[Bug tree-optimization/78148] [7 Regression] r241649 causes -fcompare-debug failure on ppc64le

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78148

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 39921
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39921&action=edit
gcc7-pr78148.patch

Untested fix.  Hopefully it will also fix the ada bootstrap failure on
x86_64-linux.