jyu2 added a comment.

Hi @rnk,

Thank you so much for the suggestion.

>> Before we do that, you should be able to delete the logic in 
>> CodeGenModule::getFunctionLinkage to handle inheriting constructor thunks. 
>> Your change should have the same effect. Can you do that, and check that it 
>> passes tests? If we do that, we're don't have to accumulate extra special 
>> case code, we've just moved the special case code earlier, up from codegen 
>> into the earlier linkage calculation.

Yes, you are right.   I remove the code in CodeGenModule.cpp, the test passes 
for check-clang.



================
Comment at: clang/test/CodeGenCXX/ms-inheriting-ctor.cpp:41
+
+// CHECK-LABEL: define internal noundef ptr 
@"??0?$B@_N@@QEAA@AEBVF@@AEBUA@@@Z"(ptr noundef nonnull returned align 1 
dereferenceable(1) %this, ptr noundef nonnull align 1 dereferenceable(1) %0, 
ptr noundef nonnull align 1 dereferenceable(1) %1) unnamed_addr #2 align 2
+// CHECK-LABEL: define linkonce_odr dso_local noundef ptr 
@"??0?$c@_NUb@@@@QEAA@AEBVF@@AEBUA@@@Z"(ptr noundef nonnull returned align 1 
dereferenceable(1) %this, ptr noundef nonnull align 1 dereferenceable(1) %p1, 
ptr noundef nonnull align 1 dereferenceable(1) %d) unnamed_addr #2 comdat align 
2
----------------
rnk wrote:
> To make this less fragile, can you come up with a way to use `CHECK-NOT: 
> comdat` since that's the key thing we're testing for here? You will need some 
> subsequent anchor like `entry:` or something else.
Thanks.  I changed.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D158538/new/

https://reviews.llvm.org/D158538

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