tree bd6d85119561f26b9a7c275e8e1e9a3145f443c6
parent cf19a0076b2a28f70ae54c9e433551402419393a
author Nathan Sidwell <nathan@acm.org> 1642693212 -0800
committer Copybara-Service <copybara-worker@google.com> 1642708240 -0800

[demangler][NFC] Small cleanups and sync

Some precursor work to adding module demangling.

* some mismatched comment and code in the demangler

* a const fn was not marked thusly

* we use std::islower.  A direct range check is smaller code (no function call),
  and we know we're in ASCII-land and later in that same function make the same
  assumption about upper-case contiguity.  Heck, maybe just drop the switch's
  precondition and rely on the optimizer to do its thing?

* the directory is cloned in two places, which had gotten out of sync.

Differential Revision: https://reviews.llvm.org/D117800

GitOrigin-RevId: 8105e404f186c6f31e08185b37f81e6da904f6d7