[llvm][NFC] AutoUpgrade l case

[urnathan]

Summary

The other lifetime and invariant intrinsic checks were unnecessary and recently removed. Hurrah!

Do a bit more cleanup.

Drop unneeded case 'l':. Clean up bracing & whitespace.

[nikic]

LG

llvm/lib/IR/AutoUpgrade.cpp

static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
   case 'f':
     if (Name.startswith("flt.rounds")) {
       rename(F);
       NewFn = Intrinsic::getDeclaration(F->getParent(), Intrinsic::get_rounding);
       return true;
     }
     break;
   case 'i':
-  case 'l': {
     if (Name.startswith("invariant.group.barrier")) {
       // Rename invariant.group.barrier to launder.invariant.group
       auto Args = F->getFunctionType()->params();
       Type* ObjectPtr[1] = {Args[0]};
       rename(F);
       NewFn = Intrinsic::getDeclaration(F->getParent(),
           Intrinsic::launder_invariant_group, ObjectPtr);
       return true;
-
     }
-
     break;
-  }
   case 'm': {
     // Updating the memory intrinsics (memcpy/memmove/memset) that have an
     // alignment parameter to embedding the alignment as an attribute of
     // the pointer args.
     if (unsigned ID = StringSwitch<unsigned>(Name)
                           .StartsWith("memcpy.", Intrinsic::memcpy)
                           .StartsWith("memmove.", Intrinsic::memmove)
                           .Default(0)) {