bjoernager/rust
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Update the minimum external LLVM to 14

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This commit is contained in:
Josh Stone 2023-02-01 12:52:06 -08:00
parent 2773383a31
commit a06aaa4a9e
42 changed files with 54 additions and 205 deletions
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9
compiler/rustc_codegen_llvm/src/consts.rs
View file

@ -3,7 +3,6 @@ use crate::common::{self, CodegenCx};
use crate::debuginfo;
use crate::errors::{InvalidMinimumAlignment, SymbolAlreadyDefined};
use crate::llvm::{self, True};
use crate::llvm_util;
use crate::type_::Type;
use crate::type_of::LayoutLlvmExt;
use crate::value::Value;
@ -56,13 +55,7 @@ pub fn const_alloc_to_llvm<'ll>(cx: &CodegenCx<'ll, '_>, alloc: ConstAllocation<
// to avoid the cost of generating large complex const expressions.
// For example, `[(u32, u8); 1024 * 1024]` contains uninit padding in each element,
// and would result in `{ [5 x i8] zeroinitializer, [3 x i8] undef, ...repeat 1M times... }`.
let max = if llvm_util::get_version() < (14, 0, 0) {
// Generating partially-uninit consts inhibits optimizations in LLVM < 14.
// See https://github.com/rust-lang/rust/issues/84565.
1
} else {
cx.sess().opts.unstable_opts.uninit_const_chunk_threshold
};
let max = cx.sess().opts.unstable_opts.uninit_const_chunk_threshold;
let allow_uninit_chunks = chunks.clone().take(max.saturating_add(1)).count() <= max;
if allow_uninit_chunks {

11
compiler/rustc_codegen_llvm/src/context.rs
View file

@ -143,17 +143,6 @@ pub unsafe fn create_module<'ll>(
let mut target_data_layout = sess.target.data_layout.to_string();
let llvm_version = llvm_util::get_version();
if llvm_version < (14, 0, 0) {
if sess.target.llvm_target == "i686-pc-windows-msvc"
|| sess.target.llvm_target == "i586-pc-windows-msvc"
{
target_data_layout =
"e-m:x-p:32:32-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:32-n8:16:32-a:0:32-S32"
.to_string();
} else if sess.target.arch == "wasm32" {
target_data_layout = target_data_layout.replace("-p10:8:8-p20:8:8", "");
}
}
if llvm_version < (16, 0, 0) {
if sess.target.arch == "s390x" {
target_data_layout = target_data_layout.replace("-v128:64", "");

15
compiler/rustc_codegen_llvm/src/llvm_util.rs
View file

@ -152,13 +152,7 @@ pub fn time_trace_profiler_finish(file_name: &Path) {
pub fn to_llvm_features<'a>(sess: &Session, s: &'a str) -> SmallVec<[&'a str; 2]> {
let arch = if sess.target.arch == "x86_64" { "x86" } else { &*sess.target.arch };
match (arch, s) {
("x86", "sse4.2") => {
if get_version() >= (14, 0, 0) {
smallvec!["sse4.2", "crc32"]
} else {
smallvec!["sse4.2"]
}
}
("x86", "sse4.2") => smallvec!["sse4.2", "crc32"],
("x86", "pclmulqdq") => smallvec!["pclmul"],
("x86", "rdrand") => smallvec!["rdrnd"],
("x86", "bmi1") => smallvec!["bmi"],
@ -243,7 +237,7 @@ pub fn target_features(sess: &Session, allow_unstable: bool) -> Vec<Symbol> {
// (see https://reviews.llvm.org/D110413). This unstable target feature is intended for use
// by compiler-builtins, to export the builtins with the expected, LLVM-version-dependent ABI.
// The target feature can be dropped once we no longer support older LLVM versions.
if sess.is_nightly_build() && get_version() >= (14, 0, 0) {
if sess.is_nightly_build() {
features.push(Symbol::intern("llvm14-builtins-abi"));
}
features
@ -494,11 +488,6 @@ pub(crate) fn global_llvm_features(sess: &Session, diagnostics: bool) -> Vec<Str
.flatten();
features.extend(feats);
// FIXME: Move v8a to target definition list when earliest supported LLVM is 14.
if get_version() >= (14, 0, 0) && sess.target.arch == "aarch64" {
features.push("+v8a".into());
}
if diagnostics && let Some(f) = check_tied_features(sess, &featsmap) {
sess.emit_err(TargetFeatureDisableOrEnable {
features: f,

7
compiler/rustc_codegen_llvm/src/type_of.rs
View file

@ -1,6 +1,5 @@
use crate::common::*;
use crate::context::TypeLowering;
use crate::llvm_util::get_version;
use crate::type_::Type;
use rustc_codegen_ssa::traits::*;
use rustc_middle::bug;
@ -43,10 +42,8 @@ fn uncached_llvm_type<'a, 'tcx>(
// in problematically distinct types due to HRTB and subtyping (see #47638).
// ty::Dynamic(..) |
ty::Adt(..) | ty::Closure(..) | ty::Foreign(..) | ty::Generator(..) | ty::Str
// For performance reasons we use names only when emitting LLVM IR. Unless we are on
// LLVM < 14, where the use of unnamed types resulted in various issues, e.g., #76213,
// #79564, and #79246.
if get_version() < (14, 0, 0) || !cx.sess().fewer_names() =>
// For performance reasons we use names only when emitting LLVM IR.
if !cx.sess().fewer_names() =>
{
let mut name = with_no_visible_paths!(with_no_trimmed_paths!(layout.ty.to_string()));
if let (&ty::Adt(def, _), &Variants::Single { index }) =