# RUN: llc -mtriple=x86_64-- -run-pass=machine-region-info %s -debug-only=machine-region-info -o /dev/null 2>&1 | FileCheck %s
# REQUIRES: asserts
---
name:            fun
body:             |
  bb.0:
    CMP32ri8 %edi, 40, implicit-def %eflags
    JNE_1 %bb.7, implicit killed %eflags
    JMP_1 %bb.1

  bb.1:
    CMP32ri8 %edi, 1, implicit-def %eflags
    JNE_1 %bb.11, implicit killed %eflags
    JMP_1 %bb.2

  bb.2:
    CMP32ri8 %edi, 2, implicit-def %eflags
    JNE_1 %bb.5, implicit killed %eflags
    JMP_1 %bb.3

  bb.3:
    CMP32ri8 %edi, 90, implicit-def %eflags
    JNE_1 %bb.5, implicit killed %eflags
    JMP_1 %bb.4

  bb.4:

  bb.5:
    CMP32ri8 %edi, 4, implicit-def %eflags
    JNE_1 %bb.11, implicit killed %eflags
    JMP_1 %bb.6

  bb.6:
    JMP_1 %bb.11

  bb.7:
    CMP32ri8 %edi, 5, implicit-def %eflags
    JE_1 %bb.9, implicit killed %eflags
    JMP_1 %bb.8

  bb.8:

  bb.9:
    CMP32ri8 %edi, 6, implicit-def %eflags
    JE_1 %bb.11, implicit killed %eflags
    JMP_1 %bb.10

  bb.10:

  bb.11:
    RET 0

...

# CHECK: Region tree:
# CHECK-NEXT: [0] BB#0 => <Function Return>
# CHECK-NEXT:   [1] BB#0 => BB#11
# CHECK-NEXT:     [2] BB#7 => BB#9
# CHECK-NEXT:     [2] BB#9 => BB#11
# CHECK-NEXT:     [2] BB#1 => BB#11
# CHECK-NEXT:       [3] BB#2 => BB#5
# CHECK-NEXT:         [4] BB#3 => BB#5
# CHECK-NEXT:       [3] BB#5 => BB#11
# CHECK-NEXT: End region tree