rust/tests/assembly/static-relocation-model.rs

// revisions: x64 A64 ppc64le
// assembly-output: emit-asm
// [x64] compile-flags: --target x86_64-unknown-linux-gnu -Crelocation-model=static
// [x64] needs-llvm-components: x86
// [A64] compile-flags: --target aarch64-unknown-linux-gnu -Crelocation-model=static
// [A64] needs-llvm-components: aarch64
// [ppc64le] compile-flags: --target powerpc64le-unknown-linux-gnu -Crelocation-model=static
// [ppc64le] needs-llvm-components: powerpc
// ignore-debug: alignment checks insert panics that we don't have a lang item for

#![feature(no_core, lang_items)]
#![no_core]
#![crate_type="rlib"]

#[lang="sized"]
trait Sized {}

#[lang="copy"]
trait Copy {}

#[lang="sync"]
trait Sync {}

#[lang = "drop_in_place"]
fn drop_in_place<T>(_: *mut T) {}

impl Copy for u8 {}
impl Sync for u8 {}

#[no_mangle]
pub static PIERIS: u8 = 42;

extern "C" {
    static EXOCHORDA: *mut u8;

    fn chaenomeles();
}

// CHECK-LABEL: banana:
// On the next line LLVM 14 produces a `movb`, whereas LLVM 15+ produces a `movzbl`.
// x64: {{movb|movzbl}}   chaenomeles{{(\(%[a-z0-9]+\))?}}, %{{[a-z0-9]+}}
// A64:      adrp    [[REG:[a-z0-9]+]], chaenomeles
// A64-NEXT: ldrb    {{[a-z0-9]+}}, {{\[}}[[REG]], :lo12:chaenomeles]
#[no_mangle]
pub fn banana() -> u8 {
    unsafe {
        *(chaenomeles as *mut u8)
    }
}

// CHECK-LABEL: peach:
// x64: {{movb|movzbl}}    banana{{(\(%[a-z0-9]+\))?}}, %{{[a-z0-9]+}}
// A64:      adrp    [[REG2:[a-z0-9]+]], banana
// A64-NEXT: ldrb    {{[a-z0-9]+}}, {{\[}}[[REG2]], :lo12:banana]
#[no_mangle]
pub fn peach() -> u8 {
    unsafe {
        *(banana as *mut u8)
    }
}

// CHECK-LABEL: mango:
// x64:      movq    EXOCHORDA{{(\(%[a-z0-9]+\))?}}, %[[REG:[a-z0-9]+]]
// x64-NEXT: {{movb|movzbl}}   (%[[REG]]), %{{[a-z0-9]+}}
// A64:      adrp    [[REG2:[a-z0-9]+]], EXOCHORDA
// A64-NEXT: ldr     {{[a-z0-9]+}}, {{\[}}[[REG2]], :lo12:EXOCHORDA]
#[no_mangle]
pub fn mango() -> u8 {
    unsafe {
        *EXOCHORDA
    }
}

// CHECK-LABEL: orange:
// x64: mov{{l|absq}}    $PIERIS, %{{[a-z0-9]+}}
// A64:      adrp    [[REG2:[a-z0-9]+]], PIERIS
// A64-NEXT: add     {{[a-z0-9]+}}, [[REG2]], :lo12:PIERIS
#[no_mangle]
pub fn orange() -> &'static u8 {
    &PIERIS
}

// For ppc64 we need to make sure to generate TOC entries even with the static relocation model
// ppc64le: .tc chaenomeles[TC],chaenomeles
// ppc64le: .tc banana[TC],banana
// ppc64le: .tc EXOCHORDA[TC],EXOCHORDA
// ppc64le: .tc PIERIS[TC],PIERIS