1; RUN: llc < %s -verify-machineinstrs 2 3; Make sure we don't end up with a CBNZ of an undef v-/phys-reg. 4 5target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128" 6target triple = "arm64-apple-ios" 7 8declare void @bar(ptr) 9 10define void @foo(ptr %m, i32 %off0) { 11.thread1653: 12 br i1 undef, label %0, label %.thread1880 13 14 %1 = icmp eq i32 undef, 0 15 %.not = xor i1 %1, true 16 %brmerge = or i1 %.not, undef 17 br i1 %brmerge, label %.thread1880, label %.thread1705 18 19.thread1705: 20 ret void 21 22.thread1880: 23 %m1652.ph = phi ptr [ %m, %0 ], [ null, %.thread1653 ] 24 call void @bar(ptr %m1652.ph) 25 ret void 26} 27