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


================
Comment at: clang/lib/CodeGen/BackendUtil.cpp:520
   Options.DataSections = CodeGenOpts.DataSections;
-  Options.IgnoreXCOFFVisibility = CodeGenOpts.IgnoreXCOFFVisibility;
   Options.UniqueSectionNames = CodeGenOpts.UniqueSectionNames;
----------------
DiggerLin wrote:
> jasonliu wrote:
> > DiggerLin wrote:
> > > jasonliu wrote:
> > > > DiggerLin wrote:
> > > > > jasonliu wrote:
> > > > > > Instead of just removing this line, should this get replaced with 
> > > > > > the new LangOpts option?
> > > > > I do not think we need a CodeGenOp of ignore-xcoff-visibility in 
> > > > > clang, we only need the LangOpt of the ignore-xcoff-visilbity to 
> > > > > control whether we will  generate the visibility in the IR,  when the 
> > > > > LangOpt of ignore-xcoff-visibility do not generate the visibility 
> > > > > attribute of GV in the IR. it do not need CodeGenOp of 
> > > > > ignore-xcoff-visibility any more for the clang .
> > > > > 
> > > > > we have still CodeGen ignore-xcoff-visibility op in  llc.
> > > > We removed the visibility from IR level with this patch. But there is 
> > > > also visibility settings coming from CodeGen part of clang, which needs 
> > > > to get ignore when we are doing the code gen in llc. So I think you 
> > > > still need to set the options correct for llc.
> > > yes we have the set the options correct for llc in the code.
> > > 
> > > in the source file llvm/lib/CodeGen/CommandFlags.cpp, we have (in the 
> > > patch https://reviews.llvm.org/D87451 add new option 
> > > -mignore-xcoff-visibility) , the function
> > > TargetOptions codegen::InitTargetOptionsFromCodeGenFlags() {
> > > ....
> > > Options.IgnoreXCOFFVisibility = getIgnoreXCOFFVisibility(); 
> > > ...}
> > > 
> > What I'm saying is... 
> > I think we need a line like this:
> > `Options.IgnoreXCOFFVisibility = LangOpts.IgnoreXCOFFVisibility;`
> > so that when you invoke clang, backend would get the correct setting as 
> > well. 
> I do not think so, from the clang FE, we do not generated the visibility in 
> the IR. so there is no need these line.
or we can say that because we do not set the hidden visibility into the 
GlobalValue , so we do not need the 
Options.IgnoreXCOFFVisibility = LangOpts.IgnoreXCOFFVisibility;


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D89986/new/

https://reviews.llvm.org/D89986

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