Update the minimum external LLVM to 14

4 files changed, 5 insertions, 37 deletions

diff --git a/compiler/rustc_codegen_llvm/src/consts.rs b/compiler/rustc_codegen_llvm/src/consts.rs
index cad3c5d87b7..92629aa18d4 100644
--- a/compiler/rustc_codegen_llvm/src/consts.rs
+++ b/compiler/rustc_codegen_llvm/src/consts.rs
@@ -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 {
diff --git a/compiler/rustc_codegen_llvm/src/context.rs b/compiler/rustc_codegen_llvm/src/context.rs
index c0b23585d3a..120dc59dfb3 100644
--- a/compiler/rustc_codegen_llvm/src/context.rs
+++ b/compiler/rustc_codegen_llvm/src/context.rs
@@ -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", "");
diff --git a/compiler/rustc_codegen_llvm/src/llvm_util.rs b/compiler/rustc_codegen_llvm/src/llvm_util.rs
index 79b243f73d1..12e3581c663 100644
--- a/compiler/rustc_codegen_llvm/src/llvm_util.rs
+++ b/compiler/rustc_codegen_llvm/src/llvm_util.rs
@@ -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,
diff --git a/compiler/rustc_codegen_llvm/src/type_of.rs b/compiler/rustc_codegen_llvm/src/type_of.rs
index c73d233b767..0cb4bc806a1 100644
--- a/compiler/rustc_codegen_llvm/src/type_of.rs
+++ b/compiler/rustc_codegen_llvm/src/type_of.rs
@@ -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 }) =