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// This test checks the -Zremark-dir flag, which writes LLVM
// optimization remarks to the YAML format. When using PGO (Profile
// Guided Optimization), the Hotness attribute should be included in
// the output remark files.
// See https://github.com/rust-lang/rust/pull/114439
//@ needs-profiler-runtime
//@ ignore-cross-compile
use run_make_support::{
has_extension, has_prefix, invalid_utf8_contains, llvm_profdata, run, rustc, shallow_find_files,
};
fn main() {
rustc().profile_generate("profdata").opt().input("foo.rs").output("foo").run();
run("foo");
// The profdata filename is a long sequence of numbers, fetch it by prefix and extension
// to keep the test working even if the filename changes.
let profdata_files = shallow_find_files("profdata", |path| {
has_prefix(path, "default") && has_extension(path, "profraw")
});
let profdata_file = profdata_files.get(0).unwrap();
llvm_profdata().merge().output("merged.profdata").input(profdata_file).run();
rustc()
.profile_use("merged.profdata")
.opt()
.input("foo.rs")
.arg("-Cremark=all")
.arg("-Zremark-dir=profiles")
.run();
// Check that PGO hotness is included in the remark files
let remark_files = shallow_find_files("profiles", |path| {
has_prefix(path, "foo") && has_extension(path, "yaml")
});
assert!(!remark_files.is_empty());
for file in remark_files {
if !file.to_str().unwrap().contains("codegen") {
invalid_utf8_contains(file, "Hotness")
};
}
}
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