chr.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -chr -instcombine -simplifycfg -S -enable-new-pm=0 | FileCheck %s
; RUN: opt < %s -passes='require<profile-summary>,function(chr,instcombine,simplify-cfg)' -S | FileCheck %s

declare void @foo()
declare void @bar()

; Simple case.
; Roughly,
; t0 = *i
; if ((t0 & 1) != 0) // Likely true
;   foo()
; if ((t0 & 2) != 0) // Likely true
;   foo()
; ->
; t0 = *i
; if ((t0 & 3) != 0) { // Likely true
;   foo()
;   foo()
; } else {
;   if ((t0 & 1) != 0)
;     foo()
;   if ((t0 & 2) != 0)
;     foo()
; }
define void @test_chr_1(i32* %i) !prof !14 {
; CHECK-LABEL: @test_chr_1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[TMP0]], 3
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[TMP1]], 3
; CHECK-NEXT:    br i1 [[TMP2]], label [[BB0:%.*]], label [[ENTRY_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       bb0:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3:%.*]]
; CHECK:       entry.split.nonchr:
; CHECK-NEXT:    [[TMP3:%.*]] = and i32 [[TMP0]], 1
; CHECK-NEXT:    [[DOTNOT:%.*]] = icmp eq i32 [[TMP3]], 0
; CHECK-NEXT:    br i1 [[DOTNOT]], label [[BB1_NONCHR:%.*]], label [[BB0_NONCHR:%.*]], !prof !16
; CHECK:       bb0.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB1_NONCHR]]
; CHECK:       bb1.nonchr:
; CHECK-NEXT:    [[TMP4:%.*]] = and i32 [[TMP0]], 2
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i32 [[TMP4]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[BB3]], label [[BB2_NONCHR:%.*]], !prof !16
; CHECK:       bb2.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3]]
; CHECK:       bb3:
; CHECK-NEXT:    ret void
;
entry:
  %0 = load i32, i32* %i
  %1 = and i32 %0, 1
  %2 = icmp eq i32 %1, 0
  br i1 %2, label %bb1, label %bb0, !prof !15

bb0:
  call void @foo()
  br label %bb1

bb1:
  %3 = and i32 %0, 2
  %4 = icmp eq i32 %3, 0
  br i1 %4, label %bb3, label %bb2, !prof !15

bb2:
  call void @foo()
  br label %bb3

bb3:
  ret void
}

; Simple case with a cold block.
; Roughly,
; t0 = *i
; if ((t0 & 1) != 0) // Likely true
;   foo()
; if ((t0 & 2) == 0) // Likely false
;   bar()
; if ((t0 & 4) != 0) // Likely true
;   foo()
; ->
; t0 = *i
; if ((t0 & 7) == 7) { // Likely true
;   foo()
;   foo()
; } else {
;   if ((t0 & 1) != 0)
;     foo()
;   if ((t0 & 2) == 0)
;     bar()
;   if ((t0 & 4) != 0)
;     foo()
; }
define void @test_chr_1_1(i32* %i) !prof !14 {
; CHECK-LABEL: @test_chr_1_1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[TMP0]], 7
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[TMP1]], 7
; CHECK-NEXT:    br i1 [[TMP2]], label [[BB0:%.*]], label [[ENTRY_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       bb0:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB5:%.*]]
; CHECK:       entry.split.nonchr:
; CHECK-NEXT:    [[TMP3:%.*]] = and i32 [[TMP0]], 1
; CHECK-NEXT:    [[DOTNOT:%.*]] = icmp eq i32 [[TMP3]], 0
; CHECK-NEXT:    br i1 [[DOTNOT]], label [[BB1_NONCHR:%.*]], label [[BB0_NONCHR:%.*]], !prof !16
; CHECK:       bb0.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB1_NONCHR]]
; CHECK:       bb1.nonchr:
; CHECK-NEXT:    [[TMP4:%.*]] = and i32 [[TMP0]], 2
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i32 [[TMP4]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[BB2_NONCHR:%.*]], label [[BB3_NONCHR:%.*]], !prof !16
; CHECK:       bb2.nonchr:
; CHECK-NEXT:    call void @bar()
; CHECK-NEXT:    br label [[BB3_NONCHR]]
; CHECK:       bb3.nonchr:
; CHECK-NEXT:    [[TMP6:%.*]] = and i32 [[TMP0]], 4
; CHECK-NEXT:    [[TMP7:%.*]] = icmp eq i32 [[TMP6]], 0
; CHECK-NEXT:    br i1 [[TMP7]], label [[BB5]], label [[BB4_NONCHR:%.*]], !prof !16
; CHECK:       bb4.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB5]]
; CHECK:       bb5:
; CHECK-NEXT:    ret void
;
entry:
  %0 = load i32, i32* %i
  %1 = and i32 %0, 1
  %2 = icmp eq i32 %1, 0
  br i1 %2, label %bb1, label %bb0, !prof !15

bb0:
  call void @foo()
  br label %bb1

bb1:
  %3 = and i32 %0, 2
  %4 = icmp eq i32 %3, 0
  br i1 %4, label %bb2, label %bb3, !prof !15

bb2:
  call void @bar()
  br label %bb3

bb3:
  %5 = and i32 %0, 4
  %6 = icmp eq i32 %5, 0
  br i1 %6, label %bb5, label %bb4, !prof !15

bb4:
  call void @foo()
  br label %bb5

bb5:
  ret void
}

; With an aggregate bit check.
; Roughly,
; t0 = *i
; if ((t0 & 255) != 0) // Likely true
;   if ((t0 & 1) != 0) // Likely true
;     foo()
;   if ((t0 & 2) != 0) // Likely true
;     foo()
; ->
; t0 = *i
; if ((t0 & 3) != 0) { // Likely true
;   foo()
;   foo()
; } else if ((t0 & 255) != 0)
;   if ((t0 & 1) != 0)
;     foo()
;   if ((t0 & 2) != 0)
;     foo()
; }
define void @test_chr_2(i32* %i) !prof !14 {
; CHECK-LABEL: @test_chr_2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[TMP0]], 3
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[TMP1]], 3
; CHECK-NEXT:    br i1 [[TMP2]], label [[BB1:%.*]], label [[ENTRY_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       bb1:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB4:%.*]]
; CHECK:       entry.split.nonchr:
; CHECK-NEXT:    [[TMP3:%.*]] = and i32 [[TMP0]], 255
; CHECK-NEXT:    [[DOTNOT:%.*]] = icmp eq i32 [[TMP3]], 0
; CHECK-NEXT:    br i1 [[DOTNOT]], label [[BB4]], label [[BB0_NONCHR:%.*]], !prof !16
; CHECK:       bb0.nonchr:
; CHECK-NEXT:    [[TMP4:%.*]] = and i32 [[TMP0]], 1
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i32 [[TMP4]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[BB2_NONCHR:%.*]], label [[BB1_NONCHR:%.*]], !prof !16
; CHECK:       bb2.nonchr:
; CHECK-NEXT:    [[TMP6:%.*]] = and i32 [[TMP0]], 2
; CHECK-NEXT:    [[TMP7:%.*]] = icmp eq i32 [[TMP6]], 0
; CHECK-NEXT:    br i1 [[TMP7]], label [[BB4]], label [[BB3_NONCHR:%.*]], !prof !16
; CHECK:       bb3.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB4]]
; CHECK:       bb1.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB2_NONCHR]]
; CHECK:       bb4:
; CHECK-NEXT:    ret void
;
entry:
  %0 = load i32, i32* %i
  %1 = and i32 %0, 255
  %2 = icmp eq i32 %1, 0
  br i1 %2, label %bb4, label %bb0, !prof !15

bb0:
  %3 = and i32 %0, 1
  %4 = icmp eq i32 %3, 0
  br i1 %4, label %bb2, label %bb1, !prof !15

bb1:
  call void @foo()
  br label %bb2

bb2:
  %5 = and i32 %0, 2
  %6 = icmp eq i32 %5, 0
  br i1 %6, label %bb4, label %bb3, !prof !15

bb3:
  call void @foo()
  br label %bb4

bb4:
  ret void
}

; Split case.
; Roughly,
; t1 = *i
; if ((t1 & 1) != 0) // Likely true
;   foo()
; if ((t1 & 2) != 0) // Likely true
;   foo()
; t2 = *i
; if ((t2 & 4) != 0) // Likely true
;   foo()
; if ((t2 & 8) != 0) // Likely true
;   foo()
; ->
; t1 = *i
; if ((t1 & 3) != 0) { // Likely true
;   foo()
;   foo()
; } else {
;   if ((t1 & 1) != 0)
;     foo()
;   if ((t1 & 2) != 0)
;     foo()
; }
; t2 = *i
; if ((t2 & 12) != 0) { // Likely true
;   foo()
;   foo()
; } else {
;   if ((t2 & 4) != 0)
;     foo()
;   if ((t2 & 8) != 0)
;     foo()
; }
define void @test_chr_3(i32* %i) !prof !14 {
; CHECK-LABEL: @test_chr_3(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[TMP0]], 3
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[TMP1]], 3
; CHECK-NEXT:    br i1 [[TMP2]], label [[BB0:%.*]], label [[ENTRY_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       bb0:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3:%.*]]
; CHECK:       entry.split.nonchr:
; CHECK-NEXT:    [[TMP3:%.*]] = and i32 [[TMP0]], 1
; CHECK-NEXT:    [[DOTNOT:%.*]] = icmp eq i32 [[TMP3]], 0
; CHECK-NEXT:    br i1 [[DOTNOT]], label [[BB1_NONCHR:%.*]], label [[BB0_NONCHR:%.*]], !prof !16
; CHECK:       bb0.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB1_NONCHR]]
; CHECK:       bb1.nonchr:
; CHECK-NEXT:    [[TMP4:%.*]] = and i32 [[TMP0]], 2
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i32 [[TMP4]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[BB3]], label [[BB2_NONCHR:%.*]], !prof !16
; CHECK:       bb2.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3]]
; CHECK:       bb3:
; CHECK-NEXT:    [[TMP6:%.*]] = load i32, i32* [[I]], align 4
; CHECK-NEXT:    [[TMP7:%.*]] = and i32 [[TMP6]], 12
; CHECK-NEXT:    [[TMP8:%.*]] = icmp eq i32 [[TMP7]], 12
; CHECK-NEXT:    br i1 [[TMP8]], label [[BB4:%.*]], label [[BB3_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       bb4:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB7:%.*]]
; CHECK:       bb3.split.nonchr:
; CHECK-NEXT:    [[TMP9:%.*]] = and i32 [[TMP6]], 4
; CHECK-NEXT:    [[DOTNOT1:%.*]] = icmp eq i32 [[TMP9]], 0
; CHECK-NEXT:    br i1 [[DOTNOT1]], label [[BB5_NONCHR:%.*]], label [[BB4_NONCHR:%.*]], !prof !16
; CHECK:       bb4.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB5_NONCHR]]
; CHECK:       bb5.nonchr:
; CHECK-NEXT:    [[TMP10:%.*]] = and i32 [[TMP6]], 8
; CHECK-NEXT:    [[TMP11:%.*]] = icmp eq i32 [[TMP10]], 0
; CHECK-NEXT:    br i1 [[TMP11]], label [[BB7]], label [[BB6_NONCHR:%.*]], !prof !16
; CHECK:       bb6.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB7]]
; CHECK:       bb7:
; CHECK-NEXT:    ret void
;
entry:
  %0 = load i32, i32* %i
  %1 = and i32 %0, 1
  %2 = icmp eq i32 %1, 0
  br i1 %2, label %bb1, label %bb0, !prof !15

bb0:
  call void @foo()
  br label %bb1

bb1:
  %3 = and i32 %0, 2
  %4 = icmp eq i32 %3, 0
  br i1 %4, label %bb3, label %bb2, !prof !15

bb2:
  call void @foo()
  br label %bb3

bb3:
  %5 = load i32, i32* %i
  %6 = and i32 %5, 4
  %7 = icmp eq i32 %6, 0
  br i1 %7, label %bb5, label %bb4, !prof !15

bb4:
  call void @foo()
  br label %bb5

bb5:
  %8 = and i32 %5, 8
  %9 = icmp eq i32 %8, 0
  br i1 %9, label %bb7, label %bb6, !prof !15

bb6:
  call void @foo()
  br label %bb7

bb7:
  ret void
}

; Selects.
; Roughly,
; t0 = *i
; sum1 = (t0 & 1) ? sum0 : (sum0 + 42) // Likely false
; sum2 = (t0 & 2) ? sum1 : (sum1 + 43) // Likely false
; return sum2
; ->
; t0 = *i
; if ((t0 & 3) == 3)
;   return sum0 + 85
; else {
;   sum1 = (t0 & 1) ? sum0 : (sum0 + 42)
;   sum2 = (t0 & 2) ? sum1 : (sum1 + 43)
;   return sum2
; }
define i32 @test_chr_4(i32* %i, i32 %sum0) !prof !14 {
; CHECK-LABEL: @test_chr_4(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[TMP0]], 3
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[TMP1]], 3
; CHECK-NEXT:    br i1 [[TMP2]], label [[ENTRY_SPLIT:%.*]], label [[ENTRY_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       entry.split:
; CHECK-NEXT:    [[TMP3:%.*]] = add i32 [[SUM0:%.*]], 85
; CHECK-NEXT:    ret i32 [[TMP3]]
; CHECK:       entry.split.nonchr:
; CHECK-NEXT:    [[TMP4:%.*]] = add i32 [[SUM0]], 42
; CHECK-NEXT:    [[TMP5:%.*]] = and i32 [[TMP0]], 1
; CHECK-NEXT:    [[DOTNOT:%.*]] = icmp eq i32 [[TMP5]], 0
; CHECK-NEXT:    [[SUM1_NONCHR:%.*]] = select i1 [[DOTNOT]], i32 [[SUM0]], i32 [[TMP4]], !prof !16
; CHECK-NEXT:    [[TMP6:%.*]] = and i32 [[TMP0]], 2
; CHECK-NEXT:    [[TMP7:%.*]] = icmp eq i32 [[TMP6]], 0
; CHECK-NEXT:    [[TMP8:%.*]] = add i32 [[SUM1_NONCHR]], 43
; CHECK-NEXT:    [[SUM2_NONCHR:%.*]] = select i1 [[TMP7]], i32 [[SUM1_NONCHR]], i32 [[TMP8]], !prof !16
; CHECK-NEXT:    ret i32 [[SUM2_NONCHR]]
;
entry:
  %0 = load i32, i32* %i
  %1 = and i32 %0, 1
  %2 = icmp eq i32 %1, 0
  %3 = add i32 %sum0, 42
  %sum1 = select i1 %2, i32 %sum0, i32 %3, !prof !15
  %4 = and i32 %0, 2
  %5 = icmp eq i32 %4, 0
  %6 = add i32 %sum1, 43
  %sum2 = select i1 %5, i32 %sum1, i32 %6, !prof !15
  ret i32 %sum2
}

