[llvm] [SystemZ][z/OS] Preserve filetag when rewriting files (PR #181733)

[via llvm-commits]

github-actions[bot] wrote:

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

* 130908 tests passed
* 2938 tests skipped
* 1 test failed

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

### LLVM
<details>
<summary>LLVM.ThinLTO/X86/dtlto/dtlto-cache.ll</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 3
rm -rf C:\_work\llvm-project\llvm-project\build\test\ThinLTO\X86\dtlto\Output\dtlto-cache.ll.tmp && split-file C:\_work\llvm-project\llvm-project\llvm\test\ThinLTO\X86\dtlto\dtlto-cache.ll C:\_work\llvm-project\llvm-project\build\test\ThinLTO\X86\dtlto\Output\dtlto-cache.ll.tmp && cd C:\_work\llvm-project\llvm-project\build\test\ThinLTO\X86\dtlto\Output\dtlto-cache.ll.tmp
# executed command: rm -rf 'C:\_work\llvm-project\llvm-project\build\test\ThinLTO\X86\dtlto\Output\dtlto-cache.ll.tmp'
# note: command had no output on stdout or stderr
# executed command: split-file 'C:\_work\llvm-project\llvm-project\llvm\test\ThinLTO\X86\dtlto\dtlto-cache.ll' 'C:\_work\llvm-project\llvm-project\build\test\ThinLTO\X86\dtlto\Output\dtlto-cache.ll.tmp'
# note: command had no output on stdout or stderr
# executed command: cd 'C:\_work\llvm-project\llvm-project\build\test\ThinLTO\X86\dtlto\Output\dtlto-cache.ll.tmp'
# note: command had no output on stdout or stderr
# RUN: at line 6
c:\_work\llvm-project\llvm-project\build\bin\opt.exe -thinlto-bc t1.ll -o t1.bc
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\opt.exe' -thinlto-bc t1.ll -o t1.bc
# note: command had no output on stdout or stderr
# RUN: at line 7
c:\_work\llvm-project\llvm-project\build\bin\opt.exe -thinlto-bc t2.ll -o t2.bc
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\opt.exe' -thinlto-bc t2.ll -o t2.bc
# note: command had no output on stdout or stderr
# RUN: at line 10
touch t1.o t2.o
# executed command: touch t1.o t2.o
# note: command had no output on stdout or stderr
# RUN: at line 13
mkdir C:\_work\llvm-project\llvm-project\build\test\ThinLTO\X86\dtlto\Output\dtlto-cache.ll.tmp/out && cd C:\_work\llvm-project\llvm-project\build\test\ThinLTO\X86\dtlto\Output\dtlto-cache.ll.tmp/out
# executed command: mkdir 'C:\_work\llvm-project\llvm-project\build\test\ThinLTO\X86\dtlto\Output\dtlto-cache.ll.tmp/out'
# note: command had no output on stdout or stderr
# executed command: cd 'C:\_work\llvm-project\llvm-project\build\test\ThinLTO\X86\dtlto\Output\dtlto-cache.ll.tmp/out'
# note: command had no output on stdout or stderr
# RUN: at line 26
c:\_work\llvm-project\llvm-project\build\bin\llvm-lto2.exe run ../t1.bc ../t2.bc -o t.o -cache-dir cache-dir -dtlto-distributor="C:\Python312\python.exe" -dtlto-distributor-arg=C:\_work\llvm-project\llvm-project\llvm/utils/dtlto/mock.py,../t1.o,../t2.o -r=../t1.bc,t1,px -r=../t2.bc,t2,px
# executed command: 'c:\_work\llvm-project\llvm-project\build\bin\llvm-lto2.exe' run ../t1.bc ../t2.bc -o t.o -cache-dir cache-dir '-dtlto-distributor=C:\Python312\python.exe' '-dtlto-distributor-arg=C:\_work\llvm-project\llvm-project\llvm/utils/dtlto/mock.py,../t1.o,../t2.o' -r=../t1.bc,t1,px -r=../t2.bc,t2,px
# .---command stderr------------
# | llvm-lto2: LTO::run failed: Failed to open cache file cache-dir\llvmcache-76218709F3366AFDA2917C6FD03BE538F118960F: invalid argument
# | 
# `-----------------------------
# 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/181733