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LLVM PGO support

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This commit is contained in:
Sebastien Bourdeauducq 2021-12-26 21:11:14 +08:00
parent 8101483ebd
commit 6162d21a5b
4 changed files with 76 additions and 1 deletions
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61
flake.nix
View File

@ -66,6 +66,67 @@
'';
}
);
# LLVM PGO support
llvm-nac3-instrumented = pkgs.callPackage "${self}/llvm" {
stdenv = pkgs.llvmPackages_13.stdenv;
extraCmakeFlags = [ "-DLLVM_BUILD_INSTRUMENTED=IR" ];
};
nac3artiq-instrumented = pkgs.python3Packages.toPythonModule (
pkgs.rustPlatform.buildRustPackage {
name = "nac3artiq-instrumented";
src = self;
cargoLock = { lockFile = ./Cargo.lock; };
nativeBuildInputs = [ pkgs.python3 llvm-nac3-instrumented ];
buildInputs = [ pkgs.python3 llvm-nac3-instrumented ];
cargoBuildFlags = [ "--package" "nac3artiq" "--features" "init-llvm-profile" ];
doCheck = false;
configurePhase =
''
export CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_RUSTFLAGS="-C link-arg=-L${pkgs.llvmPackages_13.compiler-rt}/lib/linux -C link-arg=-lclang_rt.profile-x86_64"
'';
installPhase =
''
TARGET_DIR=$out/${pkgs.python3Packages.python.sitePackages}
mkdir -p $TARGET_DIR
cp target/x86_64-unknown-linux-gnu/release/libnac3artiq.so $TARGET_DIR/nac3artiq.so
'';
}
);
nac3artiq-profile = pkgs.stdenvNoCC.mkDerivation {
name = "nac3artiq-profile";
src = self;
buildInputs = [ (pkgs.python3.withPackages(ps: [ ps.numpy nac3artiq-instrumented ])) pkgs.lld_13 pkgs.llvmPackages_13.libllvm ];
phases = [ "buildPhase" "installPhase" ];
# TODO: get more representative code.
buildPhase = "python $src/nac3artiq/demo/demo.py";
installPhase =
''
mkdir $out
llvm-profdata merge -o $out/llvm.profdata /build/llvm/build/profiles/*
'';
};
llvm-nac3-pgo = pkgs.callPackage "${self}/llvm" {
stdenv = pkgs.llvmPackages_13.stdenv;
extraCmakeFlags = [ "-DLLVM_PROFDATA_FILE=${nac3artiq-profile}/llvm.profdata" ];
};
nac3artiq-pgo = pkgs.python3Packages.toPythonModule (
pkgs.rustPlatform.buildRustPackage {
name = "nac3artiq-pgo";
src = self;
cargoLock = { lockFile = ./Cargo.lock; };
nativeBuildInputs = [ pkgs.python3 llvm-nac3-pgo ];
buildInputs = [ pkgs.python3 llvm-nac3-pgo ];
cargoBuildFlags = [ "--package" "nac3artiq" ];
cargoTestFlags = [ "--package" "nac3ast" "--package" "nac3parser" "--package" "nac3core" "--package" "nac3artiq" ];
installPhase =
''
TARGET_DIR=$out/${pkgs.python3Packages.python.sitePackages}
mkdir -p $TARGET_DIR
cp target/x86_64-unknown-linux-gnu/release/libnac3artiq.so $TARGET_DIR/nac3artiq.so
'';
}
);
};
packages.x86_64-w64-mingw32 = rec {

3
llvm/default.nix
View File

@ -12,6 +12,7 @@
, debugVersion ? false
, enableManpages ? false
, enableSharedLibraries ? false
, extraCmakeFlags ? []
}:
let
@ -149,7 +150,7 @@ in stdenv.mkDerivation (rec {
];
in "-DCROSS_TOOLCHAIN_FLAGS_NATIVE:list=${lib.concatStringsSep ";" nativeToolchainFlags}"
)
];
] ++ extraCmakeFlags;
postBuild = ''
rm -fR $out

3
nac3artiq/Cargo.toml
View File

@ -19,3 +19,6 @@ nac3core = { path = "../nac3core" }
version = "0.1.0-beta.4"
default-features = false
features = ["llvm13-0", "target-x86", "target-arm", "target-riscv", "no-libffi-linking"]
[features]
init-llvm-profile = []

10
nac3artiq/src/lib.rs
View File

@ -685,8 +685,18 @@ impl Nac3 {
}
}
#[cfg(feature = "init-llvm-profile")]
extern "C" {
fn __llvm_profile_initialize();
}
#[pymodule]
fn nac3artiq(_py: Python, m: &PyModule) -> PyResult<()> {
#[cfg(feature = "init-llvm-profile")]
unsafe {
__llvm_profile_initialize();
}
Target::initialize_all(&InitializationConfig::default());
m.add_class::<Nac3>()?;
Ok(())