7 python3 ../x.py build --target=$PGO_HOST --host=$PGO_HOST \
8 --stage 2 library/std \
9 --rust-profile-generate=/tmp/rustc-pgo \
10 --llvm-profile-generate
12 # Profile libcore compilation in opt-level=0 and opt-level=3
13 RUSTC_BOOTSTRAP=1 ./build/$PGO_HOST/stage2/bin/rustc --edition=2018 \
14 --crate-type=lib ../library/core/src/lib.rs
15 RUSTC_BOOTSTRAP=1 ./build/$PGO_HOST/stage2/bin/rustc --edition=2018 \
16 --crate-type=lib -Copt-level=3 ../library/core/src/lib.rs
18 cp -r /tmp/rustc-perf ./
19 chown -R $(whoami): ./rustc-perf
22 # Build the collector ahead of time, which is needed to make sure the rustc-fake
23 # binary used by the collector is present.
24 RUSTC=/checkout/obj/build/$PGO_HOST/stage0/bin/rustc \
26 /checkout/obj/build/$PGO_HOST/stage0/bin/cargo build -p collector
28 # benchmark using profile_local with eprintln, which essentially just means
29 # don't actually benchmark -- just make sure we run rustc a bunch of times.
30 RUST_LOG=collector=debug \
31 RUSTC=/checkout/obj/build/$PGO_HOST/stage0/bin/rustc \
33 /checkout/obj/build/$PGO_HOST/stage0/bin/cargo run -p collector --bin collector -- \
36 /checkout/obj/build/$PGO_HOST/stage2/bin/rustc \
38 --builds Check,Debug,Opt \
39 --cargo /checkout/obj/build/$PGO_HOST/stage0/bin/cargo \
41 --include externs,ctfe-stress-4,inflate,cargo,token-stream-stress,match-stress-enum
45 # Merge the profile data we gathered
46 ./build/$PGO_HOST/llvm/bin/llvm-profdata \
47 merge -o /tmp/rustc-pgo.profdata /tmp/rustc-pgo
49 # Merge the profile data we gathered for LLVM
50 # Note that this uses the profdata from the clang we used to build LLVM,
51 # which likely has a different version than our in-tree clang.
52 /rustroot/bin/llvm-profdata \
53 merge -o /tmp/llvm-pgo.profdata ./build/$PGO_HOST/llvm/build/profiles
55 # Rustbuild currently doesn't support rebuilding LLVM when PGO options
56 # change (or any other llvm-related options); so just clear out the relevant
57 # directories ourselves.
58 rm -r ./build/$PGO_HOST/llvm ./build/$PGO_HOST/lld
60 # This produces the actual final set of artifacts.
62 --rust-profile-use=/tmp/rustc-pgo.profdata \
63 --llvm-profile-use=/tmp/llvm-pgo.profdata