions, 0 deletions
@@ -268,6 +268,8 @@ CORD compile_statement(env_t *env, ast_t *ast) if (!assign->targets->next && assign->targets->ast->tag == Var) { // Common case: assigning to one variable: type_t *t = get_type(env, assign->targets->ast); + if (t->tag == PointerType && Match(t, PointerType)->is_stack) + code_err(test->expr, "Stack references cannot be assigned to local variables because the variable may outlive the stack memory."); return CORD_asprintf( "test(({ %r; &%r; }), %r, %r, %r, %ld, %ld);", compile_assignment(env, assign->targets->ast, compile(with_enum_scope(env, t), assign->values->ast)), @@ -286,6 +288,8 @@ CORD compile_statement(env_t *env, ast_t *ast) int64_t i = 1; for (ast_list_t *target = assign->targets, *value = assign->values; target && value; target = target->next, value = value->next) { type_t *target_type = get_type(env, target->ast); + if (target_type->tag == PointerType && Match(target_type, PointerType)->is_stack) + code_err(ast, "Stack references cannot be assigned to local variables because the variable may outlive the stack memory."); env_t *val_scope = with_enum_scope(env, target_type); type_t *value_type = get_type(val_scope, value->ast); CORD val_code = compile(val_scope, value->ast); @@ -340,6 +344,8 @@ CORD compile_statement(env_t *env, ast_t *ast) // Single assignment, no temp vars needed: if (assign->targets && !assign->targets->next) { type_t *lhs_t = get_type(env, assign->targets->ast); + if (lhs_t->tag == PointerType && Match(lhs_t, PointerType)->is_stack) + code_err(ast, "Stack references cannot be assigned to local variables because the variable may outlive the stack memory."); env_t *val_env = with_enum_scope(env, lhs_t); type_t *rhs_t = get_type(val_env, assign->values->ast); CORD val = compile(val_env, assign->values->ast); @@ -352,6 +358,8 @@ CORD compile_statement(env_t *env, ast_t *ast) int64_t i = 1; for (ast_list_t *value = assign->values, *target = assign->targets; value && target; value = value->next, target = target->next) { type_t *lhs_t = get_type(env, target->ast); + if (lhs_t->tag == PointerType && Match(lhs_t, PointerType)->is_stack) + code_err(ast, "Stack references cannot be assigned to local variables because the variable may outlive the stack memory."); env_t *val_env = with_enum_scope(env, lhs_t); type_t *rhs_t = get_type(val_env, value->ast); CORD val = compile(val_env, value->ast); |