test/Transforms/ConstraintElimination/dom.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -constraint-elimination -S %s | FileCheck %s
; RUN: opt -passes=constraint-elimination -S %s | FileCheck %s

; Test cases where both the true and false successors reach the same block,
; dominated by one of them.

declare void @use(i1)

define i32 @test1(i32 %x) {
; CHECK-LABEL: @test1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ule i32 [[X:%.*]], 10
; CHECK-NEXT:    br i1 [[C_1]], label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK:       bb1:
; CHECK-NEXT:    [[C_2:%.*]] = icmp ule i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    br label [[BB2]]
; CHECK:       bb2:
; CHECK-NEXT:    [[C_3:%.*]] = icmp ugt i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 [[C_3]])
; CHECK-NEXT:    ret i32 20
;
entry:
  %c.1 = icmp ule i32 %x, 10
  br i1 %c.1, label %bb1, label %bb2

bb1:
  %c.2 = icmp ule i32 %x, 10
  call void @use(i1 %c.2)
  br label %bb2

bb2:
  %c.3 = icmp ugt i32 %x, 10
  call void @use(i1 %c.3)
  ret i32 20
}


define i32 @test2(i32 %x) {
; CHECK-LABEL: @test2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ule i32 [[X:%.*]], 10
; CHECK-NEXT:    br i1 [[C_1]], label [[BB2:%.*]], label [[BB1:%.*]]
; CHECK:       bb1:
; CHECK-NEXT:    [[C_2:%.*]] = icmp ugt i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 [[C_2]])
; CHECK-NEXT:    ret i32 20
; CHECK:       bb2:
; CHECK-NEXT:    [[C_3:%.*]] = icmp ule i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    br label [[BB1]]
;
entry:
  %c.1 = icmp ule i32 %x, 10
  br i1 %c.1, label %bb2, label %bb1

bb1:
  %c.2 = icmp ugt i32 %x, 10
  call void @use(i1 %c.2)
  ret i32 20

bb2:
  %c.3 = icmp ule i32 %x, 10
  call void @use(i1 %c.3)
  br label %bb1
}


; Test cases where the true/false successors are not domianted by the conditional branching block.
define i32 @test3(i32 %x, i1 %c) {
; CHECK-LABEL: @test3(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br i1 [[C:%.*]], label [[BB_COND:%.*]], label [[BB1:%.*]]
; CHECK:       bb.cond:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ule i32 [[X:%.*]], 10
; CHECK-NEXT:    br i1 [[C_1]], label [[BB1]], label [[BB2:%.*]]
; CHECK:       bb1:
; CHECK-NEXT:    [[C_2:%.*]] = icmp ule i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 [[C_2]])
; CHECK-NEXT:    ret i32 10
; CHECK:       bb2:
; CHECK-NEXT:    [[C_3:%.*]] = icmp ugt i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    ret i32 20
;
entry:
  br i1 %c, label %bb.cond, label %bb1

bb.cond:
  %c.1 = icmp ule i32 %x, 10
  br i1 %c.1, label %bb1, label %bb2

bb1:
  %c.2 = icmp ule i32 %x, 10
  call void @use(i1 %c.2)
  ret i32 10

bb2:
  %c.3 = icmp ugt i32 %x, 10
  call void @use(i1 %c.3)
  ret i32 20
}

define i32 @test4(i32 %x, i1 %c) {
; CHECK-LABEL: @test4(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br i1 [[C:%.*]], label [[BB_COND:%.*]], label [[BB2:%.*]]
; CHECK:       bb.cond:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ule i32 [[X:%.*]], 10
; CHECK-NEXT:    br i1 [[C_1]], label [[BB1:%.*]], label [[BB2]]
; CHECK:       bb1:
; CHECK-NEXT:    [[C_2:%.*]] = icmp ule i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    ret i32 10
; CHECK:       bb2:
; CHECK-NEXT:    [[C_3:%.*]] = icmp ugt i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 [[C_3]])
; CHECK-NEXT:    ret i32 20
;
entry:
  br i1 %c, label %bb.cond, label %bb2

