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Move llvm_target_features back to llvm_util

This commit is contained in:
bjorn3 2018-06-23 17:22:35 +02:00
parent 679743646e
commit c7c534fa0e
4 changed files with 118 additions and 133 deletions
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118
src/librustc_codegen_llvm/llvm_util.rs
View File

@ -20,8 +20,6 @@ use syntax::feature_gate::UnstableFeatures;
use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::Once;
pub use rustc_codegen_utils::llvm_target_features::*;
static POISONED: AtomicBool = AtomicBool::new(false);
static INIT: Once = Once::new();
@ -81,6 +79,108 @@ unsafe fn configure_llvm(sess: &Session) {
llvm_args.as_ptr());
}
// WARNING: the features after applying `to_llvm_feature` must be known
// to LLVM or the feature detection code will walk past the end of the feature
// array, leading to crashes.
const ARM_WHITELIST: &[(&str, Option<&str>)] = &[
("mclass", Some("arm_target_feature")),
("neon", Some("arm_target_feature")),
("v7", Some("arm_target_feature")),
("vfp2", Some("arm_target_feature")),
("vfp3", Some("arm_target_feature")),
("vfp4", Some("arm_target_feature")),
];
const AARCH64_WHITELIST: &[(&str, Option<&str>)] = &[
("fp", Some("aarch64_target_feature")),
("neon", Some("aarch64_target_feature")),
("sve", Some("aarch64_target_feature")),
("crc", Some("aarch64_target_feature")),
("crypto", Some("aarch64_target_feature")),
("ras", Some("aarch64_target_feature")),
("lse", Some("aarch64_target_feature")),
("rdm", Some("aarch64_target_feature")),
("fp16", Some("aarch64_target_feature")),
("rcpc", Some("aarch64_target_feature")),
("dotprod", Some("aarch64_target_feature")),
("v8.1a", Some("aarch64_target_feature")),
("v8.2a", Some("aarch64_target_feature")),
("v8.3a", Some("aarch64_target_feature")),
];
const X86_WHITELIST: &[(&str, Option<&str>)] = &[
("aes", None),
("avx", None),
("avx2", None),
("avx512bw", Some("avx512_target_feature")),
("avx512cd", Some("avx512_target_feature")),
("avx512dq", Some("avx512_target_feature")),
("avx512er", Some("avx512_target_feature")),
("avx512f", Some("avx512_target_feature")),
("avx512ifma", Some("avx512_target_feature")),
("avx512pf", Some("avx512_target_feature")),
("avx512vbmi", Some("avx512_target_feature")),
("avx512vl", Some("avx512_target_feature")),
("avx512vpopcntdq", Some("avx512_target_feature")),
("bmi1", None),
("bmi2", None),
("fma", None),
("fxsr", None),
("lzcnt", None),
("mmx", Some("mmx_target_feature")),
("pclmulqdq", None),
("popcnt", None),
("rdrand", None),
("rdseed", None),
("sha", None),
("sse", None),
("sse2", None),
("sse3", None),
("sse4.1", None),
("sse4.2", None),
("sse4a", Some("sse4a_target_feature")),
("ssse3", None),
("tbm", Some("tbm_target_feature")),
("xsave", None),
("xsavec", None),
("xsaveopt", None),
("xsaves", None),
];
const HEXAGON_WHITELIST: &[(&str, Option<&str>)] = &[
("hvx", Some("hexagon_target_feature")),
("hvx-double", Some("hexagon_target_feature")),
];
const POWERPC_WHITELIST: &[(&str, Option<&str>)] = &[
("altivec", Some("powerpc_target_feature")),
("power8-altivec", Some("powerpc_target_feature")),
("power9-altivec", Some("powerpc_target_feature")),
("power8-vector", Some("powerpc_target_feature")),
("power9-vector", Some("powerpc_target_feature")),
("vsx", Some("powerpc_target_feature")),
];
const MIPS_WHITELIST: &[(&str, Option<&str>)] = &[
("fp64", Some("mips_target_feature")),
("msa", Some("mips_target_feature")),
];
/// When rustdoc is running, provide a list of all known features so that all their respective
/// primtives may be documented.
///
/// IMPORTANT: If you're adding another whitelist to the above lists, make sure to add it to this
/// iterator!
pub fn all_known_features() -> impl Iterator<Item=(&'static str, Option<&'static str>)> {
ARM_WHITELIST.iter().cloned()
.chain(AARCH64_WHITELIST.iter().cloned())
.chain(X86_WHITELIST.iter().cloned())
.chain(HEXAGON_WHITELIST.iter().cloned())
.chain(POWERPC_WHITELIST.iter().cloned())
.chain(MIPS_WHITELIST.iter().cloned())
}
pub fn to_llvm_feature<'a>(sess: &Session, s: &'a str) -> &'a str {
let arch = if sess.target.target.arch == "x86_64" {
"x86"
@ -116,6 +216,20 @@ pub fn target_features(sess: &Session) -> Vec<Symbol> {
.map(|feature| Symbol::intern(feature)).collect()
}
pub fn target_feature_whitelist(sess: &Session)
-> &'static [(&'static str, Option<&'static str>)]
{
match &*sess.target.target.arch {
"arm" => ARM_WHITELIST,
"aarch64" => AARCH64_WHITELIST,
"x86" | "x86_64" => X86_WHITELIST,
"hexagon" => HEXAGON_WHITELIST,
"mips" | "mips64" => MIPS_WHITELIST,
"powerpc" | "powerpc64" => POWERPC_WHITELIST,
_ => &[],
}
}
pub fn print_version() {
// Can be called without initializing LLVM
unsafe {

