[DA] Fix direction vectors for weakZeroSrcSIV

Both weakZeroSrcSIV and weakZeroDstSIV are currently giving the same
direction vectors. Fix weakZeroSrcSIVtest by flipping the directions
it gives.

Differential Revision: https://reviews.llvm.org/D46678



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@333658 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed