use run_make_support::llvm::llvm_bin_dir;

use run_make_support::{cmd, env_var, llvm_filecheck, read_dir, rustc, source_root};

use std::ffi::OsStr;

fn main() {

// `-Ccodegen-units=16 -Copt-level=2` is used here to trigger thin LTO

// across codegen units to test deduplication of the named metadata

// (see `LLVMRustPrepareThinLTOImport` for details).

rustc()

.emit("link,obj")

.arg("-")

.arg("-Csave-temps")

.codegen_units(16)

.opt_level("2")

.target(&env_var("TARGET"))

.stdin("fn main(){}")

.run();

// `llvm-dis` is used here since `--emit=llvm-ir` does not emit LLVM IR

// for temporary outputs.

let mut files = Vec::new();

read_dir(".", |path| {

if path.is_file() && path.extension().is_some_and(|ext| ext == OsStr::new("bc")) {

files.push(path.to_path_buf());

}

});

cmd(llvm_bin_dir().join("llvm-dis")).args(&files).run();

// Check LLVM IR files (including temporary outputs) have `!llvm.ident`

// named metadata, reusing the related codegen test.

let llvm_ident_path = source_root().join("tests/codegen/llvm-ident.rs");

read_dir(".", |path| {

if path.is_file() && path.extension().is_some_and(|ext| ext == OsStr::new("ll")) {

llvm_filecheck().input_file(path).arg(&llvm_ident_path).run();

}

});