bb.cond:
  %c.1 = icmp ule i32 %x, 10
  br i1 %c.1, label %bb1, label %bb2

bb1:
  %c.2 = icmp ule i32 %x, 10
  call void @use(i1 %c.2)
  ret i32 10

bb2:
  %c.3 = icmp ugt i32 %x, 10
  call void @use(i1 %c.3)
  ret i32 20
}


define void @test_cond_from_preheader(i32 %x, i1 %c) {
; CHECK-LABEL: @test_cond_from_preheader(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br i1 [[C:%.*]], label [[PRE:%.*]], label [[BB2:%.*]]
; CHECK:       pre:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ule i32 [[X:%.*]], 10
; CHECK-NEXT:    br i1 [[C_1]], label [[LOOP:%.*]], label [[BB2]]
; CHECK:       loop:
; CHECK-NEXT:    [[T_1:%.*]] = icmp ule i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[F_1:%.*]] = icmp ugt i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 false)
; CHECK-NEXT:    [[C_2:%.*]] = icmp ule i32 [[X]], 9
; CHECK-NEXT:    call void @use(i1 [[C_2]])
; CHECK-NEXT:    [[C_3:%.*]] = icmp ugt i32 [[X]], 9
; CHECK-NEXT:    call void @use(i1 [[C_3]])
; CHECK-NEXT:    br i1 true, label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    [[C_4:%.*]] = icmp ule i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    ret void
; CHECK:       bb2:
; CHECK-NEXT:    [[C_5:%.*]] = icmp ugt i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 [[C_5]])
; CHECK-NEXT:    ret void
;
entry:
  br i1 %c, label %pre, label %bb2

pre:
  %c.1 = icmp ule i32 %x, 10
  br i1 %c.1, label %loop, label %bb2

loop:
  %t.1 = icmp ule i32 %x, 10
  call void @use(i1 %t.1)
  %f.1 = icmp ugt i32 %x, 10
  call void @use(i1 %f.1)

  %c.2 = icmp ule i32 %x, 9
  call void @use(i1 %c.2)
  %c.3 = icmp ugt i32 %x, 9
  call void @use(i1 %c.3)

  br i1 true, label %exit, label %loop

exit:
  %c.4 = icmp ule i32 %x, 10
  call void @use(i1 %c.4)
  ret void

bb2:
  %c.5 = icmp ugt i32 %x, 10
  call void @use(i1 %c.5)
  ret void
}

define void @test_cond_from_preheader_successors_flipped(i32 %x, i1 %c) {
; CHECK-LABEL: @test_cond_from_preheader_successors_flipped(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br i1 [[C:%.*]], label [[PRE:%.*]], label [[BB2:%.*]]
; CHECK:       pre:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ule i32 [[X:%.*]], 10
; CHECK-NEXT:    br i1 [[C_1]], label [[BB2]], label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[F_1:%.*]] = icmp ule i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 false)
; CHECK-NEXT:    [[T_1:%.*]] = icmp ugt i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[C_2:%.*]] = icmp ule i32 [[X]], 11
; CHECK-NEXT:    call void @use(i1 [[C_2]])
; CHECK-NEXT:    [[C_3:%.*]] = icmp ugt i32 [[X]], 11
; CHECK-NEXT:    call void @use(i1 [[C_3]])
; CHECK-NEXT:    br i1 true, label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    [[F_2:%.*]] = icmp ule i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 false)
; CHECK-NEXT:    ret void
; CHECK:       bb2:
; CHECK-NEXT:    [[C_5:%.*]] = icmp ugt i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 [[C_5]])
; CHECK-NEXT:    ret void
;
entry:
  br i1 %c, label %pre, label %bb2

pre:
  %c.1 = icmp ule i32 %x, 10
  br i1 %c.1, label %bb2, label %loop

loop:
  %f.1 = icmp ule i32 %x, 10
  call void @use(i1 %f.1)
  %t.1 = icmp ugt i32 %x, 10
  call void @use(i1 %t.1)

  %c.2 = icmp ule i32 %x, 11
  call void @use(i1 %c.2)
  %c.3 = icmp ugt i32 %x, 11
  call void @use(i1 %c.3)

