[AMDGPU] Separate feature dot-insts

Differential Revision: https://reviews.llvm.org/D56525

llvm-svn: 350794
diff --git a/clang/lib/Basic/Targets/AMDGPU.cpp b/clang/lib/Basic/Targets/AMDGPU.cpp
index 4f17b17f..7313a69 100644
--- a/clang/lib/Basic/Targets/AMDGPU.cpp
+++ b/clang/lib/Basic/Targets/AMDGPU.cpp
@@ -137,6 +137,7 @@
     switch (llvm::AMDGPU::parseArchAMDGCN(CPU)) {
     case GK_GFX906:
       Features["dl-insts"] = true;
+      Features["dot-insts"] = true;
       LLVM_FALLTHROUGH;
     case GK_GFX909:
     case GK_GFX904: