[AMDGPU] Split dot-insts feature

Differential Revision: https://reviews.llvm.org/D57972

llvm-svn: 353588
diff --git a/clang/lib/Basic/Targets/AMDGPU.cpp b/clang/lib/Basic/Targets/AMDGPU.cpp
index b04d894..7120f6a 100644
--- a/clang/lib/Basic/Targets/AMDGPU.cpp
+++ b/clang/lib/Basic/Targets/AMDGPU.cpp
@@ -136,7 +136,8 @@
     switch (llvm::AMDGPU::parseArchAMDGCN(CPU)) {
     case GK_GFX906:
       Features["dl-insts"] = true;
-      Features["dot-insts"] = true;
+      Features["dot1-insts"] = true;
+      Features["dot2-insts"] = true;
       LLVM_FALLTHROUGH;
     case GK_GFX909:
     case GK_GFX904: