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llvm/llvm/test/Transforms/ConstraintElimination/mul-nsw.ll 

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

declare void @use(i1)
declare void @llvm.assume(i1)

define void @slt_mul_nsw_3_known_positive_1(i8 %start, i8 %high) {
; CHECK-LABEL: @slt_mul_nsw_3_known_positive_1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], 3
; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
; CHECK-NEXT:    [[C_2:%.*]] = icmp sgt i8 [[START]], 0
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[START_1:%.*]] = mul nsw i8 [[START]], 1
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[START_2:%.*]] = mul nsw i8 [[START]], 2
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[START_3:%.*]] = mul nsw i8 [[START]], 3
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[START_4:%.*]] = mul nsw i8 [[START]], 4
; CHECK-NEXT:    [[C_3:%.*]] = icmp slt i8 [[START_4]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_3]])
; CHECK-NEXT:    ret void
; CHECK:       else:
; CHECK-NEXT:    ret void
;
entry:
  %mul.3  = mul nsw i8 %start, 3
  %c.1 = icmp slt i8 %mul.3, %high
  %c.2 = icmp sgt i8 %start, 0
  %and = and i1 %c.1, %c.2
  br i1 %and, label %then, label %else

then:
  %t.0 = icmp slt i8 %start, %high
  call void @use(i1 %t.0)
  %start.1 = mul nsw i8 %start, 1
  %t.1 = icmp slt i8 %start.1, %high
  call void @use(i1 %t.1)
  %start.2 = mul nsw i8 %start, 2
  %t.2 = icmp slt i8 %start.2, %high
  call void @use(i1 %t.2)
  %start.3 = mul nsw i8 %start, 3
  %t.3 = icmp slt i8 %start.3, %high
  call void @use(i1 %t.3)
  %start.4 = mul nsw i8 %start, 4
  %c.3 = icmp slt i8 %start.4, %high
  call void @use(i1 %c.3)
  ret void

else:
  ret void
}

define void @slt_mul_nsw_3_known_positive_2(i8 %start, i8 %high) {
; CHECK-LABEL: @slt_mul_nsw_3_known_positive_2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], 3
; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
; CHECK-NEXT:    [[C_2:%.*]] = icmp sgt i8 [[START]], 0
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    ret void
; CHECK:       else:
; CHECK-NEXT:    [[C_4:%.*]] = icmp slt i8 [[START]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_4]])
; CHECK-NEXT:    [[ELSE_START_1:%.*]] = mul nsw i8 [[START]], 1
; CHECK-NEXT:    [[C_5:%.*]] = icmp slt i8 [[ELSE_START_1]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_5]])
; CHECK-NEXT:    [[ELSE_START_2:%.*]] = mul nsw i8 [[START]], 2
; CHECK-NEXT:    [[C_6:%.*]] = icmp slt i8 [[ELSE_START_2]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_6]])
; CHECK-NEXT:    [[ELSE_START_3:%.*]] = mul nsw i8 [[START]], 3
; CHECK-NEXT:    [[C_7:%.*]] = icmp slt i8 [[ELSE_START_3]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_7]])
; CHECK-NEXT:    [[ELSE_START_4:%.*]] = mul nsw i8 [[START]], 4
; CHECK-NEXT:    [[C_8:%.*]] = icmp slt i8 [[ELSE_START_4]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_8]])
; CHECK-NEXT:    ret void
;
entry:
  %mul.3  = mul nsw i8 %start, 3
  %c.1 = icmp slt i8 %mul.3, %high
  %c.2 = icmp sgt i8 %start, 0
  %and = and i1 %c.1, %c.2
  br i1 %and, label %then, label %else

