| ; RUN: llc < %s | FileCheck %s |
| ; Make sure we don't crash in AArch64RedundantCopyElimination when a |
| ; MachineBasicBlock is empty. PR29035. |
| |
| target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128" |
| target triple = "aarch64-unknown-linux-gnu" |
| |
| declare ptr @bar() |
| |
| ; CHECK-LABEL: foo: |
| ; CHECK: tbz |
| ; CHECK: mov{{.*}}, #1 |
| ; CHECK: ret |
| ; CHECK: bl bar |
| ; CHECK: cbnz |
| ; CHECK: ret |
| define i1 @foo(i1 %start) { |
| entry: |
| br i1 %start, label %cleanup, label %if.end |
| |
| if.end: ; preds = %if.end, %entry |
| %call = tail call ptr @bar() |
| %cmp = icmp eq ptr %call, null |
| br i1 %cmp, label %cleanup, label %if.end |
| |
| cleanup: ; preds = %if.end, %entry |
| %retval.0 = phi i1 [ true, %entry ], [ false, %if.end ] |
| ret i1 %retval.0 |
| } |
