[llvm] [AMDGPU] Cluster export instruction in PostRA Scheduler (PR #141399)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-key-instructions` running on `sie-linux-worker5` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/208/builds/1486

<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 'SanitizerCommon-tsan-x86_64-Linux :: vsnprintf.cpp' FAILED ********************
Exit Code: 137

Command Output (stderr):
--
/home/buildbot/buildbot-root/llvm-ki/build/./bin/clang  --driver-mode=g++ -gline-tables-only -fsanitize=thread  -m64 -funwind-tables  -I/home/buildbot/buildbot-root/llvm-ki/llvm-project/compiler-rt/test -ldl -O2 /home/buildbot/buildbot-root/llvm-ki/llvm-project/compiler-rt/test/sanitizer_common/TestCases/vsnprintf.cpp -o /home/buildbot/buildbot-root/llvm-ki/build/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/tsan-x86_64-Linux/Output/vsnprintf.cpp.tmp # RUN: at line 4
+ /home/buildbot/buildbot-root/llvm-ki/build/./bin/clang --driver-mode=g++ -gline-tables-only -fsanitize=thread -m64 -funwind-tables -I/home/buildbot/buildbot-root/llvm-ki/llvm-project/compiler-rt/test -ldl -O2 /home/buildbot/buildbot-root/llvm-ki/llvm-project/compiler-rt/test/sanitizer_common/TestCases/vsnprintf.cpp -o /home/buildbot/buildbot-root/llvm-ki/build/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/tsan-x86_64-Linux/Output/vsnprintf.cpp.tmp
env TSAN_OPTIONS=check_printf=1  /home/buildbot/buildbot-root/llvm-ki/build/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/tsan-x86_64-Linux/Output/vsnprintf.cpp.tmp 2>&1 # RUN: at line 5
+ env TSAN_OPTIONS=check_printf=1 /home/buildbot/buildbot-root/llvm-ki/build/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/tsan-x86_64-Linux/Output/vsnprintf.cpp.tmp
/home/buildbot/buildbot-root/llvm-ki/build/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/tsan-x86_64-Linux/Output/vsnprintf.cpp.script: line 2: 3113076 Killed                  env TSAN_OPTIONS=check_printf=1 /home/buildbot/buildbot-root/llvm-ki/build/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/tsan-x86_64-Linux/Output/vsnprintf.cpp.tmp 2>&1

--

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


```

</details>

https://github.com/llvm/llvm-project/pull/141399