[llvm] PeepholeOpt: Immediately check if a reg_sequence compose supports a subregister (PR #128279)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-x86_64-linux-bootstrap-ubsan` running on `sanitizer-buildbot4` while building `llvm` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/25/builds/6731

<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)
...
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using ld.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/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: 89281 tests, 88 workers --
Testing:  0.. 10.. 20.
FAIL: Extra Tools Unit Tests :: clang-include-fixer/./ClangIncludeFixerTests/3/15 (23849 of 89281)
******************** TEST 'Extra Tools Unit Tests :: clang-include-fixer/./ClangIncludeFixerTests/3/15' FAILED ********************
Script(shard):
--
GTEST_OUTPUT=json:/home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/tools/extra/unittests/clang-include-fixer/./ClangIncludeFixerTests-Extra Tools Unit Tests-2647189-3-15.json GTEST_SHUFFLE=0 GTEST_TOTAL_SHARDS=15 GTEST_SHARD_INDEX=3 /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/tools/extra/unittests/clang-include-fixer/./ClangIncludeFixerTests
--

Note: This is test shard 4 of 15.
[==========] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from IncludeFixer
[ RUN      ] IncludeFixer.NestedName
future_error was thrown in -fno-exceptions mode #0 0x0000595f4056048e llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:804:13
 #1 0x0000595f4055d4e6 llvm::sys::RunSignalHandlers() /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Support/Signals.cpp:106:18
 #2 0x0000595f405610bc SignalHandler(int, siginfo_t*, void*) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:0:3
 #3 0x00007006ab445250 (/lib/x86_64-linux-gnu/libc.so.6+0x45250)
 #4 0x00007006ab4a3f1c pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0xa3f1c)
 #5 0x00007006ab44519e raise (/lib/x86_64-linux-gnu/libc.so.6+0x4519e)
 #6 0x00007006ab428902 abort (/lib/x86_64-linux-gnu/libc.so.6+0x28902)
 #7 0x00007006ab8f3a8c std::__1::__libcpp_verbose_abort(char const*, ...) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/libcxx/src/verbose_abort.cpp:62:3
 #8 0x0000595f4047ef52 std::__1::__throw_future_error[abi:nn210000](std::__1::future_errc) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/future:519:3
 #9 0x0000595f4047eead set_value<std::__1::unique_ptr<clang::include_fixer::SymbolIndex, std::__1::default_delete<clang::include_fixer::SymbolIndex> > > /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/future:624:5
#10 0x0000595f4047eead std::__1::__async_assoc_state<std::__1::unique_ptr<clang::include_fixer::SymbolIndex, std::__1::default_delete<clang::include_fixer::SymbolIndex>>, std::__1::__async_func<std::__1::function<std::__1::unique_ptr<clang::include_fixer::SymbolIndex, std::__1::default_delete<clang::include_fixer::SymbolIndex>> ()>>>::__execute() /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/future:858:11
#11 0x0000595f4047efd5 reset /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/__memory/unique_ptr.h:284:21
#12 0x0000595f4047efd5 ~unique_ptr /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/__memory/unique_ptr.h:256:71
#13 0x0000595f4047efd5 ~__tuple_leaf /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/tuple:307:7
#14 0x0000595f4047efd5 ~tuple /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/tuple:538:28
#15 0x0000595f4047efd5 operator() /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/__memory/unique_ptr.h:76:5
#16 0x0000595f4047efd5 reset /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/__memory/unique_ptr.h:287:7
#17 0x0000595f4047efd5 ~unique_ptr /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/__memory/unique_ptr.h:256:71
#18 0x0000595f4047efd5 void* std::__1::__thread_proxy[abi:nn210000]<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct>>, void (std::__1::__async_assoc_state<std::__1::unique_ptr<clang::include_fixer::SymbolIndex, std::__1::default_delete<clang::include_fixer::SymbolIndex>>, std::__1::__async_func<std::__1::function<std::__1::unique_ptr<clang::include_fixer::SymbolIndex, std::__1::default_delete<clang::include_fixer::SymbolIndex>> ()>>>::*)(), std::__1::__async_assoc_state<std::__1::unique_ptr<clang::include_fixer::SymbolIndex, std::__1::default_delete<clang::include_fixer::SymbolIndex>>, std::__1::__async_func<std::__1::function<std::__1::unique_ptr<clang::include_fixer::SymbolIndex, std::__1::default_delete<clang::include_fixer::SymbolIndex>> ()>>>*>>(void*) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/__thread/thread.h:210:1
#19 0x00007006ab4a1e2e (/lib/x86_64-linux-gnu/libc.so.6+0xa1e2e)
#20 0x00007006ab533a4c (/lib/x86_64-linux-gnu/libc.so.6+0x133a4c)

