Merge commit '979dcf8e2f213e4f4b645cb62e7fe9f4f2c0c785' into sync_cg_clif-2025-05-25

Author: bjorn3

.github/workflows/main.yml

@@ -34,9 +34,9 @@ jobs:
     - name: Rustfmt
       run: |
         cargo fmt --check
-        rustfmt --check build_system/main.rs
-        rustfmt --check example/*
-        rustfmt --check scripts/*.rs
+        rustfmt --check --edition 2024 build_system/main.rs
+        rustfmt --check --edition 2024 example/*
+        rustfmt --check --edition 2024 scripts/*.rs
 
 
   test:

Cargo.lock

@@ -8,12 +8,12 @@ crate-type = ["dylib"]
 
 [dependencies]
 # These have to be in sync with each other
-cranelift-codegen = { version = "0.118.0", default-features = false, features = ["std", "timing", "unwind", "all-native-arch"] }
-cranelift-frontend = { version = "0.118.0" }
-cranelift-module = { version = "0.118.0" }
-cranelift-native = { version = "0.118.0" }
-cranelift-jit = { version = "0.118.0", optional = true }
-cranelift-object = { version = "0.118.0" }
+cranelift-codegen = { version = "0.120.0", default-features = false, features = ["std", "timing", "unwind", "all-native-arch"] }
+cranelift-frontend = { version = "0.120.0" }
+cranelift-module = { version = "0.120.0" }
+cranelift-native = { version = "0.120.0" }
+cranelift-jit = { version = "0.120.0", optional = true }
+cranelift-object = { version = "0.120.0" }
 target-lexicon = "0.13"
 gimli = { version = "0.31", default-features = false, features = ["write"] }
 object = { version = "0.36", default-features = false, features = ["std", "read_core", "write", "archive", "coff", "elf", "macho", "pe"] }
@@ -24,12 +24,12 @@ smallvec = "1.8.1"
 
 [patch.crates-io]
 # Uncomment to use an unreleased version of cranelift
-#cranelift-codegen = { git = "https://github.com/bytecodealliance/wasmtime.git", branch = "release-31.0.0", version = "0.118.0" }
-#cranelift-frontend = { git = "https://github.com/bytecodealliance/wasmtime.git", branch = "release-31.0.0", version = "0.118.0" }
-#cranelift-module = { git = "https://github.com/bytecodealliance/wasmtime.git", branch = "release-31.0.0", version = "0.118.0" }
-#cranelift-native = { git = "https://github.com/bytecodealliance/wasmtime.git", branch = "release-31.0.0", version = "0.118.0" }
-#cranelift-jit = { git = "https://github.com/bytecodealliance/wasmtime.git", branch = "release-31.0.0", version = "0.118.0" }
-#cranelift-object = { git = "https://github.com/bytecodealliance/wasmtime.git", branch = "release-31.0.0", version = "0.118.0" }
+#cranelift-codegen = { git = "https://github.com/bytecodealliance/wasmtime.git", branch = "release-33.0.0", version = "0.120.0" }
+#cranelift-frontend = { git = "https://github.com/bytecodealliance/wasmtime.git", branch = "release-33.0.0", version = "0.120.0" }
+#cranelift-module = { git = "https://github.com/bytecodealliance/wasmtime.git", branch = "release-33.0.0", version = "0.120.0" }
+#cranelift-native = { git = "https://github.com/bytecodealliance/wasmtime.git", branch = "release-33.0.0", version = "0.120.0" }
+#cranelift-jit = { git = "https://github.com/bytecodealliance/wasmtime.git", branch = "release-33.0.0", version = "0.120.0" }
+#cranelift-object = { git = "https://github.com/bytecodealliance/wasmtime.git", branch = "release-33.0.0", version = "0.120.0" }
 
 # Uncomment to use local checkout of cranelift
 #cranelift-codegen = { path = "../wasmtime/cranelift/codegen" }

Cargo.toml

@@ -7,7 +7,7 @@ If not please open an issue.
 
