[Bug tree-optimization/119614] [15 regression] protobuf-29.4 fails to build with -O2 (error: cannot tail-call: call and return value are different)

[sjames at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119614

--- Comment #15 from Sam James <sjames at gcc dot gnu.org> ---
Created attachment 61025
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=61025&action=edit
generated_message_tctable_lite.cc.ii.xz (LTO)

Reduction still going.

```
$ g++ -flto=auto -shared -O3 generated_message_tctable_lite.cc.ii
[...]
generated_message_tctable_lite.cc.ii: In function ‘MpRepeatedString’:
generated_message_tctable_lite.cc.ii:5456:43: error: cannot tail-call: call and
return value are different
 5456 |           [[clang::musttail]] return Error(
      |                                           ^
generated_message_tctable_lite.cc.ii:5474:43: error: cannot tail-call: call and
return value are different
 5474 |           [[clang::musttail]] return Error(
      |                                           ^
```