llvm-wrapper cleanup

[klensy]

Removes dead code and replaces few LLVMRust* with LLVM* c api, see commits with whitespace collapsed. Partially intersects with #136632.

See https://github.com/llvm/llvm-project/blob/release/19.x/llvm/lib/IR/DebugInfo.cpp

[rustbot]

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[rust-log-analyzer]

The job pr-check-1 failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

  --- stdout
  cargo:rerun-if-changed=imp
  Creating /checkout/obj/build/x86_64-unknown-linux-gnu/stage1-tools/i686-pc-windows-gnu/release/build/proc-macro-test-d7ad627b63190638/out/proc-macro-test-imp-staging
  Creating /checkout/obj/build/x86_64-unknown-linux-gnu/stage1-tools/i686-pc-windows-gnu/release/build/proc-macro-test-d7ad627b63190638/out/proc-macro-test-imp-staging/src
  Copying /checkout/src/tools/rust-analyzer/crates/proc-macro-srv/proc-macro-test/imp/Cargo.toml to /checkout/obj/build/x86_64-unknown-linux-gnu/stage1-tools/i686-pc-windows-gnu/release/build/proc-macro-test-d7ad627b63190638/out/proc-macro-test-imp-staging/Cargo.toml
  Copying /checkout/src/tools/rust-analyzer/crates/proc-macro-srv/proc-macro-test/imp/build.rs to /checkout/obj/build/x86_64-unknown-linux-gnu/stage1-tools/i686-pc-windows-gnu/release/build/proc-macro-test-d7ad627b63190638/out/proc-macro-test-imp-staging/build.rs
  Copying /checkout/src/tools/rust-analyzer/crates/proc-macro-srv/proc-macro-test/imp/src/lib.rs to /checkout/obj/build/x86_64-unknown-linux-gnu/stage1-tools/i686-pc-windows-gnu/release/build/proc-macro-test-d7ad627b63190638/out/proc-macro-test-imp-staging/src/lib.rs
  Running cd "/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-tools/i686-pc-windows-gnu/release/build/proc-macro-test-d7ad627b63190638/out/proc-macro-test-imp-staging" && "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "build" "-p" "proc-macro-test-impl" "--message-format" "json" "--target-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-tools/i686-pc-windows-gnu/release/build/proc-macro-test-d7ad627b63190638/out/target" "--target" "i686-pc-windows-gnu"
  proc-macro-test-impl failed to build
  ============ stdout ============
  {"reason":"build-finished","success":false}

  ============ stderr ============
     Compiling proc-macro-test-impl v0.0.0 (/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-tools/i686-pc-windows-gnu/release/build/proc-macro-test-d7ad627b63190638/out/proc-macro-test-imp-staging)
  rustc: /checkout/src/llvm-project/llvm/include/llvm/Support/Casting.h:578: decltype(auto) llvm::cast(From *) [To = llvm::DIType, From = llvm::Metadata]: Assertion `isa<To>(Val) && "cast<Ty>() argument of incompatible type!"' failed.
  [RUSTC-TIMING] build_script_build test:false 0.578
  rustc exited with signal: 6 (SIGABRT) (core dumped)
  error: could not compile `proc-macro-test-impl` (build script)

  Caused by:
    process didn't exit successfully: `/checkout/obj/build/bootstrap/debug/rustc /checkout/obj/build/bootstrap/debug/rustc --crate-name build_script_build --edition=2024 build.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=777358d0d763388b -C extra-filename=-c96c0384969dc544 --out-dir /checkout/obj/build/x86_64-unknown-linux-gnu/stage1-tools/i686-pc-windows-gnu/release/build/proc-macro-test-d7ad627b63190638/out/target/debug/build/proc-macro-test-impl-c96c0384969dc544 -L dependency=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-tools/i686-pc-windows-gnu/release/build/proc-macro-test-d7ad627b63190638/out/target/debug/deps` (exit status: 254)


  --- stderr

  thread 'main' (30119) panicked at src/tools/rust-analyzer/crates/proc-macro-srv/proc-macro-test/build.rs:93:9:

[klensy]

@rustbot author

[rustbot]

Reminder, once the PR becomes ready for a review, use @rustbot ready.

[BoxyUwU]

r? compiler