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// This test generates an instrumented binary - a program which
// will keep track of how many times it calls each function, a useful
// feature for optimization. Then, an argument (aaaaaaaaaaaa2bbbbbbbbbbbb2bbbbbbbbbbbbbbbbcc)
// is passed into the instrumented binary, which should react with a number of function calls
// fully known in advance. (For example, the letter 'a' results in calling f1())
// If the test passes, the expected function call count was added to the use-phase LLVM-IR.
// See https://github.com/rust-lang/rust/pull/66631
//@ needs-profiler-runtime
//@ ignore-cross-compile
use std::path::Path;
use run_make_support::{llvm_filecheck, llvm_profdata, rfs, run_with_args, rustc};
fn main() {
let path_prof_data_dir = Path::new("prof_data_dir");
let path_merged_profdata = path_prof_data_dir.join("merged.profdata");
rustc().input("opaque.rs").run();
rfs::create_dir_all(&path_prof_data_dir);
rustc()
.input("interesting.rs")
.profile_generate(&path_prof_data_dir)
.opt()
.codegen_units(1)
.run();
rustc().input("main.rs").profile_generate(&path_prof_data_dir).opt().run();
run_with_args("main", &["aaaaaaaaaaaa2bbbbbbbbbbbb2bbbbbbbbbbbbbbbbcc"]);
llvm_profdata().merge().output(&path_merged_profdata).input(path_prof_data_dir).run();
rustc()
.input("interesting.rs")
.profile_use(path_merged_profdata)
.opt()
.codegen_units(1)
.emit("llvm-ir")
.run();
llvm_filecheck()
.patterns("filecheck-patterns.txt")
.stdin_buf(rfs::read("interesting.ll"))
.run();
}
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