[Bug ada/68590] [6 Regression] FAIL: gnat.dg/loop_optimization19.adb scan-tree-dump-not optimized "Index_Check"

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68590

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
So I'd say we should do

Index: gcc/tree.c
===================================================================
--- gcc/tree.c  (revision 231058)
+++ gcc/tree.c  (working copy)
@@ -3344,10 +3344,6 @@
   t = build1 (SAVE_EXPR, TREE_TYPE (expr), t);
   SET_EXPR_LOCATION (t, EXPR_LOCATION (expr));

-  /* This expression might be placed ahead of a jump to ensure that the
-     value was computed on both sides of the jump.  So make sure it isn't
-     eliminated as dead.  */
-  TREE_SIDE_EFFECTS (t) = 1;
   return t;
 }