then:
  ret void

else:
  %c.4 = icmp slt i8 %start, %high
  call void @use(i1 %c.4)
  %else.start.1 = mul nsw i8 %start, 1
  %c.5 = icmp slt i8 %else.start.1, %high
  call void @use(i1 %c.5)
  %else.start.2 = mul nsw i8 %start, 2
  %c.6 = icmp slt i8 %else.start.2, %high
  call void @use(i1 %c.6)
  %else.start.3 = mul nsw i8 %start, 3
  %c.7 = icmp slt i8 %else.start.3, %high
  call void @use(i1 %c.7)
  %else.start.4 = mul nsw i8 %start, 4
  %c.8 = icmp slt i8 %else.start.4, %high
  call void @use(i1 %c.8)
  ret void
}

define void @slt_mul_no_nsw_3_known_positive_1(i8 %start, i8 %high) {
; CHECK-LABEL: @slt_mul_no_nsw_3_known_positive_1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[MUL_3:%.*]] = mul i8 [[START:%.*]], 3
; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
; CHECK-NEXT:    [[C_2:%.*]] = icmp sgt i8 [[START]], 0
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    [[C_3:%.*]] = icmp slt i8 [[START]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_3]])
; CHECK-NEXT:    [[START_1:%.*]] = mul nsw i8 [[START]], 1
; CHECK-NEXT:    [[C_4:%.*]] = icmp slt i8 [[START_1]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_4]])
; CHECK-NEXT:    [[START_2:%.*]] = mul nsw i8 [[START]], 2
; CHECK-NEXT:    [[C_5:%.*]] = icmp slt i8 [[START_2]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_5]])
; CHECK-NEXT:    [[START_3:%.*]] = mul nsw i8 [[START]], 3
; CHECK-NEXT:    [[C_6:%.*]] = icmp slt i8 [[START_3]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_6]])
; CHECK-NEXT:    [[START_4:%.*]] = mul nsw i8 [[START]], 4
; CHECK-NEXT:    [[C_7:%.*]] = icmp slt i8 [[START_4]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_7]])
; CHECK-NEXT:    ret void
; CHECK:       else:
; CHECK-NEXT:    ret void
;
entry:
  %mul.3  = mul i8 %start, 3
  %c.1 = icmp slt i8 %mul.3, %high
  %c.2 = icmp sgt i8 %start, 0
  %and = and i1 %c.1, %c.2
  br i1 %and, label %then, label %else

then:
  %c.3 = icmp slt i8 %start, %high
  call void @use(i1 %c.3)
  %start.1 = mul nsw i8 %start, 1
  %c.4 = icmp slt i8 %start.1, %high
  call void @use(i1 %c.4)
  %start.2 = mul nsw i8 %start, 2
  %c.5 = icmp slt i8 %start.2, %high
  call void @use(i1 %c.5)
  %start.3 = mul nsw i8 %start, 3
  %c.6 = icmp slt i8 %start.3, %high
  call void @use(i1 %c.6)
  %start.4 = mul nsw i8 %start, 4
  %c.7 = icmp slt i8 %start.4, %high
  call void @use(i1 %c.7)
  ret void

else:
  ret void
}

define void @slt_mul_no_nsw_3_known_positive_2(i8 %start, i8 %high) {
; CHECK-LABEL: @slt_mul_no_nsw_3_known_positive_2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[MUL_3:%.*]] = mul i8 [[START:%.*]], 3
; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
; CHECK-NEXT:    [[C_2:%.*]] = icmp sgt i8 [[START]], 0
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    ret void
; CHECK:       else:
; CHECK-NEXT:    [[C_8:%.*]] = icmp slt i8 [[START]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_8]])
; CHECK-NEXT:    [[ELSE_START_1:%.*]] = mul nsw i8 [[START]], 1
; CHECK-NEXT:    [[C_9:%.*]] = icmp slt i8 [[ELSE_START_1]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_9]])
; CHECK-NEXT:    [[ELSE_START_2:%.*]] = mul nsw i8 [[START]], 2
; CHECK-NEXT:    [[C_10:%.*]] = icmp slt i8 [[ELSE_START_2]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_10]])
; CHECK-NEXT:    [[ELSE_START_3:%.*]] = mul nsw i8 [[START]], 3
; CHECK-NEXT:    [[C_11:%.*]] = icmp slt i8 [[ELSE_START_3]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_11]])
; CHECK-NEXT:    [[ELSE_START_4:%.*]] = mul nsw i8 [[START]], 4
; CHECK-NEXT:    [[C_12:%.*]] = icmp slt i8 [[ELSE_START_4]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_12]])
; CHECK-NEXT:    ret void
;
entry:
  %mul.3  = mul i8 %start, 3
  %c.1 = icmp slt i8 %mul.3, %high
  %c.2 = icmp sgt i8 %start, 0
  %and = and i1 %c.1, %c.2
  br i1 %and, label %then, label %else

