[Bug debug/60438] [4.9 Regression] dwarf2cfi :2239 still assert,not the same cause as PR 59575

[manjian2006 at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60438

--- Comment #16 from linzj <manjian2006 at gmail dot com> ---
I have dodged this bug by the following patch:
diff --git a/gcc/cfgcleanup.c b/gcc/cfgcleanup.c
index 77196ee..d7c2b1e 100644
--- a/gcc/cfgcleanup.c
+++ b/gcc/cfgcleanup.c
@@ -1106,20 +1106,7 @@ old_insns_match_p (int mode ATTRIBUTE_UNUSED, rtx i1,
rtx i2)
   /* ??? Do not allow cross-jumping between different stack levels.  */
   p1 = find_reg_note (i1, REG_ARGS_SIZE, NULL);
   p2 = find_reg_note (i2, REG_ARGS_SIZE, NULL);
-  if (p1 && p2)
-    {
-      p1 = XEXP (p1, 0);
-      p2 = XEXP (p2, 0);
-      if (!rtx_equal_p (p1, p2))
-        return dir_none;
-
-      /* ??? Worse, this adjustment had better be constant lest we
-         have differing incoming stack levels.  */
-      if (!frame_pointer_needed
-          && find_args_size_adjust (i1) == HOST_WIDE_INT_MIN)
-    return dir_none;
-    }
-  else if (p1 || p2)
+  if (p1 || p2)
     return dir_none;

   p1 = PATTERN (i1);


I don't expect this patch used formally though.It's just a dodge.