qiongsiwu1 added inline comments.

================
Comment at: clang/lib/Driver/ToolChains/AIX.cpp:440
+      StringRef Val = A->getValue();
+      if (Val == "atomic" || Val == "prefer-atomic")
+        CmdArgs.push_back("-latomic");
----------------
This check here is copied from 
https://github.com/llvm/llvm-project/blob/77596e6b167bf0a5efa790597d6b75ac5e685b55/clang/lib/Driver/ToolChains/Clang.cpp#L867,
 and I don't think it is good to copy this particular code over because we are 
doing the same check twice at different places and the code can go out of sync. 

May I get some suggestions to avoid duplicating the code? Thanks! 


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D159137/new/

https://reviews.llvm.org/D159137

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