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