MCStreamer: Simplify with newFragment. NFC

llvm/lib/MC/MCMachOStreamer.cpp

@@ -161,7 +161,7 @@ void MCMachOStreamer::emitLabel(MCSymbol *Symbol, SMLoc Loc) {
   // We have to create a new fragment if this is an atom defining symbol,
   // fragments cannot span atoms.
   if (cast<MCSymbolMachO>(Symbol)->isSymbolLinkerVisible())
-    insert(getContext().allocFragment<MCFragment>());
+    newFragment();
 
   MCObjectStreamer::emitLabel(Symbol, Loc);
 

llvm/lib/Target/X86/MCTargetDesc/X86AsmBackend.cpp

@@ -567,7 +567,7 @@ void X86AsmBackend::emitInstructionEnd(MCObjectStreamer &OS,
   // DataFragment, so that we can get the size of instructions later in
   // MCAssembler::relaxBoundaryAlign. The easiest way is to insert a new empty
   // DataFragment.
-  OS.insert(OS.getContext().allocFragment<MCFragment>());
+  OS.newFragment();
 
   // Update the maximum alignment on the current section if necessary.
   MCSection *Sec = OS.getCurrentSectionOnly();