rust/tests/codegen/repr/transparent-struct-ptr.rs

//@ revisions: i686-linux i686-freebsd x64-linux x64-apple wasm32
//@ compile-flags: -O -C no-prepopulate-passes

//@[i686-linux] compile-flags: --target i686-unknown-linux-gnu
//@[i686-linux] needs-llvm-components: x86
//@[i686-freebsd] compile-flags: --target i686-unknown-freebsd
//@[i686-freebsd] needs-llvm-components: x86
//@[x64-linux] compile-flags: --target x86_64-unknown-linux-gnu
//@[x64-linux] needs-llvm-components: x86
//@[x64-apple] compile-flags: --target x86_64-apple-darwin
//@[x64-apple] needs-llvm-components: x86
//@[wasm32] compile-flags: --target wasm32-wasi
//@[wasm32] needs-llvm-components: webassembly

// See ./transparent.rs
// Some platforms pass large aggregates using immediate arrays in LLVMIR
// Other platforms pass large aggregates using struct pointer in LLVMIR
// This covers the "struct pointer" case.

#![feature(no_core, lang_items, transparent_unions)]
#![crate_type = "lib"]
#![no_std]
#![no_core]

#[lang="sized"] trait Sized { }
#[lang="freeze"] trait Freeze { }
#[lang="copy"] trait Copy { }

impl Copy for [u32; 16] {}
impl Copy for BigS {}
impl Copy for BigU {}


#[repr(C)]
pub struct BigS([u32; 16]);

#[repr(transparent)]
pub struct TsBigS(BigS);

#[repr(transparent)]
pub union TuBigS {
    field: BigS,
}

#[repr(transparent)]
pub enum TeBigS {
    Variant(BigS),
}

// CHECK: define{{.*}}void @test_BigS(ptr [[BIGS_RET_ATTRS1:.*]] sret([64 x i8]) [[BIGS_RET_ATTRS2:.*]], ptr [[BIGS_ARG_ATTRS1:.*]] byval([64 x i8]) [[BIGS_ARG_ATTRS2:.*]])
#[no_mangle]
pub extern "C" fn test_BigS(_: BigS) -> BigS { loop {} }

// CHECK: define{{.*}}void @test_TsBigS(ptr [[BIGS_RET_ATTRS1]] sret([64 x i8]) [[BIGS_RET_ATTRS2]], ptr [[BIGS_ARG_ATTRS1]] byval([64 x i8]) [[BIGS_ARG_ATTRS2:.*]])
#[no_mangle]
pub extern "C" fn test_TsBigS(_: TsBigS) -> TsBigS { loop {} }

// CHECK: define{{.*}}void @test_TuBigS(ptr [[BIGS_RET_ATTRS1]] sret([64 x i8]) [[BIGS_RET_ATTRS2]], ptr [[BIGS_ARG_ATTRS1]] byval([64 x i8]) [[BIGS_ARG_ATTRS2:.*]])
#[no_mangle]
pub extern "C" fn test_TuBigS(_: TuBigS) -> TuBigS { loop {} }

// CHECK: define{{.*}}void @test_TeBigS(ptr [[BIGS_RET_ATTRS1]] sret([64 x i8]) [[BIGS_RET_ATTRS2]], ptr [[BIGS_ARG_ATTRS1]] byval([64 x i8]) [[BIGS_ARG_ATTRS2]])
#[no_mangle]
pub extern "C" fn test_TeBigS(_: TeBigS) -> TeBigS { loop {} }


#[repr(C)]
pub union BigU {
    foo: [u32; 16],
}

#[repr(transparent)]
pub struct TsBigU(BigU);

#[repr(transparent)]
pub union TuBigU {
    field: BigU,
}

#[repr(transparent)]
pub enum TeBigU {
    Variant(BigU),
}

// CHECK: define{{.*}}void @test_BigU(ptr [[BIGU_RET_ATTRS1:.*]] sret([64 x i8]) [[BIGU_RET_ATTRS2:.*]], ptr [[BIGU_ARG_ATTRS1:.*]] byval([64 x i8]) [[BIGU_ARG_ATTRS2:.*]])
#[no_mangle]
pub extern "C" fn test_BigU(_: BigU) -> BigU { loop {} }

// CHECK: define{{.*}}void @test_TsBigU(ptr [[BIGU_RET_ATTRS1:.*]] sret([64 x i8]) [[BIGU_RET_ATTRS2:.*]], ptr [[BIGU_ARG_ATTRS1]] byval([64 x i8]) [[BIGU_ARG_ATTRS2]])
#[no_mangle]
pub extern "C" fn test_TsBigU(_: TsBigU) -> TsBigU { loop {} }

// CHECK: define{{.*}}void @test_TuBigU(ptr [[BIGU_RET_ATTRS1]] sret([64 x i8]) [[BIGU_RET_ATTRS2:.*]], ptr [[BIGU_ARG_ATTRS1]] byval([64 x i8]) [[BIGU_ARG_ATTRS2]])
#[no_mangle]
pub extern "C" fn test_TuBigU(_: TuBigU) -> TuBigU { loop {} }

// CHECK: define{{.*}}void @test_TeBigU(ptr [[BIGU_RET_ATTRS1]] sret([64 x i8]) [[BIGU_RET_ATTRS2:.*]], ptr [[BIGU_ARG_ATTRS1]] byval([64 x i8]) [[BIGU_ARG_ATTRS2]])
#[no_mangle]
pub extern "C" fn test_TeBigU(_: TeBigU) -> TeBigU { loop {} }