Replace string GNU Triples with llvm::Triple in MCAsmInfo subclasses and create*AsmInfo(). NFC.

Summary:
This is the first of several patches to eliminate StringRef forms of GNU
triples from the internals of LLVM. After this is complete, GNU triples
will be replaced by a more authoratitive representation in the form of
an LLVM TargetTuple.

Reviewers: rengolin

Reviewed By: rengolin

Subscribers: ted, llvm-commits, rengolin, jholewinski

Differential Revision: http://reviews.llvm.org/D10236


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239036 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/Mips/MCTargetDesc/MipsMCAsmInfo.cpp

@@ -18,8 +18,7 @@ using namespace llvm;
 
 void MipsMCAsmInfo::anchor() { }
 
-MipsMCAsmInfo::MipsMCAsmInfo(StringRef TT) {
-  Triple TheTriple(TT);
+MipsMCAsmInfo::MipsMCAsmInfo(const Triple &TheTriple) {
   if ((TheTriple.getArch() == Triple::mips) ||
       (TheTriple.getArch() == Triple::mips64))
     IsLittleEndian = false;

lib/Target/Mips/MCTargetDesc/MipsMCAsmInfo.h

@@ -17,12 +17,12 @@
 #include "llvm/MC/MCAsmInfoELF.h"
 
 namespace llvm {
-  class StringRef;
+  class Triple;
 
   class MipsMCAsmInfo : public MCAsmInfoELF {
     void anchor() override;
   public:
-    explicit MipsMCAsmInfo(StringRef TT);
+    explicit MipsMCAsmInfo(const Triple &TheTriple);
   };
 
 } // namespace llvm

lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.cpp

@@ -75,7 +75,8 @@ static MCSubtargetInfo *createMipsMCSubtargetInfo(StringRef TT, StringRef CPU,
   return X;
 }
 
-static MCAsmInfo *createMipsMCAsmInfo(const MCRegisterInfo &MRI, StringRef TT) {
+static MCAsmInfo *createMipsMCAsmInfo(const MCRegisterInfo &MRI,
+                                      const Triple &TT) {
   MCAsmInfo *MAI = new MipsMCAsmInfo(TT);
 
   unsigned SP = MRI.getDwarfRegNum(Mips::SP, true);