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rust/tests/codegen/cold-call-declare-and-call.rs

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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
2023-08-27 08:42:59 +08:00
//@ revisions: NORMAL WINDOWS
Add support for emitting functions with `coldcc` in LLVM The eventual goal is to try using this for things like the internal panicking stuff, to see whether it helps.
2022-05-29 15:25:14 +08:00
//@ compile-flags: -C no-prepopulate-passes
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
2023-08-27 08:42:59 +08:00
//@[NORMAL] ignore-windows
//@[WINDOWS] only-windows
//@[WINDOWS] only-x86_64
Add support for emitting functions with `coldcc` in LLVM The eventual goal is to try using this for things like the internal panicking stuff, to see whether it helps.
2022-05-29 15:25:14 +08:00
#![crate_type = "lib"]
#![feature(rust_cold_cc)]
Fix the coldcc codegen test on wasm32
2022-06-06 07:02:10 +08:00
// wasm marks the definition as `dso_local`, so allow that as optional.
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
2023-08-27 08:42:59 +08:00
// NORMAL: define{{( dso_local)?}} preserve_mostcc void @this_should_never_happen(i16
// NORMAL: call preserve_mostcc void @this_should_never_happen(i16
// See the comment in `Target::adjust_abi` for why this differs
// WINDOWS: define void @this_should_never_happen(i16
// WINDOWS: call void @this_should_never_happen(i16
Add support for emitting functions with `coldcc` in LLVM The eventual goal is to try using this for things like the internal panicking stuff, to see whether it helps.
2022-05-29 15:25:14 +08:00
#[no_mangle]
pub extern "rust-cold" fn this_should_never_happen(x: u16) {}
pub fn do_things(x: u16) {
if x == 12345 {
this_should_never_happen(54321);
}
}