5
src/librustc_codegen_utils/codegen_backend.rs
View File

@ -42,6 +42,7 @@ use rustc::middle::cstore::EncodedMetadata;
use rustc::middle::cstore::MetadataLoader;
use rustc::dep_graph::DepGraph;
use rustc_target::spec::Target;
use rustc_data_structures::fx::FxHashMap;
use rustc_mir::monomorphize::collector;
use link::{build_link_meta, out_filename};
@ -132,9 +133,7 @@ impl CodegenBackend for MetadataOnlyCodegenBackend {
::symbol_names::provide(providers);
providers.target_features_whitelist = |_tcx, _cnum| {
Lrc::new(::llvm_target_features::all_known_features()
.map(|(a, b)| (a.to_string(), b.map(|s| s.to_string())))
.collect())
Lrc::new(FxHashMap()) // Just a dummy
};
providers.is_reachable_non_generic = |_tcx, _defid| true;
providers.exported_symbols = |_tcx, _crate| Arc::new(Vec::new());

1
src/librustc_codegen_utils/lib.rs
View File

@ -44,7 +44,6 @@ pub mod link;
pub mod codegen_backend;
pub mod symbol_names;
pub mod symbol_names_test;
pub mod llvm_target_features;
/// check for the #[rustc_error] annotation, which forces an
/// error in codegen. This is used to write compile-fail tests

