1; Check that basic block section is emitted when a non-entry block has no predecessors.
2; RUN: llc < %s -mtriple=x86_64 -O0 -basic-block-sections=all | FileCheck %s --check-prefix=CHECK-SECTIONS
3; RUN: llc < %s -mtriple=x86_64 -O0 | FileCheck %s --check-prefix=CHECK-NOSECTIONS
4define void @foo(i32* %bar) {
5  %v = load i32, i32* %bar
6  switch i32 %v, label %default [
7    i32 0, label %target
8  ]
9target:
10  ret void
11;; This is the block which will not have any predecessors. If the block is not garbage collected, it must
12;; be placed in a basic block section with a corresponding symbol.
13default:
14  unreachable
15; CHECK-NOSECTIONS:     # %bb.2:     # %default
16; CHECK-SECTIONS:       .section .text.foo,"ax",@progbits,unique,2
17; CHECK-SECTIONS-NEXT:  foo.__part.2:       # %default
18}
19