[llvm] [LV]Split store-load forward distance analysis from other checks, NFC (PR #121156)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clangd-ubuntu-tsan` running on `clangd-ubuntu-clang` while building `llvm` at step 6 "test-build-clangd-clangd-index-server-clangd-in...".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/134/builds/16026

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

```
Step 6 (test-build-clangd-clangd-index-server-clangd-in...) failure: test (failure)
******************** TEST 'Clangd :: remote-index/log-prefix.test' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
rm -rf /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/remote-index/Output/log-prefix.test.tmp # RUN: at line 1
+ rm -rf /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/remote-index/Output/log-prefix.test.tmp
clangd-indexer /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/llvm-project/clang-tools-extra/clangd/test/remote-index/Inputs/Source.cpp > /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/remote-index/Output/log-prefix.test.tmp.idx # RUN: at line 2
+ clangd-indexer /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/llvm-project/clang-tools-extra/clangd/test/remote-index/Inputs/Source.cpp
Error while trying to load a compilation database:
Could not auto-detect compilation database for file "/vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/llvm-project/clang-tools-extra/clangd/test/remote-index/Inputs/Source.cpp"
No compilation database found in /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/llvm-project/clang-tools-extra/clangd/test/remote-index/Inputs or any parent directory
fixed-compilation-database: Error while opening fixed database: No such file or directory
json-compilation-database: Error while opening JSON database: No such file or directory
Running without flags.
"/usr/bin/python3.8" /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/llvm-project/clang-tools-extra/clangd/test/remote-index/pipeline_helper.py --input-file-name=/vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/llvm-project/clang-tools-extra/clangd/test/remote-index/log-prefix.test --server-arg=--log=verbose --server-arg=-log-prefix=test-prefix --server-log=/vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/remote-index/Output/log-prefix.test.tmp.log --project-root=/vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/llvm-project/clang-tools-extra/clangd/test/remote-index --index-file=/vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/remote-index/Output/log-prefix.test.tmp.idx > /dev/null # RUN: at line 3
+ /usr/bin/python3.8 /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/llvm-project/clang-tools-extra/clangd/test/remote-index/pipeline_helper.py --input-file-name=/vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/llvm-project/clang-tools-extra/clangd/test/remote-index/log-prefix.test --server-arg=--log=verbose --server-arg=-log-prefix=test-prefix --server-log=/vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/remote-index/Output/log-prefix.test.tmp.log --project-root=/vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/llvm-project/clang-tools-extra/clangd/test/remote-index --index-file=/vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/remote-index/Output/log-prefix.test.tmp.idx
I[11:35:55.911] clangd version 21.0.0git (https://github.com/llvm/llvm-project.git 78777a204ad9a3f17f04f90040f88855f47aa50f)
I[11:35:55.911] Features: linux+debug+tsan+grpc
I[11:35:55.911] PID: 134506
I[11:35:55.911] Working directory: /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/tools/clang/tools/extra/clangd/test/remote-index
I[11:35:55.911] argv[0]: clangd
I[11:35:55.911] argv[1]: --remote-index-address=localhost:54141
I[11:35:55.911] argv[2]: --project-root=/vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/llvm-project/clang-tools-extra/clangd/test/remote-index
I[11:35:55.911] argv[3]: --lit-test
I[11:35:55.911] argv[4]: --sync
I[11:35:55.911] Connecting to remote index at localhost:54141
I[11:35:55.911] Starting LSP over stdin/stdout
V[11:35:55.911] <<< {
  "id": 0,
  "jsonrpc": "2.0",
  "method": "initialize",
  "params": {
    "capabilities": {},
    "processId": 123,
    "rootPath": "clangd",
    "trace": "off"
  }
}

I[11:35:55.911] <-- initialize(0)
I[11:35:55.913] --> reply:initialize(0) 1 ms
V[11:35:55.913] >>> {
  "id": 0,
  "jsonrpc": "2.0",
  "result": {
    "capabilities": {
      "astProvider": true,
      "callHierarchyProvider": true,
      "clangdInlayHintsProvider": true,
...

```

</details>

https://github.com/llvm/llvm-project/pull/121156