127
src/librustc_codegen_utils/llvm_target_features.rs
View File

@ -1,127 +0,0 @@
// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use rustc::session::Session;
// WARNING: the features after applying `to_llvm_feature` must be known
// to LLVM or the feature detection code will walk past the end of the feature
// array, leading to crashes.
const ARM_WHITELIST: &[(&str, Option<&str>)] = &[
("mclass", Some("arm_target_feature")),
("neon", Some("arm_target_feature")),
("v7", Some("arm_target_feature")),
("vfp2", Some("arm_target_feature")),
("vfp3", Some("arm_target_feature")),
("vfp4", Some("arm_target_feature")),
];
const AARCH64_WHITELIST: &[(&str, Option<&str>)] = &[
("fp", Some("aarch64_target_feature")),
("neon", Some("aarch64_target_feature")),
("sve", Some("aarch64_target_feature")),
("crc", Some("aarch64_target_feature")),
("crypto", Some("aarch64_target_feature")),
("ras", Some("aarch64_target_feature")),
("lse", Some("aarch64_target_feature")),
("rdm", Some("aarch64_target_feature")),
("fp16", Some("aarch64_target_feature")),
("rcpc", Some("aarch64_target_feature")),
("dotprod", Some("aarch64_target_feature")),
("v8.1a", Some("aarch64_target_feature")),
("v8.2a", Some("aarch64_target_feature")),
("v8.3a", Some("aarch64_target_feature")),
];
const X86_WHITELIST: &[(&str, Option<&str>)] = &[
("aes", None),
("avx", None),
("avx2", None),
("avx512bw", Some("avx512_target_feature")),
("avx512cd", Some("avx512_target_feature")),
("avx512dq", Some("avx512_target_feature")),
("avx512er", Some("avx512_target_feature")),
("avx512f", Some("avx512_target_feature")),
("avx512ifma", Some("avx512_target_feature")),
("avx512pf", Some("avx512_target_feature")),
("avx512vbmi", Some("avx512_target_feature")),
("avx512vl", Some("avx512_target_feature")),
("avx512vpopcntdq", Some("avx512_target_feature")),
("bmi1", None),
("bmi2", None),
("fma", None),
("fxsr", None),
("lzcnt", None),
("mmx", Some("mmx_target_feature")),
("pclmulqdq", None),
("popcnt", None),
("rdrand", None),
("rdseed", None),
("sha", None),
("sse", None),
("sse2", None),
("sse3", None),
("sse4.1", None),
("sse4.2", None),
("sse4a", Some("sse4a_target_feature")),
("ssse3", None),
("tbm", Some("tbm_target_feature")),
("xsave", None),
("xsavec", None),
("xsaveopt", None),
("xsaves", None),
];
const HEXAGON_WHITELIST: &[(&str, Option<&str>)] = &[
("hvx", Some("hexagon_target_feature")),
("hvx-double", Some("hexagon_target_feature")),
];
const POWERPC_WHITELIST: &[(&str, Option<&str>)] = &[
("altivec", Some("powerpc_target_feature")),
("power8-altivec", Some("powerpc_target_feature")),
("power9-altivec", Some("powerpc_target_feature")),
("power8-vector", Some("powerpc_target_feature")),
("power9-vector", Some("powerpc_target_feature")),
("vsx", Some("powerpc_target_feature")),
];
const MIPS_WHITELIST: &[(&str, Option<&str>)] = &[
("fp64", Some("mips_target_feature")),
("msa", Some("mips_target_feature")),
];
/// When rustdoc is running, provide a list of all known features so that all their respective
/// primtives may be documented.
///
/// IMPORTANT: If you're adding another whitelist to the above lists, make sure to add it to this
/// iterator!
pub fn all_known_features() -> impl Iterator<Item=(&'static str, Option<&'static str>)> {
ARM_WHITELIST.iter().cloned()
.chain(AARCH64_WHITELIST.iter().cloned())
.chain(X86_WHITELIST.iter().cloned())
.chain(HEXAGON_WHITELIST.iter().cloned())
.chain(POWERPC_WHITELIST.iter().cloned())
.chain(MIPS_WHITELIST.iter().cloned())
}
pub fn target_feature_whitelist(sess: &Session)
-> &'static [(&'static str, Option<&'static str>)]
{
match &*sess.target.target.arch {
"arm" => ARM_WHITELIST,
"aarch64" => AARCH64_WHITELIST,
"x86" | "x86_64" => X86_WHITELIST,
"hexagon" => HEXAGON_WHITELIST,
"mips" | "mips64" => MIPS_WHITELIST,
"powerpc" | "powerpc64" => POWERPC_WHITELIST,
_ => &[],
}
}