[AMDGPU] Add more test cases of D59608.

Summary: - Add more test cases.

Reviewers: arsenm

Subscribers: kzhuravl, jvesely, wdng, nhaehnle, yaxunl, dstuttard, tpr, t-tye, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D60071

llvm-svn: 357442