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//@ add-core-stubs
//@ revisions: x86_64 i686 aarch64
//@ assembly-output: emit-asm
//@[x86_64] compile-flags: --target x86_64-unknown-linux-gnu -C llvm-args=-x86-asm-syntax=intel
//@[x86_64] needs-llvm-components: x86
//@[i686] compile-flags: --target i686-unknown-linux-gnu -C llvm-args=-x86-asm-syntax=intel
//@[i686] needs-llvm-components: x86
//@[aarch64] compile-flags: --target aarch64-unknown-linux-gnu
//@[aarch64] needs-llvm-components: aarch64
#![feature(no_core, lang_items)]
#![crate_type = "lib"]
#![no_core]
extern crate minicore;
use minicore::*;
// Check that inline-asm stack probes are generated correctly.
// To avoid making this test fragile to slight asm changes,
// we only check that the stack pointer is decremented by a page at a time,
// instead of matching the whole probe sequence.
// CHECK-LABEL: small_stack_probe:
#[no_mangle]
pub fn small_stack_probe(x: u8, f: fn(&mut [u8; 8192])) {
// CHECK-NOT: __rust_probestack
// x86_64: sub rsp, 4096
// i686: sub esp, 4096
// aarch64: sub sp, sp, #1, lsl #12
f(&mut [x; 8192]);
}
// CHECK-LABEL: big_stack_probe:
#[no_mangle]
pub fn big_stack_probe(x: u8, f: fn(&[u8; 65536])) {
// CHECK-NOT: __rust_probestack
// x86_64: sub rsp, 4096
// i686: sub esp, 4096
// aarch64: sub sp, sp, #1, lsl #12
f(&mut [x; 65536]);
}
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