then:
  ret void

else:
  %c.8 = icmp slt i8 %start, %high
  call void @use(i1 %c.8)
  %else.start.1 = mul nsw i8 %start, 1
  %c.9 = icmp slt i8 %else.start.1, %high
  call void @use(i1 %c.9)
  %else.start.2 = mul nsw i8 %start, 2
  %c.10 = icmp slt i8 %else.start.2, %high
  call void @use(i1 %c.10)
  %else.start.3 = mul nsw i8 %start, 3
  %c.11 = icmp slt i8 %else.start.3, %high
  call void @use(i1 %c.11)
  %else.start.4 = mul nsw i8 %start, 4
  %c.12 = icmp slt i8 %else.start.4, %high
  call void @use(i1 %c.12)
  ret void
}

define void @slt_mul_nsw_3_not_known_positive_1(i8 %start, i8 %high) {
; CHECK-LABEL: @slt_mul_nsw_3_not_known_positive_1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[MUL_3:%.*]] = mul i8 [[START:%.*]], 3
; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
; CHECK-NEXT:    br i1 [[C_1]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    [[C_3:%.*]] = icmp slt i8 [[START]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_3]])
; CHECK-NEXT:    [[START_1:%.*]] = mul nsw i8 [[START]], 1
; CHECK-NEXT:    [[C_4:%.*]] = icmp slt i8 [[START_1]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_4]])
; CHECK-NEXT:    [[START_2:%.*]] = mul nsw i8 [[START]], 2
; CHECK-NEXT:    [[C_5:%.*]] = icmp slt i8 [[START_2]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_5]])
; CHECK-NEXT:    [[START_3:%.*]] = mul nsw i8 [[START]], 3
; CHECK-NEXT:    [[C_6:%.*]] = icmp slt i8 [[START_3]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_6]])
; CHECK-NEXT:    [[START_4:%.*]] = mul nsw i8 [[START]], 4
; CHECK-NEXT:    [[C_7:%.*]] = icmp slt i8 [[START_4]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_7]])
; CHECK-NEXT:    ret void
; CHECK:       else:
; CHECK-NEXT:    ret void
;
entry:
  %mul.3  = mul i8 %start, 3
  %c.1 = icmp slt i8 %mul.3, %high
  br i1 %c.1, label %then, label %else

then:
  %c.3 = icmp slt i8 %start, %high
  call void @use(i1 %c.3)
  %start.1 = mul nsw i8 %start, 1
  %c.4 = icmp slt i8 %start.1, %high
  call void @use(i1 %c.4)
  %start.2 = mul nsw i8 %start, 2
  %c.5 = icmp slt i8 %start.2, %high
  call void @use(i1 %c.5)
  %start.3 = mul nsw i8 %start, 3
  %c.6 = icmp slt i8 %start.3, %high
  call void @use(i1 %c.6)
  %start.4 = mul nsw i8 %start, 4
  %c.7 = icmp slt i8 %start.4, %high
  call void @use(i1 %c.7)
  ret void

