================
@@ -0,0 +1,342 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc --mtriple=loongarch64 -mattr=+d,-scq,-ld-seq-sa < %s | FileCheck %s
--check-prefix=LA64
+; RUN: llc --mtriple=loongarch64 -mattr=+d,+scq,-ld-seq-sa < %s | FileCheck %s
--check-prefixes=LA64-SCQ,NO-LD-SEQ-SA
+; RUN: llc --mtriple=loongarch64 -mattr=+d,+scq,+ld-seq-sa < %s | FileCheck %s
--check-prefixes=LA64-SCQ,LD-SEQ-SA
+
+define void @cmpxchg_i128_acquire_acquire(ptr %ptr, i128 %cmp, i128 %val)
nounwind {
+; LA64-LABEL: cmpxchg_i128_acquire_acquire:
+; LA64: # %bb.0:
+; LA64-NEXT: addi.d $sp, $sp, -32
+; LA64-NEXT: st.d $ra, $sp, 24 # 8-byte Folded Spill
+; LA64-NEXT: move $a6, $a4
+; LA64-NEXT: st.d $a2, $sp, 8
+; LA64-NEXT: st.d $a1, $sp, 0
+; LA64-NEXT: addi.d $a1, $sp, 0
+; LA64-NEXT: ori $a4, $zero, 2
+; LA64-NEXT: ori $a5, $zero, 2
+; LA64-NEXT: move $a2, $a3
+; LA64-NEXT: move $a3, $a6
+; LA64-NEXT: bl %plt(__atomic_compare_exchange_16)
+; LA64-NEXT: ld.d $ra, $sp, 24 # 8-byte Folded Reload
+; LA64-NEXT: addi.d $sp, $sp, 32
+; LA64-NEXT: ret
+;
+; LA64-SCQ-LABEL: cmpxchg_i128_acquire_acquire:
+; LA64-SCQ: # %bb.0:
+; LA64-SCQ-NEXT: .LBB0_1: # =>This Inner Loop Header: Depth=1
+; LA64-SCQ-NEXT: ll.d $a5, $a0, 0
+; LA64-SCQ-NEXT: ld.d $a6, $a0, 8
+; LA64-SCQ-NEXT: bne $a5, $a1, .LBB0_3
+; LA64-SCQ-NEXT: bne $a6, $a2, .LBB0_3
+; LA64-SCQ-NEXT: # %bb.2: # in Loop: Header=BB0_1 Depth=1
+; LA64-SCQ-NEXT: move $a7, $a3
+; LA64-SCQ-NEXT: sc.q $a7, $a4, $a0
+; LA64-SCQ-NEXT: beqz $a7, .LBB0_1
+; LA64-SCQ-NEXT: b .LBB0_4
+; LA64-SCQ-NEXT: .LBB0_3:
+; LA64-SCQ-NEXT: dbar 20
+; LA64-SCQ-NEXT: .LBB0_4:
+; LA64-SCQ-NEXT: ret
+ %res = cmpxchg ptr %ptr, i128 %cmp, i128 %val acquire acquire
+ ret void
----------------
heiher wrote:
It is better to return result of `cmpxchg` here to help verify the correctness
of its return value implementation.
https://github.com/llvm/llvm-project/pull/116771
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