diff options
Diffstat (limited to 'compiler/rustc_codegen_cranelift/src/lib.rs')
| -rw-r--r-- | compiler/rustc_codegen_cranelift/src/lib.rs | 43 |
1 files changed, 37 insertions, 6 deletions
diff --git a/compiler/rustc_codegen_cranelift/src/lib.rs b/compiler/rustc_codegen_cranelift/src/lib.rs index ab09a6f8b38..8ef623cde00 100644 --- a/compiler/rustc_codegen_cranelift/src/lib.rs +++ b/compiler/rustc_codegen_cranelift/src/lib.rs @@ -6,6 +6,9 @@ #![cfg_attr(doc, feature(rustdoc_internals))] // Note: please avoid adding other feature gates where possible #![feature(rustc_private)] +// Only used to define intrinsics in `compiler_builtins.rs`. +#![feature(f16)] +#![feature(f128)] // Note: please avoid adding other feature gates where possible #![warn(rust_2018_idioms)] #![warn(unreachable_pub)] @@ -57,6 +60,7 @@ mod allocator; mod analyze; mod base; mod cast; +mod codegen_f16_f128; mod codegen_i128; mod common; mod compiler_builtins; @@ -76,7 +80,6 @@ mod optimize; mod pointer; mod pretty_clif; mod toolchain; -mod trap; mod unsize; mod unwind_module; mod value_and_place; @@ -198,14 +201,36 @@ impl CodegenBackend for CraneliftCodegenBackend { // FIXME do `unstable_target_features` properly let unstable_target_features = target_features.clone(); + // FIXME(f16_f128): LLVM 20 (currently used by `rustc`) passes `f128` in XMM registers on + // Windows, whereas LLVM 21+ and Cranelift pass it indirectly. This means that `f128` won't + // work when linking against a LLVM-built sysroot. + let has_reliable_f128 = !sess.target.is_like_windows; + let has_reliable_f16 = match &*sess.target.arch { + // FIXME(f16_f128): LLVM 20 does not support `f16` on s390x, meaning the required + // builtins are not available in `compiler-builtins`. + "s390x" => false, + // FIXME(f16_f128): `rustc_codegen_llvm` currently disables support on Windows GNU + // targets due to GCC using a different ABI than LLVM. Therefore `f16` won't be + // available when using a LLVM-built sysroot. + "x86_64" + if sess.target.os == "windows" + && sess.target.env == "gnu" + && sess.target.abi != "llvm" => + { + false + } + _ => true, + }; + TargetConfig { target_features, unstable_target_features, - // Cranelift does not yet support f16 or f128 - has_reliable_f16: false, - has_reliable_f16_math: false, - has_reliable_f128: false, - has_reliable_f128_math: false, + // `rustc_codegen_cranelift` polyfills functionality not yet + // available in Cranelift. + has_reliable_f16, + has_reliable_f16_math: has_reliable_f16, + has_reliable_f128, + has_reliable_f128_math: has_reliable_f128, } } @@ -290,6 +315,12 @@ fn build_isa(sess: &Session, jit: bool) -> Arc<dyn TargetIsa + 'static> { flags_builder.set("enable_llvm_abi_extensions", "true").unwrap(); + if let Some(align) = sess.opts.unstable_opts.min_function_alignment { + flags_builder + .set("log2_min_function_alignment", &align.bytes().ilog2().to_string()) + .unwrap(); + } + use rustc_session::config::OptLevel; match sess.opts.optimize { OptLevel::No => { |