[PATCH] D73739: Exception support for basic block sections

[Fangrui Song via Phabricator via llvm-commits]

MaskRay added inline comments.


================
Comment at: llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp:1768
+  MCSymbol *ExceptionSym =
+      MBBSectionExceptionSyms.lookup(MBB->getSectionIDNum());
+  if (!ExceptionSym)
----------------
The idiom is to use `try_emplace`. If a new element is inserted, replace it.

```
auto Res = MBBSectionExceptionSyms.try_emplace(MBB->getSectionIDNum());
if (Res.second)
  Res.first->second = createTempSymbol("exception");
return Res.first->second;
```


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D73739/new/

https://reviews.llvm.org/D73739