| // min-llvm-version: 11.0.1 |
| // revisions: x86_64 i686 |
| // assembly-output: emit-asm |
| //[x86_64] compile-flags: --target x86_64-unknown-linux-gnu |
| //[i686] compile-flags: --target i686-unknown-linux-gnu |
| // compile-flags: -C llvm-args=--x86-asm-syntax=intel |
| |
| #![feature(no_core, lang_items)] |
| #![crate_type = "lib"] |
| #![no_core] |
| |
| #[lang = "sized"] |
| trait Sized {} |
| #[lang = "copy"] |
| trait Copy {} |
| |
| impl Copy for u8 {} |
| |
| // 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([u8; 8192])) { |
| // CHECK-NOT: __rust_probestack |
| // x86_64: sub rsp, 4096 |
| // i686: sub esp, 4096 |
| let a = [x; 8192]; |
| f(a); |
| } |
| |
| // 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 |
| let a = [x; 65536]; |
| f(a); |
| } |