[SystemZ] Add FI[EDX]BRA

These are extensions of the existing FI[EDX]BR instructions, but use a spare
bit to suppress inexact conditions.

llvm-svn: 188894
diff --git a/llvm/lib/Target/SystemZ/SystemZSubtarget.cpp b/llvm/lib/Target/SystemZ/SystemZSubtarget.cpp
index 036ec05..b6a63923 100644
--- a/llvm/lib/Target/SystemZ/SystemZSubtarget.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZSubtarget.cpp
@@ -21,7 +21,8 @@
                                    const std::string &CPU,
                                    const std::string &FS)
   : SystemZGenSubtargetInfo(TT, CPU, FS), HasDistinctOps(false),
-    HasLoadStoreOnCond(false), HasHighWord(false), TargetTriple(TT) {
+    HasLoadStoreOnCond(false), HasHighWord(false), HasFPExtension(false),
+    TargetTriple(TT) {
   std::string CPUName = CPU;
   if (CPUName.empty())
     CPUName = "z10";