[clang] [clang] Set linkage name for atexit destructor debug info (PR #189794)

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github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Windows-->
# :window: Windows x64 Test Results

* 53472 tests passed
* 1055 tests skipped
* 1 test failed

## Failed Tests
(click on a test name to see its output)

### Clang
<details>
<summary>Clang.DebugInfo/CXX/aix-static-init.cpp</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
c:\_work\llvm-project\llvm-project\build\bin\clang.exe -cc1 -internal-isystem C:\_work\llvm-project\llvm-project\build\lib\clang\23\include -nostdsysteminc -triple powerpc-ibm-aix-xcoff -emit-llvm -x c++      -debug-info-kind=limited < C:\_work\llvm-project\llvm-project\clang\test\DebugInfo\CXX\aix-static-init.cpp |    c:\_work\llvm-project\llvm-project\build\bin\filecheck.exe C:\_work\llvm-project\llvm-project\clang\test\DebugInfo\CXX\aix-static-init.cpp
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\clang.exe' -cc1 -internal-isystem 'C:\_work\llvm-project\llvm-project\build\lib\clang\23\include' -nostdsysteminc -triple powerpc-ibm-aix-xcoff -emit-llvm -x c++ -debug-info-kind=limited
# note: command had no output on stdout or stderr
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\filecheck.exe' 'C:\_work\llvm-project\llvm-project\clang\test\DebugInfo\CXX\aix-static-init.cpp'
# .---command stderr------------
# | C:\_work\llvm-project\llvm-project\clang\test\DebugInfo\CXX\aix-static-init.cpp:55:11: error: CHECK: expected string not found in input
# | // CHECK: ![[DBGVAR16]] = distinct !DISubprogram(name: "__cxx_global_var_init", scope: !{{[0-9]+}}, file: !{{[0-9]+}}, type: !{{[0-9]+}}, flags: DIFlagArtificial, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition, unit: !{{[0-9]+}})
# |           ^
# | <stdin>:65:2: note: scanning from here
# | }
# |  ^
# | <stdin>:65:2: note: with "DBGVAR16" equal to "14"
# | }
# |  ^
# | 
# | Input file: <stdin>
# | Check file: C:\_work\llvm-project\llvm-project\clang\test\DebugInfo\CXX\aix-static-init.cpp
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             .
# |             .
# |             .
# |            60: ; Function Attrs: noinline nounwind 
# |            61: define internal void @_GLOBAL__D_a() #0 !dbg !28 { 
# |            62: entry: 
# |            63:  call void @__finalize_v(), !dbg !29 
# |            64:  ret void 
# |            65: } 
# | check:55'0      X error: no match found
# | check:55'1        with "DBGVAR16" equal to "14"
# |            66:  
# | check:55'0     ~
# |            67: attributes #0 = { noinline nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" } 
# | check:55'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            68: attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" } 
# | check:55'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            69: attributes #2 = { nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" } 
# | check:55'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            70: attributes #3 = { nounwind } 
# | check:55'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             .
# |             .
# |             .
# | >>>>>>
# `-----------------------------
# error: command failed with exit status: 1

--

```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/189794