; Selects + Brs
; Roughly,
; t0 = *i
; if ((t0 & 255) != 0) { // Likely true
;   sum = (t0 & 1) ? sum0 : (sum0 + 42) // Likely false
;   sum = (t0 & 2) ? sum : (sum + 43) // Likely false
;   if ((t0 & 4) != 0) { // Likely true
;     sum3 = sum + 44
;     sum = (t0 & 8) ? sum3 : (sum3 + 44) // Likely false
;   }
; }
; return sum
; ->
; t0 = *i
; if ((t0 & 15) != 15) { // Likely true
;   sum = sum0 + 173
; } else if ((t0 & 255) != 0) {
;   sum = (t0 & 1) ? sum0 : (sum0 + 42)
;   sum = (t0 & 2) ? sum : (sum + 43)
;   if ((t0 & 4) != 0) {
;     sum3 = sum + 44
;     sum = (t0 & 8) ? sum3 : (sum3 + 44)
;   }
; }
; return sum
define i32 @test_chr_5(i32* %i, i32 %sum0) !prof !14 {
; CHECK-LABEL: @test_chr_5(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[TMP0]], 15
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[TMP1]], 15
; CHECK-NEXT:    br i1 [[TMP2]], label [[BB0:%.*]], label [[ENTRY_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       bb0:
; CHECK-NEXT:    [[TMP3:%.*]] = add i32 [[SUM0:%.*]], 85
; CHECK-NEXT:    [[TMP4:%.*]] = add i32 [[SUM0]], 173
; CHECK-NEXT:    br label [[BB3:%.*]]
; CHECK:       entry.split.nonchr:
; CHECK-NEXT:    [[TMP5:%.*]] = and i32 [[TMP0]], 255
; CHECK-NEXT:    [[DOTNOT:%.*]] = icmp eq i32 [[TMP5]], 0
; CHECK-NEXT:    br i1 [[DOTNOT]], label [[BB3]], label [[BB0_NONCHR:%.*]], !prof !16
; CHECK:       bb0.nonchr:
; CHECK-NEXT:    [[TMP6:%.*]] = and i32 [[TMP0]], 1
; CHECK-NEXT:    [[TMP7:%.*]] = icmp eq i32 [[TMP6]], 0
; CHECK-NEXT:    [[TMP8:%.*]] = add i32 [[SUM0]], 42
; CHECK-NEXT:    [[SUM1_NONCHR:%.*]] = select i1 [[TMP7]], i32 [[SUM0]], i32 [[TMP8]], !prof !16
; CHECK-NEXT:    [[TMP9:%.*]] = and i32 [[TMP0]], 2
; CHECK-NEXT:    [[TMP10:%.*]] = icmp eq i32 [[TMP9]], 0
; CHECK-NEXT:    [[TMP11:%.*]] = add i32 [[SUM1_NONCHR]], 43
; CHECK-NEXT:    [[SUM2_NONCHR:%.*]] = select i1 [[TMP10]], i32 [[SUM1_NONCHR]], i32 [[TMP11]], !prof !16
; CHECK-NEXT:    [[TMP12:%.*]] = and i32 [[TMP0]], 4
; CHECK-NEXT:    [[TMP13:%.*]] = icmp eq i32 [[TMP12]], 0
; CHECK-NEXT:    [[TMP14:%.*]] = and i32 [[TMP0]], 8
; CHECK-NEXT:    [[TMP15:%.*]] = icmp eq i32 [[TMP14]], 0
; CHECK-NEXT:    [[SUM4_NONCHR_V:%.*]] = select i1 [[TMP15]], i32 44, i32 88
; CHECK-NEXT:    [[SUM4_NONCHR:%.*]] = add i32 [[SUM2_NONCHR]], [[SUM4_NONCHR_V]]
; CHECK-NEXT:    [[SUM5_NONCHR:%.*]] = select i1 [[TMP13]], i32 [[SUM2_NONCHR]], i32 [[SUM4_NONCHR]], !prof !16
; CHECK-NEXT:    br label [[BB3]]
; CHECK:       bb3:
; CHECK-NEXT:    [[SUM6:%.*]] = phi i32 [ [[TMP4]], [[BB0]] ], [ [[SUM0]], [[ENTRY_SPLIT_NONCHR]] ], [ [[SUM5_NONCHR]], [[BB0_NONCHR]] ]
; CHECK-NEXT:    ret i32 [[SUM6]]
;
entry:
  %0 = load i32, i32* %i
  %1 = and i32 %0, 255
  %2 = icmp eq i32 %1, 0
  br i1 %2, label %bb3, label %bb0, !prof !15

bb0:
  %3 = and i32 %0, 1
  %4 = icmp eq i32 %3, 0
  %5 = add i32 %sum0, 42
  %sum1 = select i1 %4, i32 %sum0, i32 %5, !prof !15
  %6 = and i32 %0, 2
  %7 = icmp eq i32 %6, 0
  %8 = add i32 %sum1, 43
  %sum2 = select i1 %7, i32 %sum1, i32 %8, !prof !15
  %9 = and i32 %0, 4
  %10 = icmp eq i32 %9, 0
  br i1 %10, label %bb2, label %bb1, !prof !15

bb1:
  %sum3 = add i32 %sum2, 44
  %11 = and i32 %0, 8
  %12 = icmp eq i32 %11, 0
  %13 = add i32 %sum3, 44
  %sum4 = select i1 %12, i32 %sum3, i32 %13, !prof !15
  br label %bb2

bb2:
  %sum5 = phi i32 [ %sum2, %bb0 ], [ %sum4, %bb1 ]
  br label %bb3

bb3:
  %sum6 = phi i32 [ %sum0, %entry ], [ %sum5, %bb2 ]
  ret i32 %sum6
}

; Selects + Brs with a scope split in the middle
; Roughly,
; t0 = *i
; if ((t0 & 255) != 0) { // Likely true
;   sum = (t0 & 1) ? sum0 : (sum0 + 42) // Likely false
;   sum = (t0 & 2) ? sum : (sum + 43) // Likely false
;   if ((sum0 & 4) != 0) { // Likely true. The condition doesn't use v.
;     sum3 = sum + 44
;     sum = (t0 & 8) ? sum3 : (sum3 + 44) // Likely false
;   }
; }
; return sum
; ->
; t0 = *i
; if ((sum0 & 4) != 0 & (t0 & 11) != 11) { // Likely true
;   sum = sum0 + 173
; } else if ((t0 & 255) != 0) {
;   sum = (t0 & 1) ? sum0 : (sum0 + 42)
;   sum = (t0 & 2) ? sum : (sum + 43)
;   if ((sum0 & 4) != 0) {
;     sum3 = sum + 44
;     sum = (t0 & 8) ? sum3 : (sum3 + 44)
;   }
; }
; return sum
define i32 @test_chr_5_1(i32* %i, i32 %sum0) !prof !14 {
; CHECK-LABEL: @test_chr_5_1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[SUM0:%.*]], 4
; CHECK-NEXT:    [[TMP2:%.*]] = icmp ne i32 [[TMP1]], 0
; CHECK-NEXT:    [[TMP3:%.*]] = and i32 [[TMP0]], 11
; CHECK-NEXT:    [[TMP4:%.*]] = icmp eq i32 [[TMP3]], 11
; CHECK-NEXT:    [[TMP5:%.*]] = and i1 [[TMP4]], [[TMP2]]
; CHECK-NEXT:    br i1 [[TMP5]], label [[BB0:%.*]], label [[ENTRY_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       bb0:
; CHECK-NEXT:    [[TMP6:%.*]] = add i32 [[SUM0]], 85
; CHECK-NEXT:    [[TMP7:%.*]] = add i32 [[SUM0]], 173
; CHECK-NEXT:    br label [[BB3:%.*]]
; CHECK:       entry.split.nonchr:
; CHECK-NEXT:    [[TMP8:%.*]] = and i32 [[TMP0]], 255
; CHECK-NEXT:    [[DOTNOT:%.*]] = icmp eq i32 [[TMP8]], 0
; CHECK-NEXT:    br i1 [[DOTNOT]], label [[BB3]], label [[BB0_NONCHR:%.*]], !prof !16
; CHECK:       bb0.nonchr:
; CHECK-NEXT:    [[TMP9:%.*]] = and i32 [[TMP0]], 1
; CHECK-NEXT:    [[TMP10:%.*]] = icmp eq i32 [[TMP9]], 0
; CHECK-NEXT:    [[TMP11:%.*]] = add i32 [[SUM0]], 42
; CHECK-NEXT:    [[SUM1_NONCHR:%.*]] = select i1 [[TMP10]], i32 [[SUM0]], i32 [[TMP11]], !prof !16
; CHECK-NEXT:    [[TMP12:%.*]] = and i32 [[TMP0]], 2
; CHECK-NEXT:    [[TMP13:%.*]] = icmp eq i32 [[TMP12]], 0
; CHECK-NEXT:    [[TMP14:%.*]] = add i32 [[SUM1_NONCHR]], 43
; CHECK-NEXT:    [[SUM2_NONCHR:%.*]] = select i1 [[TMP13]], i32 [[SUM1_NONCHR]], i32 [[TMP14]], !prof !16
; CHECK-NEXT:    [[TMP15:%.*]] = and i32 [[SUM0]], 4
; CHECK-NEXT:    [[TMP16:%.*]] = icmp eq i32 [[TMP15]], 0
; CHECK-NEXT:    [[TMP17:%.*]] = and i32 [[TMP0]], 8
; CHECK-NEXT:    [[TMP18:%.*]] = icmp eq i32 [[TMP17]], 0
; CHECK-NEXT:    [[SUM4_NONCHR_V:%.*]] = select i1 [[TMP18]], i32 44, i32 88
; CHECK-NEXT:    [[SUM4_NONCHR:%.*]] = add i32 [[SUM2_NONCHR]], [[SUM4_NONCHR_V]]
; CHECK-NEXT:    [[SUM5_NONCHR:%.*]] = select i1 [[TMP16]], i32 [[SUM2_NONCHR]], i32 [[SUM4_NONCHR]], !prof !16
; CHECK-NEXT:    br label [[BB3]]
; CHECK:       bb3:
; CHECK-NEXT:    [[SUM6:%.*]] = phi i32 [ [[TMP7]], [[BB0]] ], [ [[SUM0]], [[ENTRY_SPLIT_NONCHR]] ], [ [[SUM5_NONCHR]], [[BB0_NONCHR]] ]
; CHECK-NEXT:    ret i32 [[SUM6]]
;
entry:
  %0 = load i32, i32* %i
  %1 = and i32 %0, 255
  %2 = icmp eq i32 %1, 0
  br i1 %2, label %bb3, label %bb0, !prof !15

bb0:
  %3 = and i32 %0, 1
  %4 = icmp eq i32 %3, 0
  %5 = add i32 %sum0, 42
  %sum1 = select i1 %4, i32 %sum0, i32 %5, !prof !15
  %6 = and i32 %0, 2
  %7 = icmp eq i32 %6, 0
  %8 = add i32 %sum1, 43
  %sum2 = select i1 %7, i32 %sum1, i32 %8, !prof !15
  %9 = and i32 %sum0, 4                              ; Split
  %10 = icmp eq i32 %9, 0
  br i1 %10, label %bb2, label %bb1, !prof !15

bb1:
  %sum3 = add i32 %sum2, 44
  %11 = and i32 %0, 8
  %12 = icmp eq i32 %11, 0
  %13 = add i32 %sum3, 44
  %sum4 = select i1 %12, i32 %sum3, i32 %13, !prof !15
  br label %bb2

bb2:
  %sum5 = phi i32 [ %sum2, %bb0 ], [ %sum4, %bb1 ]
  br label %bb3

bb3:
  %sum6 = phi i32 [ %sum0, %entry ], [ %sum5, %bb2 ]
  ret i32 %sum6
}

; Selects + Brs, non-matching bases
; Roughly,
; i0 = *i
; j0 = *j
; if ((i0 & 255) != 0) { // Likely true
;   sum = (i0 & 2) ? sum0 : (sum0 + 43) // Likely false
;   if ((j0 & 4) != 0) { // Likely true. The condition uses j0, not i0.
;     sum3 = sum + 44
;     sum = (i0 & 8) ? sum3 : (sum3 + 44) // Likely false
;   }
; }
; return sum
; ->
; i0 = *i
; j0 = *j
; if ((j0 & 4) != 0 & (i0 & 10) != 10) { // Likely true
;   sum = sum0 + 131
; } else if ((i0 & 255) != 0) {
;   sum = (i0 & 2) ? sum0 : (sum0 + 43)
;   if ((j0 & 4) != 0) {
;     sum3 = sum + 44
;     sum = (i0 & 8) ? sum3 : (sum3 + 44)
;   }
; }
; return sum
define i32 @test_chr_6(i32* %i, i32* %j, i32 %sum0) !prof !14 {
; CHECK-LABEL: @test_chr_6(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[I0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[J0:%.*]] = load i32, i32* [[J:%.*]], align 4
; CHECK-NEXT:    [[V9:%.*]] = and i32 [[J0]], 4
; CHECK-NEXT:    [[V10:%.*]] = icmp ne i32 [[V9]], 0
; CHECK-NEXT:    [[TMP0:%.*]] = and i32 [[I0]], 10
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i32 [[TMP0]], 10
; CHECK-NEXT:    [[TMP2:%.*]] = and i1 [[TMP1]], [[V10]]
; CHECK-NEXT:    br i1 [[TMP2]], label [[BB0:%.*]], label [[ENTRY_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       bb0:
; CHECK-NEXT:    [[V8:%.*]] = add i32 [[SUM0:%.*]], 43
; CHECK-NEXT:    [[V13:%.*]] = add i32 [[SUM0]], 131
; CHECK-NEXT:    br label [[BB3:%.*]]
; CHECK:       entry.split.nonchr:
; CHECK-NEXT:    [[V1:%.*]] = and i32 [[I0]], 255
; CHECK-NEXT:    [[V2_NOT:%.*]] = icmp eq i32 [[V1]], 0
; CHECK-NEXT:    br i1 [[V2_NOT]], label [[BB3]], label [[BB0_NONCHR:%.*]], !prof !16
; CHECK:       bb0.nonchr:
; CHECK-NEXT:    [[V3_NONCHR:%.*]] = and i32 [[I0]], 2
; CHECK-NEXT:    [[V4_NONCHR:%.*]] = icmp eq i32 [[V3_NONCHR]], 0
; CHECK-NEXT:    [[V8_NONCHR:%.*]] = add i32 [[SUM0]], 43
; CHECK-NEXT:    [[SUM2_NONCHR:%.*]] = select i1 [[V4_NONCHR]], i32 [[SUM0]], i32 [[V8_NONCHR]], !prof !16
; CHECK-NEXT:    [[V9_NONCHR:%.*]] = and i32 [[J0]], 4
; CHECK-NEXT:    [[V10_NONCHR:%.*]] = icmp eq i32 [[V9_NONCHR]], 0
; CHECK-NEXT:    [[V11_NONCHR:%.*]] = and i32 [[I0]], 8
; CHECK-NEXT:    [[V12_NONCHR:%.*]] = icmp eq i32 [[V11_NONCHR]], 0
; CHECK-NEXT:    [[SUM4_NONCHR_V:%.*]] = select i1 [[V12_NONCHR]], i32 44, i32 88
; CHECK-NEXT:    [[SUM4_NONCHR:%.*]] = add i32 [[SUM2_NONCHR]], [[SUM4_NONCHR_V]]
; CHECK-NEXT:    [[SUM5_NONCHR:%.*]] = select i1 [[V10_NONCHR]], i32 [[SUM2_NONCHR]], i32 [[SUM4_NONCHR]], !prof !16
; CHECK-NEXT:    br label [[BB3]]
; CHECK:       bb3:
; CHECK-NEXT:    [[SUM6:%.*]] = phi i32 [ [[V13]], [[BB0]] ], [ [[SUM0]], [[ENTRY_SPLIT_NONCHR]] ], [ [[SUM5_NONCHR]], [[BB0_NONCHR]] ]
; CHECK-NEXT:    ret i32 [[SUM6]]
;
entry:
  %i0 = load i32, i32* %i
  %j0 = load i32, i32* %j
  %v1 = and i32 %i0, 255
  %v2 = icmp eq i32 %v1, 0
  br i1 %v2, label %bb3, label %bb0, !prof !15

