64 lines
2.3 KiB
Bash
Executable File
64 lines
2.3 KiB
Bash
Executable File
#!/bin/bash
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set -euxo pipefail
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rm -rf /tmp/rustc-pgo
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python2.7 ../x.py build --target=$PGO_HOST --host=$PGO_HOST \
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--stage 2 library/std --rust-profile-generate=/tmp/rustc-pgo
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RUSTC_BOOTSTRAP=1 ./build/$PGO_HOST/stage2/bin/rustc --edition=2018 \
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--crate-type=lib ../library/core/src/lib.rs
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# Download and build a single-file stress test benchmark on perf.rust-lang.org.
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function pgo_perf_benchmark {
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local PERF=e095f5021bf01cf3800f50b3a9f14a9683eb3e4e
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local github_prefix=https://raw.githubusercontent.com/rust-lang/rustc-perf/$PERF
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local name=$1
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curl -o /tmp/$name.rs $github_prefix/collector/benchmarks/$name/src/lib.rs
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RUSTC_BOOTSTRAP=1 ./build/$PGO_HOST/stage2/bin/rustc --edition=2018 \
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--crate-type=lib /tmp/$name.rs
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}
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pgo_perf_benchmark externs
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pgo_perf_benchmark ctfe-stress-4
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cp -pri ../src/tools/cargo /tmp/cargo
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# The Cargo repository does not have a Cargo.lock in it, as it relies on the
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# lockfile already present in the rust-lang/rust monorepo. This decision breaks
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# down when Cargo is built outside the monorepo though (like in this case),
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# resulting in a build without any dependency locking.
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#
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# To ensure Cargo is built with locked dependencies even during PGO profiling
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# the following command copies the monorepo's lockfile into the Cargo temporary
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# directory. Cargo will *not* keep that lockfile intact, as it will remove all
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# the dependencies Cargo itself doesn't rely on. Still, it will prevent
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# building Cargo with arbitrary dependency versions.
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#
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# See #81378 for the bug that prompted adding this.
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cp -p ../Cargo.lock /tmp/cargo
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# Build cargo (with some flags)
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function pgo_cargo {
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RUSTC=./build/$PGO_HOST/stage2/bin/rustc \
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./build/$PGO_HOST/stage0/bin/cargo $@ \
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--manifest-path /tmp/cargo/Cargo.toml
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}
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# Build a couple different variants of Cargo
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CARGO_INCREMENTAL=1 pgo_cargo check
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echo 'pub fn barbarbar() {}' >> /tmp/cargo/src/cargo/lib.rs
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CARGO_INCREMENTAL=1 pgo_cargo check
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touch /tmp/cargo/src/cargo/lib.rs
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CARGO_INCREMENTAL=1 pgo_cargo check
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pgo_cargo build --release
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# Merge the profile data we gathered
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./build/$PGO_HOST/llvm/bin/llvm-profdata \
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merge -o /tmp/rustc-pgo.profdata /tmp/rustc-pgo
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# This produces the actual final set of artifacts.
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$@ --rust-profile-use=/tmp/rustc-pgo.profdata
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