  br i1 true, label %exit, label %loop

exit:
  %f.2 = icmp ule i32 %x, 10
  call void @use(i1 %f.2)
  ret void

bb2:
  %c.5 = icmp ugt i32 %x, 10
  call void @use(i1 %c.5)
  ret void
}

define void @test_cond_from_preheader_and(i32 %x, i32 %y, i1 %c) {
; CHECK-LABEL: @test_cond_from_preheader_and(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br i1 [[C:%.*]], label [[PRE:%.*]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    [[C_5:%.*]] = icmp ugt i32 [[Y:%.*]], 10
; CHECK-NEXT:    call void @use(i1 [[C_5]])
; CHECK-NEXT:    ret void
; CHECK:       pre:
; CHECK-NEXT:    [[X_1:%.*]] = icmp ule i32 [[X:%.*]], 10
; CHECK-NEXT:    [[Y_1:%.*]] = icmp ugt i32 [[Y]], 99
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[X_1]], [[Y_1]]
; CHECK-NEXT:    br i1 [[AND]], label [[LOOP:%.*]], label [[EXIT_1:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[T_1:%.*]] = icmp ule i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[F_1:%.*]] = icmp ugt i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 false)
; CHECK-NEXT:    [[C_1:%.*]] = icmp ule i32 [[X]], 9
; CHECK-NEXT:    call void @use(i1 [[C_1]])
; CHECK-NEXT:    [[C_2:%.*]] = icmp ugt i32 [[X]], 9
; CHECK-NEXT:    call void @use(i1 [[C_2]])
; CHECK-NEXT:    [[T_2:%.*]] = icmp ugt i32 [[Y]], 99
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[F_2:%.*]] = icmp ule i32 [[Y]], 99
; CHECK-NEXT:    call void @use(i1 false)
; CHECK-NEXT:    [[C_3:%.*]] = icmp ugt i32 [[Y]], 100
; CHECK-NEXT:    call void @use(i1 [[C_3]])
; CHECK-NEXT:    [[C_4:%.*]] = icmp ugt i32 [[Y]], 100
; CHECK-NEXT:    call void @use(i1 [[C_4]])
; CHECK-NEXT:    br i1 true, label [[EXIT]], label [[LOOP]]
; CHECK:       exit.1:
; CHECK-NEXT:    [[C_6:%.*]] = icmp ugt i32 [[Y]], 10
; CHECK-NEXT:    call void @use(i1 [[C_6]])
; CHECK-NEXT:    ret void
;
entry:
  br i1 %c, label %pre, label %exit

exit:
  %c.5 = icmp ugt i32 %y, 10
  call void @use(i1 %c.5)
  ret void

pre:
  %x.1 = icmp ule i32 %x, 10
  %y.1 = icmp ugt i32 %y, 99
  %and = and i1 %x.1, %y.1
  br i1 %and, label %loop, label %exit.1

loop:
  %t.1 = icmp ule i32 %x, 10
  call void @use(i1 %t.1)
  %f.1 = icmp ugt i32 %x, 10
  call void @use(i1 %f.1)
  %c.1 = icmp ule i32 %x, 9
  call void @use(i1 %c.1)
  %c.2 = icmp ugt i32 %x, 9
  call void @use(i1 %c.2)


  %t.2 = icmp ugt i32 %y, 99
  call void @use(i1 %t.2)
  %f.2 = icmp ule i32 %y, 99
  call void @use(i1 %f.2)

  %c.3 = icmp ugt i32 %y, 100
  call void @use(i1 %c.3)
  %c.4 = icmp ugt i32 %y, 100
  call void @use(i1 %c.4)

  br i1 true, label %exit, label %loop

exit.1:
  %c.6 = icmp ugt i32 %y, 10
  call void @use(i1 %c.6)
  ret void
}


define void @test_cond_from_preheader_and_successors_flipped(i32 %x, i32 %y, i1 %c) {
; CHECK-LABEL: @test_cond_from_preheader_and_successors_flipped(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br i1 [[C:%.*]], label [[PRE:%.*]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    [[C_9:%.*]] = icmp ugt i32 [[Y:%.*]], 10
; CHECK-NEXT:    call void @use(i1 [[C_9]])
; CHECK-NEXT:    ret void
; CHECK:       pre:
; CHECK-NEXT:    [[X_1:%.*]] = icmp ule i32 [[X:%.*]], 10
; CHECK-NEXT:    [[Y_1:%.*]] = icmp ugt i32 [[Y]], 99
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[X_1]], [[Y_1]]
; CHECK-NEXT:    br i1 [[AND]], label [[EXIT_1:%.*]], label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ule i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 [[C_1]])
; CHECK-NEXT:    [[C_2:%.*]] = icmp ugt i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 [[C_2]])
; CHECK-NEXT:    [[C_3:%.*]] = icmp ule i32 [[X]], 9
; CHECK-NEXT:    call void @use(i1 [[C_3]])
; CHECK-NEXT:    [[C_4:%.*]] = icmp ugt i32 [[X]], 9
; CHECK-NEXT:    call void @use(i1 [[C_4]])
; CHECK-NEXT:    [[C_5:%.*]] = icmp ugt i32 [[Y]], 99
; CHECK-NEXT:    call void @use(i1 [[C_5]])
; CHECK-NEXT:    [[C_6:%.*]] = icmp ule i32 [[Y]], 99
; CHECK-NEXT:    call void @use(i1 [[C_6]])
; CHECK-NEXT:    [[C_7:%.*]] = icmp ugt i32 [[Y]], 100
; CHECK-NEXT:    call void @use(i1 [[C_7]])
; CHECK-NEXT:    [[C_8:%.*]] = icmp ugt i32 [[Y]], 100
; CHECK-NEXT:    call void @use(i1 [[C_8]])
; CHECK-NEXT:    br i1 true, label [[EXIT]], label [[LOOP]]
; CHECK:       exit.1:
; CHECK-NEXT:    [[T_1:%.*]] = icmp ugt i32 [[Y]], 10
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    ret void
;
entry:
  br i1 %c, label %pre, label %exit

