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Apply PGO to libstd on CI #97038

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Apply PGO to libstd on CI #97038

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1ee57ce
Use PGO for libstd
Kobzol May 17, 2022
6e0967f
Use stdlib PGO in stage 2
Kobzol Jul 7, 2022
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Use stdlib PGO in stage 2
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@Kobzol
Kobzol committed Jul 7, 2022
commit 6e0967f40a9dfeca8fbf14aed46904969b61d512
6 changes: 4 additions & 2 deletions src/bootstrap/compile.rs
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Expand Up @@ -115,7 +115,8 @@ impl Step for Std {
}

let is_collecting = if let Some(path) = &builder.config.libstd_profile_generate {
if compiler.stage == 1 {
if compiler.stage == 2 {
eprintln!("STD STAGE 2 GENERATE");
cargo.env("RUST_LIBSTD_PGO", "1");
cargo.rustflag(&format!("-Cprofile-generate={}", path));
// Apparently necessary to avoid overflowing the counters during
Expand All @@ -126,7 +127,8 @@ impl Step for Std {
false
}
} else if let Some(path) = &builder.config.libstd_profile_use {
if compiler.stage == 1 {
if compiler.stage == 2 {
eprintln!("STD STAGE 2 USE");
cargo.rustflag(&format!("-Cprofile-use={}", path));
cargo.rustflag("-Cllvm-args=-pgo-warn-missing-function");
true
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