[Bug tree-optimization/68671] [5/6 Regression] gcc.dg/torture/pr66952.c FAILs with -fno-tree-dce

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68671

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 36901
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36901&action=edit
gcc6-pr68671.patch

Untested fix.