Do not crash on alignof($TYPE).

[cparser] / ast2firm.c

diff --git a/ast2firm.c b/ast2firm.c
index 7922661..c3b606c 100644 (file)
--- a/ast2firm.c
+++ b/ast2firm.c
@@ -2741,37 +2741,38 @@ static entity_t *get_expression_entity(const expression_t *expression)
  */
 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
 {
-       ir_type *irtype;
+       ir_entity *irentity = NULL;
 
        const expression_t *tp_expression = expression->tp_expression;
-       entity_t           *entity        = get_expression_entity(tp_expression);
-       ir_entity          *irentity      = NULL;
-
-       if (entity != NULL && is_declaration(entity)) {
-               switch (entity->declaration.kind) {
-               case DECLARATION_KIND_UNKNOWN:
-                       panic("unknown entity reference found");
-               case DECLARATION_KIND_COMPOUND_MEMBER:
-                       irentity = entity->compound_member.entity;
-                       break;
-               case DECLARATION_KIND_GLOBAL_VARIABLE:
-               case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
-                       irentity = entity->variable.v.entity;
-                       break;
-               case DECLARATION_KIND_PARAMETER_ENTITY:
-                       irentity = entity->parameter.v.entity;
-                       break;
-               case DECLARATION_KIND_FUNCTION:
-               case DECLARATION_KIND_INNER_FUNCTION:
-                       irentity = entity->function.entity;
-                       break;
-               case DECLARATION_KIND_PARAMETER:
-               case DECLARATION_KIND_LOCAL_VARIABLE:
-               case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
-                       break;
+       if (tp_expression != NULL) {
+               entity_t *entity = get_expression_entity(tp_expression);
+               if (entity != NULL && is_declaration(entity)) {
+                       switch (entity->declaration.kind) {
+                       case DECLARATION_KIND_UNKNOWN:
+                               panic("unknown entity reference found");
+                       case DECLARATION_KIND_COMPOUND_MEMBER:
+                               irentity = entity->compound_member.entity;
+                               break;
+                       case DECLARATION_KIND_GLOBAL_VARIABLE:
+                       case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
+                               irentity = entity->variable.v.entity;
+                               break;
+                       case DECLARATION_KIND_PARAMETER_ENTITY:
+                               irentity = entity->parameter.v.entity;
+                               break;
+                       case DECLARATION_KIND_FUNCTION:
+                       case DECLARATION_KIND_INNER_FUNCTION:
+                               irentity = entity->function.entity;
+                               break;
+                       case DECLARATION_KIND_PARAMETER:
+                       case DECLARATION_KIND_LOCAL_VARIABLE:
+                       case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
+                               break;
+                       }
                }
        }
 
+       ir_type *irtype;
        if (irentity != NULL) {
                irtype = get_entity_type(irentity);
        } else {