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| author | Scott McMurray <scottmcm@users.noreply.github.com> | 2023-08-26 17:42:59 -0700 |
|---|---|---|
| committer | Scott McMurray <scottmcm@users.noreply.github.com> | 2023-08-26 17:42:59 -0700 |
| commit | 754f488d46fa33387c3dca3b08d3f3ec2fe02d3f (patch) | |
| tree | 0891bfc631224683cc918fe5ab976dfdba4241be /compiler/rustc_ty_utils/src/abi.rs | |
| parent | 22d41ae90facbffdef9115809e8b6c1f71ebbf7c (diff) | |
| download | rust-754f488d46fa33387c3dca3b08d3f3ec2fe02d3f.tar.gz rust-754f488d46fa33387c3dca3b08d3f3ec2fe02d3f.zip | |
Use `preserve_mostcc` for `extern "rust-cold"`
As experimentation in 115242 has shown looks better than `coldcc`. And *don't* use a different convention for cold on Windows, because that actually ends up making things worse. cc tracking issue 97544
Diffstat (limited to 'compiler/rustc_ty_utils/src/abi.rs')
| -rw-r--r-- | compiler/rustc_ty_utils/src/abi.rs | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/compiler/rustc_ty_utils/src/abi.rs b/compiler/rustc_ty_utils/src/abi.rs index 4d0b847533b..a03da41652c 100644 --- a/compiler/rustc_ty_utils/src/abi.rs +++ b/compiler/rustc_ty_utils/src/abi.rs @@ -172,7 +172,10 @@ 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, + + // This is intentionally not using `Conv::Cold`, as that has to preserve + // even SIMD registers, which is generally not a good trade-off. + RustCold => Conv::PreserveMost, // It's the ABI's job to select this, not ours. System { .. } => bug!("system abi should be selected elsewhere"), |