[llvm] [SanitizerCoverage] Don't let noipa affect comdat selection (PR #228182)

[Fangrui Song via llvm-commits]

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@@ -775,8 +775,10 @@ GlobalVariable *ModuleSanitizerCoverage::CreateFunctionLocalArrayInSection(
       *CurModule, ArrayTy, false, GlobalVariable::PrivateLinkage,
       Constant::getNullValue(ArrayTy), "__sancov_gen_");
 
+  // noipa doesn't affect linkage, so it is ignored when deciding on a comdat.
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MaskRay wrote:

 #228959 will improve the comment.

https://github.com/llvm/llvm-project/pull/228182