 ## Download using Rustup
 
-The Cranelift codegen backend is distributed in nightly builds on Linux and x86_64 macOS. If you want to
+The Cranelift codegen backend is distributed in nightly builds on Linux, macOS and x86_64 Windows. If you want to
 install it using Rustup, you can do that by running:
 
 ```bash
@@ -79,7 +79,7 @@ For more docs on how to build and test see [build_system/usage.txt](build_system
 Not all targets are available as rustup component for nightly. See notes in the platform support matrix.
 
 [^xcoff]: XCOFF object file format is not supported.
-[^no-rustup]: Not available as rustup component for nightly. You can build it yourself.
+[^no-rustup]: Not available as [rustup component for nightly](https://rust-lang.github.io/rustup-components-history/). You can build it yourself.
 
 ## Usage
 

Readme.md

@@ -18,7 +18,7 @@ pub(crate) fn build_backend(
     let mut cmd = CG_CLIF.build(&bootstrap_host_compiler, dirs);
 
     let mut rustflags = rustflags_from_env("RUSTFLAGS");
-    rustflags.push("-Zallow-features=rustc_private".to_owned());
+    rustflags.push("-Zallow-features=rustc_private,f16,f128".to_owned());
     rustflags_to_cmd_env(&mut cmd, "RUSTFLAGS", &rustflags);
 
     if env::var("CG_CLIF_EXPENSIVE_CHECKS").is_ok() {

build_system/build_backend.rs

@@ -168,7 +168,8 @@ fn build_llvm_sysroot_for_triple(compiler: Compiler) -> SysrootTarget {
         let file_name_str = file.file_name().unwrap().to_str().unwrap();
         if (file_name_str.contains("rustc_")
             && !file_name_str.contains("rustc_std_workspace_")
-            && !file_name_str.contains("rustc_demangle"))
+            && !file_name_str.contains("rustc_demangle")
+            && !file_name_str.contains("rustc_literal_escaper"))
             || file_name_str.contains("chalk")
             || file_name_str.contains("tracing")
             || file_name_str.contains("regex")
@@ -234,7 +235,7 @@ fn build_clif_sysroot_for_triple(
     compiler.rustflags.extend(rustflags);
     let mut build_cmd = STANDARD_LIBRARY.build(&compiler, dirs);
     build_cmd.arg("--release");
-    build_cmd.arg("--features").arg("backtrace panic-unwind compiler-builtins-no-f16-f128");
+    build_cmd.arg("--features").arg("backtrace panic-unwind");
     build_cmd.arg(format!("-Zroot-dir={}", STDLIB_SRC.to_path(dirs).display()));
     build_cmd.env("CARGO_PROFILE_RELEASE_DEBUG", "true");
     build_cmd.env("__CARGO_DEFAULT_LIB_METADATA", "cg_clif");

build_system/build_sysroot.rs

@@ -47,7 +47,7 @@ These are a few functions that allow you to easily run rust code from the shell
 
 ```bash
 function jit_naked() {
-    echo "$@" | $cg_clif_dir/dist/rustc-clif - -Zunstable-options -Cllvm-args=jit-mode-Cprefer-dynamic
+    echo "$@" | $cg_clif_dir/dist/rustc-clif - -Zunstable-options -Cllvm-args=jit-mode -Cprefer-dynamic
 }
 
 function jit() {

docs/usage.md

@@ -521,10 +521,28 @@ fn panic_cannot_unwind() -> ! {
 }
 
 #[lang = "eh_personality"]
-fn eh_personality() -> ! {
+// FIXME personality signature depends on target
+fn eh_personality(
+    _version: i32,
+    _actions: i32,
+    _exception_class: u64,
+    _exception_object: *mut (),
+    _context: *mut (),
+) -> i32 {
     loop {}
 }
 
+#[lang = "panic_in_cleanup"]
+fn panic_in_cleanup() -> ! {
+    loop {}
+}
+
+#[cfg(all(unix, not(target_vendor = "apple")))]
+#[link(name = "gcc_s")]
+extern "C" {
+    fn _Unwind_Resume(exc: *mut ()) -> !;
+}
+
 #[lang = "drop_in_place"]
 #[allow(unconditional_recursion)]
 pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {

example/mini_core.rs

@@ -166,6 +166,7 @@ fn main() {
         enum Never {}
     }
 
+    #[cfg(not(target_arch = "s390x"))] // s390x doesn't have vector instructions enabled by default
     foo(I64X2([0, 0]));
 
     transmute_wide_pointer();
@@ -203,9 +204,11 @@ fn rust_call_abi() {
     rust_call_abi_callee((1, 2));
 }
 
+#[cfg_attr(target_arch = "s390x", allow(dead_code))]
 #[repr(simd)]
 struct I64X2([i64; 2]);
 
+#[cfg_attr(target_arch = "s390x", allow(dead_code))]
 #[allow(improper_ctypes_definitions)]
 extern "C" fn foo(_a: I64X2) {}
 

example/std_example.rs

@@ -37,6 +37,15 @@ diff --git a/library/core/src/sync/atomic.rs b/library/core/src/sync/atomic.rs
 index bf2b6d59f88..d5ccce03bbf 100644
 --- a/library/core/src/sync/atomic.rs
 +++ b/library/core/src/sync/atomic.rs
+@@ -300,8 +300,6 @@ impl_atomic_primitive!(AtomicI32(i32), size("32"), align(4));
+ impl_atomic_primitive!(AtomicU32(u32), size("32"), align(4));
+ impl_atomic_primitive!(AtomicI64(i64), size("64"), align(8));
+ impl_atomic_primitive!(AtomicU64(u64), size("64"), align(8));
+-impl_atomic_primitive!(AtomicI128(i128), size("128"), align(16));
+-impl_atomic_primitive!(AtomicU128(u128), size("128"), align(16));
+ 
+ #[cfg(target_pointer_width = "16")]
+ impl_atomic_primitive!(AtomicIsize(isize), size("ptr"), align(2));
 @@ -3585,44 +3585,6 @@ pub const fn as_ptr(&self) -> *mut $int_type {
      8,
      u64 AtomicU64

patches/0027-stdlib-128bit-atomic-operations.patch

@@ -1,4 +1,4 @@
 [toolchain]
-channel = "nightly-2025-03-30"
+channel = "nightly-2025-05-25"
 components = ["rust-src", "rustc-dev", "llvm-tools"]
 profile = "minimal"

rust-toolchain

@@ -43,7 +43,7 @@ verbose-tests = false
 # disabled bootstrap will crash trying to copy llvm tools for the bootstrap
 # compiler.
 llvm-tools = false
-std-features = ["panic-unwind", "compiler-builtins-no-f16-f128"]
+std-features = ["panic-unwind"]
 
 EOF