[llvm] [DAG] visitEXTRACT_SUBVECTOR - accumulate SimplifyDemandedVectorElts demanded elts across all EXTRACT_SUBVECTOR uses (REAPPLIED) (PR #133401)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `bolt-x86_64-ubuntu-nfc` running on `bolt-worker` while building `llvm` at step 9 "test-build-bolt-check-large-bolt".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/92/builds/16293

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

```
Step 9 (test-build-bolt-check-large-bolt) failure: 1200 seconds without output running [b'ninja', b'check-large-bolt'], attempting to kill
...
PASS: bolt-tests :: X86/exceptions-split-strip.test (6 of 16)
PASS: bolt-tests :: X86/openssl.test (7 of 16)
XFAIL: bolt-tests :: AArch64/bzip2-nolbr.test (8 of 16)
PASS: bolt-tests :: X86/libmysqlclient-entry-cold.test (9 of 16)
PASS: bolt-tests :: AArch64/bzip2.test (10 of 16)
PASS: bolt-tests :: X86/cond-tail.test (11 of 16)
PASS: bolt-tests :: X86/debugTypesBug.test (12 of 16)
PASS: bolt-tests :: X86/R_X86_64_64.pic.test (13 of 16)
PASS: bolt-tests :: X86/clang.test (14 of 16)
PASS: bolt-tests :: X86/clang7-pic.test (15 of 16)
command timed out: 1200 seconds without output running [b'ninja', b'check-large-bolt'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=1266.456084

```

</details>

https://github.com/llvm/llvm-project/pull/133401