1 ; RUN: llc -mtriple arm64-apple-ios -mattr=+lse %s -o - | FileCheck %s
3 ; Only "even,even+1" pairs are valid for CASP instructions. Make sure LLVM
4 ; doesn't allocate odd ones and that it can copy them around properly. N.b. we
5 ; don't actually check that they're sequential because FileCheck can't; odd/even
6 ; will have to be good enough.
7 define void @test_atomic_cmpxchg_i128_register_shuffling(i128* %addr, i128 %desired, i128 %new) nounwind {
8 ; CHECK-LABEL: test_atomic_cmpxchg_i128_register_shuffling:
9 ; CHECK-DAG: mov [[DESIRED_LO:x[0-9]*[02468]]], x1
10 ; CHECK-DAG: mov [[DESIRED_HI:x[0-9]*[13579]]], x2
11 ; CHECK-DAG: mov [[NEW_LO:x[0-9]*[02468]]], x3
12 ; CHECK-DAG: mov [[NEW_HI:x[0-9]*[13579]]], x4
13 ; CHECK: caspal [[DESIRED_LO]], [[DESIRED_HI]], [[NEW_LO]], [[NEW_HI]], [x0]
15 %res = cmpxchg i128* %addr, i128 %desired, i128 %new seq_cst seq_cst