[llvm] [GlobalISel] Use replaceRegOrBuildCopy when legalizer-combining anyext(undef). (PR #119721)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-aarch64-darwin` running on `doug-worker-4` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/190/builds/11292

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

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
...
PASS: lld :: MachO/arm64-objc-stubs-dyn.s (79802 of 80345)
PASS: lld :: MachO/arm64-objc-stubs-fix.s (79803 of 80345)
PASS: lld :: MachO/arm64-objc-stubs.s (79804 of 80345)
PASS: lld :: MachO/arm64-reloc-got-load.s (79805 of 80345)
PASS: lld :: MachO/arm64-reloc-pointer-to-got.s (79806 of 80345)
PASS: lld :: MachO/arm64-reloc-tlv-load.s (79807 of 80345)
PASS: lld :: MachO/arm64-relocs.s (79808 of 80345)
PASS: lld :: MachO/arm64-stubs.s (79809 of 80345)
PASS: lld :: ELF/aarch64-thunk-reuse2.s (79810 of 80345)
UNRESOLVED: lld :: MachO/arm64-thunk-starvation.s (79811 of 80345)
******************** TEST 'lld :: MachO/arm64-thunk-starvation.s' FAILED ********************
Exception during script execution:
Traceback (most recent call last):
  File "/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit/worker.py", line 76, in _execute_test_handle_errors
    result = test.config.test_format.execute(test, lit_config)
  File "/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit/formats/shtest.py", line 29, in execute
    return lit.TestRunner.executeShTest(
  File "/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit/TestRunner.py", line 2326, in executeShTest
    return _runShTest(test, litConfig, useExternalSh, script, tmpBase)
  File "/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit/TestRunner.py", line 2270, in _runShTest
    res = runOnce(execdir)
  File "/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit/TestRunner.py", line 2244, in runOnce
    res = executeScript(test, litConfig, tmpBase, scriptCopy, execdir)
  File "/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit/TestRunner.py", line 1210, in executeScript
    f = open(script, mode, **open_kwargs)
OSError: [Errno 28] No space left on device: '/Users/buildbot/buildbot-root/aarch64-darwin/build/tools/lld/test/MachO/Output/arm64-thunk-starvation.s.script'


********************
UNRESOLVED: lld :: MachO/arm64-thunk-visibility.s (79812 of 80345)
******************** TEST 'lld :: MachO/arm64-thunk-visibility.s' FAILED ********************
Exception during script execution:
Traceback (most recent call last):
  File "/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit/worker.py", line 76, in _execute_test_handle_errors
    result = test.config.test_format.execute(test, lit_config)
  File "/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit/formats/shtest.py", line 29, in execute
    return lit.TestRunner.executeShTest(
  File "/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit/TestRunner.py", line 2326, in executeShTest
    return _runShTest(test, litConfig, useExternalSh, script, tmpBase)
  File "/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit/TestRunner.py", line 2270, in _runShTest
    res = runOnce(execdir)
  File "/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit/TestRunner.py", line 2244, in runOnce
    res = executeScript(test, litConfig, tmpBase, scriptCopy, execdir)
  File "/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit/TestRunner.py", line 1210, in executeScript
    f = open(script, mode, **open_kwargs)
OSError: [Errno 28] No space left on device: '/Users/buildbot/buildbot-root/aarch64-darwin/build/tools/lld/test/MachO/Output/arm64-thunk-visibility.s.script'


********************

```

</details>

https://github.com/llvm/llvm-project/pull/119721