Delete declared but not implemented functions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184087 91177308-0d34-0410-b5e6-96231b3b80d8
Disable vectorization for -Oz.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184089 91177308-0d34-0410-b5e6-96231b3b80d8
Don't use PathV1.h in llvm-link.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184092 91177308-0d34-0410-b5e6-96231b3b80d8