Auto merge of #145890 - GuillaumeGomez:subtree-update_cg_gcc_2025-08-26, r=GuillaumeGomez

GCC backend subtree update

cc `@antoyo`

r? ghost

compiler/rustc_codegen_gcc/.github/workflows/m68k.yml

@@ -82,20 +82,16 @@ jobs:
     - name: Build sample project with target defined as JSON spec
       run: |
         ./y.sh prepare --only-libcore --cross
-        ./y.sh build --sysroot --features compiler-builtins-no-f16-f128 --target-triple m68k-unknown-linux-gnu --target ${{ github.workspace }}/target_specs/m68k-unknown-linux-gnu.json
+        ./y.sh build --sysroot --target-triple m68k-unknown-linux-gnu --target ${{ github.workspace }}/target_specs/m68k-unknown-linux-gnu.json
         CG_RUSTFLAGS="-Clinker=m68k-unknown-linux-gnu-gcc" ./y.sh cargo build --manifest-path=./tests/hello-world/Cargo.toml --target ${{ github.workspace }}/target_specs/m68k-unknown-linux-gnu.json
         ./y.sh clean all
 
     - name: Build
       run: |
         ./y.sh prepare --only-libcore --cross
-        ./y.sh build --sysroot --features compiler-builtins-no-f16-f128 --target-triple m68k-unknown-linux-gnu
+        ./y.sh build --sysroot --target-triple m68k-unknown-linux-gnu
         ./y.sh test --mini-tests --target-triple m68k-unknown-linux-gnu
-        # FIXME: since https://github.com/rust-lang/rust/pull/140809, we cannot run programs for architectures not
+        CG_GCC_TEST_TARGET=m68k-unknown-linux-gnu ./y.sh test --cargo-tests --target-triple m68k-unknown-linux-gnu
-        # supported by the object crate, since this adds a dependency on symbols.o for the panic runtime.
-        # And as such, a wrong order of the object files in the linker command now fails with an undefined reference
-        # to some symbols like __rustc::rust_panic.
-        #CG_GCC_TEST_TARGET=m68k-unknown-linux-gnu ./y.sh test --cargo-tests --target-triple m68k-unknown-linux-gnu
         ./y.sh clean all
 
     - name: Prepare dependencies
@@ -104,23 +100,21 @@ jobs:
         git config --global user.name "User"
         ./y.sh prepare --cross
 
-    # FIXME: We cannot run programs for architectures not supported by the object crate. See comment above.
+    - name: Run tests
-    #- name: Run tests
+      run: |
-      #run: |
+        ./y.sh test --target-triple m68k-unknown-linux-gnu --release --clean --build-sysroot ${{ matrix.commands }}
-        #./y.sh test --target-triple m68k-unknown-linux-gnu --release --clean --build-sysroot --sysroot-features compiler-builtins-no-f16-f128 ${{ matrix.commands }}
 
-    # FIXME: We cannot run programs for architectures not supported by the object crate. See comment above.
+    - name: Run Hello World!
-    #- name: Run Hello World!
+      run: |
-      #run: |
+        ./y.sh build --target-triple m68k-unknown-linux-gnu
-        #./y.sh build --target-triple m68k-unknown-linux-gnu
 
-        #vm_dir=$(pwd)/vm
+        vm_dir=$(pwd)/vm
-        #cd tests/hello-world
+        cd tests/hello-world
-        #CG_RUSTFLAGS="-Clinker=m68k-unknown-linux-gnu-gcc" ../../y.sh cargo build --target m68k-unknown-linux-gnu
+        CG_RUSTFLAGS="-Clinker=m68k-unknown-linux-gnu-gcc" ../../y.sh cargo build --target m68k-unknown-linux-gnu
-        #sudo cp target/m68k-unknown-linux-gnu/debug/hello_world $vm_dir/home/
+        sudo cp target/m68k-unknown-linux-gnu/debug/hello_world $vm_dir/home/
-        #sudo chroot $vm_dir qemu-m68k-static /home/hello_world > hello_world_stdout
+        sudo chroot $vm_dir qemu-m68k-static /home/hello_world > hello_world_stdout
-        #expected_output="40"
+        expected_output="40"
-        #test $(cat hello_world_stdout) == $expected_output || (echo "Output differs. Actual output: $(cat hello_world_stdout)"; exit 1)
+        test $(cat hello_world_stdout) == $expected_output || (echo "Output differs. Actual output: $(cat hello_world_stdout)"; exit 1)
 
   # Summary job for the merge queue.
   # ALL THE PREVIOUS JOBS NEED TO BE ADDED TO THE `needs` SECTION OF THIS JOB!

compiler/rustc_codegen_gcc/Cargo.lock

@@ -56,18 +56,18 @@ dependencies = [
 
 [[package]]
 name = "gccjit"
-version = "2.7.0"
+version = "2.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae99a89184220d967dd300139f2d2ae7d52c1a69d632b24aacc57c54625254ce"
+checksum = "4a0e310ef75f396cd11b2443b353d55376656ca92c13cba36f92b7aff346ac1a"
 dependencies = [
  "gccjit_sys",
 ]
 
