diff options
Diffstat (limited to 'test/CodeGen/ARM/atomic-op.ll')
| -rw-r--r-- | test/CodeGen/ARM/atomic-op.ll | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/atomic-op.ll b/test/CodeGen/ARM/atomic-op.ll index 9a79c9f..ac8e949 100644 --- a/test/CodeGen/ARM/atomic-op.ll +++ b/test/CodeGen/ARM/atomic-op.ll @@ -194,3 +194,40 @@ entry: %0 = atomicrmw add i32* %p, i32 1 monotonic ret i32 %0 } + +define i32 @test_cmpxchg_fail_order(i32 *%addr, i32 %desired, i32 %new) { +; CHECK-LABEL: test_cmpxchg_fail_order: + + %oldval = cmpxchg i32* %addr, i32 %desired, i32 %new seq_cst monotonic +; CHECK: dmb ish +; CHECK: [[LOOP_BB:\.?LBB[0-9]+_1]]: +; CHECK: ldrex [[OLDVAL:r[0-9]+]], [r[[ADDR:[0-9]+]]] +; CHECK: cmp [[OLDVAL]], r1 +; CHECK: bxne lr +; CHECK: strex [[SUCCESS:r[0-9]+]], r2, [r[[ADDR]]] +; CHECK: cmp [[SUCCESS]], #0 +; CHECK: bne [[LOOP_BB]] +; CHECK: dmb ish +; CHECK: bx lr + + ret i32 %oldval +} + +define i32 @test_cmpxchg_fail_order1(i32 *%addr, i32 %desired, i32 %new) { +; CHECK-LABEL: test_cmpxchg_fail_order1: + + %oldval = cmpxchg i32* %addr, i32 %desired, i32 %new acquire acquire +; CHECK-NOT: dmb ish +; CHECK: [[LOOP_BB:\.?LBB[0-9]+_1]]: +; CHECK: ldrex [[OLDVAL:r[0-9]+]], [r[[ADDR:[0-9]+]]] +; CHECK: cmp [[OLDVAL]], r1 +; CHECK: bne [[END_BB:\.?LBB[0-9]+_[0-9]+]] +; CHECK: strex [[SUCCESS:r[0-9]+]], r2, [r[[ADDR]]] +; CHECK: cmp [[SUCCESS]], #0 +; CHECK: bne [[LOOP_BB]] +; CHECK: [[END_BB]]: +; CHECK: dmb ish +; CHECK: bx lr + + ret i32 %oldval +} |