Merge pull request rust-lang#440 from rust-lang/use-default-mangling

Use the default rust mangling

Author: antoyo

.github/workflows/ci.yml

@@ -19,8 +19,8 @@ jobs:
       fail-fast: false
       matrix:
         libgccjit_version:
-          - { gcc: "libgccjit.so", artifacts_branch: "master" }
-          - { gcc: "libgccjit_without_int128.so", artifacts_branch: "master-without-128bit-integers" }
+          - { gcc: "gcc-13.deb" }
+          - { gcc: "gcc-13-without-int128.deb" }
         commands: [
           "--mini-tests",
           "--std-tests",
@@ -49,10 +49,19 @@ jobs:
       # `llvm-14-tools` is needed to install the `FileCheck` binary which is used for asm tests.
       run: sudo apt-get install ninja-build ripgrep llvm-14-tools
 
+    - name: Download artifact
+      run: curl -LO https://github.com/antoyo/gcc/releases/latest/download/${{ matrix.libgccjit_version.gcc }}
+
+    - name: Setup path to libgccjit
+      run: |
+          sudo dpkg --force-overwrite -i ${{ matrix.libgccjit_version.gcc }}
+          echo 'gcc-path = "/usr/lib/"' > config.toml
+
     - name: Set env
       run: |
         echo "workspace="$GITHUB_WORKSPACE >> $GITHUB_ENV
-        echo 'download-gccjit = true' > config.toml
+        echo "LIBRARY_PATH=/usr/lib" >> $GITHUB_ENV
+        echo "LD_LIBRARY_PATH=/usr/lib" >> $GITHUB_ENV
 
     #- name: Cache rust repository
       ## We only clone the rust repository for rustc tests
@@ -67,15 +76,6 @@ jobs:
       run: |
         ./y.sh prepare --only-libcore
         ./y.sh build
-
-    - name: Set env (part 2)
-      run: |
-        # Set the `LD_LIBRARY_PATH` and `LIBRARY_PATH` env variables...
-        echo "LD_LIBRARY_PATH="$(./y.sh info | grep -v Using) >> $GITHUB_ENV
-        echo "LIBRARY_PATH="$(./y.sh info | grep -v Using) >> $GITHUB_ENV
-
-    - name: Build (part 2)
-      run: |
         cargo test
         ./y.sh clean all
 

.github/workflows/stdarch.yml

@@ -50,24 +50,24 @@ jobs:
           sudo ln -s /usr/share/intel-sde/sde /usr/bin/sde
           sudo ln -s /usr/share/intel-sde/sde64 /usr/bin/sde64
 
-    - name: Download artifact
-      run: curl -LO https://github.com/antoyo/gcc/releases/latest/download/gcc-13.deb
-
-    - name: Setup path to libgccjit
-      run: |
-          sudo dpkg --force-overwrite -i gcc-13.deb
-          echo 'gcc-path = "/usr/lib/"' > config.toml
-
     - name: Set env
       run: |
         echo "workspace="$GITHUB_WORKSPACE >> $GITHUB_ENV
-        echo "LIBRARY_PATH=/usr/lib" >> $GITHUB_ENV
-        echo "LD_LIBRARY_PATH=/usr/lib" >> $GITHUB_ENV
+        echo 'download-gccjit = true' > config.toml
 
     - name: Build
       run: |
         ./y.sh prepare --only-libcore
         ./y.sh build --release --release-sysroot
+
+    - name: Set env (part 2)
+      run: |
+        # Set the `LD_LIBRARY_PATH` and `LIBRARY_PATH` env variables...
+        echo "LD_LIBRARY_PATH="$(./y.sh info | grep -v Using) >> $GITHUB_ENV
+        echo "LIBRARY_PATH="$(./y.sh info | grep -v Using) >> $GITHUB_ENV
+
+    - name: Build (part 2)
+      run: |
         cargo test
 
     - name: Clean

Cargo.lock

@@ -415,8 +415,11 @@ impl ConfigInfo {
         if let Some(linker) = linker {
             rustflags.push(linker.to_string());
         }
+
+        #[cfg(not(feature="master"))]
+        rustflags.push("-Csymbol-mangling-version=v0".to_string());
+
         rustflags.extend_from_slice(&[
-            "-Csymbol-mangling-version=v0".to_string(),
             "-Cdebuginfo=2".to_string(),
             format!("-Zcodegen-backend={}", self.cg_backend_path),
         ]);

build_system/src/config.rs

@@ -612,6 +612,21 @@ fn asm_tests(env: &Env, args: &TestArg) -> Result<(), String> {
 
     env.insert("COMPILETEST_FORCE_STAGE0".to_string(), "1".to_string());
 
