[llvm] [CodeGen][ARM64EC] Don't treat guest exit thunks as indirect calls (PR #165885)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-darwin` running on `doug-worker-3` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/23/builds/15239

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'cross-project-tests :: debuginfo-tests/llgdb-tests/static-member-2.cpp' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
Running debugger
Debugger output was:

--
Command Output (stderr):
--
/Users/buildbot/buildbot-root/x86_64-darwin/build/bin/clang --driver-mode=g++ --target=x86_64-apple-darwin23.6.0 -O0 -g /Volumes/RAMDisk/buildbot-root/x86_64-darwin/llvm-project/cross-project-tests/debuginfo-tests/llgdb-tests/static-member-2.cpp -o /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/projects/cross-project-tests/debuginfo-tests/llgdb-tests/Output/static-member-2.cpp.tmp -c # RUN: at line 1
+ /Users/buildbot/buildbot-root/x86_64-darwin/build/bin/clang --driver-mode=g++ --target=x86_64-apple-darwin23.6.0 -O0 -g /Volumes/RAMDisk/buildbot-root/x86_64-darwin/llvm-project/cross-project-tests/debuginfo-tests/llgdb-tests/static-member-2.cpp -o /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/projects/cross-project-tests/debuginfo-tests/llgdb-tests/Output/static-member-2.cpp.tmp -c
/Users/buildbot/buildbot-root/x86_64-darwin/build/bin/clang --driver-mode=g++ --target=x86_64-apple-darwin23.6.0 /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/projects/cross-project-tests/debuginfo-tests/llgdb-tests/Output/static-member-2.cpp.tmp -o /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/projects/cross-project-tests/debuginfo-tests/llgdb-tests/Output/static-member-2.cpp.tmp.out # RUN: at line 2
+ /Users/buildbot/buildbot-root/x86_64-darwin/build/bin/clang --driver-mode=g++ --target=x86_64-apple-darwin23.6.0 /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/projects/cross-project-tests/debuginfo-tests/llgdb-tests/Output/static-member-2.cpp.tmp -o /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/projects/cross-project-tests/debuginfo-tests/llgdb-tests/Output/static-member-2.cpp.tmp.out
PYTHON_EXEC_PATH=/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/bin/python3.9 LLDB_PYTHON_PATH=/Users/buildbot/buildbot-root/x86_64-darwin/build/./lib/python3.9/site-packages /Users/buildbot/buildbot-root/x86_64-darwin/llvm-project/cross-project-tests/debuginfo-tests/llgdb-tests/test_debuginfo.pl /Volumes/RAMDisk/buildbot-root/x86_64-darwin/llvm-project/cross-project-tests/debuginfo-tests/llgdb-tests/static-member-2.cpp /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/projects/cross-project-tests/debuginfo-tests/llgdb-tests/Output/static-member-2.cpp.tmp.out # RUN: at line 3
+ PYTHON_EXEC_PATH=/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/bin/python3.9
+ LLDB_PYTHON_PATH=/Users/buildbot/buildbot-root/x86_64-darwin/build/./lib/python3.9/site-packages
+ /Users/buildbot/buildbot-root/x86_64-darwin/llvm-project/cross-project-tests/debuginfo-tests/llgdb-tests/test_debuginfo.pl /Volumes/RAMDisk/buildbot-root/x86_64-darwin/llvm-project/cross-project-tests/debuginfo-tests/llgdb-tests/static-member-2.cpp /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/projects/cross-project-tests/debuginfo-tests/llgdb-tests/Output/static-member-2.cpp.tmp.out
cat: /Volumes/RAMDisk/buildbot-root/x86_64-darwin/build/projects/cross-project-tests/debuginfo-tests/llgdb-tests/Output/static-member-2.cpp.gdb.output: No such file or directory

--

********************


```

</details>

https://github.com/llvm/llvm-project/pull/165885