Auto merge of #93577 - nikic:llvm-14, r=nagisa

Upgrade to LLVM 14

LLVM patch state:
 * [x] llvm/llvm-project@a55727f Backported.
 * [x] rust-lang/llvm-project@c3c82dc Backported as llvm/llvm-project@917c47b.
 * [x] rust-lang/llvm-project@6e8f9ab No plan to upstream.
 * [x] llvm/llvm-project@319f4b2 Backported.
 * [x] rust-lang/llvm-project@8b2c25d No plan to upstream.
 * [x] rust-lang/llvm-project@75fef2e No plan to upstream.
 * [ ] rust-lang/llvm-project@adef757 Upstreamed as llvm/llvm-project@2d2ef38. Needs backport.
 * [x] rust-lang/llvm-project@4b7c1b4 No plan to upstream.
 * [x] rust-lang/llvm-project@3f5ab0c No plan to upstream.
 * [x] rust-lang/llvm-project@514d055 No plan to upstream.
 * [ ] rust-lang/llvm-project@54c5869 Under review at https://reviews.llvm.org/D119695 and https://reviews.llvm.org/D119856.

Release timeline:
 * LLVM 14.0.0 final planned for Mar 15.
 * Rust 1.60.0 planned for Apr 7.

Compile-time:
  * https://perf.rust-lang.org/compare.html?start=250384edc5d78533e993f38c60d64e42b21684b2&end=b87df8d2c7c5d9ac448c585de10927ab2ee1b864
  * A slight improvement on average, though no big changes either way.
  * There are some larger max-rss improvements.

r? `@ghost`

Author: bors

.gitmodules

@@ -34,7 +34,7 @@
 [submodule "src/llvm-project"]
 	path = src/llvm-project
 	url = https://github.com/rust-lang/llvm-project.git
-	branch = rustc/13.0-2021-09-30
+	branch = rustc/14.0-2022-02-09
 [submodule "src/doc/embedded-book"]
 	path = src/doc/embedded-book
 	url = https://github.com/rust-embedded/book.git

Cargo.lock

@@ -740,9 +740,9 @@ dependencies = [
 
 [[package]]
 name = "compiler_builtins"
-version = "0.1.69"
+version = "0.1.70"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac0d1d6b2307c15fd27af2bb41234b4ebddeae69f33714bfbdb44b3b5a6e3efe"
+checksum = "80873f979f0a344a4ade87c2f70d9ccf5720b83b10c97ec7cd745895d021e85a"
 dependencies = [
  "cc",
  "rustc-std-workspace-core",

compiler/rustc_codegen_llvm/src/context.rs

@@ -135,7 +135,8 @@ pub unsafe fn create_module<'ll>(
     let llmod = llvm::LLVMModuleCreateWithNameInContext(mod_name.as_ptr(), llcx);
 
     let mut target_data_layout = sess.target.data_layout.clone();
-    if llvm_util::get_version() < (13, 0, 0) {
+    let llvm_version = llvm_util::get_version();
+    if llvm_version < (13, 0, 0) {
         if sess.target.arch == "powerpc64" {
             target_data_layout = target_data_layout.replace("-S128", "");
         }
@@ -146,6 +147,18 @@ pub unsafe fn create_module<'ll>(
             target_data_layout = "e-m:e-p:64:64-i64:64-n32:64-S128".to_string();
         }
     }
+    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();
+        }
+        if sess.target.arch == "wasm32" {
+            target_data_layout = target_data_layout.replace("-p10:8:8-p20:8:8", "");
+        }
+    }
 
