[Bug tree-optimization/84956] ICE in replace_block_by, at tree-ssa-tail-merge.c:1546

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84956

--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 43722
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43722&action=edit
Tentative patch