dnrops
/
rust
mirror of https://github.com/rust-lang/rust.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Test codegen of atomic compare-exchange with additional memory orderings 

* Add a test for atomic operations introduced in #97423 & #98383.
* Add a test for fallback code generation strategy used on LLVM 12
  introduced in #98385. Use a separate test case instead of a revision
  system since test will be gone once LLVM 12 is no longer supported.
This commit is contained in:
Tomasz Miąsko 2022-07-18 00:00:00 +00:00
parent d60d88fe5c
commit 8ebaf14d0c
2 changed files with 109 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

84
src/test/codegen/atomic-operations-llvm-12.rs Normal file
View File

@ -0,0 +1,84 @@
// Code generation of atomic operations for LLVM 12
// ignore-llvm-version: 13 - 99
// compile-flags: -O
#![crate_type = "lib"]
use std::sync::atomic::{AtomicI32, Ordering::*};
// CHECK-LABEL: @compare_exchange
#[no_mangle]
pub fn compare_exchange(a: &AtomicI32) {
// CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 10 monotonic monotonic
// CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 11 acquire acquire
// CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 12 seq_cst seq_cst
let _ = a.compare_exchange(0, 10, Relaxed, Relaxed);
let _ = a.compare_exchange(0, 11, Relaxed, Acquire);
let _ = a.compare_exchange(0, 12, Relaxed, SeqCst);
// CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 20 release monotonic
// CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 21 acq_rel acquire
// CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 22 seq_cst seq_cst
let _ = a.compare_exchange(0, 20, Release, Relaxed);
let _ = a.compare_exchange(0, 21, Release, Acquire);
let _ = a.compare_exchange(0, 22, Release, SeqCst);
// CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 30 acquire monotonic
// CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 31 acquire acquire
// CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 32 seq_cst seq_cst
let _ = a.compare_exchange(0, 30, Acquire, Relaxed);
let _ = a.compare_exchange(0, 31, Acquire, Acquire);
let _ = a.compare_exchange(0, 32, Acquire, SeqCst);
// CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 40 acq_rel monotonic
// CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 41 acq_rel acquire
// CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 42 seq_cst seq_cst
let _ = a.compare_exchange(0, 40, AcqRel, Relaxed);
let _ = a.compare_exchange(0, 41, AcqRel, Acquire);
let _ = a.compare_exchange(0, 42, AcqRel, SeqCst);
// CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 50 seq_cst monotonic
// CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 51 seq_cst acquire
// CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 52 seq_cst seq_cst
let _ = a.compare_exchange(0, 50, SeqCst, Relaxed);
let _ = a.compare_exchange(0, 51, SeqCst, Acquire);
let _ = a.compare_exchange(0, 52, SeqCst, SeqCst);
}
// CHECK-LABEL: @compare_exchange_weak
#[no_mangle]
pub fn compare_exchange_weak(w: &AtomicI32) {
// CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 10 monotonic monotonic
// CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 11 acquire acquire
// CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 12 seq_cst seq_cst
let _ = w.compare_exchange_weak(1, 10, Relaxed, Relaxed);
let _ = w.compare_exchange_weak(1, 11, Relaxed, Acquire);
let _ = w.compare_exchange_weak(1, 12, Relaxed, SeqCst);
// CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 20 release monotonic
// CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 21 acq_rel acquire
// CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 22 seq_cst seq_cst
let _ = w.compare_exchange_weak(1, 20, Release, Relaxed);
let _ = w.compare_exchange_weak(1, 21, Release, Acquire);
let _ = w.compare_exchange_weak(1, 22, Release, SeqCst);
// CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 30 acquire monotonic
// CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 31 acquire acquire
// CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 32 seq_cst seq_cst
let _ = w.compare_exchange_weak(1, 30, Acquire, Relaxed);
let _ = w.compare_exchange_weak(1, 31, Acquire, Acquire);
let _ = w.compare_exchange_weak(1, 32, Acquire, SeqCst);
// CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 40 acq_rel monotonic
// CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 41 acq_rel acquire
// CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 42 seq_cst seq_cst
let _ = w.compare_exchange_weak(1, 40, AcqRel, Relaxed);
let _ = w.compare_exchange_weak(1, 41, AcqRel, Acquire);
let _ = w.compare_exchange_weak(1, 42, AcqRel, SeqCst);
// CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 50 seq_cst monotonic
// CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 51 seq_cst acquire
// CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 52 seq_cst seq_cst
let _ = w.compare_exchange_weak(1, 50, SeqCst, Relaxed);
let _ = w.compare_exchange_weak(1, 51, SeqCst, Acquire);
let _ = w.compare_exchange_weak(1, 52, SeqCst, SeqCst);
}

