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Rollup merge of #130432 - azhogin:azhogin/regparm, r=workingjubilee,pnkfelix

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rust_for_linux: -Zregparm=<N> commandline flag for X86 (#116972)

Command line flag `-Zregparm=<N>` for X86 (32-bit) for rust-for-linux: https://github.com/rust-lang/rust/issues/116972
Implemented in the similar way as fastcall/vectorcall support (args are marked InReg if fit).
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Jubilee 2024-10-21 20:32:00 -07:00 • committed by GitHub
commit fe2cbbd2d5
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18 changed files with 351 additions and 53 deletions
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16
compiler/rustc_middle/src/ty/layout.rs
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@ -21,7 +21,9 @@ use rustc_span::{DUMMY_SP, ErrorGuaranteed, Span};
use rustc_target::abi::call::FnAbi;
use rustc_target::abi::{FieldIdx, TyAbiInterface, VariantIdx, call};
use rustc_target::spec::abi::Abi as SpecAbi;
use rustc_target::spec::{HasTargetSpec, HasWasmCAbiOpt, PanicStrategy, Target, WasmCAbi};
use rustc_target::spec::{
HasTargetSpec, HasWasmCAbiOpt, HasX86AbiOpt, PanicStrategy, Target, WasmCAbi, X86Abi,
};
use tracing::debug;
use {rustc_abi as abi, rustc_hir as hir};
@ -544,6 +546,12 @@ impl<'tcx> HasWasmCAbiOpt for TyCtxt<'tcx> {
}
}
impl<'tcx> HasX86AbiOpt for TyCtxt<'tcx> {
fn x86_abi_opt(&self) -> X86Abi {
X86Abi { regparm: self.sess.opts.unstable_opts.regparm }
}
}
impl<'tcx> HasTyCtxt<'tcx> for TyCtxt<'tcx> {
#[inline]
fn tcx(&self) -> TyCtxt<'tcx> {
@ -595,6 +603,12 @@ impl<'tcx> HasWasmCAbiOpt for LayoutCx<'tcx> {
}
}
impl<'tcx> HasX86AbiOpt for LayoutCx<'tcx> {
fn x86_abi_opt(&self) -> X86Abi {
self.calc.cx.x86_abi_opt()
}
}
impl<'tcx> HasTyCtxt<'tcx> for LayoutCx<'tcx> {
fn tcx(&self) -> TyCtxt<'tcx> {
self.calc.cx