Revert^2 "Implement Dot Product Vectorization for x86"

This reverts commit b8c884e5f22390386b202459ab55ef3046631e42.

And fixes a codegen bug (the reason why the original CL was
reverted).

Test: 684-checker-simd-dotprod
Test: DEX2OAT_HOST_INSTRUCTION_SET_FEATURES="sse4.1" test.py --host
Test: test.py --host --jit --gcstress
Change-Id: Ibef925d1037abc9cb5f3d4dbd79f1d1eceae2f71
Signed-off-by: Shalini Salomi Bodapati <shalini.salomi.bodapati@intel.com>
11 files changed