[PATCH] D58260: [INLINER] allow inlining of blockaddresses if sole uses are callbrs

[Nick Desaulniers via Phabricator via llvm-commits]

nickdesaulniers marked an inline comment as done.
nickdesaulniers added inline comments.


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Comment at: llvm/include/llvm/Analysis/LazyCallGraph.h:1095
+          return false;
+        }) && Visited.insert(BA->getFunction()).second)
           Worklist.push_back(BA->getFunction());
----------------
nickdesaulniers wrote:
> chandlerc wrote:
> > My clang-format spidey sense tingles here...
> > 
> > 
> > Also, come to think of it, we should check the `Visited` set first even though it means hashing it twice. And I think we can use early exit to make this more clear.
> > 
> > ```
> > if (Visited.count(...))
> >   continue;
> > if (all_of(..., [](...) {
> >       if (Instruction *I = ...)
> >         return I->getFunction() == BA->getFunction();
> >       return false; // CHANGE HERE
> >     }))
> >   continue;
> > 
> > Visited.inesrt(...);
> > Worklist.push_back(...);
> > ```
> > 
> > I think this will be a lot easier to understand.
> > 
> > I've also suggested a change in behavior. If we have a *non* instruction user, I think we should conservatively walk through it. We'd need to recurse trhough it here otherwise.
> > 
> > It'd be good to add a test case along thes elines where we round trip through an extra global or something?
> > we should check the `Visited`
> > `if (Visited.count(...))`
> 
> Just triple checking that you meant `Visited.insert` (I don't mean to be pedantic, I'm just unclear)?
Oh, nvm I see `count` then `insert` later. Ok sorry for the noise.


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  https://reviews.llvm.org/D58260/new/

https://reviews.llvm.org/D58260