AMDGPU: Split AMDGPUTTI into GCNTTI and R600TTI

Reviewers: arsenm, nhaehnle

Reviewed By: arsenm

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

Differential Revision: https://reviews.llvm.org/D47359

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@333605 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed