[Bug sanitizer/88333] [9 Regression] ice in asan_emit_stack_protection, at asan.c:1574

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88333

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Untested fix:
--- gcc/cfgexpand.c.jj  2018-11-30 19:59:59.676789914 +0100
+++ gcc/cfgexpand.c     2018-12-04 11:25:55.549672029 +0100
@@ -1124,6 +1124,11 @@ expand_stack_vars (bool (*pred) (size_t)
              && frame_offset.is_constant (&prev_offset)
              && stack_vars[i].size.is_constant ())
            {
+             if (data->asan_vec.is_empty ())
+               {
+                 alloc_stack_frame_space (0, ASAN_RED_ZONE_SIZE);
+                 prev_offset = frame_offset.to_constant ();
+               }
              prev_offset = align_base (prev_offset,
                                        MAX (alignb, ASAN_MIN_RED_ZONE_SIZE),
                                        !FRAME_GROWS_DOWNWARD);