[Bug tree-optimization/117895] [15 regression] ICE in operand_subword_force since r15-5850-g4d2b9202fe94c5

[law at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117895

--- Comment #4 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Looks like another mode problem, probably more than one left in this code. 
While I've got a change that fixes this particular failure, I'll need to do
some wider testing.