Merge pull request #357 from rust-lang/fix/gcc-12

Fix for the libgccjit 12 CI

.github/workflows/failures.yml

@@ -19,16 +19,33 @@ 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: "libgccjit.so"
+            artifacts_branch: "master"
+          - gcc: "libgccjit_without_int128.so"
+            artifacts_branch: "master-without-128bit-integers"
+          - gcc: "libgccjit12.so"
+            artifacts_branch: "gcc12"
+            extra: "--no-default-features"
+            # FIXME(antoyo): we need to set GCC_EXEC_PREFIX so that the linker can find the linker plugin.
+            # Not sure why it's not found otherwise.
+            env_extra: "TEST_FLAGS='-Cpanic=abort -Zpanic-abort-tests' GCC_EXEC_PREFIX=/usr/lib/gcc/"
 
     steps:
     - uses: actions/checkout@v3
 
     - name: Install packages
       run: sudo apt-get install ninja-build ripgrep
 
+    - name: Install libgccjit12
+      if: matrix.libgccjit_version.gcc == 'libgccjit12.so'
+      run: sudo apt-get install libgccjit-12-dev
+
+    - name: Setup path to libgccjit
+      if: matrix.libgccjit_version.gcc == 'libgccjit12.so'
+      run: echo /usr/lib/gcc/x86_64-linux-gnu/12 > gcc_path
+
     - name: Download artifact
+      if: matrix.libgccjit_version.gcc != 'libgccjit12.so'
       uses: dawidd6/action-download-artifact@v2
       with:
           workflow: main.yml
@@ -40,6 +57,7 @@ jobs:
           search_artifacts: true # Because, instead, the action only check the last job ran and that won't work since we want multiple artifacts.
 
     - name: Setup path to libgccjit
+      if: matrix.libgccjit_version.gcc != 'libgccjit12.so'
       run: |
           sudo dpkg --force-overwrite -i gcc-13/gcc-13.deb
           echo /usr/lib/ > gcc_path
@@ -81,18 +99,18 @@ jobs:
         #path: rust
         #key: ${{ runner.os }}-packages-${{ hashFiles('rust/.git/HEAD') }}
 
-    - name: Build
-      run: |
-        ./y.sh prepare --only-libcore
-        ./y.sh build
-        cargo test
-        ./clean_all.sh
-
-    - name: Prepare dependencies
+    - name: Git config
       run: |
         git config --global user.email "[email protected]"
         git config --global user.name "User"
-        ./y.sh prepare
+
+    - name: Prepare dependencies
+      if: matrix.libgccjit_version.gcc == 'libgccjit12.so'
+      run: ./y.sh prepare --libgccjit12-patches
+
+    - name: Prepare dependencies
+      if: matrix.libgccjit_version.gcc != 'libgccjit12.so'
+      run: ./y.sh prepare
 
     # Compile is a separate step, as the actions-rs/cargo action supports error annotations
     - name: Compile
@@ -107,5 +125,5 @@ jobs:
     - name: Run tests
       id: tests
       run: |
-        ./test.sh --release --clean --build-sysroot --test-failing-rustc | tee output_log
-        rg "test result" output_log >> $GITHUB_STEP_SUMMARY
+        ${{ matrix.libgccjit_version.env_extra }} ./test.sh --release --clean --build-sysroot --test-failing-rustc ${{ matrix.libgccjit_version.extra }} | tee output_log
+        rg --text "test result" output_log >> $GITHUB_STEP_SUMMARY

.github/workflows/gcc12.yml

@@ -11,6 +11,9 @@ env:
   # Enable backtraces for easier debugging
   RUST_BACKTRACE: 1
   TEST_FLAGS: "-Cpanic=abort -Zpanic-abort-tests"
+  # FIXME(antoyo): we need to set GCC_EXEC_PREFIX so that the linker can find the linker plugin.
+  # Not sure why it's not found otherwise.
+  GCC_EXEC_PREFIX: /usr/lib/gcc/
 
