[Bug tree-optimization/82388] [8 Regression] wrong code at -O1 and above on x86_64-linux-gnu in 32-bit mode

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82388

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42281
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42281&action=edit
gcc8-pr82387.patch

Untested fix.