[llvm] [NFC][Test] Fix PowerPC test gcov_ctr_ref_init.ll (PR #117577)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `bolt-x86_64-ubuntu-nfc` running on `bolt-worker` while building `llvm` at step 9 "test-build-bolt-check-large-bolt".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/92/builds/10412

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

```
Step 9 (test-build-bolt-check-large-bolt) failure: test (failure)
******************** TEST 'bolt-tests :: X86/clang-nolbr.test' FAILED ********************
Exit Code: 254

Command Output (stderr):
--
RUN: at line 5: mkdir -p /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/Output
+ mkdir -p /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/Output
RUN: at line 6: test -f /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/Output/clang || unzstd /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/Inputs/clang.zst -o /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/Output/clang
+ test -f /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/Output/clang
RUN: at line 9: perf record -e cycles:u -o /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp.data --    /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/Output/clang /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/Inputs/bf.cpp -O2 -std=c++11 -c -o /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp.out
+ perf record -e cycles:u -o /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp.data -- /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/Output/clang /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/Inputs/bf.cpp -O2 -std=c++11 -c -o /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp.out
Lowering default frequency rate from 4000 to 2000.
Please consider tweaking /proc/sys/kernel/perf_event_max_sample_rate.
[ perf record: Woken up 2 times to write data ]
[ perf record: Captured and wrote 0.420 MB /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp.data (10762 samples) ]
RUN: at line 13: /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/bin/perf2bolt /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/Output/clang -p /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp.data -o /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp.fdata -nl    |& /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/bin/FileCheck /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/clang-nolbr.test -check-prefix=CHECK-P2B
+ /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/bin/perf2bolt /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/Output/clang -p /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp.data -o /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp.fdata -nl
+ /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/bin/FileCheck /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/clang-nolbr.test -check-prefix=CHECK-P2B
RUN: at line 17: /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/bin/llvm-bolt /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/Output/clang -o /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp -data /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp.fdata     -relocs -reorder-blocks=ext-tsp -split-functions=3 -split-all-cold     -split-eh -icf=1 -reorder-functions=hfsort+ -use-gnu-stack     -jump-tables=move -frame-opt=hot -peepholes=all -dyno-stats    |& /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/bin/FileCheck /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/clang-nolbr.test -check-prefix=CHECK-BOLT
+ /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/bin/FileCheck /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/clang-nolbr.test -check-prefix=CHECK-BOLT
+ /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/bin/llvm-bolt /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/Output/clang -o /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp -data /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp.fdata -relocs -reorder-blocks=ext-tsp -split-functions=3 -split-all-cold -split-eh -icf=1 -reorder-functions=hfsort+ -use-gnu-stack -jump-tables=move -frame-opt=hot -peepholes=all -dyno-stats
RUN: at line 24: /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/Inputs/bf.cpp -O2 -std=c++11 -c -o /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp.out
+ /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/Inputs/bf.cpp -O2 -std=c++11 -c -o /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp.out
/home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp(_ZN4llvm3sys15PrintStackTraceERNS_11raw_ostreamE+0x1d)[0xb91357]
/home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp(_ZN4llvm3sys17RunSignalHandlersEv+0x2f)[0xb90173]
/home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp[0xb903f1]
/lib/x86_64-linux-gnu/libc.so.6(+0x42520)[0x7fa415e42520]
/home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp[0x367bb98]
/home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp[0x373a247]
/home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp[0x3739934]
/home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp(_ZN4llvm19MachineFunctionPass13runOnFunctionERNS_8FunctionE+0x52)[0x343c6e0]
/home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp[0x35b033a]
/home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp(_ZN4llvm13FPPassManager11runOnModuleERNS_6ModuleE+0x33)[0x1ae4143]
/home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp(_ZN4llvm6legacy15PassManagerImpl3runERNS_6ModuleE+0x185)[0x2219375]
/home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp(_ZN5clang17EmitBackendOutputERNS_17DiagnosticsEngineERKNS_19HeaderSearchOptionsERKNS_14CodeGenOptionsERKNS_13TargetOptionsERKNS_11LangOptionsERKN4llvm10DataLayoutEPNSE_6ModuleENS_13BackendActionESt10unique_ptrINSE_17raw_pwrite_streamESt14default_deleteISM_EE+0x825)[0x22a3455]
/home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp[0x2385f1e]
/home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp[0x389ff7c]
/home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp(_ZN5clang13CodeGenAction13ExecuteActionEv+0x36)[0x2385986]
/home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp(_ZN5clang14FrontendAction7ExecuteEv+0x24)[0x2337034]
/home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp(_ZN5clang16CompilerInstance13ExecuteActionERNS_14FrontendActionE+0x120)[0x231c0e0]
/home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp(_ZN5clang25ExecuteCompilerInvocationEPNS_16CompilerInstanceE+0x1a7)[0x23433a7]
/home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp(_Z8cc1_mainN4llvm8ArrayRefIPKcEES2_Pv+0x415)[0x2173c15]
/home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp(main+0x4da)[0x1768eea]
/lib/x86_64-linux-gnu/libc.so.6(+0x29d90)[0x7fa415e29d90]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x80)[0x7fa415e29e40]
/home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp[0x2172d29]
Stack dump:
0.	Program arguments: /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -disable-free -disable-llvm-verifier -discard-value-names -main-file-name bf.cpp -mrelocation-model static -mthread-model posix -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -momit-leaf-frame-pointer -dwarf-column-info -debugger-tuning=gdb -coverage-notes-file /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp.gcno -resource-dir /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/lib/clang/6.0.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/x86_64-linux-gnu/c++/11 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/x86_64-linux-gnu/c++/11 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/backward -internal-isystem /usr/local/include -internal-isystem /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/lib/clang/6.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86 -ferror-limit 19 -fmessage-length 0 -fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option -vectorize-loops -vectorize-slp -o /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/build/tools/bolttests/X86/Output/clang-nolbr.test.tmp.out -x c++ /home/worker/bolt-worker2/bolt-x86_64-ubuntu-nfc/bolt-tests/test/X86/Inputs/bf.cpp 
1.	<eof> parser at end of file
2.	Code generation
...

```

</details>

https://github.com/llvm/llvm-project/pull/117577