[ARM64] Set default CPU to generic instead of cyclone.

llvm-svn: 206313
diff --git a/llvm/lib/Target/ARM64/ARM64Subtarget.cpp b/llvm/lib/Target/ARM64/ARM64Subtarget.cpp
index 30c1264..3312e8e 100644
--- a/llvm/lib/Target/ARM64/ARM64Subtarget.cpp
+++ b/llvm/lib/Target/ARM64/ARM64Subtarget.cpp
@@ -32,10 +32,8 @@
       CPUString(CPU), TargetTriple(TT) {
   // Determine default and user-specified characteristics
 
-  // FIXME: Make this darwin-only.
   if (CPUString.empty())
-    // We default to Cyclone for now, on Darwin.
-    CPUString = "cyclone";
+    CPUString = "generic";
 
   ParseSubtargetFeatures(CPUString, FS);
 }