NFC: Make isPPC64 const and use member initializer

Author: hubert-reinterpretcast

llvm/lib/Target/PowerPC/AsmParser/PPCAsmParser.cpp

@@ -97,7 +97,7 @@ namespace {
 struct PPCOperand;
 
 class PPCAsmParser : public MCTargetAsmParser {
-  bool IsPPC64;
+  const bool IsPPC64;
 
   void Warning(SMLoc L, const Twine &Msg) { getParser().Warning(L, Msg); }
 
@@ -142,10 +142,8 @@ class PPCAsmParser : public MCTargetAsmParser {
 public:
   PPCAsmParser(const MCSubtargetInfo &STI, MCAsmParser &,
                const MCInstrInfo &MII, const MCTargetOptions &Options)
-    : MCTargetAsmParser(Options, STI, MII) {
-    // Check for 64-bit vs. 32-bit pointer mode.
-    const Triple &TheTriple = STI.getTargetTriple();
-    IsPPC64 = TheTriple.isPPC64();
+      : MCTargetAsmParser(Options, STI, MII),
+        IsPPC64(STI.getTargetTriple().isPPC64()) {
     // Initialize the set of available features.
     setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
   }