bjoernager/rust
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Add support for emitting functions with coldcc in LLVM

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The eventual goal is to try using this for things like the internal panicking stuff, to see whether it helps.
This commit is contained in:
Scott McMurray 2022-05-29 00:25:14 -07:00
parent 0acc4a3585
commit e90be842fb
12 changed files with 128 additions and 3 deletions
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3
compiler/rustc_middle/src/ty/layout.rs
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@ -2971,7 +2971,7 @@ pub fn fn_can_unwind<'tcx>(tcx: TyCtxt<'tcx>, fn_def_id: Option<DefId>, abi: Spe
| RustIntrinsic
| PlatformIntrinsic
| Unadjusted => false,
Rust | RustCall => tcx.sess.panic_strategy() == PanicStrategy::Unwind,
Rust | RustCall | RustCold => tcx.sess.panic_strategy() == PanicStrategy::Unwind,
}
}
@ -2980,6 +2980,7 @@ pub fn conv_from_spec_abi(tcx: TyCtxt<'_>, abi: SpecAbi) -> Conv {
use rustc_target::spec::abi::Abi::*;
match tcx.sess.target.adjust_abi(abi) {
RustIntrinsic | PlatformIntrinsic | Rust | RustCall => Conv::Rust,
RustCold => Conv::RustCold,
// It's the ABI's job to select this, not ours.
System { .. } => bug!("system abi should be selected elsewhere"),