[AMDGPU][MC][GFX9] Added instructions *saveexec*, *wrexec* and *bitreplicate*
See bug 36840: https://bugs.llvm.org/show_bug.cgi?id=36840
Differential Revision: https://reviews.llvm.org/D45250
Reviewers: artem.tamazov, arsenm, timcorringham
dpreobra | Apr 6 2018, 9:35 AM |