================ @@ -54,6 +54,12 @@ ABI Changes in This Version inline member function that contains a static local variable with a dynamic initializer is declared with ``__declspec(dllimport)``. (#GH83616). +- Fixed Microsoft name mangling of lifetime extended temporary objects. This + change corrects missing back reference registrations that could result in + incorrect back reference indexes and suprising demangled name results. Since + MSVC uses a different mangling for these objects, compatibility is not affected. + (#GH85423). ---------------- zmodem wrote:
> Commit > [e77de75](https://github.com/llvm/llvm-project/commit/e77de75d7e009daaadb03e9b1091c3a9a9c9d311) > claims that Microsoft doesn't have a mangling for these objects and that the > `$RT` mangling is a Clang invention. The claim that MSVC doesn't implement a > mangling for these doesn't seem right though. Consider > https://godbolt.org/z/n715zPbc6. Looks like things have changed then. I tried the example code with MSVC 18.00.31101.0 (from VS2013) and there the object is just `_$S1`: ``` ??__E?singleton@RT1@@2ABU1@B@@YAXXZ PROC ; ??__E?singleton@RT1@@2ABU1@B@@YAXXZ, COMDAT ; File z:\tmp\a.cc ; Line 6 push ebp mov ebp, esp push ecx call ?f@@YA?AURT1@@XZ ; f mov DWORD PTR $T1[ebp], eax mov eax, DWORD PTR $T1[ebp] mov DWORD PTR _$S1, eax mov DWORD PTR ?singleton@RT1@@2ABU1@B, OFFSET _$S1 ; RT1::singleton mov esp, ebp pop ebp ret 0 ``` https://github.com/llvm/llvm-project/pull/85529 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
