[Bug tree-optimization/81611] [8 Regression] gcc un-learned loop / post-increment optimization

[law at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81611

--- Comment #14 from Jeffrey A. Law <law at redhat dot com> ---
MEM_REF (as opposed to TARGET_MEM_REF) should be able to handle any simple
SSA_NAME + CONSTANT_OFFSET which are all we're really concerned with here.  THe
target's addressing modes don't really enter the picture (that's what
TARGET_MEM_REF is for).

I'd look for an issue in the types preventing forwprop from doing its job here.