+    let rustc_args =
+        &format!(
+            r#"-Zpanic-abort-tests \
+            -Zcodegen-backend="{pwd}/target/{channel}/librustc_codegen_gcc.{dylib_ext}" \
+            --sysroot "{pwd}/build_sysroot/sysroot" -Cpanic=abort"#,
+            pwd = std::env::current_dir()
+                .map_err(|error| format!("`current_dir` failed: {:?}", error))?
+                .display(),
+            channel = args.config_info.channel.as_str(),
+            dylib_ext = args.config_info.dylib_ext,
+        );
+
+    #[cfg(not(feature="master"))]
+    let rustc_args = format!("{} -Csymbol-mangling-version=v0", rustc_args);
+
     run_command_with_env(
         &[
             &"./x.py",
@@ -622,17 +637,7 @@ fn asm_tests(env: &Env, args: &TestArg) -> Result<(), String> {
             &"0",
             &"tests/assembly/asm",
             &"--rustc-args",
-            &format!(
-                r#"-Zpanic-abort-tests -Csymbol-mangling-version=v0 \
-                -Zcodegen-backend="{pwd}/target/{channel}/librustc_codegen_gcc.{dylib_ext}" \
-                --sysroot "{pwd}/build_sysroot/sysroot" -Cpanic=abort"#,
-                pwd = std::env::current_dir()
-                    .map_err(|error| format!("`current_dir` failed: {:?}", error))?
-                    .display(),
-                channel = args.config_info.channel.as_str(),
-                dylib_ext = args.config_info.dylib_ext,
-            )
-            .as_str(),
+            &rustc_args,
         ],
         Some(&rust_dir),
         Some(&env),
@@ -1065,12 +1070,15 @@ where
     println!("[TEST] rustc test suite");
     env.insert("COMPILETEST_FORCE_STAGE0".to_string(), "1".to_string());
     let rustc_args = format!(
-        "{} -Csymbol-mangling-version=v0 -Zcodegen-backend={} --sysroot {}",
+        "{} -Zcodegen-backend={} --sysroot {}",
         env.get("TEST_FLAGS").unwrap_or(&String::new()),
         args.config_info.cg_backend_path,
         args.config_info.sysroot_path,
     );
 
+    #[cfg(not(feature="master"))]
+    let rustc_args = format!("{} -Csymbol-mangling-version=v0", rustc_args);
+
     env.get_mut("RUSTFLAGS").unwrap().clear();
     run_command_with_output_and_env(
         &[

build_system/src/test.rs

@@ -1 +1 @@
-2fc8940e1
+cdd897840

libgccjit.version

@@ -125,7 +125,9 @@ fn declare_raw_fn<'gcc>(cx: &CodegenCx<'gcc, '_>, name: &str, _callconv: () /*ll
             let params: Vec<_> = param_types.into_iter().enumerate()
                 .map(|(index, param)| cx.context.new_parameter(None, *param, &format!("param{}", index))) // TODO(antoyo): set name.
                 .collect();
-            let func = cx.context.new_function(None, cx.linkage.get(), return_type, &params, mangle_name(name), variadic);
+            #[cfg(not(feature="master"))]
+            let name = mangle_name(name);
+            let func = cx.context.new_function(None, cx.linkage.get(), return_type, &params, &name, variadic);
             cx.functions.borrow_mut().insert(name.to_string(), func);
 
             #[cfg(feature="master")]
@@ -179,8 +181,10 @@ fn declare_raw_fn<'gcc>(cx: &CodegenCx<'gcc, '_>, name: &str, _callconv: () /*ll
 }
 
 // FIXME(antoyo): this is a hack because libgccjit currently only supports alpha, num and _.
-// Unsupported characters: `$` and `.`.
-pub fn mangle_name(name: &str) -> String {
+// Unsupported characters: `$`, `.` and `*`.
+// FIXME(antoyo): `*` might not be expected: https://github.com/rust-lang/rust/issues/116979#issuecomment-1840926865
+#[cfg(not(feature="master"))]
+fn mangle_name(name: &str) -> String {
     name.replace(|char: char| {
         if !char.is_alphanumeric() && char != '_' {
             debug_assert!("$.*".contains(char), "Unsupported char in function name {}: {}", name, char);

src/declare.rs

@@ -255,6 +255,7 @@ fn new_context<'gcc, 'tcx>(tcx: TyCtxt<'tcx>) -> Context<'gcc> {
     }
     #[cfg(feature="master")]
     {
+        context.set_allow_special_chars_in_func_names(true);
         let version = Version::get();
         let version = format!("{}.{}.{}", version.major, version.minor, version.patch);
         context.set_output_ident(&format!("rustc version {} with libgccjit {}",