exit:
  %c.9 = icmp ugt i32 %y, 10
  call void @use(i1 %c.9)
  ret void

pre:
  %x.1 = icmp ule i32 %x, 10
  %y.1 = icmp ugt i32 %y, 99
  %and = and i1 %x.1, %y.1
  br i1 %and, label %exit.1, label %loop

loop:
  %c.1 = icmp ule i32 %x, 10
  call void @use(i1 %c.1)
  %c.2 = icmp ugt i32 %x, 10
  call void @use(i1 %c.2)
  %c.3 = icmp ule i32 %x, 9
  call void @use(i1 %c.3)
  %c.4 = icmp ugt i32 %x, 9
  call void @use(i1 %c.4)


  %c.5 = icmp ugt i32 %y, 99
  call void @use(i1 %c.5)
  %c.6 = icmp ule i32 %y, 99
  call void @use(i1 %c.6)

  %c.7 = icmp ugt i32 %y, 100
  call void @use(i1 %c.7)
  %c.8 = icmp ugt i32 %y, 100
  call void @use(i1 %c.8)

  br i1 true, label %exit, label %loop

exit.1:
  %t.1 = icmp ugt i32 %y, 10
  call void @use(i1 %t.1)
  ret void
}

define void @test_cond_from_preheader_or(i32 %x, i32 %y, i1 %c) {
; CHECK-LABEL: @test_cond_from_preheader_or(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br i1 [[C:%.*]], label [[PRE:%.*]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    [[C_5:%.*]] = icmp ugt i32 [[Y:%.*]], 10
; CHECK-NEXT:    call void @use(i1 [[C_5]])
; CHECK-NEXT:    ret void
; CHECK:       pre:
; CHECK-NEXT:    [[X_1:%.*]] = icmp ule i32 [[X:%.*]], 10
; CHECK-NEXT:    [[Y_1:%.*]] = icmp ugt i32 [[Y]], 99
; CHECK-NEXT:    [[OR:%.*]] = or i1 [[X_1]], [[Y_1]]
; CHECK-NEXT:    br i1 [[OR]], label [[EXIT_1:%.*]], label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[T_1:%.*]] = icmp ugt i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[F_1:%.*]] = icmp ule i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 false)
; CHECK-NEXT:    [[C_1:%.*]] = icmp ugt i32 [[X]], 11
; CHECK-NEXT:    call void @use(i1 [[C_1]])
; CHECK-NEXT:    [[C_2:%.*]] = icmp ule i32 [[X]], 11
; CHECK-NEXT:    call void @use(i1 [[C_2]])
; CHECK-NEXT:    [[T_2:%.*]] = icmp ule i32 [[Y]], 99
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[F_2:%.*]] = icmp ugt i32 [[Y]], 99
; CHECK-NEXT:    call void @use(i1 false)
; CHECK-NEXT:    [[C_3:%.*]] = icmp ule i32 [[Y]], 98
; CHECK-NEXT:    call void @use(i1 [[C_3]])
; CHECK-NEXT:    [[C_4:%.*]] = icmp ule i32 [[Y]], 98
; CHECK-NEXT:    call void @use(i1 [[C_4]])
; CHECK-NEXT:    br i1 true, label [[EXIT]], label [[LOOP]]
; CHECK:       exit.1:
; CHECK-NEXT:    [[C_6:%.*]] = icmp ule i32 [[Y]], 100
; CHECK-NEXT:    call void @use(i1 [[C_6]])
; CHECK-NEXT:    ret void
;
entry:
  br i1 %c, label %pre, label %exit

exit:
  %c.5 = icmp ugt i32 %y, 10
  call void @use(i1 %c.5)
  ret void

pre:
  %x.1 = icmp ule i32 %x, 10
  %y.1 = icmp ugt i32 %y, 99
  %or = or i1 %x.1, %y.1
  br i1 %or, label %exit.1, label %loop

loop:
  %t.1 = icmp ugt i32 %x, 10
  call void @use(i1 %t.1)
  %f.1 = icmp ule i32 %x, 10
  call void @use(i1 %f.1)
  %c.1 = icmp ugt i32 %x, 11
  call void @use(i1 %c.1)
  %c.2 = icmp ule i32 %x, 11
  call void @use(i1 %c.2)