bb0:
  %v3 = and i32 %i0, 2
  %v4 = icmp eq i32 %v3, 0
  %v8 = add i32 %sum0, 43
  %sum2 = select i1 %v4, i32 %sum0, i32 %v8, !prof !15
  %v9 = and i32 %j0, 4
  %v10 = icmp eq i32 %v9, 0
  br i1 %v10, label %bb2, label %bb1, !prof !15

bb1:
  %sum3 = add i32 %sum2, 44
  %v11 = and i32 %i0, 8
  %v12 = icmp eq i32 %v11, 0
  %v13 = add i32 %sum3, 44
  %sum4 = select i1 %v12, i32 %sum3, i32 %v13, !prof !15
  br label %bb2

bb2:
  %sum5 = phi i32 [ %sum2, %bb0 ], [ %sum4, %bb1 ]
  br label %bb3

bb3:
  %sum6 = phi i32 [ %sum0, %entry ], [ %sum5, %bb2 ]
  ret i32 %sum6
}

; Selects + Brs, the branch condition can't be hoisted to be merged with a
; select. No CHR happens.
; Roughly,
; i0 = *i
; sum = ((i0 & 2) == 0) ? sum0 : (sum0 + 43)  // Likely false
; foo();
; j0 = *j
; if ((j0 & 4) != 0) { // Likely true
;   foo();
;   sum = sum + 44
; }
; return sum
; ->
; (no change)
define i32 @test_chr_7(i32* %i, i32* %j, i32 %sum0) !prof !14 {
; CHECK-LABEL: @test_chr_7(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[I0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[V3:%.*]] = and i32 [[I0]], 2
; CHECK-NEXT:    [[V4:%.*]] = icmp eq i32 [[V3]], 0
; CHECK-NEXT:    [[V8:%.*]] = add i32 [[SUM0:%.*]], 43
; CHECK-NEXT:    [[SUM2:%.*]] = select i1 [[V4]], i32 [[SUM0]], i32 [[V8]], !prof !16
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    [[J0:%.*]] = load i32, i32* [[J:%.*]], align 4
; CHECK-NEXT:    [[V9:%.*]] = and i32 [[J0]], 4
; CHECK-NEXT:    [[V10:%.*]] = icmp eq i32 [[V9]], 0
; CHECK-NEXT:    br i1 [[V10]], label [[BB2:%.*]], label [[BB1:%.*]], !prof !16
; CHECK:       bb1:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    [[SUM4:%.*]] = add i32 [[SUM2]], 44
; CHECK-NEXT:    br label [[BB2]]
; CHECK:       bb2:
; CHECK-NEXT:    [[SUM5:%.*]] = phi i32 [ [[SUM2]], [[ENTRY:%.*]] ], [ [[SUM4]], [[BB1]] ]
; CHECK-NEXT:    ret i32 [[SUM5]]
;
entry:
  %i0 = load i32, i32* %i
  %v3 = and i32 %i0, 2
  %v4 = icmp eq i32 %v3, 0
  %v8 = add i32 %sum0, 43
  %sum2 = select i1 %v4, i32 %sum0, i32 %v8, !prof !15
  call void @foo()
  %j0 = load i32, i32* %j
  %v9 = and i32 %j0, 4
  %v10 = icmp eq i32 %v9, 0
  br i1 %v10, label %bb2, label %bb1, !prof !15    ; %v10 can't be hoisted above the above select

bb1:
  call void @foo()
  %sum4 = add i32 %sum2, 44
  br label %bb2

bb2:
  %sum5 = phi i32 [ %sum2, %entry ], [ %sum4, %bb1 ]
  ret i32 %sum5
}

; Selects + Brs, the branch condition can't be hoisted to be merged with the
; selects. Dropping the select.
; Roughly,
; i0 = *i
; sum = ((i0 & 2) == 0) ? sum0 : (sum0 + 43)  // Likely false
; foo();
; j0 = *j
; if ((j0 & 4) != 0) // Likely true
;   foo()
; if ((j0 & 8) != 0) // Likely true
;   foo()
; return sum
; ->
; i0 = *i
; sum = ((i0 & 2) == 0) ? sum0 : (sum0 + 43)  // Likely false
; foo();
; j0 = *j
; if ((j0 & 12) != 12) { // Likely true
;   foo()
;   foo()
; } else {
;   if ((j0 & 4) != 0)
;     foo()
;   if ((j0 & 8) != 0)
;     foo()
; }
; return sum
define i32 @test_chr_7_1(i32* %i, i32* %j, i32 %sum0) !prof !14 {
; CHECK-LABEL: @test_chr_7_1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[I0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    [[J0:%.*]] = load i32, i32* [[J:%.*]], align 4
; CHECK-NEXT:    [[TMP0:%.*]] = and i32 [[J0]], 12
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i32 [[TMP0]], 12
; CHECK-NEXT:    br i1 [[TMP1]], label [[BB0:%.*]], label [[ENTRY_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       bb0:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3:%.*]]
; CHECK:       entry.split.nonchr:
; CHECK-NEXT:    [[V9:%.*]] = and i32 [[J0]], 4
; CHECK-NEXT:    [[V10_NOT:%.*]] = icmp eq i32 [[V9]], 0
; CHECK-NEXT:    br i1 [[V10_NOT]], label [[BB1_NONCHR:%.*]], label [[BB0_NONCHR:%.*]], !prof !16
; CHECK:       bb0.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB1_NONCHR]]
; CHECK:       bb1.nonchr:
; CHECK-NEXT:    [[V11_NONCHR:%.*]] = and i32 [[J0]], 8
; CHECK-NEXT:    [[V12_NONCHR:%.*]] = icmp eq i32 [[V11_NONCHR]], 0
; CHECK-NEXT:    br i1 [[V12_NONCHR]], label [[BB3]], label [[BB2_NONCHR:%.*]], !prof !16
; CHECK:       bb2.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3]]
; CHECK:       bb3:
; CHECK-NEXT:    [[V3:%.*]] = and i32 [[I0]], 2
; CHECK-NEXT:    [[V4:%.*]] = icmp eq i32 [[V3]], 0
; CHECK-NEXT:    [[V8:%.*]] = add i32 [[SUM0:%.*]], 43
; CHECK-NEXT:    [[SUM2:%.*]] = select i1 [[V4]], i32 [[SUM0]], i32 [[V8]], !prof !16
; CHECK-NEXT:    ret i32 [[SUM2]]
;
entry:
  %i0 = load i32, i32* %i
  %v3 = and i32 %i0, 2
  %v4 = icmp eq i32 %v3, 0
  %v8 = add i32 %sum0, 43
  %sum2 = select i1 %v4, i32 %sum0, i32 %v8, !prof !15
  call void @foo()
  %j0 = load i32, i32* %j
  %v9 = and i32 %j0, 4
  %v10 = icmp eq i32 %v9, 0
  br i1 %v10, label %bb1, label %bb0, !prof !15    ; %v10 can't be hoisted above the above select

bb0:
  call void @foo()
  br label %bb1

bb1:
  %v11 = and i32 %j0, 8
  %v12 = icmp eq i32 %v11, 0
  br i1 %v12, label %bb3, label %bb2, !prof !15

bb2:
  call void @foo()
  br label %bb3

bb3:
  ret i32 %sum2
}

; Branches aren't biased enough. No CHR happens.
; Roughly,
; t0 = *i
; if ((t0 & 1) != 0) // Not biased
;   foo()
; if ((t0 & 2) != 0) // Not biased
;   foo()
; ->
; (no change)
define void @test_chr_8(i32* %i) !prof !14 {
; CHECK-LABEL: @test_chr_8(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[TMP0]], 1
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[TMP1]], 0
; CHECK-NEXT:    br i1 [[TMP2]], label [[BB1:%.*]], label [[BB0:%.*]], !prof !17
; CHECK:       bb0:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB1]]
; CHECK:       bb1:
; CHECK-NEXT:    [[TMP3:%.*]] = and i32 [[TMP0]], 2
; CHECK-NEXT:    [[TMP4:%.*]] = icmp eq i32 [[TMP3]], 0
; CHECK-NEXT:    br i1 [[TMP4]], label [[BB3:%.*]], label [[BB2:%.*]], !prof !17
; CHECK:       bb2:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3]]
; CHECK:       bb3:
; CHECK-NEXT:    ret void
;
entry:
  %0 = load i32, i32* %i
  %1 = and i32 %0, 1
  %2 = icmp eq i32 %1, 0
  br i1 %2, label %bb1, label %bb0, !prof !16

bb0:
  call void @foo()
  br label %bb1

bb1:
  %3 = and i32 %0, 2
  %4 = icmp eq i32 %3, 0
  br i1 %4, label %bb3, label %bb2, !prof !16

bb2:
  call void @foo()
  br label %bb3

bb3:
  ret void
}

; With an existing phi at the exit.
; Roughly,
; t = *i
; if ((t0 & 1) != 0) // Likely true
;   foo()
; if ((t0 & 2) != 0) { // Likely true
;   t = *j
;   foo()
; }
; // There's a phi for t here.
; return t
; ->
; t = *i
; if ((t & 3) == 3) { // Likely true
;   foo()
;   t = *j
;   foo()
; } else {
;   if ((t & 1) != 0)
;     foo()
;   if ((t & 2) != 0) {
;     t = *j
;     foo()
;   }
; }
; // There's a phi for t here.
; return t
define i32 @test_chr_9(i32* %i, i32* %j) !prof !14 {
; CHECK-LABEL: @test_chr_9(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[TMP0]], 3
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[TMP1]], 3
; CHECK-NEXT:    br i1 [[TMP2]], label [[BB0:%.*]], label [[ENTRY_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       bb0:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    [[TMP3:%.*]] = load i32, i32* [[J:%.*]], align 4
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3:%.*]]
; CHECK:       entry.split.nonchr:
; CHECK-NEXT:    [[TMP4:%.*]] = and i32 [[TMP0]], 1
; CHECK-NEXT:    [[DOTNOT:%.*]] = icmp eq i32 [[TMP4]], 0
; CHECK-NEXT:    br i1 [[DOTNOT]], label [[BB1_NONCHR:%.*]], label [[BB0_NONCHR:%.*]], !prof !16
; CHECK:       bb0.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB1_NONCHR]]
; CHECK:       bb1.nonchr:
; CHECK-NEXT:    [[TMP5:%.*]] = and i32 [[TMP0]], 2
; CHECK-NEXT:    [[TMP6:%.*]] = icmp eq i32 [[TMP5]], 0
; CHECK-NEXT:    br i1 [[TMP6]], label [[BB3]], label [[BB2_NONCHR:%.*]], !prof !16
; CHECK:       bb2.nonchr:
; CHECK-NEXT:    [[TMP7:%.*]] = load i32, i32* [[J]], align 4
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3]]
; CHECK:       bb3:
; CHECK-NEXT:    [[TMP8:%.*]] = phi i32 [ [[TMP3]], [[BB0]] ], [ [[TMP0]], [[BB1_NONCHR]] ], [ [[TMP7]], [[BB2_NONCHR]] ]
; CHECK-NEXT:    ret i32 [[TMP8]]
;
entry:
  %0 = load i32, i32* %i
  %1 = and i32 %0, 1
  %2 = icmp eq i32 %1, 0
  br i1 %2, label %bb1, label %bb0, !prof !15

bb0:
  call void @foo()
  br label %bb1

bb1:
  %3 = and i32 %0, 2
  %4 = icmp eq i32 %3, 0
  br i1 %4, label %bb3, label %bb2, !prof !15

