[CVP] setDeducedOverflowingFlags(): actually inc per-opcode stats

This is really embarrassing. Those are pointers, so that offsets the
pointers, not the statistics pointed-by the pointer...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@375290 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed