[Bug target/80706] [7/8 Regression] peephole2 uses uninitialized stack variables on i686

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80706

--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 41340
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41340&action=edit
gcc8-pr80706.patch

I came up with this (in addition to #c7).  This removes one of the two useless
stores in the original pr71245-1.c testcase and restores the above pr71245-1.c
modification to what it used to look before (well, even better, as it reserves
smaller stack).