Rollup merge of #107573 - cuviper:drop-llvm-13, r=nagisa

Update the minimum external LLVM to 14

With this change, we'll have stable support for LLVM 14 through 16 (pending release).
For reference, the previous increase to LLVM 13 was #100460.

Author: matthiaskrgr

.github/workflows/ci.yml

@@ -54,7 +54,7 @@ jobs:
             tidy: true
             os: ubuntu-20.04-xl
             env: {}
-          - name: x86_64-gnu-llvm-13
+          - name: x86_64-gnu-llvm-14
             tidy: false
             os: ubuntu-20.04-xl
             env: {}
@@ -300,11 +300,7 @@ jobs:
             env:
               RUST_BACKTRACE: 1
             os: ubuntu-20.04-xl
-          - name: x86_64-gnu-llvm-13
-            env:
-              RUST_BACKTRACE: 1
-            os: ubuntu-20.04-xl
-          - name: x86_64-gnu-llvm-13-stage1
+          - name: x86_64-gnu-llvm-14-stage1
             env:
               RUST_BACKTRACE: 1
             os: ubuntu-20.04-xl

Cargo.lock

@@ -874,9 +874,9 @@ dependencies = [
 
 [[package]]
 name = "compiler_builtins"
-version = "0.1.85"
+version = "0.1.87"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "13e81c6cd7ab79f51a0c927d22858d61ad12bd0b3865f0b13ece02a4486aeabb"
+checksum = "f867ce54c09855ccd135ad4a50c777182a0c7af5ff20a8f537617bd648b10d50"
 dependencies = [
  "cc",
  "rustc-std-workspace-core",

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 {

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", "");