[clang] [clang][bytecode] Do a full CheckLoad in builtin_memcmp() (PR #181337)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `lldb-aarch64-windows` running on `linaro-armv8-windows-msvc-05` while building `clang` at step 6 "test".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/141/builds/15381

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

```
Step 6 (test) failure: build (failure)
...
PASS: lldb-api :: functionalities/alias/TestBtAliasRepeat.py (303 of 2445)
PASS: lldb-api :: functionalities/alias/TestPAlias.py (304 of 2445)
PASS: lldb-api :: functionalities/ambigous_commands/TestAmbiguousCommands.py (305 of 2445)
UNSUPPORTED: lldb-api :: functionalities/asan/TestMemoryHistory.py (306 of 2445)
UNSUPPORTED: lldb-api :: functionalities/asan/TestReportData.py (307 of 2445)
UNSUPPORTED: lldb-api :: functionalities/avoids-fd-leak/TestFdLeak.py (308 of 2445)
PASS: lldb-api :: functionalities/archives/TestBSDArchives.py (309 of 2445)
PASS: lldb-api :: functionalities/backticks/TestBackticksWithoutATarget.py (310 of 2445)
PASS: lldb-api :: functionalities/breakpoint/address_breakpoints/TestAddressBreakpoints.py (311 of 2445)
PASS: lldb-api :: functionalities/breakpoint/address_breakpoints/TestBadAddressBreakpoints.py (312 of 2445)
FAIL: lldb-api :: functionalities/breakpoint/auto_continue/TestBreakpointAutoContinue.py (313 of 2445)
******************** TEST 'lldb-api :: functionalities/breakpoint/auto_continue/TestBreakpointAutoContinue.py' FAILED ********************
Script:
--
C:/Users/tcwg/scoop/apps/python/current/python.exe C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/llvm-project/lldb\test\API\dotest.py -u CXXFLAGS -u CFLAGS --env LLVM_LIBS_DIR=C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/./lib --env LLVM_INCLUDE_DIR=C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/include --env LLVM_TOOLS_DIR=C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/./bin --arch aarch64 --build-dir C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/lldb-test-build.noindex --lldb-module-cache-dir C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/lldb-test-build.noindex/module-cache-lldb\lldb-api --clang-module-cache-dir C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/lldb-test-build.noindex/module-cache-clang\lldb-api --executable C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/./bin/lldb.exe --compiler C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/./bin/clang.exe --dsymutil C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/./bin/dsymutil.exe --make C:/Users/tcwg/scoop/shims/make.exe --llvm-tools-dir C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/./bin --lldb-obj-root C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/tools/lldb --lldb-libs-dir C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/./lib --cmake-build-type Release --skip-category=watchpoint C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\llvm-project\lldb\test\API\functionalities\breakpoint\auto_continue -p TestBreakpointAutoContinue.py
--
Exit Code: 1

Command Output (stdout):
--
lldb version 23.0.0git (https://github.com/llvm/llvm-project.git revision c2b69b1a173704e246f7501f8e87268ff6afcd01)
  clang revision c2b69b1a173704e246f7501f8e87268ff6afcd01
  llvm revision c2b69b1a173704e246f7501f8e87268ff6afcd01
(lldb)  break modify --auto-continue 0 BKPT
Set a breakpoint here: 0 with: 0.

Set a breakpoint here: 1 with: 0.

Set another breakpoint here.

Set a breakpoint here: 0 with: 0.

Set a breakpoint here: 1 with: 0.

Set another breakpoint here.

Skipping the following test categories: watchpoint, libc++, libstdcxx, dwo, dsym, gmodules, debugserver, objc, fork, pexpect


--
Command Output (stderr):
--
PASS: LLDB (C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\clang.exe-aarch64) :: test_auto_continue_on_location (TestBreakpointAutoContinue.BreakpointAutoContinue.test_auto_continue_on_location)

FAIL: LLDB (C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\clang.exe-aarch64) :: test_auto_continue_with_command (TestBreakpointAutoContinue.BreakpointAutoContinue.test_auto_continue_with_command)

PASS: LLDB (C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\clang.exe-aarch64) :: test_breakpoint_auto_continue (TestBreakpointAutoContinue.BreakpointAutoContinue.test_breakpoint_auto_continue)

======================================================================

```

</details>

https://github.com/llvm/llvm-project/pull/181337