[clang] [clang][bytecode] Implement __builtin_{memchr,strchr,char_memchr} (PR #130420)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-aarch64-sve-vls-2stage` running on `linaro-g3-04` while building `clang` at step 12 "ninja check 2".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/4/builds/5499

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

```
Step 12 (ninja check 2) failure: stage 2 checked (failure)
******************** TEST 'LLVM-Unit :: Support/./SupportTests/47/88' FAILED ********************
Script(shard):
--
GTEST_OUTPUT=json:/home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/unittests/Support/./SupportTests-LLVM-Unit-3194266-47-88.json GTEST_SHUFFLE=0 GTEST_TOTAL_SHARDS=88 GTEST_SHARD_INDEX=47 /home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/unittests/Support/./SupportTests
--

Script:
--
/home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/stage2/unittests/Support/./SupportTests --gtest_filter=Caching.WriteAfterCommit
--
/home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/llvm/llvm/unittests/Support/Caching.cpp:110: Failure
Value of: llvm::detail::TakeError(CFS->commit())
Expected: succeeded
  Actual: failed  (Failed to rename temporary file /tmp/lit-tmp-met_qeqb/llvm_test_cache/LLVMTest-014090.tmp.o to /tmp/lit-tmp-met_qeqb/llvm_test_cache/llvmcache-foo: No such file or directory
)


/home/tcwg-buildbot/worker/clang-aarch64-sve-vls-2stage/llvm/llvm/unittests/Support/Caching.cpp:110
Value of: llvm::detail::TakeError(CFS->commit())
Expected: succeeded
  Actual: failed  (Failed to rename temporary file /tmp/lit-tmp-met_qeqb/llvm_test_cache/LLVMTest-014090.tmp.o to /tmp/lit-tmp-met_qeqb/llvm_test_cache/llvmcache-foo: No such file or directory
)



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


```

</details>

https://github.com/llvm/llvm-project/pull/130420