 jobs:
   build:
@@ -21,17 +24,15 @@ jobs:
       matrix:
         commands: [
           "--mini-tests",
-          # TODO(antoyo): re-enable those commands when the build with libgccjit 12 is fixed.
-          #"--std-tests",
+          "--std-tests",
           # FIXME: re-enable asm tests when GCC can emit in the right syntax.
           # "--asm-tests",
-          #"--test-libcore",
-          #"--extended-rand-tests",
-          #"--extended-regex-example-tests",
-          #"--extended-regex-tests",
-          #"--test-successful-rustc --nb-parts 2 --current-part 0",
-          #"--test-successful-rustc --nb-parts 2 --current-part 1",
-          #"--test-failing-rustc",
+          "--test-libcore",
+          "--extended-rand-tests",
+          "--extended-regex-example-tests",
+          "--extended-regex-tests",
+          "--test-successful-rustc --nb-parts 2 --current-part 0",
+          "--test-successful-rustc --nb-parts 2 --current-part 1",
         ]
 
     steps:
@@ -85,18 +86,16 @@ jobs:
 
     - name: Build
       run: |
-        ./y.sh prepare --only-libcore
-        # TODO(antoyo): build the sysroot when the build with libgccjit 12 is fixed.
-        #./y.sh build --no-default-features
-        # TODO(antoyo): run the tests when we can build the sysroot with libgccjit 12.
-        #cargo test --no-default-features
+        ./y.sh prepare --only-libcore --libgccjit12-patches
+        ./y.sh build --no-default-features --sysroot-panic-abort
+        cargo test --no-default-features
         ./clean_all.sh
 
     - name: Prepare dependencies
       run: |
         git config --global user.email "[email protected]"
         git config --global user.name "User"
-        ./y.sh prepare
+        ./y.sh prepare --libgccjit12-patches
 
     # Compile is a separate step, as the actions-rs/cargo action supports error annotations
     - name: Compile
@@ -108,9 +107,9 @@ jobs:
     - name: Add more failing tests for GCC 12
       run: cat failing-ui-tests12.txt >> failing-ui-tests.txt
 
+    - name: Add more failing tests because the sysroot is not compiled with LTO
+      run: cat failing-non-lto-tests.txt >> failing-ui-tests.txt
+
     - name: Run tests
       run: |
-        # TODO(antoyo): add --build-sysroot when the build with libgccjit 12 is fixed.
-        # FIXME(antoyo): we need to set GCC_EXEC_PREFIX so that the linker can find the linker plugin.
-        # Not sure why it's not found otherwise.
-        GCC_EXEC_PREFIX=/usr/lib/gcc/ ./test.sh --release --clean ${{ matrix.commands }} --no-default-features
+        ./test.sh --release --clean --build-sysroot ${{ matrix.commands }} --no-default-features

build_system/src/build.rs

@@ -11,6 +11,7 @@ use std::path::Path;
 struct BuildArg {
     codegen_release_channel: bool,
     sysroot_release_channel: bool,
+    sysroot_panic_abort: bool,
     flags: Vec<String>,
     gcc_path: String,
 }
@@ -32,6 +33,9 @@ impl BuildArg {
                 "--no-default-features" => {
                     build_arg.flags.push("--no-default-features".to_string());
                 }
+                "--sysroot-panic-abort" => {
+                    build_arg.sysroot_panic_abort = true;
+                },
                 "--features" => {
                     if let Some(arg) = args.next() {
                         build_arg.flags.push("--features".to_string());
@@ -77,6 +81,7 @@ impl BuildArg {
 
     --release              : Build codegen in release mode
     --release-sysroot      : Build sysroot in release mode
+    --sysroot-panic-abort  : Build the sysroot without unwinding support.
     --no-default-features  : Add `--no-default-features` flag
     --features [arg]       : Add a new feature [arg]
     --target-triple [arg]  : Set the target triple to [arg]
@@ -88,7 +93,7 @@ impl BuildArg {
 
 fn build_sysroot(
     env: &mut HashMap<String, String>,
-    release_mode: bool,
+    args: &BuildArg,
     config: &ConfigInfo,
 ) -> Result<(), String> {
     std::env::set_current_dir("build_sysroot")
@@ -138,15 +143,18 @@ fn build_sysroot(
     let _ = fs::remove_dir_all("sysroot");
 