  %t.2 = icmp ule i32 %y, 99
  call void @use(i1 %t.2)
  %f.2 = icmp ugt i32 %y, 99
  call void @use(i1 %f.2)

  %c.3 = icmp ule i32 %y, 98
  call void @use(i1 %c.3)
  %c.4 = icmp ule i32 %y, 98
  call void @use(i1 %c.4)

  br i1 true, label %exit, label %loop

exit.1:
  %c.6 = icmp ule i32 %y, 100
  call void @use(i1 %c.6)
  ret void
}

define void @test_cond_from_preheader_or_successor_flipped(i32 %x, i32 %y, i1 %c) {
; CHECK-LABEL: @test_cond_from_preheader_or_successor_flipped(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br i1 [[C:%.*]], label [[PRE:%.*]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    [[C_9:%.*]] = icmp ugt i32 [[Y:%.*]], 10
; CHECK-NEXT:    call void @use(i1 [[C_9]])
; CHECK-NEXT:    ret void
; CHECK:       pre:
; CHECK-NEXT:    [[X_1:%.*]] = icmp ule i32 [[X:%.*]], 10
; CHECK-NEXT:    [[Y_1:%.*]] = icmp ugt i32 [[Y]], 99
; CHECK-NEXT:    [[OR:%.*]] = or i1 [[X_1]], [[Y_1]]
; CHECK-NEXT:    br i1 [[OR]], label [[LOOP:%.*]], label [[EXIT_1:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ule i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 [[C_1]])
; CHECK-NEXT:    [[C_2:%.*]] = icmp ugt i32 [[X]], 10
; CHECK-NEXT:    call void @use(i1 [[C_2]])
; CHECK-NEXT:    [[C_3:%.*]] = icmp ule i32 [[X]], 9
; CHECK-NEXT:    call void @use(i1 [[C_3]])
; CHECK-NEXT:    [[C_4:%.*]] = icmp ugt i32 [[X]], 9
; CHECK-NEXT:    call void @use(i1 [[C_4]])
; CHECK-NEXT:    [[C_5:%.*]] = icmp ugt i32 [[Y]], 99
; CHECK-NEXT:    call void @use(i1 [[C_5]])
; CHECK-NEXT:    [[C_6:%.*]] = icmp ule i32 [[Y]], 99
; CHECK-NEXT:    call void @use(i1 [[C_6]])
; CHECK-NEXT:    [[C_7:%.*]] = icmp ugt i32 [[Y]], 100
; CHECK-NEXT:    call void @use(i1 [[C_7]])
; CHECK-NEXT:    [[C_8:%.*]] = icmp ugt i32 [[Y]], 100
; CHECK-NEXT:    call void @use(i1 [[C_8]])
; CHECK-NEXT:    br i1 true, label [[EXIT]], label [[LOOP]]
; CHECK:       exit.1:
; CHECK-NEXT:    [[T_1:%.*]] = icmp ule i32 [[Y]], 100
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    ret void
;
entry:
  br i1 %c, label %pre, label %exit

exit:
  %c.9 = icmp ugt i32 %y, 10
  call void @use(i1 %c.9)
  ret void

pre:
  %x.1 = icmp ule i32 %x, 10
  %y.1 = icmp ugt i32 %y, 99
  %or = or i1 %x.1, %y.1
  br i1 %or, label %loop, label %exit.1

loop:
  %c.1 = icmp ule i32 %x, 10
  call void @use(i1 %c.1)
  %c.2 = icmp ugt i32 %x, 10
  call void @use(i1 %c.2)
  %c.3 = icmp ule i32 %x, 9
  call void @use(i1 %c.3)
  %c.4 = icmp ugt i32 %x, 9
  call void @use(i1 %c.4)

  %c.5 = icmp ugt i32 %y, 99
  call void @use(i1 %c.5)
  %c.6 = icmp ule i32 %y, 99
  call void @use(i1 %c.6)

  %c.7 = icmp ugt i32 %y, 100
  call void @use(i1 %c.7)
  %c.8 = icmp ugt i32 %y, 100
  call void @use(i1 %c.8)

  br i1 true, label %exit, label %loop

exit.1:
  %t.1 = icmp ule i32 %y, 100
  call void @use(i1 %t.1)
  ret void
}