AMDGPU: Use SOPK compare instructions

llvm-svn: 281780
diff --git a/llvm/lib/Target/AMDGPU/SIDefines.h b/llvm/lib/Target/AMDGPU/SIDefines.h
index 5c29f82..643b872 100644
--- a/llvm/lib/Target/AMDGPU/SIDefines.h
+++ b/llvm/lib/Target/AMDGPU/SIDefines.h
@@ -43,7 +43,8 @@
   SGPRSpill = 1 << 24,
   VOPAsmPrefer32Bit = 1 << 25,
   Gather4 = 1 << 26,
-  DisableWQM = 1 << 27
+  DisableWQM = 1 << 27,
+  SOPK_ZEXT = 1 << 28
 };
 }