Save the optimization level the subtarget was created with in a

member variable and sink the initialization of crbits into the
subtarget feature reset code.

No functional change, but this refactor will be used in a future
commit.

llvm-svn: 208726

llvm/lib/Target/PowerPC/PPCSubtarget.cpp

@@ -35,22 +35,10 @@ using namespace llvm;
 PPCSubtarget::PPCSubtarget(const std::string &TT, const std::string &CPU,
                            const std::string &FS, bool is64Bit,
                            CodeGenOpt::Level OptLevel)
-  : PPCGenSubtargetInfo(TT, CPU, FS)
-  , IsPPC64(is64Bit)
-  , TargetTriple(TT) {
+    : PPCGenSubtargetInfo(TT, CPU, FS), IsPPC64(is64Bit), TargetTriple(TT),
+      OptLevel(OptLevel) {
   initializeEnvironment();
-
-  std::string FullFS = FS;
-
-  // At -O2 and above, track CR bits as individual registers.
-  if (OptLevel >= CodeGenOpt::Default) {
-    if (!FullFS.empty())
-      FullFS = "+crbits," + FullFS;
-    else
-      FullFS = "+crbits";
-  }
-
-  resetSubtargetFeatures(CPU, FullFS);
+  resetSubtargetFeatures(CPU, FS);
 }
 
 /// SetJITMode - This is called to inform the subtarget info that we are
@@ -140,6 +128,14 @@ void PPCSubtarget::resetSubtargetFeatures(StringRef CPU, StringRef FS) {
       FullFS = "+64bit";
   }
 
+  // At -O2 and above, track CR bits as individual registers.
+  if (OptLevel >= CodeGenOpt::Default) {
+    if (!FullFS.empty())
+      FullFS = "+crbits," + FullFS;
+    else
+      FullFS = "+crbits";
+  }
+
   // Parse features string.
   ParseSubtargetFeatures(CPUName, FullFS);
 

llvm/lib/Target/PowerPC/PPCSubtarget.h

@@ -99,6 +99,9 @@ protected:
   /// TargetTriple - What processor and OS we're targeting.
   Triple TargetTriple;
 
+  /// OptLevel - What default optimization level we're emitting code for.
+  CodeGenOpt::Level OptLevel;
+
 public:
   /// This constructor initializes the data members to match that
   /// of the specified triple.