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| author | Jakub Beránek <berykubik@gmail.com> | 2022-07-17 17:37:10 +0200 |
|---|---|---|
| committer | Jakub Beránek <berykubik@gmail.com> | 2022-07-17 17:37:10 +0200 |
| commit | 97f6f958796bccf765a2e3038a40ecf5a8bb355a (patch) | |
| tree | 27a40a58068fdb8a373098cb28328d1bb5ece0f0 | |
| parent | 967a9c94b34bb8f394db03b1d205831eddf6f589 (diff) | |
| download | rust-97f6f958796bccf765a2e3038a40ecf5a8bb355a.tar.gz rust-97f6f958796bccf765a2e3038a40ecf5a8bb355a.zip | |
Use LLD linker for compiling rustc on Linux x64 and use ICF for binary size optimization
| -rw-r--r-- | src/bootstrap/compile.rs | 6 | ||||
| -rw-r--r-- | src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile | 3 | ||||
| -rwxr-xr-x | src/ci/pgo.sh | 4 |
3 files changed, 12 insertions, 1 deletions
diff --git a/src/bootstrap/compile.rs b/src/bootstrap/compile.rs index 3d678b2290d..aa7cda46bda 100644 --- a/src/bootstrap/compile.rs +++ b/src/bootstrap/compile.rs @@ -651,6 +651,12 @@ impl Step for Rustc { panic!("Cannot use and generate PGO profiles at the same time"); } + // With LLD, we can use ICF (identical code folding) to reduce the executable size + // of librustc_driver/rustc and to improve i-cache utilization. + if builder.config.use_lld { + cargo.rustflag("-Clink-args=-Wl,--icf=all"); + } + let is_collecting = if let Some(path) = &builder.config.rust_profile_generate { if compiler.stage == 1 { cargo.rustflag(&format!("-Cprofile-generate={}", path)); diff --git a/src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile b/src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile index ab6c888030e..f262bc3c7d8 100644 --- a/src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile +++ b/src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile @@ -122,7 +122,8 @@ ENV RUST_CONFIGURE_ARGS \ --set target.x86_64-unknown-linux-gnu.ranlib=/rustroot/bin/llvm-ranlib \ --set llvm.thin-lto=true \ --set llvm.ninja=false \ - --set rust.jemalloc + --set rust.jemalloc \ + --set rust.use-lld=true ENV SCRIPT ../src/ci/pgo.sh python3 ../x.py dist \ --host $HOSTS --target $HOSTS \ --include-default-paths \ diff --git a/src/ci/pgo.sh b/src/ci/pgo.sh index 28bed1fa035..4773dc09960 100755 --- a/src/ci/pgo.sh +++ b/src/ci/pgo.sh @@ -195,3 +195,7 @@ rm -r $BUILD_ARTIFACTS/llvm $BUILD_ARTIFACTS/lld $@ \ --rust-profile-use=${RUSTC_PROFILE_MERGED_FILE} \ --llvm-profile-use=${LLVM_PROFILE_MERGED_FILE} + +echo "Rustc binary size" +ls -la ./build/$PGO_HOST/stage2/bin +ls -la ./build/$PGO_HOST/stage2/lib |