AMDGPU: Add gfx900 and gfx901 processors

llvm-svn: 295556
diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index 647b14e..d69a0ff 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -2034,7 +2034,8 @@
     GK_CAYMAN,
     GK_GFX6,
     GK_GFX7,
-    GK_GFX8
+    GK_GFX8,
+    GK_GFX9
   } GPU;
 
   bool hasFP64:1;
@@ -2211,6 +2212,8 @@
       .Case("gfx803",    GK_GFX8)
       .Case("gfx804",    GK_GFX8)
       .Case("gfx810",    GK_GFX8)
+      .Case("gfx900",    GK_GFX9)
+      .Case("gfx901",    GK_GFX9)
       .Default(GK_NONE);
   }