5f3dc8b7b2
The x86_64 SysV ABI should use exact sizes for small structs passed in registers, i.e. a struct that occupies 3 bytes should use an i24, instead of the i32 it currently uses. Refs #45543
40 lines
864 B
Rust
40 lines
864 B
Rust
// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// only-x86_64
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// compile-flags: -C no-prepopulate-passes
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#![crate_type = "lib"]
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pub struct S24 {
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a: i8,
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b: i8,
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c: i8,
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}
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pub struct S48 {
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a: i16,
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b: i16,
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c: i8,
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}
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// CHECK: i24 @struct_24_bits(i24
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#[no_mangle]
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pub extern "sysv64" fn struct_24_bits(a: S24) -> S24 {
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a
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}
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// CHECK: i48 @struct_48_bits(i48
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#[no_mangle]
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pub extern "sysv64" fn struct_48_bits(a: S48) -> S48 {
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a
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}
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