[PATCH] D144006: [DebugMetadata][DwarfDebug] Support function-local types in lexical block scopes (5/7)

[Juan Manuel Martinez Caamaño via Phabricator via llvm-commits]

jmmartinez accepted this revision.
jmmartinez added inline comments.
This revision is now accepted and ready to land.


================
Comment at: llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp:712-714
+      assert(!getAbstractScopeDIEs().count(DS) &&
+             "Abstract DIE for this scope exists!");
+      getAbstractScopeDIEs()[DS] = ScopeDIE;
----------------
krisb wrote:
> jmmartinez wrote:
> > NIT: You could use `insert/try_emplace` instead of using `count` and `operator[]`. The assertion would become something like:
> > ```
> > auto Inserted = getAbstractScopeDIEs().try_emplace(DS, ScopeDIE);
> > assert(Inserted.second && "Abstract DIE for this scope exists!");
> > return ScopeDIE;
> > ```
> I'd slightly prefer to keep the original code as it looks a bit more readable to me (in your example, there should be another line to void out unused `Inserted` variable, otherwise it'd cause a warning). 
> Additional `count()` call in the `assert()` doesn't seem too expensive to me, but if you still think `try_emplace()` is better, I'll change to it.
Ok for me. If the use of count was outside the assert I would have argued against.


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  https://reviews.llvm.org/D144006/new/

https://reviews.llvm.org/D144006