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
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@ -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 {