     // Builds libs
-    let channel = if release_mode {
-        let rustflags = env
-            .get("RUSTFLAGS")
-            .cloned()
-            .unwrap_or_default();
-        env.insert(
-            "RUSTFLAGS".to_string(),
-            format!("{} -Zmir-opt-level=3", rustflags),
-        );
+    let mut rustflags = env
+        .get("RUSTFLAGS")
+        .cloned()
+        .unwrap_or_default();
+    if args.sysroot_panic_abort {
+        rustflags.push_str(" -Cpanic=abort -Zpanic-abort-tests");
+    }
+    env.insert(
+        "RUSTFLAGS".to_string(),
+        format!("{} -Zmir-opt-level=3", rustflags),
+    );
+    let channel = if args.sysroot_release_channel {
         run_command_with_output_and_env(
             &[
                 &"cargo",
@@ -224,7 +232,7 @@ fn build_codegen(args: &BuildArg) -> Result<(), String> {
     println!("[BUILD] sysroot");
     build_sysroot(
         &mut env,
-        args.sysroot_release_channel,
+        args,
         &config,
     )?;
     Ok(())

build_system/src/prepare.rs

@@ -4,7 +4,7 @@ use crate::utils::{cargo_install, git_clone, run_command, run_command_with_outpu
 use std::fs;
 use std::path::Path;
 
-fn prepare_libcore(sysroot_path: &Path, cross_compile: bool) -> Result<(), String> {
+fn prepare_libcore(sysroot_path: &Path, libgccjit12_patches: bool, cross_compile: bool) -> Result<(), String> {
     let rustc_path = match get_rustc_path() {
         Some(path) => path,
         None => return Err("`rustc` path not found".to_string()),
@@ -93,6 +93,16 @@ fn prepare_libcore(sysroot_path: &Path, cross_compile: bool) -> Result<(), Strin
             Ok(())
         })?;
     }
+    if libgccjit12_patches {
+        walk_dir(
+            "patches/libgccjit12",
+            |_| Ok(()),
+            |file_path: &Path| {
+                patches.push(file_path.to_path_buf());
+                Ok(())
+            },
+        )?;
+    }
     patches.sort();
     for file_path in patches {
         println!("[GIT] apply `{}`", file_path.display());
@@ -164,17 +174,20 @@ where
 struct PrepareArg {
     cross_compile: bool,
     only_libcore: bool,
+    libgccjit12_patches: bool,
 }
 
 impl PrepareArg {
     fn new() -> Result<Option<Self>, String> {
         let mut only_libcore = false;
         let mut cross_compile = false;
+        let mut libgccjit12_patches = false;
 
         for arg in std::env::args().skip(2) {
             match arg.as_str() {
                 "--only-libcore" => only_libcore = true,
                 "--cross" => cross_compile = true,
+                "--libgccjit12-patches" => libgccjit12_patches = true,
                 "--help" => {
                     Self::usage();
                     return Ok(None);
@@ -185,6 +198,7 @@ impl PrepareArg {
         Ok(Some(Self {
             cross_compile,
             only_libcore,
+            libgccjit12_patches,
         }))
     }
 
@@ -193,9 +207,10 @@ impl PrepareArg {
             r#"
 `prepare` command help:
 
-    --only-libcore  : Only setup libcore and don't clone other repositories
-    --cross         : Apply the patches needed to do cross-compilation
-    --help          : Show this help
+    --only-libcore           : Only setup libcore and don't clone other repositories
+    --cross                  : Apply the patches needed to do cross-compilation
+    --libgccjit12-patches    : Apply patches needed for libgccjit12
+    --help                   : Show this help
 "#
         )
     }
@@ -207,7 +222,7 @@ pub fn run() -> Result<(), String> {
         None => return Ok(()),
     };
     let sysroot_path = Path::new("build_sysroot");
-    prepare_libcore(sysroot_path, args.cross_compile)?;
+    prepare_libcore(sysroot_path, args.libgccjit12_patches, args.cross_compile)?;
 
     if !args.only_libcore {
         cargo_install("hyperfine")?;

