[llvm] [AArch64] Do not mark homogeneous prolog/epilog functions optnone (PR #117959)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `libc-x86_64-debian-gcc-fullbuild-dbg` running on `libc-x86_64-debian-fullbuild` while building `llvm` at step 4 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/131/builds/11343

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

```
Step 4 (annotate) failure: 'python ../llvm-zorg/zorg/buildbot/builders/annotated/libc-linux.py ...' (failure)
...
[ RUN      ] LlvmLibcRoundToIntegerTest.RoundNumbers
[       OK ] LlvmLibcRoundToIntegerTest.RoundNumbers (8 us)
[ RUN      ] LlvmLibcRoundToIntegerTest.SubnormalRange
[       OK ] LlvmLibcRoundToIntegerTest.SubnormalRange (1287 ms)
Ran 3 tests.  PASS: 3  FAIL: 0
[1101/1102] Running unit test libc.test.src.time.nanosleep_test.__unit__
[==========] Running 1 test from 1 test suite.
[ RUN      ] LlvmLibcNanosleep.SmokeTest
[       OK ] LlvmLibcNanosleep.SmokeTest (43 us)
Ran 1 tests.  PASS: 1  FAIL: 0
command timed out: 1200 seconds without output running [b'python', b'../llvm-zorg/zorg/buildbot/builders/annotated/libc-linux.py', b'--debug'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=1263.424914
Step 8 (libc-unit-tests) failure: libc-unit-tests (failure)
...
[       OK ] LlvmLibcStrtoint64Test.DecodeInOtherBases (432 ms)
[ RUN      ] LlvmLibcStrtoint64Test.CleanBaseSixteenDecode
[       OK ] LlvmLibcStrtoint64Test.CleanBaseSixteenDecode (10 us)
[ RUN      ] LlvmLibcStrtoint64Test.MessyBaseSixteenDecode
[       OK ] LlvmLibcStrtoint64Test.MessyBaseSixteenDecode (3 us)
[ RUN      ] LlvmLibcStrtoint64Test.AutomaticBaseSelection
[       OK ] LlvmLibcStrtoint64Test.AutomaticBaseSelection (4 us)
[ RUN      ] LlvmLibcStrtouint64Test.InvalidBase
[       OK ] LlvmLibcStrtouint64Test.InvalidBase (3 us)
[ RUN      ] LlvmLibcStrtouint64Test.CleanBaseTenDecode
[       OK ] LlvmLibcStrtouint64Test.CleanBaseTenDecode (7 us)
[ RUN      ] LlvmLibcStrtouint64Test.MessyBaseTenDecode
[       OK ] LlvmLibcStrtouint64Test.MessyBaseTenDecode (7 us)
[ RUN      ] LlvmLibcStrtouint64Test.DecodeInOtherBases
[       OK ] LlvmLibcStrtouint64Test.DecodeInOtherBases (285 ms)
[ RUN      ] LlvmLibcStrtouint64Test.CleanBaseSixteenDecode
[       OK ] LlvmLibcStrtouint64Test.CleanBaseSixteenDecode (10 us)
[ RUN      ] LlvmLibcStrtouint64Test.MessyBaseSixteenDecode
[       OK ] LlvmLibcStrtouint64Test.MessyBaseSixteenDecode (3 us)
[ RUN      ] LlvmLibcStrtouint64Test.AutomaticBaseSelection
[       OK ] LlvmLibcStrtouint64Test.AutomaticBaseSelection (4 us)
Ran 14 tests.  PASS: 14  FAIL: 0
[1099/1102] Running unit test libc.test.src.math.smoke.lrintl_test.__unit__
[==========] Running 3 tests from 1 test suite.
[ RUN      ] LlvmLibcRoundToIntegerTest.InfinityAndNaN
[       OK ] LlvmLibcRoundToIntegerTest.InfinityAndNaN (6 us)
[ RUN      ] LlvmLibcRoundToIntegerTest.RoundNumbers
[       OK ] LlvmLibcRoundToIntegerTest.RoundNumbers (8 us)
[ RUN      ] LlvmLibcRoundToIntegerTest.SubnormalRange
[       OK ] LlvmLibcRoundToIntegerTest.SubnormalRange (1281 ms)
Ran 3 tests.  PASS: 3  FAIL: 0
[1100/1102] Running unit test libc.test.src.math.smoke.llrintl_test.__unit__
[==========] Running 3 tests from 1 test suite.
[ RUN      ] LlvmLibcRoundToIntegerTest.InfinityAndNaN
[       OK ] LlvmLibcRoundToIntegerTest.InfinityAndNaN (7 us)
[ RUN      ] LlvmLibcRoundToIntegerTest.RoundNumbers
[       OK ] LlvmLibcRoundToIntegerTest.RoundNumbers (8 us)
[ RUN      ] LlvmLibcRoundToIntegerTest.SubnormalRange
[       OK ] LlvmLibcRoundToIntegerTest.SubnormalRange (1287 ms)
Ran 3 tests.  PASS: 3  FAIL: 0
[1101/1102] Running unit test libc.test.src.time.nanosleep_test.__unit__
[==========] Running 1 test from 1 test suite.
[ RUN      ] LlvmLibcNanosleep.SmokeTest
[       OK ] LlvmLibcNanosleep.SmokeTest (43 us)
Ran 1 tests.  PASS: 1  FAIL: 0

command timed out: 1200 seconds without output running [b'python', b'../llvm-zorg/zorg/buildbot/builders/annotated/libc-linux.py', b'--debug'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=1263.424914

```

</details>

https://github.com/llvm/llvm-project/pull/117959