[Bug target/59003] [4.9 Regression] profiledbootstrap miscompiles gcc during stagefeedback --with-tune=amdfam10

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59003

--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I believe the bug is in expand_small_movmem_or_setmem, if
GET_MODE_SIZE (mode) < size, then we do size / GET_MODE_SIZE (mode) first
stores
starting at destmem's address (correct), but then do just a single store
starting at destmem's address + count - GET_MODE_SIZE (mode), which is not
correct.  We should have done again size / GET_MODE_SIZE (mode) stores starting
at destmem's address + count - size.