Add z9 and z10 target processors. Mark z10-only instructions as such.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75977 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/SystemZ/SystemZSubtarget.cpp b/lib/Target/SystemZ/SystemZSubtarget.cpp
index e5b2a1e..9c3262e 100644
--- a/lib/Target/SystemZ/SystemZSubtarget.cpp
+++ b/lib/Target/SystemZ/SystemZSubtarget.cpp
@@ -19,8 +19,9 @@
 using namespace llvm;
 
 SystemZSubtarget::SystemZSubtarget(const TargetMachine &TM, const Module &M,
-                                 const std::string &FS) {
-  std::string CPU = "generic";
+                                   const std::string &FS):
+  HasZ10Insts(false) {
+  std::string CPU = "z9";
 
   // Parse features string.
   ParseSubtargetFeatures(FS, CPU);