[Bug target/79671] [7 Regression] mapnik miscompilation on armv7hl since r235622

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79671

--- Comment #44 from Jason Merrill <jason at gcc dot gnu.org> ---
Created attachment 41048
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41048&action=edit
trial patch

Does this fix the issue?  I don't have an ARM setup handy for testing.