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Auto merge of #99409 - tmiasko:atomic-tests, r=m-ou-se
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.
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| // Code generation of atomic operations for LLVM 12 | ||
| // ignore-llvm-version: 13 - 99 | ||
| // compile-flags: -O | ||
| #![crate_type = "lib"] | ||
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| use std::sync::atomic::{AtomicI32, Ordering::*}; | ||
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| // 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); | ||
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| // 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); | ||
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| // 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); | ||
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| // 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); | ||
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| // 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); | ||
| } | ||
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| // 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); | ||
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| // 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); | ||
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| // 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); | ||
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| // 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); | ||
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| // 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); | ||
| } |
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