mizvekov added inline comments.
================
Comment at: clang/lib/Driver/Driver.cpp:5425
Arg *A = C.getArgs().getLastArg(options::OPT_fcrash_diagnostics_dir);
- if (CCGenDiagnostics && A) {
- SmallString<128> CrashDirectory(A->getValue());
+ const char *CrashDirectory = CCGenDiagnostics && A
+ ? A->getValue()
----------------
erichkeane wrote:
> mizvekov wrote:
> > erichkeane wrote:
> > > mizvekov wrote:
> > > > erichkeane wrote:
> > > > > `StringRef` would be better here instead, which should mean you don't
> > > > > have to create the SmallString below, and could just work in `Twine`s
> > > > > for everything.
> > > > It seems that `llvm::sys::path::append` takes twine as inputs, but it
> > > > only outputs to a SmallVectorImpl.
> > > > Unless there is something else I could use?
> > > Ah, yikes, I missed that was what was happening :/ THAT is still
> > > necessary. A Twine can be created from a stringref (and I'd still prefer
> > > one anyway), but you DO still have to make that SmallString unfortunately.
> > The Twine also can't take a nullptr (such as the case no flag passed and no
> > env variable), so we would have to use something like
> > `std::optional<Twine>`, and make the needed conversions here.
> >
> > And the Twine to SmallString copy looks unergonomic as well.
> >
> > So it seems we would need to make some little changes out of scope of this
> > MR to get that to look nicely.
> I guess i don't get the concern here? I'm suggesting just changing this from
> `const char*` to `StringRef` (which should work). Everything else below
> should 'just work' AFAIK.
Oh okay I misunderstood you! Thought you meant to make CrashDirectory a Twine.
Yeah with `StringRef` we only need to change the test:
```
if (CrashDirectory) {
```
--->
```
if (CrashDirectory.data() != nullptr) {
```
Everything else stays the same. It doesn't look cleaner, but would address your
concerns about avoiding storing a char pointer variable?
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D133082/new/
https://reviews.llvm.org/D133082
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