bjoernager/rust
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Remove some minor checks for LLVM < 12

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This commit is contained in:
Josh Stone 2021-11-05 10:26:16 -07:00
parent d22dd65835
commit 1d04577ee0
3 changed files with 6 additions and 15 deletions
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14
compiler/rustc_codegen_llvm/src/abi.rs
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@ -1,7 +1,6 @@
use crate::builder::Builder;
use crate::context::CodegenCx;
use crate::llvm::{self, AttributePlace};
use crate::llvm_util;
use crate::type_::Type;
use crate::type_of::LayoutLlvmExt;
use crate::value::Value;
@ -53,15 +52,10 @@ pub trait ArgAttributesExt {
}
fn should_use_mutable_noalias(cx: &CodegenCx<'_, '_>) -> bool {
// LLVM prior to version 12 has known miscompiles in the presence of
// noalias attributes (see #54878). Only enable mutable noalias by
// default for versions we believe to be safe.
cx.tcx
.sess
.opts
.debugging_opts
.mutable_noalias
.unwrap_or_else(|| llvm_util::get_version() >= (12, 0, 0))
// LLVM prior to version 12 had known miscompiles in the presence of
// noalias attributes (see #54878), but we don't support earlier
// versions at all anymore. We now enable mutable noalias by default.
cx.tcx.sess.opts.debugging_opts.mutable_noalias.unwrap_or(true)
}
impl ArgAttributesExt for ArgAttributes {