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================
Comment at: clang/lib/Driver/ToolChains/Clang.cpp:6497
+                         options::OPT_fno_aligned_allocation) &&
+        LanguageStandard == "-std=c++17")
+      CmdArgs.push_back("-faligned-allocation");
----------------
Only for C++17, and not C++17 and above?


================
Comment at: clang/lib/Driver/ToolChains/Clang.cpp:6641
   // by default.
   if (Arg *A = Args.getLastArg(options::OPT_faligned_allocation,
                                options::OPT_fno_aligned_allocation,
----------------
steplong wrote:
> There's a check here for faligned-allocation, but I wasn't sure how to get 
> the c++ standard here. Also, I couldn't figure a clean way to compare if the 
> standard was c++17 onwards, so I just enabled -faligned-allocation for C++17 
> above
What I would do is to compute a boolean above and use it as the default value 
here. The -cc1 line should be canonical, it shouldn't have duplicate, 
potentially contradictory flags.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D127641/new/

https://reviews.llvm.org/D127641

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