26
src/test/codegen/atomic-operations.rs
View File

@ -1,5 +1,5 @@
// Code generation of atomic operations.
//
// min-llvm-version: 13.0
// compile-flags: -O
#![crate_type = "lib"]
@ -9,20 +9,32 @@ use std::sync::atomic::{AtomicI32, Ordering::*};
#[no_mangle]
pub fn compare_exchange(a: &AtomicI32) {
// CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 10 monotonic monotonic
// CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 11 monotonic acquire
// CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 12 monotonic seq_cst
let _ = a.compare_exchange(0, 10, Relaxed, Relaxed);
let _ = a.compare_exchange(0, 11, Relaxed, Acquire);
let _ = a.compare_exchange(0, 12, Relaxed, SeqCst);
// CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 20 release monotonic
// CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 21 release acquire
// CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 22 release seq_cst
let _ = a.compare_exchange(0, 20, Release, Relaxed);
let _ = a.compare_exchange(0, 21, Release, Acquire);
let _ = a.compare_exchange(0, 22, Release, SeqCst);
// CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 30 acquire monotonic
// CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 31 acquire acquire
// CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 32 acquire seq_cst
let _ = a.compare_exchange(0, 30, Acquire, Relaxed);
let _ = a.compare_exchange(0, 31, Acquire, Acquire);
let _ = a.compare_exchange(0, 32, Acquire, SeqCst);
// CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 40 acq_rel monotonic
// CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 41 acq_rel acquire
// CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 42 acq_rel seq_cst
let _ = a.compare_exchange(0, 40, AcqRel, Relaxed);
let _ = a.compare_exchange(0, 41, AcqRel, Acquire);
let _ = a.compare_exchange(0, 42, AcqRel, SeqCst);
// CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 50 seq_cst monotonic
// CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 51 seq_cst acquire
@ -36,20 +48,32 @@ pub fn compare_exchange(a: &AtomicI32) {
#[no_mangle]
pub fn compare_exchange_weak(w: &AtomicI32) {
// CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 10 monotonic monotonic
// CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 11 monotonic acquire
// CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 12 monotonic seq_cst
let _ = w.compare_exchange_weak(1, 10, Relaxed, Relaxed);
let _ = w.compare_exchange_weak(1, 11, Relaxed, Acquire);
let _ = w.compare_exchange_weak(1, 12, Relaxed, SeqCst);
// CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 20 release monotonic
// CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 21 release acquire
// CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 22 release seq_cst
let _ = w.compare_exchange_weak(1, 20, Release, Relaxed);
let _ = w.compare_exchange_weak(1, 21, Release, Acquire);
let _ = w.compare_exchange_weak(1, 22, Release, SeqCst);
// CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 30 acquire monotonic
// CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 31 acquire acquire
// CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 32 acquire seq_cst
let _ = w.compare_exchange_weak(1, 30, Acquire, Relaxed);
let _ = w.compare_exchange_weak(1, 31, Acquire, Acquire);
let _ = w.compare_exchange_weak(1, 32, Acquire, SeqCst);
// CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 40 acq_rel monotonic
// CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 41 acq_rel acquire
// CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 42 acq_rel seq_cst
let _ = w.compare_exchange_weak(1, 40, AcqRel, Relaxed);
let _ = w.compare_exchange_weak(1, 41, AcqRel, Acquire);
let _ = w.compare_exchange_weak(1, 42, AcqRel, SeqCst);
// CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 50 seq_cst monotonic
// CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 51 seq_cst acquire