bb2:
  %5 = load i32, i32* %j
  call void @foo()
  br label %bb3

bb3:
  %6 = phi i32 [ %0, %bb1 ], [ %5, %bb2 ]
  ret i32 %6
}

; With no phi at the exit, but the exit needs a phi inserted after CHR.
; Roughly,
; t0 = *i
; if ((t0 & 1) != 0) // Likely true
;   foo()
; t1 = *j
; if ((t1 & 2) != 0) // Likely true
;   foo()
; return (t1 * 42) - (t1 - 99)
; ->
; t0 = *i
; if ((t0 & 3) == 3) { // Likely true
;   foo()
;   t1 = *j
;   foo()
; } else {
;   if ((t0 & 1) != 0)
;     foo()
;   if ((t0 & 2) != 0) {
;     t1 = *j
;     foo()
;   }
; }
; // A new phi for t1 is inserted here.
; return (t1 * 42) - (t1 - 99)
define i32 @test_chr_10(i32* %i, i32* %j) !prof !14 {
; CHECK-LABEL: @test_chr_10(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[TMP0]], 3
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[TMP1]], 3
; CHECK-NEXT:    br i1 [[TMP2]], label [[BB0:%.*]], label [[ENTRY_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       bb0:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    [[TMP3:%.*]] = load i32, i32* [[J:%.*]], align 4
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3:%.*]]
; CHECK:       entry.split.nonchr:
; CHECK-NEXT:    [[TMP4:%.*]] = and i32 [[TMP0]], 1
; CHECK-NEXT:    [[DOTNOT:%.*]] = icmp eq i32 [[TMP4]], 0
; CHECK-NEXT:    br i1 [[DOTNOT]], label [[BB1_NONCHR:%.*]], label [[BB0_NONCHR:%.*]], !prof !16
; CHECK:       bb0.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB1_NONCHR]]
; CHECK:       bb1.nonchr:
; CHECK-NEXT:    [[TMP5:%.*]] = load i32, i32* [[J]], align 4
; CHECK-NEXT:    [[TMP6:%.*]] = and i32 [[TMP0]], 2
; CHECK-NEXT:    [[TMP7:%.*]] = icmp eq i32 [[TMP6]], 0
; CHECK-NEXT:    br i1 [[TMP7]], label [[BB3]], label [[BB2_NONCHR:%.*]], !prof !16
; CHECK:       bb2.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3]]
; CHECK:       bb3:
; CHECK-NEXT:    [[TMP8:%.*]] = phi i32 [ [[TMP3]], [[BB0]] ], [ [[TMP5]], [[BB2_NONCHR]] ], [ [[TMP5]], [[BB1_NONCHR]] ]
; CHECK-NEXT:    [[TMP9:%.*]] = mul i32 [[TMP8]], 42
; CHECK-NEXT:    [[TMP10:%.*]] = add i32 [[TMP8]], -99
; CHECK-NEXT:    [[TMP11:%.*]] = add i32 [[TMP9]], [[TMP10]]
; CHECK-NEXT:    ret i32 [[TMP11]]
;
entry:
  %0 = load i32, i32* %i
  %1 = and i32 %0, 1
  %2 = icmp eq i32 %1, 0
  br i1 %2, label %bb1, label %bb0, !prof !15

bb0:
  call void @foo()
  br label %bb1

bb1:
  %3 = load i32, i32* %j
  %4 = and i32 %0, 2
  %5 = icmp eq i32 %4, 0
  br i1 %5, label %bb3, label %bb2, !prof !15

bb2:
  call void @foo()
  br label %bb3

bb3:
  %6 = mul i32 %3, 42
  %7 = sub i32 %3, 99
  %8 = add i32 %6, %7
  ret i32 %8
}

; Test a case where there are two use-def chain paths to the same value (t0)
; from the branch condition. This is a regression test for an old bug that
; caused a bad hoisting that moves (hoists) a value (%conv) twice to the end of
; the %entry block (once for %div and once for %mul16) and put a use ahead of
; its definition like:
; %entry:
;   ...
;   %div = fdiv double 1.000000e+00, %conv
;   %conv = sitofp i32 %0 to double
;   %mul16 = fmul double %div, %conv
;
; Roughly,
; t0 = *i
; if ((t0 & 1) != 0) // Likely true
;   foo()
; // there are two use-def paths from the branch condition to t0.
; if ((1.0 / t0) * t0 < 1) // Likely true
;   foo()
; ->
; t0 = *i
; if ((t0 & 1) != 0 & (1.0 / t0) * t0 > 0) { // Likely true
;   foo()
;   foo()
; } else {
;   if ((t0 & 1) != 0)
;     foo()
;   if ((1.0 / t0) * t0 < 1) // Likely true
;     foo()
; }
define void @test_chr_11(i32* %i, i32 %x) !prof !14 {
; CHECK-LABEL: @test_chr_11(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[TMP0]], 1
; CHECK-NEXT:    [[TMP2:%.*]] = icmp ne i32 [[TMP1]], 0
; CHECK-NEXT:    [[CONV:%.*]] = sitofp i32 [[TMP0]] to double
; CHECK-NEXT:    [[DIV:%.*]] = fdiv double 1.000000e+00, [[CONV]]
; CHECK-NEXT:    [[MUL16:%.*]] = fmul double [[DIV]], [[CONV]]
; CHECK-NEXT:    [[CONV717:%.*]] = fptosi double [[MUL16]] to i32
; CHECK-NEXT:    [[CMP18:%.*]] = icmp sgt i32 [[CONV717]], 0
; CHECK-NEXT:    [[TMP3:%.*]] = and i1 [[TMP2]], [[CMP18]]
; CHECK-NEXT:    br i1 [[TMP3]], label [[BB0:%.*]], label [[ENTRY_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       bb0:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3:%.*]]
; CHECK:       entry.split.nonchr:
; CHECK-NEXT:    br i1 [[TMP2]], label [[BB0_NONCHR:%.*]], label [[BB1_NONCHR:%.*]], !prof !18
; CHECK:       bb0.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB1_NONCHR]]
; CHECK:       bb1.nonchr:
; CHECK-NEXT:    [[CONV_NONCHR:%.*]] = sitofp i32 [[TMP0]] to double
; CHECK-NEXT:    [[DIV_NONCHR:%.*]] = fdiv double 1.000000e+00, [[CONV_NONCHR]]
; CHECK-NEXT:    [[MUL16_NONCHR:%.*]] = fmul double [[DIV_NONCHR]], [[CONV_NONCHR]]
; CHECK-NEXT:    [[CONV717_NONCHR:%.*]] = fptosi double [[MUL16_NONCHR]] to i32
; CHECK-NEXT:    [[CMP18_NONCHR:%.*]] = icmp slt i32 [[CONV717_NONCHR]], 1
; CHECK-NEXT:    br i1 [[CMP18_NONCHR]], label [[BB3]], label [[BB2_NONCHR:%.*]], !prof !16
; CHECK:       bb2.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3]]
; CHECK:       bb3:
; CHECK-NEXT:    ret void
;
entry:
  %0 = load i32, i32* %i
  %1 = and i32 %0, 1
  %2 = icmp eq i32 %1, 0
  br i1 %2, label %bb1, label %bb0, !prof !15

bb0:
  call void @foo()
  br label %bb1

bb1:
  %conv = sitofp i32 %0 to double
  %div = fdiv double 1.000000e+00, %conv
  %mul16 = fmul double %div, %conv
  %conv717 = fptosi double %mul16 to i32
  %cmp18 = icmp slt i32 %conv717, 1
  br i1 %cmp18, label %bb3, label %bb2, !prof !15

bb2:
  call void @foo()
  br label %bb3

bb3:
  ret void
}

; Selects + unrelated br only
define i32 @test_chr_12(i32* %i, i32 %sum0) !prof !14 {
; CHECK-LABEL: @test_chr_12(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[TMP0]], 255
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[TMP1]], 0
; CHECK-NEXT:    br i1 [[TMP2]], label [[BB3:%.*]], label [[BB0:%.*]], !prof !16
; CHECK:       bb0:
; CHECK-NEXT:    [[TMP3:%.*]] = and i32 [[TMP0]], 1
; CHECK-NEXT:    [[TMP4:%.*]] = icmp eq i32 [[TMP3]], 0
; CHECK-NEXT:    [[TMP5:%.*]] = add i32 [[SUM0:%.*]], 42
; CHECK-NEXT:    [[SUM1:%.*]] = select i1 [[TMP4]], i32 [[SUM0]], i32 [[TMP5]], !prof !16
; CHECK-NEXT:    [[TMP6:%.*]] = and i32 [[TMP0]], 2
; CHECK-NEXT:    [[TMP7:%.*]] = icmp eq i32 [[TMP6]], 0
; CHECK-NEXT:    [[TMP8:%.*]] = add i32 [[SUM1]], 43
; CHECK-NEXT:    [[SUM2:%.*]] = select i1 [[TMP7]], i32 [[SUM1]], i32 [[TMP8]], !prof !16
; CHECK-NEXT:    [[TMP9:%.*]] = load i32, i32* [[I]], align 4
; CHECK-NEXT:    [[TMP10:%.*]] = icmp ne i32 [[TMP9]], 0
; CHECK-NEXT:    [[TMP11:%.*]] = and i32 [[TMP0]], 8
; CHECK-NEXT:    [[TMP12:%.*]] = icmp ne i32 [[TMP11]], 0
; CHECK-NEXT:    [[TMP13:%.*]] = and i1 [[TMP10]], [[TMP12]]
; CHECK-NEXT:    br i1 [[TMP13]], label [[BB1:%.*]], label [[BB0_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       bb1:
; CHECK-NEXT:    [[TMP14:%.*]] = add i32 [[SUM2]], 88
; CHECK-NEXT:    br label [[BB3]]
; CHECK:       bb0.split.nonchr:
; CHECK-NEXT:    br i1 [[TMP10]], label [[BB1_NONCHR:%.*]], label [[BB3]], !prof !18
; CHECK:       bb1.nonchr:
; CHECK-NEXT:    [[TMP15:%.*]] = and i32 [[TMP0]], 8
; CHECK-NEXT:    [[TMP16:%.*]] = icmp eq i32 [[TMP15]], 0
; CHECK-NEXT:    [[SUM4_NONCHR_V:%.*]] = select i1 [[TMP16]], i32 44, i32 88, !prof !16
; CHECK-NEXT:    [[SUM4_NONCHR:%.*]] = add i32 [[SUM2]], [[SUM4_NONCHR_V]]
; CHECK-NEXT:    br label [[BB3]]
; CHECK:       bb3:
; CHECK-NEXT:    [[SUM6:%.*]] = phi i32 [ [[SUM0]], [[ENTRY:%.*]] ], [ [[TMP14]], [[BB1]] ], [ [[SUM2]], [[BB0_SPLIT_NONCHR]] ], [ [[SUM4_NONCHR]], [[BB1_NONCHR]] ]
; CHECK-NEXT:    ret i32 [[SUM6]]
;
entry:
  %0 = load i32, i32* %i
  %1 = and i32 %0, 255
  %2 = icmp eq i32 %1, 0
  br i1 %2, label %bb3, label %bb0, !prof !15

bb0:
  %3 = and i32 %0, 1
  %4 = icmp eq i32 %3, 0
  %5 = add i32 %sum0, 42
  %sum1 = select i1 %4, i32 %sum0, i32 %5, !prof !15
  %6 = and i32 %0, 2
  %7 = icmp eq i32 %6, 0
  %8 = add i32 %sum1, 43
  %sum2 = select i1 %7, i32 %sum1, i32 %8, !prof !15
  %9 = load i32, i32* %i
  %10 = icmp eq i32 %9, 0
  br i1 %10, label %bb2, label %bb1, !prof !15

bb1:
  %sum3 = add i32 %sum2, 44
  %11 = and i32 %0, 8
  %12 = icmp eq i32 %11, 0
  %13 = add i32 %sum3, 44
  %sum4 = select i1 %12, i32 %sum3, i32 %13, !prof !15
  br label %bb2

bb2:
  %sum5 = phi i32 [ %sum2, %bb0 ], [ %sum4, %bb1 ]
  br label %bb3

bb3:
  %sum6 = phi i32 [ %sum0, %entry ], [ %sum5, %bb2 ]
  ret i32 %sum6
}

; In the second CHR, a condition value depends on a trivial phi that's inserted
; by the first CHR.
; Roughly,
; i0 = *i
; v2 = (z != 1) ? pred : true  // Likely false
; if (z == 0 & pred)  // Likely false
;   foo()
; j0 = *j
; sum2 = ((i0 & 2) == j0) ? sum0 : (sum0 + 43) // Likely false
; sum3 = ((i0 == j0) ? sum0 : (sum0 + 43) // Likely false
; foo()
; if ((i0 & 4) == 0) // Unbiased
;   foo()
; return i0 + sum3
; ->
; i0 = *i
; if (z != 1 & (z == 0 & pred)) // First CHR
;   foo()
; // A trivial phi for i0 is inserted here by the first CHR (which gets removed
; // later) and the subsequent branch condition (for the second CHR) uses it.
; j0 = *j
; if ((i0 & 2) != j0 & i0 != j0) {  // Second CHR
;   sum3 = sum0 + 43
;   foo()
;   if (i0 & 4) == 0)
;     foo()
; } else {
;   sum3 = (i0 == j0) ? sum0 : (sum0 + 43)
;   foo()
;   if (i0 & 4) == 0)
;     foo()
; }
; return i0 + sum3
define i32 @test_chr_14(i32* %i, i32* %j, i32 %sum0, i1 %pred, i32 %z) !prof !14 {
; CHECK-LABEL: @test_chr_14(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[I0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[V1:%.*]] = icmp ne i32 [[Z:%.*]], 1
; CHECK-NEXT:    [[V0:%.*]] = icmp eq i32 [[Z]], 0
; CHECK-NEXT:    [[V3_NONCHR:%.*]] = and i1 [[V0]], [[PRED:%.*]]
; CHECK-NEXT:    [[OR_COND:%.*]] = and i1 [[V1]], [[V3_NONCHR]]
; CHECK-NEXT:    br i1 [[OR_COND]], label [[BB0_NONCHR:%.*]], label [[BB1:%.*]], !prof !19
; CHECK:       bb0.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB1]]
; CHECK:       bb1:
; CHECK-NEXT:    [[J0:%.*]] = load i32, i32* [[J:%.*]], align 4
; CHECK-NEXT:    [[V6:%.*]] = and i32 [[I0]], 2
; CHECK-NEXT:    [[V4:%.*]] = icmp ne i32 [[V6]], [[J0]]
; CHECK-NEXT:    [[V8:%.*]] = add i32 [[SUM0:%.*]], 43
; CHECK-NEXT:    [[V5:%.*]] = icmp ne i32 [[I0]], [[J0]]
; CHECK-NEXT:    [[TMP0:%.*]] = and i1 [[V4]], [[V5]]
; CHECK-NEXT:    br i1 [[TMP0]], label [[BB1_SPLIT:%.*]], label [[BB1_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       bb1.split:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    [[V9:%.*]] = and i32 [[I0]], 4
; CHECK-NEXT:    [[V10:%.*]] = icmp eq i32 [[V9]], 0
; CHECK-NEXT:    br i1 [[V10]], label [[BB3:%.*]], label [[BB2:%.*]]
; CHECK:       bb2:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3]]
; CHECK:       bb1.split.nonchr:
; CHECK-NEXT:    [[V5_NONCHR:%.*]] = icmp eq i32 [[I0]], [[J0]]
; CHECK-NEXT:    [[SUM3_NONCHR:%.*]] = select i1 [[V5_NONCHR]], i32 [[SUM0]], i32 [[V8]], !prof !16
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    [[V9_NONCHR:%.*]] = and i32 [[I0]], 4
; CHECK-NEXT:    [[V10_NONCHR:%.*]] = icmp eq i32 [[V9_NONCHR]], 0
; CHECK-NEXT:    br i1 [[V10_NONCHR]], label [[BB3]], label [[BB2_NONCHR:%.*]]
; CHECK:       bb2.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3]]
; CHECK:       bb3:
; CHECK-NEXT:    [[TMP1:%.*]] = phi i32 [ [[V8]], [[BB2]] ], [ [[V8]], [[BB1_SPLIT]] ], [ [[SUM3_NONCHR]], [[BB2_NONCHR]] ], [ [[SUM3_NONCHR]], [[BB1_SPLIT_NONCHR]] ]
; CHECK-NEXT:    [[V11:%.*]] = add i32 [[I0]], [[TMP1]]
; CHECK-NEXT:    ret i32 [[V11]]
;
entry:
  %i0 = load i32, i32* %i
  %v0 = icmp eq i32 %z, 0
  %v1 = icmp ne i32 %z, 1
  %v2 = select i1 %v1, i1 %pred, i1 true, !prof !15
  %v3 = and i1 %v0, %pred
  br i1 %v3, label %bb0, label %bb1, !prof !15