 [[package]]
 name = "gccjit_sys"
-version = "0.8.0"
+version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "24edb7bfe2b7b27c6d09ed23eebfcab0b359c8fe978433f902943e6f127a0f1b"
+checksum = "95ed7572b30cd32430294dde6fb70822d58e67c6846a548647e8739776a0125b"
 dependencies = [
  "libc",
 ]

compiler/rustc_codegen_gcc/Cargo.toml

@@ -24,7 +24,7 @@ default = ["master"]
 [dependencies]
 object = { version = "0.37.0", default-features = false, features = ["std", "read"] }
 tempfile = "3.20"
-gccjit = "2.7"
+gccjit = "2.8"
 #gccjit = { git = "https://github.com/rust-lang/gccjit.rs" }
 
 # Local copy.

compiler/rustc_codegen_gcc/build_system/src/fmt.rs

@@ -1,7 +1,7 @@
 use std::ffi::OsStr;
 use std::path::Path;
 
-use crate::utils::run_command_with_output;
+use crate::utils::{run_command_with_output, walk_dir};
 
 fn show_usage() {
     println!(
@@ -32,5 +32,31 @@ pub fn run() -> Result<(), String> {
         if check { &[&"cargo", &"fmt", &"--check"] } else { &[&"cargo", &"fmt"] };
 
     run_command_with_output(cmd, Some(Path::new(".")))?;
-    run_command_with_output(cmd, Some(Path::new("build_system")))
+    run_command_with_output(cmd, Some(Path::new("build_system")))?;
+
+    run_rustfmt_recursively("tests/run", check)
+}
+
+fn run_rustfmt_recursively<P>(dir: P, check: bool) -> Result<(), String>
+where
+    P: AsRef<Path>,
+{
+    walk_dir(
+        dir,
+        &mut |dir| run_rustfmt_recursively(dir, check),
+        &mut |file_path| {
+            if file_path.extension().filter(|ext| ext == &OsStr::new("rs")).is_some() {
+                let rustfmt_cmd: &[&dyn AsRef<OsStr>] = if check {
+                    &[&"rustfmt", &"--check", &file_path]
+                } else {
+                    &[&"rustfmt", &file_path]
+                };
+
+                run_command_with_output(rustfmt_cmd, Some(Path::new(".")))
+            } else {
+                Ok(())
+            }
+        },
+        true,
+    )
 }

compiler/rustc_codegen_gcc/build_system/src/test.rs

@@ -531,7 +531,7 @@ fn setup_rustc(env: &mut Env, args: &TestArg) -> Result<PathBuf, String> {
             r#"change-id = 115898
 
 [rust]
-codegen-backends = []
+codegen-backends = ["gcc"]
 deny-warnings = false
 verbose-tests = true
 

compiler/rustc_codegen_gcc/libgccjit.version

@@ -1 +1 @@
-04ce66d8c918de9273bd7101638ad8724edf5e21
+4e995bd73c4490edfe5080ec6014d63aa9abed5f

compiler/rustc_codegen_gcc/rust-toolchain

@@ -1,3 +1,3 @@
 [toolchain]
-channel = "nightly-2025-08-03"
+channel = "nightly-2025-08-25"
 components = ["rust-src", "rustc-dev", "llvm-tools-preview"]

compiler/rustc_codegen_gcc/src/intrinsic/simd.rs

@@ -1497,7 +1497,6 @@ fn simd_funnel_shift<'a, 'gcc, 'tcx>(
         let index = bx.context.new_rvalue_from_int(bx.int_type, i as i32);
         let a_val = bx.context.new_vector_access(None, a, index).to_rvalue();
         let a_val = bx.context.new_bitcast(None, a_val, unsigned_type);
-        // TODO: we probably need to use gcc_int_cast instead.
         let a_val = bx.gcc_int_cast(a_val, new_int_type);
         let b_val = bx.context.new_vector_access(None, b, index).to_rvalue();
         let b_val = bx.context.new_bitcast(None, b_val, unsigned_type);

compiler/rustc_codegen_gcc/tests/failing-run-make-tests.txt

@@ -6,7 +6,6 @@ tests/run-make/doctests-keep-binaries/
 tests/run-make/doctests-runtool/
 tests/run-make/emit-shared-files/
 tests/run-make/exit-code/
-tests/run-make/issue-64153/
 tests/run-make/llvm-ident/
 tests/run-make/native-link-modifier-bundle/
 tests/run-make/remap-path-prefix-dwarf/
@@ -34,8 +33,6 @@ tests/run-make/c-link-to-rust-staticlib/
 tests/run-make/foreign-double-unwind/
 tests/run-make/foreign-exceptions/
 tests/run-make/glibc-staticlib-args/
-tests/run-make/issue-36710/
-tests/run-make/issue-68794-textrel-on-minimal-lib/
 tests/run-make/lto-smoke-c/
 tests/run-make/return-non-c-like-enum/
 

