[llvm] [CodeGen] Use MCRegister for CCState::AllocateReg and CCValAssign::getReg. NFC (PR #106032)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `libc-x86_64-debian-fullbuild-dbg` running on `libc-x86_64-debian-fullbuild` while building `llvm` at step 4 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/179/builds/4991

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

```
Step 4 (annotate) failure: 'python ../llvm-zorg/zorg/buildbot/builders/annotated/libc-linux.py ...' (failure)
...
[ RUN      ] LlvmLibcVASPrintfTest.PercentConv
[       OK ] LlvmLibcVASPrintfTest.PercentConv (8 us)
[ RUN      ] LlvmLibcVASPrintfTest.CharConv
[       OK ] LlvmLibcVASPrintfTest.CharConv (8 us)
[ RUN      ] LlvmLibcVASPrintfTest.LargeStringNoConv
[       OK ] LlvmLibcVASPrintfTest.LargeStringNoConv (26 us)
[ RUN      ] LlvmLibcVASPrintfTest.ManyReAlloc
[       OK ] LlvmLibcVASPrintfTest.ManyReAlloc (14 us)
Ran 5 tests.  PASS: 5  FAIL: 0
[817/1074] Running unit test libc.test.src.stdio.fscanf_test.__unit__
FAILED: projects/libc/test/src/stdio/CMakeFiles/libc.test.src.stdio.fscanf_test.__unit__ /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-fullbuild-dbg/build/projects/libc/test/src/stdio/CMakeFiles/libc.test.src.stdio.fscanf_test.__unit__ 
cd /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-fullbuild-dbg/build/projects/libc/test/src/stdio && /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-fullbuild-dbg/build/projects/libc/test/src/stdio/libc.test.src.stdio.fscanf_test.__unit__.__build__
[==========] Running 1 test from 1 test suite.
[ RUN      ] LlvmLibcFScanfTest.WriteToFile
/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-fullbuild-dbg/llvm-project/libc/test/src/stdio/fscanf_test.cpp:73: FAILURE
      Expected: read
      Which is: 0
To be equal to: 1
      Which is: 1
[  FAILED  ] LlvmLibcFScanfTest.WriteToFile
Ran 1 tests.  PASS: 0  FAIL: 1
[818/1074] Running unit test libc.test.src.stdio.vfscanf_test.__unit__
[==========] Running 1 test from 1 test suite.
[ RUN      ] LlvmLibcFScanfTest.WriteToFile
[       OK ] LlvmLibcFScanfTest.WriteToFile (241 us)
Ran 1 tests.  PASS: 1  FAIL: 0
[819/1074] Running unit test libc.test.src.stdio.sscanf_test.__unit__
[==========] Running 15 tests from 1 test suite.
[ RUN      ] LlvmLibcSScanfTest.SimpleStringConv
[       OK ] LlvmLibcSScanfTest.SimpleStringConv (20 us)
[ RUN      ] LlvmLibcSScanfTest.IntConvSimple
[       OK ] LlvmLibcSScanfTest.IntConvSimple (24 us)
[ RUN      ] LlvmLibcSScanfTest.IntConvLengthModifier
[       OK ] LlvmLibcSScanfTest.IntConvLengthModifier (10 us)
[ RUN      ] LlvmLibcSScanfTest.IntConvBaseSelection
[       OK ] LlvmLibcSScanfTest.IntConvBaseSelection (4 us)
[ RUN      ] LlvmLibcSScanfTest.IntConvMaxLengthTests
[       OK ] LlvmLibcSScanfTest.IntConvMaxLengthTests (8 us)
[ RUN      ] LlvmLibcSScanfTest.IntConvNoWriteTests
[       OK ] LlvmLibcSScanfTest.IntConvNoWriteTests (3 us)
[ RUN      ] LlvmLibcSScanfTest.FloatConvSimple
[       OK ] LlvmLibcSScanfTest.FloatConvSimple (19 us)
[ RUN      ] LlvmLibcSScanfTest.FloatConvLengthModifier
[       OK ] LlvmLibcSScanfTest.FloatConvLengthModifier (1 ms)
[ RUN      ] LlvmLibcSScanfTest.FloatConvLongNumber
[       OK ] LlvmLibcSScanfTest.FloatConvLongNumber (39 us)
