1 ; RUN: llc < %s | FileCheck %s 2 ; Make sure we don't crash in AArch64RedundantCopyElimination when a 3 ; MachineBasicBlock is empty. PR29035. 4 5 target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128" 6 target triple = "aarch64-unknown-linux-gnu" 7 8 declare i8* @bar() 9 10 ; CHECK-LABEL: foo: 11 ; CHECK: tbz 12 ; CHECK: orr 13 ; CHECK: ret 14 ; CHECK: bl bar 15 ; CHECK: cbnz 16 ; CHECK: ret 17 define i1 @foo(i1 %start) { 18 entry: 19 br i1 %start, label %cleanup, label %if.end 20 21 if.end: ; preds = %if.end, %entry 22 %call = tail call i8* @bar() 23 %cmp = icmp eq i8* %call, null 24 br i1 %cmp, label %cleanup, label %if.end 25 26 cleanup: ; preds = %if.end, %entry 27 %retval.0 = phi i1 [ true, %entry ], [ false, %if.end ] 28 ret i1 %retval.0 29 } 30