bb0:
  call void @foo()
  br label %bb1

bb1:
  %j0 = load i32, i32* %j
  %v6 = and i32 %i0, 2
  %v4 = icmp eq i32 %v6, %j0
  %v8 = add i32 %sum0, 43
  %sum2 = select i1 %v4, i32 %sum0, i32 %v8, !prof !15
  %v5 = icmp eq i32 %i0, %j0
  %sum3 = select i1 %v5, i32 %sum0, i32 %v8, !prof !15
  call void @foo()
  %v9 = and i32 %i0, 4
  %v10 = icmp eq i32 %v9, 0
  br i1 %v10, label %bb3, label %bb2

bb2:
  call void @foo()
  br label %bb3

bb3:
  %v11 = add i32 %i0, %sum3
  ret i32 %v11
}

; Branch or selects depends on another select. No CHR happens.
; Roughly,
; i0 = *i
; if (z == 0 & ((z != 1) ? pred : true)) { // Likely false
;   foo()
; j0 = *j
; sum2 = ((i0 & 2) == j0) ? sum0 : (sum0 + 43) // Likely false
; sum3 = (i0 == sum2) ? sum2 : (sum0 + 43) // Likely false. This depends on the
;                                          // previous select.
; foo()
; if ((i0 & 4) == 0) // Unbiased
;   foo()
; return i0 + sum3
; ->
; (no change)
define i32 @test_chr_15(i32* %i, i32* %j, i32 %sum0, i1 %pred, i32 %z) !prof !14 {
; CHECK-LABEL: @test_chr_15(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[I0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[V0:%.*]] = icmp eq i32 [[Z:%.*]], 0
; CHECK-NEXT:    [[V3:%.*]] = and i1 [[V0]], [[PRED:%.*]]
; CHECK-NEXT:    br i1 [[V3]], label [[BB0:%.*]], label [[BB1:%.*]], !prof !16
; CHECK:       bb0:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB1]]
; CHECK:       bb1:
; CHECK-NEXT:    [[J0:%.*]] = load i32, i32* [[J:%.*]], align 4
; CHECK-NEXT:    [[V6:%.*]] = and i32 [[I0]], 2
; CHECK-NEXT:    [[V4:%.*]] = icmp eq i32 [[V6]], [[J0]]
; CHECK-NEXT:    [[V8:%.*]] = add i32 [[SUM0:%.*]], 43
; CHECK-NEXT:    [[SUM2:%.*]] = select i1 [[V4]], i32 [[SUM0]], i32 [[V8]], !prof !16
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    [[V9:%.*]] = and i32 [[I0]], 4
; CHECK-NEXT:    [[V10:%.*]] = icmp eq i32 [[V9]], 0
; CHECK-NEXT:    br i1 [[V10]], label [[BB3:%.*]], label [[BB2:%.*]]
; CHECK:       bb2:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3]]
; CHECK:       bb3:
; CHECK-NEXT:    [[V5:%.*]] = icmp eq i32 [[I0]], [[SUM2]]
; CHECK-NEXT:    [[SUM3:%.*]] = select i1 [[V5]], i32 [[SUM2]], i32 [[V8]], !prof !16
; CHECK-NEXT:    [[V11:%.*]] = add i32 [[I0]], [[SUM3]]
; CHECK-NEXT:    ret i32 [[V11]]
;
entry:
  %i0 = load i32, i32* %i
  %v0 = icmp eq i32 %z, 0
  %v1 = icmp ne i32 %z, 1
  %v2 = select i1 %v1, i1 %pred, i1 true, !prof !15
  %v3 = and i1 %v0, %v2
  br i1 %v3, label %bb0, label %bb1, !prof !15

bb0:
  call void @foo()
  br label %bb1

bb1:
  %j0 = load i32, i32* %j
  %v6 = and i32 %i0, 2
  %v4 = icmp eq i32 %v6, %j0
  %v8 = add i32 %sum0, 43
  %sum2 = select i1 %v4, i32 %sum0, i32 %v8, !prof !15
  %v5 = icmp eq i32 %i0, %sum2
  %sum3 = select i1 %v5, i32 %sum2, i32 %v8, !prof !15
  call void @foo()
  %v9 = and i32 %i0, 4
  %v10 = icmp eq i32 %v9, 0
  br i1 %v10, label %bb3, label %bb2

bb2:
  call void @foo()
  br label %bb3

bb3:
  %v11 = add i32 %i0, %sum3
  ret i32 %v11
}

; With an existing phi at the exit but a value (%v40) is both alive and is an
; operand to a phi at the exit block.
; Roughly,
; t0 = *i
; if ((t0 & 1) != 0) // Likely true
;   foo()
; v40 = t0 + 44
; if ((t0 & 2) != 0) // Likely true
;   v41 = t0 + 99
;   foo()
; }
; v42 = phi v40, v41
; return v42 + v40
; ->
; t0 = *i
; if ((t0 & 3) == 3) // Likely true
;   foo()
;   v40 = t0 + 44
;   v41 = t0 + 99
;   foo()
; } else {
;   if ((t0 & 1) != 0) // Likely true
;     foo()
;   v40_nc = t0 + 44
;   if ((t0 & 2) != 0) // Likely true
;     v41_nc = t0 + 99
;     foo()
;   }
; }
; t7 = phi v40, v40_nc
; v42 = phi v41, v41_nc
; v43 = v42 + t7
; return v43
define i32 @test_chr_16(i32* %i) !prof !14 {
; CHECK-LABEL: @test_chr_16(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[TMP0]], 3
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[TMP1]], 3
; CHECK-NEXT:    br i1 [[TMP2]], label [[BB0:%.*]], label [[ENTRY_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       bb0:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    [[V40:%.*]] = add i32 [[TMP0]], 44
; CHECK-NEXT:    [[V41:%.*]] = add i32 [[TMP0]], 99
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3:%.*]]
; CHECK:       entry.split.nonchr:
; CHECK-NEXT:    [[TMP3:%.*]] = and i32 [[TMP0]], 1
; CHECK-NEXT:    [[DOTNOT:%.*]] = icmp eq i32 [[TMP3]], 0
; CHECK-NEXT:    br i1 [[DOTNOT]], label [[BB1_NONCHR:%.*]], label [[BB0_NONCHR:%.*]], !prof !16
; CHECK:       bb0.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB1_NONCHR]]
; CHECK:       bb1.nonchr:
; CHECK-NEXT:    [[V40_NONCHR:%.*]] = add i32 [[TMP0]], 44
; CHECK-NEXT:    [[TMP4:%.*]] = and i32 [[TMP0]], 2
; CHECK-NEXT:    [[TMP5:%.*]] = icmp eq i32 [[TMP4]], 0
; CHECK-NEXT:    br i1 [[TMP5]], label [[BB3]], label [[BB2_NONCHR:%.*]], !prof !16
; CHECK:       bb2.nonchr:
; CHECK-NEXT:    [[V41_NONCHR:%.*]] = add i32 [[TMP0]], 99
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3]]
; CHECK:       bb3:
; CHECK-NEXT:    [[TMP6:%.*]] = phi i32 [ [[V40]], [[BB0]] ], [ [[V40_NONCHR]], [[BB2_NONCHR]] ], [ [[V40_NONCHR]], [[BB1_NONCHR]] ]
; CHECK-NEXT:    [[V42:%.*]] = phi i32 [ [[V41]], [[BB0]] ], [ [[V41_NONCHR]], [[BB2_NONCHR]] ], [ [[V40_NONCHR]], [[BB1_NONCHR]] ]
; CHECK-NEXT:    [[V43:%.*]] = add i32 [[V42]], [[TMP6]]
; CHECK-NEXT:    ret i32 [[V43]]
;
entry:
  %0 = load i32, i32* %i
  %1 = and i32 %0, 1
  %2 = icmp eq i32 %1, 0
  br i1 %2, label %bb1, label %bb0, !prof !15

bb0:
  call void @foo()
  br label %bb1

bb1:
  %v40 = add i32 %0, 44
  %3 = and i32 %0, 2
  %4 = icmp eq i32 %3, 0
  br i1 %4, label %bb3, label %bb2, !prof !15

bb2:
  %v41 = add i32 %0, 99
  call void @foo()
  br label %bb3

bb3:
  %v42 = phi i32 [ %v41, %bb2 ], [ %v40, %bb1 ]
  %v43 = add i32 %v42, %v40
  ret i32 %v43
}

; Two consecutive regions have an entry in the middle of them. No CHR happens.
; Roughly,
; if ((i & 4) == 0) {
;   if (!j)
;     goto bb1
; } else {
;   t0 = (i & 1)
;   if (t0 != 0) // Likely true
;     foo()
;     s = (i & 1) + i
;   }
;  bb1:
;   p = phi i, t0, s
;   if ((i & 2) != 0) // Likely true
;     foo()
;     q = p + 2
; }
; r = phi p, q, i
; return r
; ->
; (no change)
define i32 @test_chr_17(i32 %i, i1 %j) !prof !14 {
; CHECK-LABEL: @test_chr_17(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[V0:%.*]] = and i32 [[I:%.*]], 4
; CHECK-NEXT:    [[V1:%.*]] = icmp eq i32 [[V0]], 0
; CHECK-NEXT:    br i1 [[V1]], label [[BBE:%.*]], label [[BBQ:%.*]]
; CHECK:       bbq:
; CHECK-NEXT:    br i1 [[J:%.*]], label [[BB3:%.*]], label [[BB1:%.*]]
; CHECK:       bbe:
; CHECK-NEXT:    [[TMP0:%.*]] = and i32 [[I]], 1
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i32 [[TMP0]], 0
; CHECK-NEXT:    br i1 [[TMP1]], label [[BB1]], label [[BB0:%.*]], !prof !16
; CHECK:       bb0:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    [[S:%.*]] = add i32 [[TMP0]], [[I]]
; CHECK-NEXT:    br label [[BB1]]
; CHECK:       bb1:
; CHECK-NEXT:    [[P:%.*]] = phi i32 [ [[I]], [[BBQ]] ], [ [[TMP0]], [[BBE]] ], [ [[S]], [[BB0]] ]
; CHECK-NEXT:    [[TMP2:%.*]] = and i32 [[I]], 2
; CHECK-NEXT:    [[TMP3:%.*]] = icmp eq i32 [[TMP2]], 0
; CHECK-NEXT:    br i1 [[TMP3]], label [[BB3]], label [[BB2:%.*]], !prof !16
; CHECK:       bb2:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    [[Q:%.*]] = add i32 [[P]], [[TMP2]]
; CHECK-NEXT:    br label [[BB3]]
; CHECK:       bb3:
; CHECK-NEXT:    [[R:%.*]] = phi i32 [ [[P]], [[BB1]] ], [ [[Q]], [[BB2]] ], [ [[I]], [[BBQ]] ]
; CHECK-NEXT:    ret i32 [[R]]
;
entry:
  %v0 = and i32 %i, 4
  %v1 = icmp eq i32 %v0, 0
  br i1 %v1, label %bbe, label %bbq

bbq:
  br i1 %j, label %bb3, label %bb1

bbe:
  %0 = and i32 %i, 1
  %1 = icmp eq i32 %0, 0
  br i1 %1, label %bb1, label %bb0, !prof !15

bb0:
  call void @foo()
  %s = add i32 %0, %i
  br label %bb1

bb1:
  %p = phi i32 [ %i, %bbq ], [ %0, %bbe ], [ %s, %bb0 ]
  %2 = and i32 %i, 2
  %3 = icmp eq i32 %2, 0
  br i1 %3, label %bb3, label %bb2, !prof !15

