1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/cfgcleanup.c b/gcc/cfgcleanup.c
index 7f72e68..7173013 100644
--- a/gcc/cfgcleanup.c
+++ b/gcc/cfgcleanup.c
@@ -1078,6 +1078,16 @@ old_insns_match_p (int mode ATTRIBUTE_UNUSED, rtx i1, rtx i2)
   if (NOTE_INSN_BASIC_BLOCK_P (i1) && NOTE_INSN_BASIC_BLOCK_P (i2))
     return dir_both;
 
+  /* ??? 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)
+    p1 = XEXP (p1, 0);
+  if (p2)
+    p2 = XEXP (p2, 0);
+  if (!rtx_equal_p (p1, p2))
+    return dir_none;
+
   p1 = PATTERN (i1);
   p2 = PATTERN (i2);