Propagate CPU string out of SubtargetFeatures

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72335 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMSubtarget.cpp b/lib/Target/ARM/ARMSubtarget.cpp
index 2415a85..7379f1c 100644
--- a/lib/Target/ARM/ARMSubtarget.cpp
+++ b/lib/Target/ARM/ARMSubtarget.cpp
@@ -23,14 +23,13 @@
   , UseThumbBacktraces(false)
   , IsR9Reserved(false)
   , stackAlignment(4)
+  , CPUString("generic")
   , TargetType(isELF) // Default to ELF unless otherwise specified.
   , TargetABI(ARM_ABI_APCS) {
-
   // Determine default and user specified characteristics
-  std::string CPU = "generic";
 
   // Parse features string.
-  ParseSubtargetFeatures(FS, CPU);
+  CPUString = ParseSubtargetFeatures(FS, CPUString);
 
   // Set the boolean corresponding to the current target triple, or the default
   // if one cannot be determined, to true.