failing-ui-tests12.txt

@@ -19,15 +19,12 @@ tests/ui/simd/intrinsic/generic-reduction-pass.rs
 tests/ui/simd/intrinsic/generic-select-pass.rs
 tests/ui/simd/intrinsic/inlining-issue67557-ice.rs
 tests/ui/simd/intrinsic/inlining-issue67557.rs
-tests/ui/simd/monomorphize-shuffle-index.rs
 tests/ui/simd/shuffle.rs
 tests/ui/simd/simd-bitmask.rs
-tests/ui/generator/resume-after-return.rs
 tests/ui/iterators/iter-step-overflow-debug.rs
-tests/ui/macros/rfc-2011-nicer-assert-messages/all-expr-kinds.rs
 tests/ui/numbers-arithmetic/next-power-of-two-overflow-debug.rs
 tests/ui/privacy/reachable-unnameable-items.rs
-tests/ui/rfc-1937-termination-trait/termination-trait-in-test.rs
+tests/ui/rfcs/rfc-1937-termination-trait/termination-trait-in-test.rs
 tests/ui/async-await/async-fn-size-moved-locals.rs
 tests/ui/async-await/async-fn-size-uninit-locals.rs
 tests/ui/cfg/cfg-panic.rs
@@ -38,3 +35,6 @@ tests/ui/simd/issue-85915-simd-ptrs.rs
 tests/ui/issues/issue-68010-large-zst-consts.rs
 tests/ui/rust-2018/proc-macro-crate-in-paths.rs
 tests/ui/target-feature/missing-plusminus.rs
+tests/ui/sse2.rs
+tests/ui/codegen/issue-79865-llvm-miscompile.rs
+tests/ui/intrinsics/intrinsics-integer.rs

patches/libgccjit12/0001-core-Disable-portable-simd-test.patch

@@ -0,0 +1,32 @@
+From 7bcd24ec6d4a96121874cb1ae5a23ea274aeff34 Mon Sep 17 00:00:00 2001
+From: None <[email protected]>
+Date: Thu, 19 Oct 2023 13:12:51 -0400
+Subject: [PATCH] [core] Disable portable-simd test
+
+---
+ library/core/tests/lib.rs | 2 --
+ 1 file changed, 2 deletions(-)
+
+diff --git a/library/core/tests/lib.rs b/library/core/tests/lib.rs
+index 5814ed4..194ad4c 100644
+--- a/library/core/tests/lib.rs
++++ b/library/core/tests/lib.rs
+@@ -90,7 +90,6 @@
+ #![feature(unwrap_infallible)]
+ #![feature(pointer_byte_offsets)]
+ #![feature(pointer_is_aligned)]
+-#![feature(portable_simd)]
+ #![feature(ptr_metadata)]
+ #![feature(lazy_cell)]
+ #![feature(unsized_tuple_coercion)]
+@@ -157,7 +156,6 @@ mod pin;
+ mod pin_macro;
+ mod ptr;
+ mod result;
+-mod simd;
+ mod slice;
+ mod str;
+ mod str_lossy;
+-- 
+2.42.0
+

src/intrinsic/llvm.rs

@@ -432,15 +432,21 @@ pub fn ignore_arg_cast(func_name: &str, index: usize, args_len: usize) -> bool {
 
 #[cfg(not(feature="master"))]
 pub fn intrinsic<'gcc, 'tcx>(name: &str, cx: &CodegenCx<'gcc, 'tcx>) -> Function<'gcc> {
-    match name {
-        "llvm.x86.xgetbv" | "llvm.x86.sse2.pause" => {
-            let gcc_name = "__builtin_trap";
-            let func = cx.context.get_builtin_function(gcc_name);
-            cx.functions.borrow_mut().insert(gcc_name.to_string(), func);
-            return func;
-        },
-        _ => unimplemented!("unsupported LLVM intrinsic {}", name),
-    }
+    let gcc_name =
+        match name {
+            "llvm.x86.sse2.pause" => {
+                // NOTE: pause is only a hint, so we use a dummy built-in because target built-ins
+                // are not supported in libgccjit 12.
+                "__builtin_inff"
+            },
+            "llvm.x86.xgetbv" => {
+                "__builtin_trap"
+            },
+            _ => unimplemented!("unsupported LLVM intrinsic {}", name),
+        };
+    let func = cx.context.get_builtin_function(gcc_name);
+    cx.functions.borrow_mut().insert(gcc_name.to_string(), func);
+    return func;
 }
 
 #[cfg(feature="master")]