bb2:
  call void @foo()
  %q = add i32 %p, %2
  br label %bb3

bb3:
  %r = phi i32 [ %p, %bb1 ], [ %q, %bb2 ], [ %i, %bbq ]
  ret i32 %r
}

; Select + br, there's a loop and we need to update the user of an inserted phi
; at the entry block. This is a regression test for a bug that's fixed.
; Roughly,
; do {
;   inc1 = phi inc2, 0
;   li = *i
;   sum1 = sum0 + 42
;   sum2 = ((li & 1) == 0) ? sum0 : sum1  // Likely false
;   inc2 = inc1 + 1
;   if ((li & 4) != 0) // Likely true
;     sum3 = sum2 + 44
;   sum4 = phi sum1, sum3
; } while (inc2 != 100)  // Likely true (loop back)
; return sum4
; ->
; do {
;   inc1 = phi tmp2, 0  // The first operand needed to be updated
;   li = *i
;   sum1 = sum0 + 42
;   if ((li & 5) == 5) { // Likely true
;     inc2 = inc1 + 1
;     sum3 = sum0 + 86
;   } else {
;     inc2_nc = inc1 + 1
;     if ((li & 4) == 0)
;       sum2_nc = ((li & 1) == 0) ? sum0 : sum1
;       sum3_nc = sum2_nc + 44
;     }
;   tmp2 = phi inc2, in2c_nc
;   sum4 = phi sum3, sum3_nc, sum1
; } while (tmp2 != 100)
; return sum4
define i32 @test_chr_18(i32* %i, i32 %sum0) !prof !14 {
; CHECK-LABEL: @test_chr_18(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[BB0:%.*]]
; CHECK:       bb0:
; CHECK-NEXT:    [[INC1:%.*]] = phi i32 [ [[TMP2:%.*]], [[BB2:%.*]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT:    [[LI:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[SUM1:%.*]] = add i32 [[SUM0:%.*]], 42
; CHECK-NEXT:    [[TMP0:%.*]] = and i32 [[LI]], 5
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i32 [[TMP0]], 5
; CHECK-NEXT:    br i1 [[TMP1]], label [[BB1:%.*]], label [[BB0_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       bb1:
; CHECK-NEXT:    [[SUM3:%.*]] = add i32 [[SUM0]], 86
; CHECK-NEXT:    br label [[BB2]]
; CHECK:       bb0.split.nonchr:
; CHECK-NEXT:    [[A4_NONCHR:%.*]] = and i32 [[LI]], 4
; CHECK-NEXT:    [[CMP4_NONCHR:%.*]] = icmp eq i32 [[A4_NONCHR]], 0
; CHECK-NEXT:    br i1 [[CMP4_NONCHR]], label [[BB2]], label [[BB1_NONCHR:%.*]], !prof !16
; CHECK:       bb1.nonchr:
; CHECK-NEXT:    [[A1:%.*]] = and i32 [[LI]], 1
; CHECK-NEXT:    [[CMP1_NOT:%.*]] = icmp eq i32 [[A1]], 0
; CHECK-NEXT:    [[SUM2_NONCHR:%.*]] = select i1 [[CMP1_NOT]], i32 [[SUM0]], i32 [[SUM1]], !prof !16
; CHECK-NEXT:    [[SUM3_NONCHR:%.*]] = add i32 [[SUM2_NONCHR]], 44
; CHECK-NEXT:    br label [[BB2]]
; CHECK:       bb2:
; CHECK-NEXT:    [[SUM4:%.*]] = phi i32 [ [[SUM3]], [[BB1]] ], [ [[SUM1]], [[BB0_SPLIT_NONCHR]] ], [ [[SUM3_NONCHR]], [[BB1_NONCHR]] ]
; CHECK-NEXT:    [[TMP2]] = add i32 [[INC1]], 1
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32 [[TMP2]], 100
; CHECK-NEXT:    br i1 [[CMP]], label [[BB3:%.*]], label [[BB0]], !prof !16
; CHECK:       bb3:
; CHECK-NEXT:    ret i32 [[SUM4]]
;
entry:
  br label %bb0

bb0:
  %inc1 = phi i32 [ %inc2, %bb2 ], [ 0, %entry ]
  %li = load i32, i32* %i
  %a1 = and i32 %li, 1
  %cmp1 = icmp eq i32 %a1, 0
  %sum1 = add i32 %sum0, 42
  %sum2 = select i1 %cmp1, i32 %sum0, i32 %sum1, !prof !15
  %a4 = and i32 %li, 4
  %cmp4 = icmp eq i32 %a4, 0
  %inc2 = add i32 %inc1, 1
  br i1 %cmp4, label %bb2, label %bb1, !prof !15

bb1:
  %sum3 = add i32 %sum2, 44
  br label %bb2

bb2:
  %sum4 = phi i32 [ %sum1, %bb0 ], [ %sum3, %bb1 ]
  %cmp = icmp eq i32 %inc2, 100
  br i1 %cmp, label %bb3, label %bb0, !prof !15

bb3:
  ret i32 %sum4
}


; Selects + Brs. Those share the condition value, which causes the
; targets/operands of the branch/select to be flipped.
; Roughly,
; t0 = *i
; if ((t0 & 255) != 0) {  // Likely true
;   sum1 = ((t0 & 1) == 0) ? sum0 : (sum0 + 42)  // Likely false
;   sum2 = ((t0 & 1) == 0) ? sum1 : (sum1 + 42)  // Likely false
;   if ((t0 & 1) != 0) { // Likely true
;     sum3 = sum2 + 44
;     sum4 = ((t0 & 8) == 0) ? sum3 : (sum3 + 44) // Likely false
;   }
;   sum5 = phi sum2, sum4
; }
; sum6 = phi sum0, sum5
; return sum6
; ->
; t0 = *i
; if ((t0 & 9) == 9) { // Likely true
;   tmp3 = sum0 + 85  // Dead
;   tmp4 = sum0 + 173
; } else {
;   if ((t0 & 255) != 0) {
;     sum2_nc = ((t0 & 1) == 0) ? sum0 : (sum0 + 85)
;     sum4_nc_v = ((t0 & 8) == 0) ? 44 : 88
;     sum4_nc = add sum2_nc + sum4_nc_v
;   }
; }
; sum6 = phi tmp4, sum0, sum2_nc, sum4_nc
; return sum6
define i32 @test_chr_19(i32* %i, i32 %sum0) !prof !14 {
; CHECK-LABEL: @test_chr_19(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[TMP0]], 9
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[TMP1]], 9
; CHECK-NEXT:    br i1 [[TMP2]], label [[BB0:%.*]], label [[ENTRY_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       bb0:
; CHECK-NEXT:    [[TMP3:%.*]] = add i32 [[SUM0:%.*]], 85
; CHECK-NEXT:    [[TMP4:%.*]] = add i32 [[SUM0]], 173
; CHECK-NEXT:    br label [[BB3:%.*]]
; CHECK:       entry.split.nonchr:
; CHECK-NEXT:    [[TMP5:%.*]] = and i32 [[TMP0]], 255
; CHECK-NEXT:    [[DOTNOT:%.*]] = icmp eq i32 [[TMP5]], 0
; CHECK-NEXT:    br i1 [[DOTNOT]], label [[BB3]], label [[BB0_NONCHR:%.*]], !prof !16
; CHECK:       bb0.nonchr:
; CHECK-NEXT:    [[TMP6:%.*]] = and i32 [[TMP0]], 1
; CHECK-NEXT:    [[TMP7:%.*]] = icmp eq i32 [[TMP6]], 0
; CHECK-NEXT:    [[TMP8:%.*]] = add i32 [[SUM0]], 85
; CHECK-NEXT:    [[SUM2_NONCHR:%.*]] = select i1 [[TMP7]], i32 [[SUM0]], i32 [[TMP8]], !prof !16
; CHECK-NEXT:    [[TMP9:%.*]] = and i32 [[TMP0]], 8
; CHECK-NEXT:    [[TMP10:%.*]] = icmp eq i32 [[TMP9]], 0
; CHECK-NEXT:    [[SUM4_NONCHR_V:%.*]] = select i1 [[TMP10]], i32 44, i32 88
; CHECK-NEXT:    [[SUM4_NONCHR:%.*]] = add i32 [[SUM2_NONCHR]], [[SUM4_NONCHR_V]]
; CHECK-NEXT:    [[SUM5_NONCHR:%.*]] = select i1 [[TMP7]], i32 [[SUM2_NONCHR]], i32 [[SUM4_NONCHR]], !prof !16
; CHECK-NEXT:    br label [[BB3]]
; CHECK:       bb3:
; CHECK-NEXT:    [[SUM6:%.*]] = phi i32 [ [[TMP4]], [[BB0]] ], [ [[SUM0]], [[ENTRY_SPLIT_NONCHR]] ], [ [[SUM5_NONCHR]], [[BB0_NONCHR]] ]
; CHECK-NEXT:    ret i32 [[SUM6]]
;
entry:
  %0 = load i32, i32* %i
  %1 = and i32 %0, 255
  %2 = icmp eq i32 %1, 0
  br i1 %2, label %bb3, label %bb0, !prof !15

bb0:
  %3 = and i32 %0, 1
  %4 = icmp eq i32 %3, 0
  %5 = add i32 %sum0, 42
  %sum1 = select i1 %4, i32 %sum0, i32 %5, !prof !15
  %6 = add i32 %sum1, 43
  %sum2 = select i1 %4, i32 %sum1, i32 %6, !prof !15
  br i1 %4, label %bb2, label %bb1, !prof !15

bb1:
  %sum3 = add i32 %sum2, 44
  %7 = and i32 %0, 8
  %8 = icmp eq i32 %7, 0
  %9 = add i32 %sum3, 44
  %sum4 = select i1 %8, i32 %sum3, i32 %9, !prof !15
  br label %bb2

bb2:
  %sum5 = phi i32 [ %sum2, %bb0 ], [ %sum4, %bb1 ]
  br label %bb3

bb3:
  %sum6 = phi i32 [ %sum0, %entry ], [ %sum5, %bb2 ]
  ret i32 %sum6
}

; Selects. The exit block, which belongs to the top-level region, has a select
; and causes the top-level region to be the outermost CHR scope with the
; subscope that includes the entry block with two selects. The outermost CHR
; scope doesn't see the selects in the entry block as the entry block is in the
; subscope and incorrectly sets the CHR hoist point to the branch rather than
; the first select in the entry block and causes the CHR'ed selects ("select i1
; false...") to incorrectly position above the CHR branch. This is testing
; against a quirk of how the region analysis handles the entry block.
; Roughly,
; i0 = *i
; sum2 = ((i0 & 2) == 0) ? sum0 : (sum0 + 43) // Likely false
; sum3 = ((i0 & 4) == 0) ? sum2 : (sum2 + 44) // Likely false
; if (j)
;   foo()
; i5 = *i
; v13 = (i5 == 44) ? i5 : sum3
; return v13
; ->
; i0 = *i
; if ((i0 & 6) != 6) { // Likely true
;   v9 = sum0 + 87
;   if (j)
;     foo()
; } else {
;   sum2.nc = ((i0 & 2) == 0) ? sum0 : (sum0 + 43)
;   sum3.nc = ((i0 & 4) == 0) ? sum2.nc : (sum2.nc + 44)
;   if (j)
;     foo()
; }
; t2 = phi v9, sum3.nc
; i5 = *i
; v13 = (i5 == 44) ? 44 : t2
; return v13
define i32 @test_chr_20(i32* %i, i32 %sum0, i1 %j) !prof !14 {
; CHECK-LABEL: @test_chr_20(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[I0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[TMP0:%.*]] = and i32 [[I0]], 6
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i32 [[TMP0]], 6
; CHECK-NEXT:    br i1 [[TMP1]], label [[ENTRY_SPLIT:%.*]], label [[ENTRY_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       entry.split:
; CHECK-NEXT:    [[V9:%.*]] = add i32 [[SUM0:%.*]], 87
; CHECK-NEXT:    br i1 [[J:%.*]], label [[BB1:%.*]], label [[BB4:%.*]]
; CHECK:       bb1:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB4]]
; CHECK:       entry.split.nonchr:
; CHECK-NEXT:    [[V8:%.*]] = add i32 [[SUM0]], 43
; CHECK-NEXT:    [[V3:%.*]] = and i32 [[I0]], 2
; CHECK-NEXT:    [[V4_NOT:%.*]] = icmp eq i32 [[V3]], 0
; CHECK-NEXT:    [[SUM2_NONCHR:%.*]] = select i1 [[V4_NOT]], i32 [[SUM0]], i32 [[V8]], !prof !16
; CHECK-NEXT:    [[V6_NONCHR:%.*]] = and i32 [[I0]], 4
; CHECK-NEXT:    [[V5_NONCHR:%.*]] = icmp eq i32 [[V6_NONCHR]], 0
; CHECK-NEXT:    [[V9_NONCHR:%.*]] = add i32 [[SUM2_NONCHR]], 44
; CHECK-NEXT:    [[SUM3_NONCHR:%.*]] = select i1 [[V5_NONCHR]], i32 [[SUM2_NONCHR]], i32 [[V9_NONCHR]], !prof !16
; CHECK-NEXT:    br i1 [[J]], label [[BB1_NONCHR:%.*]], label [[BB4]]
; CHECK:       bb1.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB4]]
; CHECK:       bb4:
; CHECK-NEXT:    [[TMP2:%.*]] = phi i32 [ [[V9]], [[BB1]] ], [ [[V9]], [[ENTRY_SPLIT]] ], [ [[SUM3_NONCHR]], [[BB1_NONCHR]] ], [ [[SUM3_NONCHR]], [[ENTRY_SPLIT_NONCHR]] ]
; CHECK-NEXT:    [[I5:%.*]] = load i32, i32* [[I]], align 4
; CHECK-NEXT:    [[V12:%.*]] = icmp eq i32 [[I5]], 44
; CHECK-NEXT:    [[V13:%.*]] = select i1 [[V12]], i32 44, i32 [[TMP2]], !prof !16
; CHECK-NEXT:    ret i32 [[V13]]
;
entry:
  %i0 = load i32, i32* %i
  %v3 = and i32 %i0, 2
  %v4 = icmp eq i32 %v3, 0
  %v8 = add i32 %sum0, 43
  %sum2 = select i1 %v4, i32 %sum0, i32 %v8, !prof !15
  %v6 = and i32 %i0, 4
  %v5 = icmp eq i32 %v6, 0
  %v9 = add i32 %sum2, 44
  %sum3 = select i1 %v5, i32 %sum2, i32 %v9, !prof !15
  br i1 %j, label %bb1, label %bb4

bb1:
  call void @foo()
  br label %bb4

bb4:
  %i5 = load i32, i32* %i
  %v12 = icmp eq i32 %i5, 44
  %v13 = select i1 %v12, i32 %i5, i32 %sum3, !prof !15
  ret i32 %v13
}

