| //@ revisions: align16 align1024 |
| //@ compile-flags: -C no-prepopulate-passes -Z mir-opt-level=0 -Clink-dead-code |
| //@ [align16] compile-flags: -Zmin-function-alignment=16 |
| //@ [align1024] compile-flags: -Zmin-function-alignment=1024 |
| //@ ignore-wasm32 aligning functions is not currently supported on wasm (#143368) |
| |
| #![crate_type = "lib"] |
| // FIXME(#82232, #143834): temporarily renamed to mitigate `#[align]` nameres ambiguity |
| #![feature(rustc_attrs)] |
| #![feature(fn_align)] |
| |
| // Functions without explicit alignment use the global minimum. |
| // |
| // NOTE: this function deliberately has zero (0) attributes! That is to make sure that |
| // `-Zmin-function-alignment` is applied regardless of whether attributes are used. |
| // |
| // CHECK-LABEL: no_explicit_align |
| // align16: align 16 |
| // align1024: align 1024 |
| pub fn no_explicit_align() {} |
| |
| // CHECK-LABEL: @lower_align |
| // align16: align 16 |
| // align1024: align 1024 |
| #[no_mangle] |
| #[rustc_align(8)] |
| pub fn lower_align() {} |
| |
| // the higher value of min-function-alignment and the align attribute wins out |
| // |
| // CHECK-LABEL: @higher_align |
| // align16: align 32 |
| // align1024: align 1024 |
| #[no_mangle] |
| #[rustc_align(32)] |
| pub fn higher_align() {} |
| |
| // cold functions follow the same rules as other functions |
| // |
| // in GCC, the `-falign-functions` does not apply to cold functions, but |
| // `-Zmin-function-alignment` applies to all functions. |
| // |
| // CHECK-LABEL: @no_explicit_align_cold |
| // align16: align 16 |
| // align1024: align 1024 |
| #[no_mangle] |
| #[cold] |
| pub fn no_explicit_align_cold() {} |
