ci: Test -Z codegen-backend=cranelift

.github/.cspell/project-dictionary.txt

@@ -21,7 +21,6 @@ cinc
 cirruslabs
 clgr
 clidr
-clif
 cmovae
 cmovb
 cmovge

.github/workflows/ci.yml

@@ -81,6 +81,8 @@ jobs:
           - rust: nightly
           - rust: nightly
             flags: -C panic=abort -Z panic_abort_tests
+          - rust: nightly
+            flags: -Z codegen-backend=cranelift
           - rust: nightly
             os: macos-latest
           - rust: nightly
@@ -105,6 +107,9 @@ jobs:
             target: aarch64-unknown-linux-gnu
           - rust: nightly
             target: aarch64-unknown-linux-gnu
+          - rust: nightly
+            target: aarch64-unknown-linux-gnu
+            flags: -Z codegen-backend=cranelift
           - rust: nightly
             target: aarch64_be-unknown-linux-gnu
           - rust: stable
@@ -195,6 +200,9 @@ jobs:
             target: riscv64gc-unknown-linux-gnu
           - rust: nightly
             target: riscv64gc-unknown-linux-gnu
+          - rust: nightly
+            target: riscv64gc-unknown-linux-gnu
+            flags: -Z codegen-backend=cranelift
           - rust: nightly
             target: s390x-unknown-linux-gnu
           - rust: nightly-2023-05-09 # Rust 1.71, LLVM 16 (oldest version we can use asm_experimental_arch on this target)

portable-atomic-util/Cargo.toml

@@ -43,7 +43,7 @@ alloc = []
 # generic = []
 
 [dependencies]
-portable-atomic = { version = "1.3", path = "..", default-features = false, features = ["require-cas"] }
+portable-atomic = { version = "1.5.1", path = "..", default-features = false, features = ["require-cas"] }
 
 [lints]
 workspace = true

tools/test.sh

@@ -178,6 +178,16 @@ target_lower="${target//-/_}"
 target_lower="${target_lower//./_}"
 target_upper=$(tr '[:lower:]' '[:upper:]' <<<"${target_lower}")
 randomize_layout=' -Z randomize-layout'
+cranelift=''
+if [[ "${RUSTFLAGS:-}" =~ -Z( )?codegen-backend=cranelift ]]; then
+    cranelift='1'
+    rustup ${pre_args[@]+"${pre_args[@]}"} component add rustc-codegen-cranelift-preview &>/dev/null
+    # panic=unwind is not supported yet.
+    # https://github.com/rust-lang/rustc_codegen_cranelift#not-yet-supported
+    flags=' -C panic=abort -Z panic_abort_tests'
+    export RUSTFLAGS="${RUSTFLAGS:-}${flags}"
+    export RUSTDOCFLAGS="${RUSTDOCFLAGS:-}${flags}"
+fi
 
 case "${cmd}" in
     build)
@@ -231,9 +241,9 @@ run() {
         x_cargo test ${build_std[@]+"${build_std[@]}"} --release --tests "$@"
     fi
 
-    case "$(basename "${cargo}")" in
-        cargo-clif | cargo-clif.exe) return ;; # LTO is not supported
-    esac
+    if [[ -n "${cranelift}" ]]; then
+        return # LTO is not supported
+    fi
 
     # LTO + doctests is very slow on some platforms (probably related to the fact that they compile binaries for each example)
     CARGO_PROFILE_RELEASE_CODEGEN_UNITS=1 \