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Merge commit '979dcf8e2f213e4f4b645cb62e7fe9f4f2c0c785' into sync_cg_clif-2025-05-25

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bjorn3
2025-05-25 18:51:16 +00:00
parent 283db70ace 979dcf8e2f
commit 3816385b09
36 changed files with 1111 additions and 266 deletions
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43
compiler/rustc_codegen_cranelift/src/lib.rs
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@@ -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 => {