--
exit: -6
--
shard JSON output does not exist: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/tools/extra/unittests/clang-include-fixer/./ClangIncludeFixerTests-Extra Tools Unit Tests-2647189-3-15.json
********************
Step 11 (stage2/ubsan check) failure: stage2/ubsan check (failure)
...
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using ld.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using lld-link: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using ld64.lld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:512: note: using wasm-ld: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/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: 89281 tests, 88 workers --
Testing:  0.. 10.. 20.
FAIL: Extra Tools Unit Tests :: clang-include-fixer/./ClangIncludeFixerTests/3/15 (23849 of 89281)
******************** TEST 'Extra Tools Unit Tests :: clang-include-fixer/./ClangIncludeFixerTests/3/15' FAILED ********************
Script(shard):
--
GTEST_OUTPUT=json:/home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/tools/extra/unittests/clang-include-fixer/./ClangIncludeFixerTests-Extra Tools Unit Tests-2647189-3-15.json GTEST_SHUFFLE=0 GTEST_TOTAL_SHARDS=15 GTEST_SHARD_INDEX=3 /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/tools/extra/unittests/clang-include-fixer/./ClangIncludeFixerTests
--

Note: This is test shard 4 of 15.
[==========] Running 1 test from 1 test suite.
[----------] Global test environment set-up.
[----------] 1 test from IncludeFixer
[ RUN      ] IncludeFixer.NestedName
future_error was thrown in -fno-exceptions mode #0 0x0000595f4056048e llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:804:13
 #1 0x0000595f4055d4e6 llvm::sys::RunSignalHandlers() /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Support/Signals.cpp:106:18
 #2 0x0000595f405610bc SignalHandler(int, siginfo_t*, void*) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:0:3
 #3 0x00007006ab445250 (/lib/x86_64-linux-gnu/libc.so.6+0x45250)
 #4 0x00007006ab4a3f1c pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0xa3f1c)
 #5 0x00007006ab44519e raise (/lib/x86_64-linux-gnu/libc.so.6+0x4519e)
 #6 0x00007006ab428902 abort (/lib/x86_64-linux-gnu/libc.so.6+0x28902)
 #7 0x00007006ab8f3a8c std::__1::__libcpp_verbose_abort(char const*, ...) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm-project/libcxx/src/verbose_abort.cpp:62:3
 #8 0x0000595f4047ef52 std::__1::__throw_future_error[abi:nn210000](std::__1::future_errc) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/future:519:3
 #9 0x0000595f4047eead set_value<std::__1::unique_ptr<clang::include_fixer::SymbolIndex, std::__1::default_delete<clang::include_fixer::SymbolIndex> > > /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/future:624:5
#10 0x0000595f4047eead std::__1::__async_assoc_state<std::__1::unique_ptr<clang::include_fixer::SymbolIndex, std::__1::default_delete<clang::include_fixer::SymbolIndex>>, std::__1::__async_func<std::__1::function<std::__1::unique_ptr<clang::include_fixer::SymbolIndex, std::__1::default_delete<clang::include_fixer::SymbolIndex>> ()>>>::__execute() /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/future:858:11
#11 0x0000595f4047efd5 reset /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/__memory/unique_ptr.h:284:21
#12 0x0000595f4047efd5 ~unique_ptr /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/__memory/unique_ptr.h:256:71
#13 0x0000595f4047efd5 ~__tuple_leaf /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/tuple:307:7
#14 0x0000595f4047efd5 ~tuple /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/tuple:538:28
#15 0x0000595f4047efd5 operator() /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/__memory/unique_ptr.h:76:5
#16 0x0000595f4047efd5 reset /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/__memory/unique_ptr.h:287:7
#17 0x0000595f4047efd5 ~unique_ptr /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/__memory/unique_ptr.h:256:71
#18 0x0000595f4047efd5 void* std::__1::__thread_proxy[abi:nn210000]<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct>>, void (std::__1::__async_assoc_state<std::__1::unique_ptr<clang::include_fixer::SymbolIndex, std::__1::default_delete<clang::include_fixer::SymbolIndex>>, std::__1::__async_func<std::__1::function<std::__1::unique_ptr<clang::include_fixer::SymbolIndex, std::__1::default_delete<clang::include_fixer::SymbolIndex>> ()>>>::*)(), std::__1::__async_assoc_state<std::__1::unique_ptr<clang::include_fixer::SymbolIndex, std::__1::default_delete<clang::include_fixer::SymbolIndex>>, std::__1::__async_func<std::__1::function<std::__1::unique_ptr<clang::include_fixer::SymbolIndex, std::__1::default_delete<clang::include_fixer::SymbolIndex>> ()>>>*>>(void*) /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/__thread/thread.h:210:1
#19 0x00007006ab4a1e2e (/lib/x86_64-linux-gnu/libc.so.6+0xa1e2e)
#20 0x00007006ab533a4c (/lib/x86_64-linux-gnu/libc.so.6+0x133a4c)

--
exit: -6
--
shard JSON output does not exist: /home/b/sanitizer-x86_64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/tools/extra/unittests/clang-include-fixer/./ClangIncludeFixerTests-Extra Tools Unit Tests-2647189-3-15.json
********************

```

</details>

https://github.com/llvm/llvm-project/pull/128279