[clang] [llvm] [BPF] Return small aggregates directly in registers (PR #206876)

[via cfe-commits]

github-actions[bot] wrote:

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

* 178482 tests passed
* 3570 tests skipped
* 1 test failed

## Failed Tests
(click on a test name to see its output)

### lldb-api
<details>
<summary>lldb-api.commands/register/register_command/TestRegisters.py</summary>

```
Script:
--
/usr/bin/python3 /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/test/API/dotest.py -u CXXFLAGS -u CFLAGS --env LLVM_LIBS_DIR=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/./lib --env LLVM_INCLUDE_DIR=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/include --env LLVM_TOOLS_DIR=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin --libcxx-include-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/include/c++/v1 --libcxx-include-target-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/include/x86_64-unknown-linux-gnu/c++/v1 --libcxx-library-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./lib/x86_64-unknown-linux-gnu --triple x86_64-unknown-linux-gnu --build-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lldb-test-build --lldb-module-cache-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lldb-test-build/module-cache-lldb/lldb-api --clang-module-cache-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lldb-test-build/module-cache-clang/lldb-api --executable /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/lldb --lldb-python-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/local/lib/python3.12/dist-packages --compiler /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/clang --dsymutil /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/dsymutil --make /usr/bin/gmake --llvm-tools-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin --lldb-obj-root /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/lldb --lldb-libs-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./lib --cmake-build-type Release /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/test/API/commands/register/register_command -p TestRegisters.py
--
Exit Code: 1

Command Output (stdout):
--
Skipping the following test categories: msvcstl, dsym, pdb, gmodules, debugserver, objc

--
Command Output (stderr):
--
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_convenience_registers (TestRegisters.RegisterCommandsTestCase.test_convenience_registers)
FAIL: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_convenience_registers_16bit_with_process_attach (TestRegisters.RegisterCommandsTestCase.test_convenience_registers_16bit_with_process_attach)
Log Files:
 - /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lldb-test-build/commands/register/register_command/TestRegisters/Failure_test_convenience_registers_16bit_with_process_attach.log
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_convenience_registers_with_process_attach (TestRegisters.RegisterCommandsTestCase.test_convenience_registers_with_process_attach)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_fp_register_write (TestRegisters.RegisterCommandsTestCase.test_fp_register_write)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_fp_special_purpose_register_read (TestRegisters.RegisterCommandsTestCase.test_fp_special_purpose_register_read) (requires one of macosx, darwin, ios, tvos, watchos, bridgeos, iphonesimulator, watchsimulator, appletvsimulator) 
Log Files:
 - /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lldb-test-build/commands/register/register_command/TestRegisters/SkippedTest_test_fp_special_purpose_register_read.log
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_fs_gs_base (TestRegisters.RegisterCommandsTestCase.test_fs_gs_base)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_info_many_registers (TestRegisters.RegisterCommandsTestCase.test_info_many_registers)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_info_register (TestRegisters.RegisterCommandsTestCase.test_info_register) (skipping due to the following parameter(s): architecture) 
Log Files:
 - /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lldb-test-build/commands/register/register_command/TestRegisters/SkippedTest_test_info_register.log
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_info_unknown_register (TestRegisters.RegisterCommandsTestCase.test_info_unknown_register)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_invalid_invocation (TestRegisters.RegisterCommandsTestCase.test_invalid_invocation)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_process_must_be_stopped (TestRegisters.RegisterCommandsTestCase.test_process_must_be_stopped)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_register_commands (TestRegisters.RegisterCommandsTestCase.test_register_commands)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_register_expressions (TestRegisters.RegisterCommandsTestCase.test_register_expressions)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_register_read_fields (TestRegisters.RegisterCommandsTestCase.test_register_read_fields) (requires xml) 
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_write_unknown_register (TestRegisters.RegisterCommandsTestCase.test_write_unknown_register)
======================================================================
FAIL: test_convenience_registers_16bit_with_process_attach (TestRegisters.RegisterCommandsTestCase.test_convenience_registers_16bit_with_process_attach)
    Test convenience registers after a 'process attach'.
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/packages/Python/lldbsuite/test/decorators.py", line 175, in wrapper
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/packages/Python/lldbsuite/test/decorators.py", line 175, in wrapper
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/test/API/commands/register/register_command/TestRegisters.py", line 147, in test_convenience_registers_16bit_with_process_attach
    self.convenience_registers_with_process_attach(test_16bit_regs=True)
  File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/test/API/commands/register/register_command/TestRegisters.py", line 529, in convenience_registers_with_process_attach
    self.runCmd("process attach -p %d" % pid)
  File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/packages/Python/lldbsuite/test/lldbtest.py", line 1132, in runCmd
    self.assertTrue(self.res.Succeeded(), msg + output)
AssertionError: False is not true : Command 'process attach -p 1652480' did not return successfully
Error output:
error: attach failed: The current value of ptrace_scope is 1, which can cause ptrace to fail to attach to a running process. To fix this, run:
	sudo sysctl -w kernel.yama.ptrace_scope=0
For more information, see: https://www.kernel.org/doc/Documentation/security/Yama.txt.

Config=x86_64-/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang
----------------------------------------------------------------------
Ran 15 tests in 2.742s

FAILED (failures=1, skipped=3)

--

```
</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/206876