llvm/test/CodeGen/AArch64/arm64-setcc-swap-infloop.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=arm64-apple-ios --global-isel=0 | FileCheck %s

target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
target triple = "arm64-apple-ios"

declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg)

; TargetLowering::SimplifySetCC wants to swap the operands of a SETCC to
; canonicalize the constant to the RHS. The bug here was that it did so whether
; or not the RHS was already a constant, leading to an infinite loop.
define <16 x i1> @setcc_swap_infloop(ptr %arg) {
; CHECK-LABEL: setcc_swap_infloop:
; CHECK:       ; %bb.0:
; CHECK-NEXT:    movi.16b v1, #1
; CHECK-NEXT:    mov x8, xzr
; CHECK-NEXT:    ldr q0, [x8]
; CHECK-NEXT:    cmeq.16b v0, v0, #0
; CHECK-NEXT:    cmeq.16b v2, v1, #0
; CHECK-NEXT:    str q1, [x8]
; CHECK-NEXT:    mov w8, #16 ; =0x10
; CHECK-NEXT:    str q1, [x8]
; CHECK-NEXT:    orr.16b v0, v0, v2
; CHECK-NEXT:    ret
  call void @llvm.memset.p0.i64(ptr nonnull null, i8 1, i64 32, i1 false)
  %v = getelementptr inbounds i8, ptr null, i64 16
  %v14 = load <16 x i8>, ptr undef, align 32
  %v15 = icmp eq <16 x i8> %v14, zeroinitializer
  %v16 = load <16 x i8>, ptr %v, align 16
  %v17 = icmp eq <16 x i8> %v16, zeroinitializer
  %v20 = or <16 x i1> %v15, %v17
  ret <16 x i1> %v20
}