compiler/rustc_codegen_gcc/tests/failing-ui-tests.txt

@@ -20,7 +20,7 @@ tests/ui/drop/dynamic-drop.rs
 tests/ui/rfcs/rfc-2091-track-caller/std-panic-locations.rs
 tests/ui/simd/issue-17170.rs
 tests/ui/simd/issue-39720.rs
-tests/ui/issues/issue-14875.rs
+tests/ui/drop/panic-during-drop-14875.rs
 tests/ui/issues/issue-29948.rs
 tests/ui/process/println-with-broken-pipe.rs
 tests/ui/lto/thin-lto-inlines2.rs
@@ -86,3 +86,5 @@ tests/ui/panics/unwind-force-no-unwind-tables.rs
 tests/ui/attributes/fn-align-dyn.rs
 tests/ui/linkage-attr/raw-dylib/elf/glibc-x86_64.rs
 tests/ui/explicit-tail-calls/recursion-etc.rs
+tests/ui/explicit-tail-calls/indexer.rs
+tests/ui/explicit-tail-calls/drop-order.rs

compiler/rustc_codegen_gcc/tests/run/int.rs

@@ -7,12 +7,10 @@ fn main() {
     use std::hint::black_box;
 
     macro_rules! check {
-        ($ty:ty, $expr:expr) => {
+        ($ty:ty, $expr:expr) => {{
-            {
+            const EXPECTED: $ty = $expr;
-                const EXPECTED: $ty = $expr;
+            assert_eq!($expr, EXPECTED);
-                assert_eq!($expr, EXPECTED);
+        }};
-            }
-        };
     }
 
     check!(u32, (2220326408_u32 + black_box(1)) >> (32 - 6));

compiler/rustc_codegen_gcc/tests/run/int_overflow.rs

@@ -12,7 +12,7 @@ fn main() {
 
     let arg_count = std::env::args().count();
     let int = isize::MAX;
-    let _int = int + arg_count as isize;  // overflow
+    let _int = int + arg_count as isize; // overflow
 
     // If overflow checking is disabled, we should reach here.
     #[cfg(not(debug_assertions))]

compiler/rustc_codegen_gcc/tests/run/structs.rs

@@ -27,12 +27,8 @@ fn one() -> isize {
 
 #[no_mangle]
 extern "C" fn main(argc: i32, _argv: *const *const u8) -> i32 {
-    let test = Test {
+    let test = Test { field: one() };
-        field: one(),
+    let two = Two { two: 2 };
-    };
-    let two = Two {
-        two: 2,
-    };
     unsafe {
         libc::printf(b"%ld\n\0" as *const u8 as *const i8, test.field);
         libc::printf(b"%ld\n\0" as *const u8 as *const i8, two.two);

compiler/rustc_codegen_gcc/tests/run/volatile.rs

@@ -12,15 +12,11 @@ struct Struct {
     func: unsafe fn(*const ()),
 }
 
-fn func(_ptr: *const ()) {
+fn func(_ptr: *const ()) {}
-}
 
 fn main() {
     let mut x = MaybeUninit::<&Struct>::uninit();
-    x.write(&Struct {
+    x.write(&Struct { pointer: std::ptr::null(), func });
-        pointer: std::ptr::null(),
-        func,
-    });
     let x = unsafe { x.assume_init() };
     let value = unsafe { (x as *const Struct).read_volatile() };
     println!("{:?}", value);

compiler/rustc_codegen_gcc/tests/run/volatile2.rs

@@ -7,7 +7,14 @@ mod libc {
     #[link(name = "c")]
     extern "C" {
         pub fn sigaction(signum: i32, act: *const sigaction, oldact: *mut sigaction) -> i32;
-        pub fn mmap(addr: *mut (), len: usize, prot: i32, flags: i32, fd: i32, offset: i64) -> *mut ();
+        pub fn mmap(
+            addr: *mut (),
+            len: usize,
+            prot: i32,
+            flags: i32,
+            fd: i32,
+            offset: i64,
+        ) -> *mut ();
         pub fn mprotect(addr: *mut (), len: usize, prot: i32) -> i32;
     }
 
@@ -54,7 +61,8 @@ fn main() {
             libc::MAP_PRIVATE | libc::MAP_ANONYMOUS,
             -1,
             0,
-        ).cast();
+        )
+        .cast();
         if STORAGE == libc::MAP_FAILED {
             panic!("error: mmap failed");
         }