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