     // Ensure the data-layout values hardcoded remain the defaults.
     if sess.target.is_builtin {

compiler/rustc_codegen_llvm/src/llvm_util.rs

@@ -217,24 +217,32 @@ pub fn check_tied_features(
 
 pub fn target_features(sess: &Session) -> Vec<Symbol> {
     let target_machine = create_informational_target_machine(sess);
-    supported_target_features(sess)
-        .iter()
-        .filter_map(
-            |&(feature, gate)| {
+    let mut features: Vec<Symbol> =
+        supported_target_features(sess)
+            .iter()
+            .filter_map(|&(feature, gate)| {
                 if sess.is_nightly_build() || gate.is_none() { Some(feature) } else { None }
-            },
-        )
-        .filter(|feature| {
-            for llvm_feature in to_llvm_feature(sess, feature) {
-                let cstr = CString::new(llvm_feature).unwrap();
-                if unsafe { llvm::LLVMRustHasFeature(target_machine, cstr.as_ptr()) } {
-                    return true;
+            })
+            .filter(|feature| {
+                for llvm_feature in to_llvm_feature(sess, feature) {
+                    let cstr = CString::new(llvm_feature).unwrap();
+                    if unsafe { llvm::LLVMRustHasFeature(target_machine, cstr.as_ptr()) } {
+                        return true;
+                    }
                 }
-            }
-            false
-        })
-        .map(|feature| Symbol::intern(feature))
-        .collect()
+                false
+            })
+            .map(|feature| Symbol::intern(feature))
+            .collect();
+
+    // LLVM 14 changed the ABI for i128 arguments to __float/__fix builtins on Win64
+    // (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) {
+        features.push(Symbol::intern("llvm14-builtins-abi"));
+    }
+    features
 }
 
 pub fn print_version() {

compiler/rustc_target/src/spec/i686_pc_windows_msvc.rs

@@ -24,7 +24,7 @@ pub fn target() -> Target {
         llvm_target: "i686-pc-windows-msvc".to_string(),
         pointer_width: 32,
         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"
+            i64:64-f80:128-n8:16:32-a:0:32-S32"
             .to_string(),
         arch: "x86".to_string(),
         options: base,

compiler/rustc_target/src/spec/i686_uwp_windows_msvc.rs

@@ -9,7 +9,7 @@ pub fn target() -> Target {
         llvm_target: "i686-pc-windows-msvc".to_string(),
         pointer_width: 32,
         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"
+            i64:64-f80:128-n8:16:32-a:0:32-S32"
             .to_string(),
         arch: "x86".to_string(),
         options: base,

compiler/rustc_target/src/spec/wasm32_unknown_emscripten.rs

@@ -43,7 +43,8 @@ pub fn target() -> Target {
     Target {
         llvm_target: "wasm32-unknown-emscripten".to_string(),
         pointer_width: 32,
-        data_layout: "e-m:e-p:32:32-i64:64-f128:64-n32:64-S128-ni:1:10:20".to_string(),
+        data_layout: "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-f128:64-n32:64-S128-ni:1:10:20"
+            .to_string(),
         arch: "wasm32".to_string(),
         options: opts,
     }

compiler/rustc_target/src/spec/wasm32_unknown_unknown.rs

@@ -54,7 +54,7 @@ pub fn target() -> Target {
     Target {
         llvm_target: "wasm32-unknown-unknown".to_string(),
         pointer_width: 32,
-        data_layout: "e-m:e-p:32:32-i64:64-n32:64-S128-ni:1:10:20".to_string(),
+        data_layout: "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20".to_string(),
         arch: "wasm32".to_string(),
         options,
     }

compiler/rustc_target/src/spec/wasm32_wasi.rs

@@ -109,7 +109,7 @@ pub fn target() -> Target {
     Target {
         llvm_target: "wasm32-wasi".to_string(),
         pointer_width: 32,
-        data_layout: "e-m:e-p:32:32-i64:64-n32:64-S128-ni:1:10:20".to_string(),
+        data_layout: "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20".to_string(),
         arch: "wasm32".to_string(),
         options,
     }

src/bootstrap/dist.rs

@@ -734,6 +734,8 @@ fn copy_src_dirs(
             "llvm-project\\llvm",
             "llvm-project/compiler-rt",
             "llvm-project\\compiler-rt",
+            "llvm-project/cmake",
+            "llvm-project\\cmake",
         ];
         if spath.contains("llvm-project")
             && !spath.ends_with("llvm-project")