On behalf of Alexandros Lamprineas:

LLVM targeting aarch64 doesn't correctly produce aligned accesses for non-aligned
data at -O0/fast-isel (-mno-unaligned-access).
The root cause seems to be in fast-isel not producing unaligned access correctly
for -mno-unaligned-access.

The patch just aborts fast-isel for loads and stores when -mno-unaligned-access is
present. 
The regression test is updated to check this new test case (-mno-unaligned-access 
together with fast-isel).

Differential Revision: http://reviews.llvm.org/D10360

llvm-svn: 239732