[ RUN      ] LlvmLibcSScanfTest.FloatConvComplexParsing
[       OK ] LlvmLibcSScanfTest.FloatConvComplexParsing (13 us)
[ RUN      ] LlvmLibcSScanfTest.FloatConvMaxWidth
Step 8 (libc-unit-tests) failure: libc-unit-tests (failure)
...
[ RUN      ] LlvmLibcVASPrintfTest.PercentConv
[       OK ] LlvmLibcVASPrintfTest.PercentConv (8 us)
[ RUN      ] LlvmLibcVASPrintfTest.CharConv
[       OK ] LlvmLibcVASPrintfTest.CharConv (8 us)
[ RUN      ] LlvmLibcVASPrintfTest.LargeStringNoConv
[       OK ] LlvmLibcVASPrintfTest.LargeStringNoConv (26 us)
[ RUN      ] LlvmLibcVASPrintfTest.ManyReAlloc
[       OK ] LlvmLibcVASPrintfTest.ManyReAlloc (14 us)
Ran 5 tests.  PASS: 5  FAIL: 0
[817/1074] Running unit test libc.test.src.stdio.fscanf_test.__unit__
FAILED: projects/libc/test/src/stdio/CMakeFiles/libc.test.src.stdio.fscanf_test.__unit__ /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-fullbuild-dbg/build/projects/libc/test/src/stdio/CMakeFiles/libc.test.src.stdio.fscanf_test.__unit__ 
cd /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-fullbuild-dbg/build/projects/libc/test/src/stdio && /home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-fullbuild-dbg/build/projects/libc/test/src/stdio/libc.test.src.stdio.fscanf_test.__unit__.__build__
[==========] Running 1 test from 1 test suite.
[ RUN      ] LlvmLibcFScanfTest.WriteToFile
/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-fullbuild-dbg/llvm-project/libc/test/src/stdio/fscanf_test.cpp:73: FAILURE
      Expected: read
      Which is: 0
To be equal to: 1
      Which is: 1
[  FAILED  ] LlvmLibcFScanfTest.WriteToFile
Ran 1 tests.  PASS: 0  FAIL: 1
[818/1074] Running unit test libc.test.src.stdio.vfscanf_test.__unit__
[==========] Running 1 test from 1 test suite.
[ RUN      ] LlvmLibcFScanfTest.WriteToFile
[       OK ] LlvmLibcFScanfTest.WriteToFile (241 us)
Ran 1 tests.  PASS: 1  FAIL: 0
[819/1074] Running unit test libc.test.src.stdio.sscanf_test.__unit__
[==========] Running 15 tests from 1 test suite.
[ RUN      ] LlvmLibcSScanfTest.SimpleStringConv
[       OK ] LlvmLibcSScanfTest.SimpleStringConv (20 us)
[ RUN      ] LlvmLibcSScanfTest.IntConvSimple
[       OK ] LlvmLibcSScanfTest.IntConvSimple (24 us)
[ RUN      ] LlvmLibcSScanfTest.IntConvLengthModifier
[       OK ] LlvmLibcSScanfTest.IntConvLengthModifier (10 us)
[ RUN      ] LlvmLibcSScanfTest.IntConvBaseSelection
[       OK ] LlvmLibcSScanfTest.IntConvBaseSelection (4 us)
[ RUN      ] LlvmLibcSScanfTest.IntConvMaxLengthTests
[       OK ] LlvmLibcSScanfTest.IntConvMaxLengthTests (8 us)
[ RUN      ] LlvmLibcSScanfTest.IntConvNoWriteTests
[       OK ] LlvmLibcSScanfTest.IntConvNoWriteTests (3 us)
[ RUN      ] LlvmLibcSScanfTest.FloatConvSimple
[       OK ] LlvmLibcSScanfTest.FloatConvSimple (19 us)
[ RUN      ] LlvmLibcSScanfTest.FloatConvLengthModifier
[       OK ] LlvmLibcSScanfTest.FloatConvLengthModifier (1 ms)
[ RUN      ] LlvmLibcSScanfTest.FloatConvLongNumber
[       OK ] LlvmLibcSScanfTest.FloatConvLongNumber (39 us)
[ RUN      ] LlvmLibcSScanfTest.FloatConvComplexParsing
[       OK ] LlvmLibcSScanfTest.FloatConvComplexParsing (13 us)
[ RUN      ] LlvmLibcSScanfTest.FloatConvMaxWidth

```

</details>

https://github.com/llvm/llvm-project/pull/106032