; Test the case where two scopes share a common instruction to hoist (%cmp.i).
; Two scopes would hoist it to their hoist points, but since the outer scope
; hoists (entry/bb6-9) it first to its hoist point, it'd be wrong (causing bad
; IR) for the inner scope (bb1-4) to hoist the same instruction to its hoist
; point.
; Roughly,
; if (j != k) {
;   if (i != 2)
;     foo();
;   cmp.i = i == 86
;   if (!cmp.i)
;     foo();
;   if (j != i)
;     foo();
;   if (!cmp.i)
;     foo();
;  }
;  return 45;
define i32 @test_chr_21(i64 %i, i64 %k, i64 %j) !prof !14 {
; CHECK-LABEL: @test_chr_21(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP0:%.*]] = icmp ne i64 [[J:%.*]], [[K:%.*]]
; CHECK-NEXT:    [[CMP3:%.*]] = icmp ne i64 [[J]], [[I:%.*]]
; CHECK-NEXT:    [[CMP_I:%.*]] = icmp ne i64 [[I]], 86
; CHECK-NEXT:    [[TMP0:%.*]] = and i1 [[CMP0]], [[CMP3]]
; CHECK-NEXT:    [[TMP1:%.*]] = and i1 [[TMP0]], [[CMP_I]]
; CHECK-NEXT:    br i1 [[TMP1]], label [[BB1:%.*]], label [[ENTRY_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       bb1:
; CHECK-NEXT:    [[CMP2:%.*]] = icmp ne i64 [[I]], 2
; CHECK-NEXT:    switch i64 [[I]], label [[BB2:%.*]] [
; CHECK-NEXT:    i64 2, label [[BB3_NONCHR2:%.*]]
; CHECK-NEXT:    i64 86, label [[BB2_NONCHR1:%.*]]
; CHECK-NEXT:    ], !prof !20
; CHECK:       bb2:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB7:%.*]]
; CHECK:       bb2.nonchr1:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3_NONCHR2]]
; CHECK:       bb3.nonchr2:
; CHECK-NEXT:    br i1 [[CMP_I]], label [[BB4_NONCHR3:%.*]], label [[BB7]], !prof !18
; CHECK:       bb4.nonchr3:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB7]]
; CHECK:       bb7:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB10:%.*]]
; CHECK:       entry.split.nonchr:
; CHECK-NEXT:    br i1 [[CMP0]], label [[BB1_NONCHR:%.*]], label [[BB10]], !prof !18
; CHECK:       bb1.nonchr:
; CHECK-NEXT:    [[CMP2_NONCHR:%.*]] = icmp eq i64 [[I]], 2
; CHECK-NEXT:    br i1 [[CMP2_NONCHR]], label [[BB3_NONCHR:%.*]], label [[BB2_NONCHR:%.*]], !prof !16
; CHECK:       bb3.nonchr:
; CHECK-NEXT:    [[CMP_I_NONCHR:%.*]] = icmp eq i64 [[I]], 86
; CHECK-NEXT:    br i1 [[CMP_I_NONCHR]], label [[BB6_NONCHR:%.*]], label [[BB4_NONCHR:%.*]], !prof !16
; CHECK:       bb6.nonchr:
; CHECK-NEXT:    [[CMP3_NONCHR:%.*]] = icmp eq i64 [[J]], [[I]]
; CHECK-NEXT:    br i1 [[CMP3_NONCHR]], label [[BB8_NONCHR:%.*]], label [[BB7_NONCHR:%.*]], !prof !16
; CHECK:       bb8.nonchr:
; CHECK-NEXT:    br i1 [[CMP_I_NONCHR]], label [[BB10]], label [[BB9_NONCHR:%.*]], !prof !16
; CHECK:       bb9.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB10]]
; CHECK:       bb7.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB8_NONCHR]]
; CHECK:       bb4.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB6_NONCHR]]
; CHECK:       bb2.nonchr:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3_NONCHR]]
; CHECK:       bb10:
; CHECK-NEXT:    ret i32 45
;
entry:
  %cmp0 = icmp eq i64 %j, %k
  br i1 %cmp0, label %bb10, label %bb1, !prof !15

bb1:
  %cmp2 = icmp eq i64 %i, 2
  br i1 %cmp2, label %bb3, label %bb2, !prof !15

bb2:
  call void @foo()
  br label %bb3

bb3:
  %cmp.i = icmp eq i64 %i, 86
  br i1 %cmp.i, label %bb5, label %bb4, !prof !15

bb4:
  call void @foo()
  br label %bb5

bb5:
  br label %bb6

bb6:
  %cmp3 = icmp eq i64 %j, %i
  br i1 %cmp3, label %bb8, label %bb7, !prof !15

bb7:
  call void @foo()
  br label %bb8

bb8:
  br i1 %cmp.i, label %bb10, label %bb9, !prof !15

bb9:
  call void @foo()
  br label %bb10

bb10:
  ret i32 45
}

; Test a case with a really long use-def chains. This test checks that it's not
; really slow and doesn't appear to be hanging.
define i64 @test_chr_22(i1 %i, i64* %j, i64 %v0) !prof !14 {
; CHECK-LABEL: @test_chr_22(
; CHECK-NEXT:  bb0:
; CHECK-NEXT:    [[REASS_ADD:%.*]] = shl i64 [[V0:%.*]], 1
; CHECK-NEXT:    [[V2:%.*]] = add i64 [[REASS_ADD]], 3
; CHECK-NEXT:    [[C1:%.*]] = icmp slt i64 [[V2]], 100
; CHECK-NEXT:    br i1 [[C1]], label [[BB0_SPLIT:%.*]], label [[BB0_SPLIT_NONCHR:%.*]], !prof !15
; CHECK:       bb0.split:
; CHECK-NEXT:    [[V299:%.*]] = mul i64 [[V2]], 7860086430977039991
; CHECK-NEXT:    store i64 [[V299]], i64* [[J:%.*]], align 4
; CHECK-NEXT:    ret i64 99
; CHECK:       bb0.split.nonchr:
; CHECK-NEXT:    [[V299_NONCHR:%.*]] = mul i64 [[V2]], 7860086430977039991
; CHECK-NEXT:    store i64 [[V299_NONCHR]], i64* [[J]], align 4
; CHECK-NEXT:    ret i64 99
;
bb0:
  %v1 = add i64 %v0, 3
  %v2 = add i64 %v1, %v0
  %c1 = icmp sgt i64 %v2, 99
  %v3 = select i1 %c1, i64 %v1, i64 %v2, !prof !15
  %v4 = add i64 %v2, %v2
  %v5 = add i64 %v4, %v2
  %v6 = add i64 %v5, %v4
  %v7 = add i64 %v6, %v5
  %v8 = add i64 %v7, %v6
  %v9 = add i64 %v8, %v7
  %v10 = add i64 %v9, %v8
  %v11 = add i64 %v10, %v9
  %v12 = add i64 %v11, %v10
  %v13 = add i64 %v12, %v11
  %v14 = add i64 %v13, %v12
  %v15 = add i64 %v14, %v13
  %v16 = add i64 %v15, %v14
  %v17 = add i64 %v16, %v15
  %v18 = add i64 %v17, %v16
  %v19 = add i64 %v18, %v17
  %v20 = add i64 %v19, %v18
  %v21 = add i64 %v20, %v19
  %v22 = add i64 %v21, %v20
  %v23 = add i64 %v22, %v21
  %v24 = add i64 %v23, %v22
  %v25 = add i64 %v24, %v23
  %v26 = add i64 %v25, %v24
  %v27 = add i64 %v26, %v25
  %v28 = add i64 %v27, %v26
  %v29 = add i64 %v28, %v27
  %v30 = add i64 %v29, %v28
  %v31 = add i64 %v30, %v29
  %v32 = add i64 %v31, %v30
  %v33 = add i64 %v32, %v31
  %v34 = add i64 %v33, %v32
  %v35 = add i64 %v34, %v33
  %v36 = add i64 %v35, %v34
  %v37 = add i64 %v36, %v35
  %v38 = add i64 %v37, %v36
  %v39 = add i64 %v38, %v37
  %v40 = add i64 %v39, %v38
  %v41 = add i64 %v40, %v39
  %v42 = add i64 %v41, %v40
  %v43 = add i64 %v42, %v41
  %v44 = add i64 %v43, %v42
  %v45 = add i64 %v44, %v43
  %v46 = add i64 %v45, %v44
  %v47 = add i64 %v46, %v45
  %v48 = add i64 %v47, %v46
  %v49 = add i64 %v48, %v47
  %v50 = add i64 %v49, %v48
  %v51 = add i64 %v50, %v49
  %v52 = add i64 %v51, %v50
  %v53 = add i64 %v52, %v51
  %v54 = add i64 %v53, %v52
  %v55 = add i64 %v54, %v53
  %v56 = add i64 %v55, %v54
  %v57 = add i64 %v56, %v55
  %v58 = add i64 %v57, %v56
  %v59 = add i64 %v58, %v57
  %v60 = add i64 %v59, %v58
  %v61 = add i64 %v60, %v59
  %v62 = add i64 %v61, %v60
  %v63 = add i64 %v62, %v61
  %v64 = add i64 %v63, %v62
  %v65 = add i64 %v64, %v63
  %v66 = add i64 %v65, %v64
  %v67 = add i64 %v66, %v65
  %v68 = add i64 %v67, %v66
  %v69 = add i64 %v68, %v67
  %v70 = add i64 %v69, %v68
  %v71 = add i64 %v70, %v69
  %v72 = add i64 %v71, %v70
  %v73 = add i64 %v72, %v71
  %v74 = add i64 %v73, %v72
  %v75 = add i64 %v74, %v73
  %v76 = add i64 %v75, %v74
  %v77 = add i64 %v76, %v75
  %v78 = add i64 %v77, %v76
  %v79 = add i64 %v78, %v77
  %v80 = add i64 %v79, %v78
  %v81 = add i64 %v80, %v79
  %v82 = add i64 %v81, %v80
  %v83 = add i64 %v82, %v81
  %v84 = add i64 %v83, %v82
  %v85 = add i64 %v84, %v83
  %v86 = add i64 %v85, %v84
  %v87 = add i64 %v86, %v85
  %v88 = add i64 %v87, %v86
  %v89 = add i64 %v88, %v87
  %v90 = add i64 %v89, %v88
  %v91 = add i64 %v90, %v89
  %v92 = add i64 %v91, %v90
  %v93 = add i64 %v92, %v91
  %v94 = add i64 %v93, %v92
  %v95 = add i64 %v94, %v93
  %v96 = add i64 %v95, %v94
  %v97 = add i64 %v96, %v95
  %v98 = add i64 %v97, %v96
  %v99 = add i64 %v98, %v97
  %v100 = add i64 %v99, %v98
  %v101 = add i64 %v100, %v99
  %v102 = add i64 %v101, %v100
  %v103 = add i64 %v102, %v101
  %v104 = add i64 %v103, %v102
  %v105 = add i64 %v104, %v103
  %v106 = add i64 %v105, %v104
  %v107 = add i64 %v106, %v105
  %v108 = add i64 %v107, %v106
  %v109 = add i64 %v108, %v107
  %v110 = add i64 %v109, %v108
  %v111 = add i64 %v110, %v109
  %v112 = add i64 %v111, %v110
  %v113 = add i64 %v112, %v111
  %v114 = add i64 %v113, %v112
  %v115 = add i64 %v114, %v113
  %v116 = add i64 %v115, %v114
  %v117 = add i64 %v116, %v115
  %v118 = add i64 %v117, %v116
  %v119 = add i64 %v118, %v117
  %v120 = add i64 %v119, %v118
  %v121 = add i64 %v120, %v119
  %v122 = add i64 %v121, %v120
  %v123 = add i64 %v122, %v121
  %v124 = add i64 %v123, %v122
  %v125 = add i64 %v124, %v123
  %v126 = add i64 %v125, %v124
  %v127 = add i64 %v126, %v125
  %v128 = add i64 %v127, %v126
  %v129 = add i64 %v128, %v127
  %v130 = add i64 %v129, %v128
  %v131 = add i64 %v130, %v129
  %v132 = add i64 %v131, %v130
  %v133 = add i64 %v132, %v131
  %v134 = add i64 %v133, %v132
  %v135 = add i64 %v134, %v133
  %v136 = add i64 %v135, %v134
  %v137 = add i64 %v136, %v135
  %v138 = add i64 %v137, %v136
  %v139 = add i64 %v138, %v137
  %v140 = add i64 %v139, %v138
  %v141 = add i64 %v140, %v139
  %v142 = add i64 %v141, %v140
  %v143 = add i64 %v142, %v141
  %v144 = add i64 %v143, %v142
  %v145 = add i64 %v144, %v143
  %v146 = add i64 %v145, %v144
  %v147 = add i64 %v146, %v145
  %v148 = add i64 %v147, %v146
  %v149 = add i64 %v148, %v147
  %v150 = add i64 %v149, %v148
  %v151 = add i64 %v150, %v149
  %v152 = add i64 %v151, %v150
  %v153 = add i64 %v152, %v151
  %v154 = add i64 %v153, %v152
  %v155 = add i64 %v154, %v153
  %v156 = add i64 %v155, %v154
  %v157 = add i64 %v156, %v155
  %v158 = add i64 %v157, %v156
  %v159 = add i64 %v158, %v157
  %v160 = add i64 %v159, %v158
  %v161 = add i64 %v160, %v159
  %v162 = add i64 %v161, %v160
  %v163 = add i64 %v162, %v161
  %v164 = add i64 %v163, %v162
  %v165 = add i64 %v164, %v163
  %v166 = add i64 %v165, %v164
  %v167 = add i64 %v166, %v165
  %v168 = add i64 %v167, %v166
  %v169 = add i64 %v168, %v167
  %v170 = add i64 %v169, %v168
  %v171 = add i64 %v170, %v169
  %v172 = add i64 %v171, %v170
  %v173 = add i64 %v172, %v171
  %v174 = add i64 %v173, %v172
  %v175 = add i64 %v174, %v173
  %v176 = add i64 %v175, %v174
  %v177 = add i64 %v176, %v175
  %v178 = add i64 %v177, %v176
  %v179 = add i64 %v178, %v177
  %v180 = add i64 %v179, %v178
  %v181 = add i64 %v180, %v179
  %v182 = add i64 %v181, %v180
  %v183 = add i64 %v182, %v181
  %v184 = add i64 %v183, %v182
  %v185 = add i64 %v184, %v183
  %v186 = add i64 %v185, %v184
  %v187 = add i64 %v186, %v185
  %v188 = add i64 %v187, %v186
  %v189 = add i64 %v188, %v187
  %v190 = add i64 %v189, %v188
  %v191 = add i64 %v190, %v189
  %v192 = add i64 %v191, %v190
  %v193 = add i64 %v192, %v191
  %v194 = add i64 %v193, %v192
  %v195 = add i64 %v194, %v193
  %v196 = add i64 %v195, %v194
  %v197 = add i64 %v196, %v195
  %v198 = add i64 %v197, %v196
  %v199 = add i64 %v198, %v197
  %v200 = add i64 %v199, %v198
  %v201 = add i64 %v200, %v199
  %v202 = add i64 %v201, %v200
  %v203 = add i64 %v202, %v201
  %v204 = add i64 %v203, %v202
  %v205 = add i64 %v204, %v203
  %v206 = add i64 %v205, %v204
  %v207 = add i64 %v206, %v205
  %v208 = add i64 %v207, %v206
  %v209 = add i64 %v208, %v207
  %v210 = add i64 %v209, %v208
  %v211 = add i64 %v210, %v209
  %v212 = add i64 %v211, %v210
  %v213 = add i64 %v212, %v211
  %v214 = add i64 %v213, %v212
  %v215 = add i64 %v214, %v213
  %v216 = add i64 %v215, %v214
  %v217 = add i64 %v216, %v215
  %v218 = add i64 %v217, %v216
  %v219 = add i64 %v218, %v217
  %v220 = add i64 %v219, %v218
  %v221 = add i64 %v220, %v219
  %v222 = add i64 %v221, %v220
  %v223 = add i64 %v222, %v221
  %v224 = add i64 %v223, %v222
  %v225 = add i64 %v224, %v223
  %v226 = add i64 %v225, %v224
  %v227 = add i64 %v226, %v225
  %v228 = add i64 %v227, %v226
  %v229 = add i64 %v228, %v227
  %v230 = add i64 %v229, %v228
  %v231 = add i64 %v230, %v229
  %v232 = add i64 %v231, %v230
  %v233 = add i64 %v232, %v231
  %v234 = add i64 %v233, %v232
  %v235 = add i64 %v234, %v233
  %v236 = add i64 %v235, %v234
  %v237 = add i64 %v236, %v235
  %v238 = add i64 %v237, %v236
  %v239 = add i64 %v238, %v237
  %v240 = add i64 %v239, %v238
  %v241 = add i64 %v240, %v239
  %v242 = add i64 %v241, %v240
  %v243 = add i64 %v242, %v241
  %v244 = add i64 %v243, %v242
  %v245 = add i64 %v244, %v243
  %v246 = add i64 %v245, %v244
  %v247 = add i64 %v246, %v245
  %v248 = add i64 %v247, %v246
  %v249 = add i64 %v248, %v247
  %v250 = add i64 %v249, %v248
  %v251 = add i64 %v250, %v249
  %v252 = add i64 %v251, %v250
  %v253 = add i64 %v252, %v251
  %v254 = add i64 %v253, %v252
  %v255 = add i64 %v254, %v253
  %v256 = add i64 %v255, %v254
  %v257 = add i64 %v256, %v255
  %v258 = add i64 %v257, %v256
  %v259 = add i64 %v258, %v257
  %v260 = add i64 %v259, %v258
  %v261 = add i64 %v260, %v259
  %v262 = add i64 %v261, %v260
  %v263 = add i64 %v262, %v261
  %v264 = add i64 %v263, %v262
  %v265 = add i64 %v264, %v263
  %v266 = add i64 %v265, %v264
  %v267 = add i64 %v266, %v265
  %v268 = add i64 %v267, %v266
  %v269 = add i64 %v268, %v267
  %v270 = add i64 %v269, %v268
  %v271 = add i64 %v270, %v269
  %v272 = add i64 %v271, %v270
  %v273 = add i64 %v272, %v271
  %v274 = add i64 %v273, %v272
  %v275 = add i64 %v274, %v273
  %v276 = add i64 %v275, %v274
  %v277 = add i64 %v276, %v275
  %v278 = add i64 %v277, %v276
  %v279 = add i64 %v278, %v277
  %v280 = add i64 %v279, %v278
  %v281 = add i64 %v280, %v279
  %v282 = add i64 %v281, %v280
  %v283 = add i64 %v282, %v281
  %v284 = add i64 %v283, %v282
  %v285 = add i64 %v284, %v283
  %v286 = add i64 %v285, %v284
  %v287 = add i64 %v286, %v285
  %v288 = add i64 %v287, %v286
  %v289 = add i64 %v288, %v287
  %v290 = add i64 %v289, %v288
  %v291 = add i64 %v290, %v289
  %v292 = add i64 %v291, %v290
  %v293 = add i64 %v292, %v291
  %v294 = add i64 %v293, %v292
  %v295 = add i64 %v294, %v293
  %v296 = add i64 %v295, %v294
  %v297 = add i64 %v296, %v295
  %v298 = add i64 %v297, %v296
  %v299 = add i64 %v298, %v297
  %v300 = add i64 %v299, %v298
  %v301 = icmp eq i64 %v300, 100
  %v302 = select i1 %v301, i64 %v298, i64 %v299, !prof !15
  store i64 %v302, i64* %j
  ret i64 99
}

