Clean up redundant copies of Triple objects. NFC

Summary:

Reviewers: rengolin

Reviewed By: rengolin

Subscribers: llvm-commits, rengolin, jholewinski

Differential Revision: http://reviews.llvm.org/D10382

llvm-svn: 239823
diff --git a/llvm/lib/Target/X86/X86TargetMachine.cpp b/llvm/lib/Target/X86/X86TargetMachine.cpp
index ef3809b..3d6eb4f 100644
--- a/llvm/lib/Target/X86/X86TargetMachine.cpp
+++ b/llvm/lib/Target/X86/X86TargetMachine.cpp
@@ -101,7 +101,7 @@
                                    CodeGenOpt::Level OL)
     : LLVMTargetMachine(T, computeDataLayout(TT), TT, CPU, FS, Options, RM, CM,
                         OL),
-      TLOF(createTLOF(Triple(getTargetTriple()))),
+      TLOF(createTLOF(getTargetTriple())),
       Subtarget(TT, CPU, FS, *this, Options.StackAlignmentOverride) {
   // Windows stack unwinder gets confused when execution flow "falls through"
   // after a call to 'noreturn' function.
@@ -153,7 +153,7 @@
     // creation will depend on the TM and the code generation flags on the
     // function that reside in TargetOptions.
     resetTargetOptions(F);
-    I = llvm::make_unique<X86Subtarget>(Triple(TargetTriple), CPU, FS, *this,
+    I = llvm::make_unique<X86Subtarget>(TargetTriple, CPU, FS, *this,
                                         Options.StackAlignmentOverride);
   }
   return I.get();
@@ -218,7 +218,7 @@
   addPass(createX86ISelDag(getX86TargetMachine(), getOptLevel()));
 
   // For ELF, cleanup any local-dynamic TLS accesses.
-  if (Triple(TM->getTargetTriple()).isOSBinFormatELF() &&
+  if (TM->getTargetTriple().isOSBinFormatELF() &&
       getOptLevel() != CodeGenOpt::None)
     addPass(createCleanupLocalDynamicTLSPass());
 
@@ -236,7 +236,7 @@
 
 bool X86PassConfig::addPreISel() {
   // Only add this pass for 32-bit x86 Windows.
-  Triple TT(TM->getTargetTriple());
+  const Triple &TT = TM->getTargetTriple();
   if (TT.isOSWindows() && TT.getArch() == Triple::x86)
     addPass(createX86WinEHStatePass());
   return true;