[llvm] Add support for fixed-point types (PR #129596)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `lldb-aarch64-ubuntu` running on `linaro-lldb-aarch64-ubuntu` while building `llvm` at step 6 "test".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/59/builds/15190

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

```
Step 6 (test) failure: build (failure)
...
PASS: lldb-api :: lang/cpp/llvm-style/TestLLVMStyle.py (817 of 2110)
PASS: lldb-api :: lang/cpp/incomplete-types/TestCppIncompleteTypes.py (818 of 2110)
PASS: lldb-api :: lang/cpp/multiple-inheritance/TestCppMultipleInheritance.py (819 of 2110)
PASS: lldb-api :: lang/cpp/member-and-local-vars-with-same-name/TestMembersAndLocalsWithSameName.py (820 of 2110)
PASS: lldb-api :: lang/cpp/limit-debug-info/TestWithLimitDebugInfo.py (821 of 2110)
PASS: lldb-api :: lang/cpp/namespace_conflicts/TestNamespaceConflicts.py (822 of 2110)
PASS: lldb-api :: lang/cpp/non-type-template-param/TestCppNonTypeTemplateParam.py (823 of 2110)
PASS: lldb-api :: lang/cpp/nested-class-other-compilation-unit/TestNestedClassWithParentInAnotherCU.py (824 of 2110)
PASS: lldb-api :: iohandler/autosuggestion/TestAutosuggestion.py (825 of 2110)
PASS: lldb-api :: lang/cpp/nested-template/TestNestedTemplate.py (826 of 2110)
FAIL: lldb-api :: lang/cpp/namespace_definitions/TestNamespaceDefinitions.py (827 of 2110)
******************** TEST 'lldb-api :: lang/cpp/namespace_definitions/TestNamespaceDefinitions.py' FAILED ********************
Script:
--
/usr/bin/python3.10 /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/llvm-project/lldb/test/API/dotest.py -u CXXFLAGS -u CFLAGS --env LLVM_LIBS_DIR=/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/./lib --env LLVM_INCLUDE_DIR=/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/include --env LLVM_TOOLS_DIR=/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/./bin --arch aarch64 --build-dir /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/lldb-test-build.noindex --lldb-module-cache-dir /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/lldb-test-build.noindex/module-cache-lldb/lldb-api --clang-module-cache-dir /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/lldb-test-build.noindex/module-cache-clang/lldb-api --executable /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/./bin/lldb --compiler /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/./bin/clang --dsymutil /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/./bin/dsymutil --make /usr/bin/gmake --llvm-tools-dir /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/./bin --lldb-obj-root /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/tools/lldb --lldb-libs-dir /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/./lib /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/llvm-project/lldb/test/API/lang/cpp/namespace_definitions -p TestNamespaceDefinitions.py
--
Exit Code: -11

Command Output (stdout):
--
lldb version 21.0.0git (https://github.com/llvm/llvm-project.git revision 68947342b75cc71f3ac9041d11db086d8d074336)
  clang revision 68947342b75cc71f3ac9041d11db086d8d074336
  llvm revision 68947342b75cc71f3ac9041d11db086d8d074336
Skipping the following test categories: ['libc++', 'dsym', 'gmodules', 'debugserver', 'objc']

--
Command Output (stderr):
--
UNSUPPORTED: LLDB (/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/bin/clang-aarch64) :: test_expr_dsym (TestNamespaceDefinitions.NamespaceDefinitionsTestCase) (test case does not fall in any category of interest for this run) 
PASS: LLDB (/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/bin/clang-aarch64) :: test_expr_dwarf (TestNamespaceDefinitions.NamespaceDefinitionsTestCase)
PASS: LLDB (/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/bin/clang-aarch64) :: test_expr_dwo (TestNamespaceDefinitions.NamespaceDefinitionsTestCase)
----------------------------------------------------------------------
Ran 3 tests in 0.993s

OK (skipped=1)

--

********************
PASS: lldb-api :: lang/cpp/no_unique_address/TestNoUniqueAddress.py (828 of 2110)
UNSUPPORTED: lldb-api :: lang/cpp/odr-handling-with-dylib/TestOdrHandlingWithDylib.py (829 of 2110)
PASS: lldb-api :: lang/cpp/offsetof/TestOffsetofCpp.py (830 of 2110)
PASS: lldb-api :: lang/cpp/pointer_to_member_type_depending_on_parent_size/TestPointerToMemberTypeDependingOnParentSize.py (831 of 2110)
PASS: lldb-api :: lang/cpp/nsimport/TestCppNsImport.py (832 of 2110)
PASS: lldb-api :: lang/cpp/operator-overload/TestOperatorOverload.py (833 of 2110)
PASS: lldb-api :: lang/cpp/namespace/TestNamespace.py (834 of 2110)
PASS: lldb-api :: lang/cpp/overloaded-functions/TestOverloadedFunctions.py (835 of 2110)
XFAIL: lldb-api :: lang/cpp/reference-to-outer-type/TestCppReferenceToOuterClass.py (836 of 2110)
PASS: lldb-api :: lang/cpp/printf/TestPrintf.py (837 of 2110)

```

</details>

https://github.com/llvm/llvm-project/pull/129596