1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2; RUN: llc < %s -mtriple=arm64-apple-ios --global-isel=0 | FileCheck %s 3 4target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128" 5target triple = "arm64-apple-ios" 6 7declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) 8 9; TargetLowering::SimplifySetCC wants to swap the operands of a SETCC to 10; canonicalize the constant to the RHS. The bug here was that it did so whether 11; or not the RHS was already a constant, leading to an infinite loop. 12define <16 x i1> @setcc_swap_infloop(ptr %arg) { 13; CHECK-LABEL: setcc_swap_infloop: 14; CHECK: ; %bb.0: 15; CHECK-NEXT: movi.16b v1, #1 16; CHECK-NEXT: mov x8, xzr 17; CHECK-NEXT: ldr q0, [x8] 18; CHECK-NEXT: cmeq.16b v0, v0, #0 19; CHECK-NEXT: cmeq.16b v2, v1, #0 20; CHECK-NEXT: str q1, [x8] 21; CHECK-NEXT: mov w8, #16 ; =0x10 22; CHECK-NEXT: str q1, [x8] 23; CHECK-NEXT: orr.16b v0, v0, v2 24; CHECK-NEXT: ret 25 call void @llvm.memset.p0.i64(ptr nonnull null, i8 1, i64 32, i1 false) 26 %v = getelementptr inbounds i8, ptr null, i64 16 27 %v14 = load <16 x i8>, ptr undef, align 32 28 %v15 = icmp eq <16 x i8> %v14, zeroinitializer 29 %v16 = load <16 x i8>, ptr %v, align 16 30 %v17 = icmp eq <16 x i8> %v16, zeroinitializer 31 %v20 = or <16 x i1> %v15, %v17 32 ret <16 x i1> %v20 33} 34