; Test a case with a really long use-def chains. This test checks that it's not
; really slow and doesn't appear to be hanging. This is different from
; test_chr_22 in that it has nested control structures (multiple scopes) and
; covers additional code.
define i64 @test_chr_23(i64 %v0) !prof !14 {
; CHECK-LABEL: @test_chr_23(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = mul i64 [[V0:%.*]], 50
; CHECK-NEXT:    [[V10_NOT:%.*]] = icmp eq i64 [[TMP0]], -50
; CHECK-NEXT:    ret i64 99
;
entry:
  %v1 = add i64 %v0, 3
  %v2 = add i64 %v1, %v1
  %v3 = add i64 %v2, %v1
  %v4 = add i64 %v2, %v3
  %v5 = add i64 %v4, %v2
  %v6 = add i64 %v5, %v4
  %v7 = add i64 %v6, %v5
  %v8 = add i64 %v7, %v6
  %v9 = add i64 %v8, %v7
  %v10 = icmp eq i64 %v9, 100
  br i1 %v10, label %body, label %end, !prof !15

body:
  %v1_0 = add i64 %v9, 3
  %v2_0 = add i64 %v1_0, %v1_0
  %v3_0 = add i64 %v2_0, %v1_0
  %v4_0 = add i64 %v2_0, %v3_0
  %v5_0 = add i64 %v4_0, %v2_0
  %v6_0 = add i64 %v5_0, %v4_0
  %v7_0 = add i64 %v6_0, %v5_0
  %v8_0 = add i64 %v7_0, %v6_0
  %v9_0 = add i64 %v8_0, %v7_0
  %v10_0 = icmp eq i64 %v9_0, 100
  br i1 %v10_0, label %body.1, label %end, !prof !15

body.1:
  %v1_1 = add i64 %v9_0, 3
  %v2_1 = add i64 %v1_1, %v1_1
  %v3_1 = add i64 %v2_1, %v1_1
  %v4_1 = add i64 %v2_1, %v3_1
  %v5_1 = add i64 %v4_1, %v2_1
  %v6_1 = add i64 %v5_1, %v4_1
  %v7_1 = add i64 %v6_1, %v5_1
  %v8_1 = add i64 %v7_1, %v6_1
  %v9_1 = add i64 %v8_1, %v7_1
  %v10_1 = icmp eq i64 %v9_1, 100
  br i1 %v10_1, label %body.2, label %end, !prof !15

body.2:
  %v1_2 = add i64 %v9_1, 3
  %v2_2 = add i64 %v1_2, %v1_2
  %v3_2 = add i64 %v2_2, %v1_2
  %v4_2 = add i64 %v2_2, %v3_2
  %v5_2 = add i64 %v4_2, %v2_2
  %v6_2 = add i64 %v5_2, %v4_2
  %v7_2 = add i64 %v6_2, %v5_2
  %v8_2 = add i64 %v7_2, %v6_2
  %v9_2 = add i64 %v8_2, %v7_2
  %v10_2 = icmp eq i64 %v9_2, 100
  br i1 %v10_2, label %body.3, label %end, !prof !15

body.3:
  %v1_3 = add i64 %v9_2, 3
  %v2_3 = add i64 %v1_3, %v1_3
  %v3_3 = add i64 %v2_3, %v1_3
  %v4_3 = add i64 %v2_3, %v3_3
  %v5_3 = add i64 %v4_3, %v2_3
  %v6_3 = add i64 %v5_3, %v4_3
  %v7_3 = add i64 %v6_3, %v5_3
  %v8_3 = add i64 %v7_3, %v6_3
  %v9_3 = add i64 %v8_3, %v7_3
  %v10_3 = icmp eq i64 %v9_3, 100
  br i1 %v10_3, label %body.4, label %end, !prof !15

body.4:
  %v1_4 = add i64 %v9_3, 3
  %v2_4 = add i64 %v1_4, %v1_4
  %v3_4 = add i64 %v2_4, %v1_4
  %v4_4 = add i64 %v2_4, %v3_4
  %v5_4 = add i64 %v4_4, %v2_4
  %v6_4 = add i64 %v5_4, %v4_4
  %v7_4 = add i64 %v6_4, %v5_4
  %v8_4 = add i64 %v7_4, %v6_4
  %v9_4 = add i64 %v8_4, %v7_4
  %v10_4 = icmp eq i64 %v9_4, 100
  br i1 %v10_4, label %body.5, label %end, !prof !15

body.5:
  %v1_5 = add i64 %v9_4, 3
  %v2_5 = add i64 %v1_5, %v1_5
  %v3_5 = add i64 %v2_5, %v1_5
  %v4_5 = add i64 %v2_5, %v3_5
  %v5_5 = add i64 %v4_5, %v2_5
  %v6_5 = add i64 %v5_5, %v4_5
  %v7_5 = add i64 %v6_5, %v5_5
  %v8_5 = add i64 %v7_5, %v6_5
  %v9_5 = add i64 %v8_5, %v7_5
  %v10_5 = icmp eq i64 %v9_5, 100
  br i1 %v10_5, label %body.6, label %end, !prof !15

body.6:
  %v1_6 = add i64 %v9_5, 3
  %v2_6 = add i64 %v1_6, %v1_6
  %v3_6 = add i64 %v2_6, %v1_6
  %v4_6 = add i64 %v2_6, %v3_6
  %v5_6 = add i64 %v4_6, %v2_6
  %v6_6 = add i64 %v5_6, %v4_6
  %v7_6 = add i64 %v6_6, %v5_6
  %v8_6 = add i64 %v7_6, %v6_6
  %v9_6 = add i64 %v8_6, %v7_6
  %v10_6 = icmp eq i64 %v9_6, 100
  br i1 %v10_6, label %body.7, label %end, !prof !15

body.7:
  %v1_7 = add i64 %v9_6, 3
  %v2_7 = add i64 %v1_7, %v1_7
  %v3_7 = add i64 %v2_7, %v1_7
  %v4_7 = add i64 %v2_7, %v3_7
  %v5_7 = add i64 %v4_7, %v2_7
  %v6_7 = add i64 %v5_7, %v4_7
  %v7_7 = add i64 %v6_7, %v5_7
  %v8_7 = add i64 %v7_7, %v6_7
  %v9_7 = add i64 %v8_7, %v7_7
  %v10_7 = icmp eq i64 %v9_7, 100
  br i1 %v10_7, label %body.8, label %end, !prof !15

body.8:
  %v1_8 = add i64 %v9_7, 3
  %v2_8 = add i64 %v1_8, %v1_8
  %v3_8 = add i64 %v2_8, %v1_8
  %v4_8 = add i64 %v2_8, %v3_8
  %v5_8 = add i64 %v4_8, %v2_8
  %v6_8 = add i64 %v5_8, %v4_8
  %v7_8 = add i64 %v6_8, %v5_8
  %v8_8 = add i64 %v7_8, %v6_8
  %v9_8 = add i64 %v8_8, %v7_8
  %v10_8 = icmp eq i64 %v9_8, 100
  br i1 %v10_8, label %body.9, label %end, !prof !15

body.9:
  %v1_9 = add i64 %v9_8, 3
  %v2_9 = add i64 %v1_9, %v1_9
  %v3_9 = add i64 %v2_9, %v1_9
  %v4_9 = add i64 %v2_9, %v3_9
  %v5_9 = add i64 %v4_9, %v2_9
  %v6_9 = add i64 %v5_9, %v4_9
  %v7_9 = add i64 %v6_9, %v5_9
  %v8_9 = add i64 %v7_9, %v6_9
  %v9_9 = add i64 %v8_9, %v7_9
  br label %end

end:
  ret i64 99
}

; Test to not crash upon a 0:0 branch_weight metadata.
define void @test_chr_24(i32* %i) !prof !14 {
; CHECK-LABEL: @test_chr_24(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, i32* [[I:%.*]], align 4
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[TMP0]], 1
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[TMP1]], 0
; CHECK-NEXT:    br i1 [[TMP2]], label [[BB1:%.*]], label [[BB0:%.*]], !prof !21
; CHECK:       bb0:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB1]]
; CHECK:       bb1:
; CHECK-NEXT:    [[TMP3:%.*]] = and i32 [[TMP0]], 2
; CHECK-NEXT:    [[TMP4:%.*]] = icmp eq i32 [[TMP3]], 0
; CHECK-NEXT:    br i1 [[TMP4]], label [[BB3:%.*]], label [[BB2:%.*]], !prof !21
; CHECK:       bb2:
; CHECK-NEXT:    call void @foo()
; CHECK-NEXT:    br label [[BB3]]
; CHECK:       bb3:
; CHECK-NEXT:    ret void
;
entry:
  %0 = load i32, i32* %i
  %1 = and i32 %0, 1
  %2 = icmp eq i32 %1, 0
  br i1 %2, label %bb1, label %bb0, !prof !17

bb0:
  call void @foo()
  br label %bb1

bb1:
  %3 = and i32 %0, 2
  %4 = icmp eq i32 %3, 0
  br i1 %4, label %bb3, label %bb2, !prof !17

bb2:
  call void @foo()
  br label %bb3

bb3:
  ret void
}

!llvm.module.flags = !{!0}
!0 = !{i32 1, !"ProfileSummary", !1}
!1 = !{!2, !3, !4, !5, !6, !7, !8, !9}
!2 = !{!"ProfileFormat", !"InstrProf"}
!3 = !{!"TotalCount", i64 10000}
!4 = !{!"MaxCount", i64 10}
!5 = !{!"MaxInternalCount", i64 1}
!6 = !{!"MaxFunctionCount", i64 1000}
!7 = !{!"NumCounts", i64 3}
!8 = !{!"NumFunctions", i64 3}
!9 = !{!"DetailedSummary", !10}
!10 = !{!11, !12, !13}
!11 = !{i32 10000, i64 100, i32 1}
!12 = !{i32 999000, i64 100, i32 1}
!13 = !{i32 999999, i64 1, i32 2}

!14 = !{!"function_entry_count", i64 100}
!15 = !{!"branch_weights", i32 0, i32 1}
!16 = !{!"branch_weights", i32 1, i32 1}
!17 = !{!"branch_weights", i32 0, i32 0}
; CHECK: !15 = !{!"branch_weights", i32 1000, i32 0}
; CHECK: !16 = !{!"branch_weights", i32 0, i32 1}
; CHECK: !17 = !{!"branch_weights", i32 1, i32 1}
; CHECK: !18 = !{!"branch_weights", i32 1, i32 0}
; CHECK: !19 = !{!"branch_weights", i32 0, i32 1000}