[llvm] [PowerPC] Retire PPCExpandISel pass (PR #84289)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-x86_64-linux` running on `sanitizer-buildbot2` while building `llvm` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/66/builds/3129

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

```
Step 2 (annotate) failure: 'python ../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py' (failure)
...
[379/384] Generating MSAN_INST_GTEST.gtest-all.cc.x86_64.o
[380/384] Generating MSAN_INST_TEST_OBJECTS.msan_test.cpp.x86_64-with-call.o
[381/384] Generating Msan-x86_64-with-call-Test
[382/384] Generating MSAN_INST_TEST_OBJECTS.msan_test.cpp.x86_64.o
[383/384] Generating Msan-x86_64-Test
[383/384] Running compiler_rt regression tests
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/utils/lit/lit/main.py:72: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 10215 tests, 88 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90..
TIMEOUT: SanitizerCommon-hwasan-x86_64-Linux :: Posix/fork_threaded.c (10215 of 10215)
******************** TEST 'SanitizerCommon-hwasan-x86_64-Linux :: Posix/fork_threaded.c' FAILED ********************
Exit Code: -9
Timeout: Reached timeout of 900 seconds

Command Output (stderr):
--
RUN: at line 1: /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang  -gline-tables-only -fsanitize=hwaddress -fuse-ld=lld -fsanitize-hwaddress-experimental-aliasing  -m64 -funwind-tables  -I/home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test -ldl -O0 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/sanitizer_common/TestCases/Posix/fork_threaded.c -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp && env HWASAN_OPTIONS=die_after_fork=0  /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp
+ /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang -gline-tables-only -fsanitize=hwaddress -fuse-ld=lld -fsanitize-hwaddress-experimental-aliasing -m64 -funwind-tables -I/home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test -ldl -O0 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/sanitizer_common/TestCases/Posix/fork_threaded.c -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp
+ env HWASAN_OPTIONS=die_after_fork=0 /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp
==2375551==ERROR: HWAddressSanitizer: tag-mismatch on address 0x6816000000b0 at pc 0x56b0501dcc97
READ of size 160 at 0x6816000000b0 tags: 04/07(65) (ptr/mem) in thread T0

=================================================================
==2375457==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 780 byte(s) in 1 object(s) allocated from:
    #0 0x56b0501d0f19 in calloc /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:127:3
    #1 0x56b0502b27eb in llvm::safe_calloc(unsigned long, unsigned long) llvm-link

Direct leak of 152 byte(s) in 5 object(s) allocated from:
    #0 0x56b0501d0965 in aligned_alloc /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:58:3
    #1 0x56b0502c00af in llvm::allocate_buffer(unsigned long, unsigned long) llvm-link

Indirect leak of 1640 byte(s) in 38 object(s) allocated from:
    #0 0x56b0501d0965 in aligned_alloc /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:58:3
    #1 0x56b0502c00af in llvm::allocate_buffer(unsigned long, unsigned long) llvm-link

SUMMARY: HWAddressSanitizer: 2572 byte(s) leaked in 44 allocation(s).
==2815651==Unable to get registers from thread 2375527.

--

********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.. 
Slowest Tests:
--------------------------------------------------------------------------
900.04s: SanitizerCommon-hwasan-x86_64-Linux :: Posix/fork_threaded.c
195.76s: libFuzzer-x86_64-default-Linux :: out-of-process-fuzz.test
189.86s: libFuzzer-x86_64-libcxx-Linux :: out-of-process-fuzz.test
Step 9 (test compiler-rt symbolizer) failure: test compiler-rt symbolizer (failure)
...
[379/384] Generating MSAN_INST_GTEST.gtest-all.cc.x86_64.o
[380/384] Generating MSAN_INST_TEST_OBJECTS.msan_test.cpp.x86_64-with-call.o
[381/384] Generating Msan-x86_64-with-call-Test
[382/384] Generating MSAN_INST_TEST_OBJECTS.msan_test.cpp.x86_64.o
[383/384] Generating Msan-x86_64-Test
[383/384] Running compiler_rt regression tests
llvm-lit: /home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/utils/lit/lit/main.py:72: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 900 seconds was requested on the command line. Forcing timeout to be 900 seconds.
-- Testing: 10215 tests, 88 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90..
TIMEOUT: SanitizerCommon-hwasan-x86_64-Linux :: Posix/fork_threaded.c (10215 of 10215)
******************** TEST 'SanitizerCommon-hwasan-x86_64-Linux :: Posix/fork_threaded.c' FAILED ********************
Exit Code: -9
Timeout: Reached timeout of 900 seconds

Command Output (stderr):
--
RUN: at line 1: /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang  -gline-tables-only -fsanitize=hwaddress -fuse-ld=lld -fsanitize-hwaddress-experimental-aliasing  -m64 -funwind-tables  -I/home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test -ldl -O0 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/sanitizer_common/TestCases/Posix/fork_threaded.c -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp && env HWASAN_OPTIONS=die_after_fork=0  /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp
+ /home/b/sanitizer-x86_64-linux/build/build_default/./bin/clang -gline-tables-only -fsanitize=hwaddress -fuse-ld=lld -fsanitize-hwaddress-experimental-aliasing -m64 -funwind-tables -I/home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test -ldl -O0 /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/test/sanitizer_common/TestCases/Posix/fork_threaded.c -o /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp
+ env HWASAN_OPTIONS=die_after_fork=0 /home/b/sanitizer-x86_64-linux/build/build_default/runtimes/runtimes-bins/compiler-rt/test/sanitizer_common/hwasan-x86_64-Linux/Posix/Output/fork_threaded.c.tmp
==2375551==ERROR: HWAddressSanitizer: tag-mismatch on address 0x6816000000b0 at pc 0x56b0501dcc97
READ of size 160 at 0x6816000000b0 tags: 04/07(65) (ptr/mem) in thread T0

=================================================================
==2375457==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 780 byte(s) in 1 object(s) allocated from:
    #0 0x56b0501d0f19 in calloc /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:127:3
    #1 0x56b0502b27eb in llvm::safe_calloc(unsigned long, unsigned long) llvm-link

Direct leak of 152 byte(s) in 5 object(s) allocated from:
    #0 0x56b0501d0965 in aligned_alloc /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:58:3
    #1 0x56b0502c00af in llvm::allocate_buffer(unsigned long, unsigned long) llvm-link

Indirect leak of 1640 byte(s) in 38 object(s) allocated from:
    #0 0x56b0501d0965 in aligned_alloc /home/b/sanitizer-x86_64-linux/build/llvm-project/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:58:3
    #1 0x56b0502c00af in llvm::allocate_buffer(unsigned long, unsigned long) llvm-link

SUMMARY: HWAddressSanitizer: 2572 byte(s) leaked in 44 allocation(s).
==2815651==Unable to get registers from thread 2375527.

--

********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.. 
Slowest Tests:
--------------------------------------------------------------------------
900.04s: SanitizerCommon-hwasan-x86_64-Linux :: Posix/fork_threaded.c
195.76s: libFuzzer-x86_64-default-Linux :: out-of-process-fuzz.test
189.86s: libFuzzer-x86_64-libcxx-Linux :: out-of-process-fuzz.test

```

</details>

https://github.com/llvm/llvm-project/pull/84289