vla: Fix check for vla used by autoconf

1) recursive types have no storage anymore, so a
     static int (*p)[x];
   declaration is just fine
2) since somewhen VT_VLA doesn't imply VT_ARRAY anymore, so we
   now need to check VLA in at least one place before checking
   test_lvalue.

((2) should probably be cleaned up again so that VLA does again imply
ARRAY)

tccgen.c

@@ -5018,7 +5018,8 @@ static CType *type_decl(CType *type, AttributeDef *ad, int *v, int td)
 	  expect("identifier");
 	*v = 0;
     }
-    post_type(post, ad, storage, td & ~(TYPE_DIRECT|TYPE_ABSTRACT));
+    post_type(post, ad, post != ret ? 0 : storage,
+              td & ~(TYPE_DIRECT|TYPE_ABSTRACT));
     parse_attribute(ad);
     type->t |= storage;
     return ret;
@@ -5437,7 +5438,7 @@ ST_FUNC void unary(void)
            there and in function calls. */
         /* arrays can also be used although they are not lvalues */
         if ((vtop->type.t & VT_BTYPE) != VT_FUNC &&
-            !(vtop->type.t & VT_ARRAY))
+            !(vtop->type.t & (VT_ARRAY | VT_VLA)))
             test_lvalue();
         if (vtop->sym)
           vtop->sym->a.addrtaken = 1;

tests/tcctest.c

@@ -2979,6 +2979,7 @@ void c99_vla_test_2(int d, int h, int w)
     int x, y, z;
     int (*arr)[h][w] = malloc(sizeof(int) * d*h*w);
     int c = 1;
+    static int (*starr)[h][w];
 
     printf("Test C99 VLA 6 (pointer)\n");
 
@@ -2998,13 +2999,15 @@ void c99_vla_test_2(int d, int h, int w)
         }
         puts("");
     }
+    starr = &arr[1];
     printf(" sizes : %d %d %d\n"
            " pdiff : %d %d\n"
-           " tests : %d %d\n",
+           " tests : %d %d %d\n",
         sizeof (*arr), sizeof (*arr)[0], sizeof (*arr)[0][0],
         arr + 2 - arr, *arr + 3 - *arr,
         0 == sizeof (*arr + 1) - sizeof arr,
-        0 == sizeof sizeof *arr - sizeof arr
+        0 == sizeof sizeof *arr - sizeof arr,
+        starr[0][2][3] == arr[1][2][3]
         );
     free (arr);
 }