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1fdf2b5620
Right now it's used for functions with `fn_align`, in the future it will get more uses (statics, struct fields, etc.)
44 lines
1.1 KiB
Rust
44 lines
1.1 KiB
Rust
//@ revisions: align16 align1024
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//@ compile-flags: -C no-prepopulate-passes -Z mir-opt-level=0
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//@ [align16] compile-flags: -Zmin-function-alignment=16
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//@ [align1024] compile-flags: -Zmin-function-alignment=1024
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#![crate_type = "lib"]
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#![feature(fn_align)]
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// functions without explicit alignment use the global minimum
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//
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// CHECK-LABEL: @no_explicit_align
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// align16: align 16
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// align1024: align 1024
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#[no_mangle]
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pub fn no_explicit_align() {}
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// CHECK-LABEL: @lower_align
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// align16: align 16
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// align1024: align 1024
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#[no_mangle]
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#[align(8)]
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pub fn lower_align() {}
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// the higher value of min-function-alignment and the align attribute wins out
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//
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// CHECK-LABEL: @higher_align
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// align16: align 32
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// align1024: align 1024
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#[no_mangle]
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#[align(32)]
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pub fn higher_align() {}
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// cold functions follow the same rules as other functions
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//
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// in GCC, the `-falign-functions` does not apply to cold functions, but
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// `-Zmin-function-alignment` applies to all functions.
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//
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// CHECK-LABEL: @no_explicit_align_cold
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// align16: align 16
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// align1024: align 1024
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#[no_mangle]
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#[cold]
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pub fn no_explicit_align_cold() {}
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