[llvm] [llvm-dwarfdump][LineCov 3/3] Add IR analysis for variable coverage (PR #207974)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-ppc64le-linux-test-suite` running on `ppc64le-clang-test-suite` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/95/builds/21523

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

```
Step 6 (test-build-unified-tree-check-all) failure: 1200 seconds without output running [b'ninja', b'check-all'], attempting to kill
...
PASS: Clang :: Driver/riscv-arch.c (112658 of 112669)
PASS: LLVM :: tools/llvm-readobj/ELF/AMDGPU/elf-headers.test (112659 of 112669)
PASS: LLVM :: CodeGen/AMDGPU/directive-amdgcn-target.ll (112660 of 112669)
PASS: Clang :: Driver/linux-ld.c (112661 of 112669)
PASS: LLVM :: CodeGen/RISCV/attributes.ll (112662 of 112669)
PASS: Clang :: OpenMP/target_update_codegen.cpp (112663 of 112669)
PASS: Clang :: OpenMP/target_defaultmap_codegen_01.cpp (112664 of 112669)
PASS: Clang :: Preprocessor/riscv-target-features.c (112665 of 112669)
PASS: ScudoStandalone-Unit :: ./ScudoUnitTest-powerpc64le-Test/102/387 (112666 of 112669)
PASS: ScudoStandalone-Unit :: ./ScudoUnitTest-powerpc64le-Test/117/387 (112667 of 112669)
command timed out: 1200 seconds without output running [b'ninja', b'check-all'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=16547.522629

```

</details>

https://github.com/llvm/llvm-project/pull/207974