[llvm] New AArch64CodeLayoutOpt pass for code layout optimizations. (PR #184434)

[via llvm-commits]

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Linux-->
# :penguin: Linux x64 Test Results

* 3134 tests passed
* 7 tests skipped

All executed tests passed, but another part of the build **failed**. Click on a failure below to see the details.

<details>
<summary>lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64CodeLayoutOpt.cpp.o</summary>

```
FAILED: lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64CodeLayoutOpt.cpp.o
sccache /opt/llvm/bin/clang++ -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GLIBCXX_USE_CXX11_ABI=1 -D_GNU_SOURCE -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/gha/actions-runner/_work/llvm-project/llvm-project/build/lib/Target/AArch64 -I/home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Target/AArch64 -I/home/gha/actions-runner/_work/llvm-project/llvm-project/build/include -I/home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include -gmlt -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17 -fvisibility=hidden -UNDEBUG -fno-exceptions -funwind-tables -fno-rtti -MD -MT lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64CodeLayoutOpt.cpp.o -MF lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64CodeLayoutOpt.cpp.o.d -o lib/Target/AArch64/CMakeFiles/LLVMAArch64CodeGen.dir/AArch64CodeLayoutOpt.cpp.o -c /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Target/AArch64/AArch64CodeLayoutOpt.cpp
/home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Target/AArch64/AArch64CodeLayoutOpt.cpp:55:1: error: a type specifier is required for all declarations
55 | STATISTIC(NumFunctionsAligned,
| ^
/home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Target/AArch64/AArch64CodeLayoutOpt.cpp:55:11: error: use of undeclared identifier 'NumFunctionsAligned'
55 | STATISTIC(NumFunctionsAligned,
|           ^~~~~~~~~~~~~~~~~~~
/home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Target/AArch64/AArch64CodeLayoutOpt.cpp:57:1: error: a type specifier is required for all declarations
57 | STATISTIC(NumFcmpFcselPairsDetected,
| ^
/home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Target/AArch64/AArch64CodeLayoutOpt.cpp:57:11: error: use of undeclared identifier 'NumFcmpFcselPairsDetected'
57 | STATISTIC(NumFcmpFcselPairsDetected,
|           ^~~~~~~~~~~~~~~~~~~~~~~~~
/home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Target/AArch64/AArch64CodeLayoutOpt.cpp:59:1: error: a type specifier is required for all declarations
59 | STATISTIC(NumCmpCselPairsDetected,
| ^
/home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Target/AArch64/AArch64CodeLayoutOpt.cpp:59:11: error: use of undeclared identifier 'NumCmpCselPairsDetected'
59 | STATISTIC(NumCmpCselPairsDetected,
|           ^~~~~~~~~~~~~~~~~~~~~~~
/home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Target/AArch64/AArch64CodeLayoutOpt.cpp:143:13: error: use of undeclared identifier 'NumFcmpFcselPairsDetected'
143 |           ++NumFcmpFcselPairsDetected;
|             ^~~~~~~~~~~~~~~~~~~~~~~~~
/home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Target/AArch64/AArch64CodeLayoutOpt.cpp:183:13: error: use of undeclared identifier 'NumCmpCselPairsDetected'
183 |           ++NumCmpCselPairsDetected;
|             ^~~~~~~~~~~~~~~~~~~~~~~
/home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Target/AArch64/AArch64CodeLayoutOpt.cpp:217:7: error: use of undeclared identifier 'NumFunctionsAligned'
217 |     ++NumFunctionsAligned;
|       ^~~~~~~~~~~~~~~~~~~
9 errors generated.
```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/184434