else:
  ret void
}

define void @slt_mul_nsw_3_not_known_positive_2(i8 %start, i8 %high) {
; CHECK-LABEL: @slt_mul_nsw_3_not_known_positive_2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[MUL_3:%.*]] = mul i8 [[START:%.*]], 3
; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
; CHECK-NEXT:    br i1 [[C_1]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    ret void
; CHECK:       else:
; CHECK-NEXT:    [[C_8:%.*]] = icmp slt i8 [[START]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_8]])
; CHECK-NEXT:    [[ELSE_START_1:%.*]] = mul nsw i8 [[START]], 1
; CHECK-NEXT:    [[C_9:%.*]] = icmp slt i8 [[ELSE_START_1]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_9]])
; CHECK-NEXT:    [[ELSE_START_2:%.*]] = mul nsw i8 [[START]], 2
; CHECK-NEXT:    [[C_10:%.*]] = icmp slt i8 [[ELSE_START_2]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_10]])
; CHECK-NEXT:    [[ELSE_START_3:%.*]] = mul nsw i8 [[START]], 3
; CHECK-NEXT:    [[C_11:%.*]] = icmp slt i8 [[ELSE_START_3]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_11]])
; CHECK-NEXT:    [[ELSE_START_4:%.*]] = mul nsw i8 [[START]], 4
; CHECK-NEXT:    [[C_12:%.*]] = icmp slt i8 [[ELSE_START_4]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_12]])
; CHECK-NEXT:    ret void
;
entry:
  %mul.3  = mul i8 %start, 3
  %c.1 = icmp slt i8 %mul.3, %high
  br i1 %c.1, label %then, label %else

then:
  ret void

else:
  %c.8 = icmp slt i8 %start, %high
  call void @use(i1 %c.8)
  %else.start.1 = mul nsw i8 %start, 1
  %c.9 = icmp slt i8 %else.start.1, %high
  call void @use(i1 %c.9)
  %else.start.2 = mul nsw i8 %start, 2
  %c.10 = icmp slt i8 %else.start.2, %high
  call void @use(i1 %c.10)
  %else.start.3 = mul nsw i8 %start, 3
  %c.11 = icmp slt i8 %else.start.3, %high
  call void @use(i1 %c.11)
  %else.start.4 = mul nsw i8 %start, 4
  %c.12 = icmp slt i8 %else.start.4, %high
  call void @use(i1 %c.12)
  ret void
}

define void @slt_mul_nsw_neg_3_known_negative_1(i8 %start, i8 %high) {
; CHECK-LABEL: @slt_mul_nsw_neg_3_known_negative_1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], -3
; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
; CHECK-NEXT:    [[C_2:%.*]] = icmp slt i8 [[START]], 0
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[START_1:%.*]] = mul nsw i8 [[START]], -1
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[START_2:%.*]] = mul nsw i8 [[START]], -2
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[START_3:%.*]] = mul nsw i8 [[START]], -3
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[START_4:%.*]] = mul nsw i8 [[START]], -4
; CHECK-NEXT:    [[C_3:%.*]] = icmp slt i8 [[START_4]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_3]])
; CHECK-NEXT:    ret void
; CHECK:       else:
; CHECK-NEXT:    ret void
;
entry:
  %mul.3  = mul nsw i8 %start, -3
  %c.1 = icmp slt i8 %mul.3, %high
  %c.2 = icmp slt i8 %start, 0
  %and = and i1 %c.1, %c.2
  br i1 %and, label %then, label %else

then:
  %t.0 = icmp slt i8 %start, %high
  call void @use(i1 %t.0)
  %start.1 = mul nsw i8 %start, -1
  %t.1 = icmp slt i8 %start.1, %high
  call void @use(i1 %t.1)
  %start.2 = mul nsw i8 %start, -2
  %t.2 = icmp slt i8 %start.2, %high
  call void @use(i1 %t.2)
  %start.3 = mul nsw i8 %start, -3
  %t.3 = icmp slt i8 %start.3, %high
  call void @use(i1 %t.3)
  %start.4 = mul nsw i8 %start, -4
  %c.3 = icmp slt i8 %start.4, %high
  call void @use(i1 %c.3)
  ret void

else:
  ret void
}

define void @slt_mul_nsw_neg_3_known_negative_2(i8 %start, i8 %high) {
; CHECK-LABEL: @slt_mul_nsw_neg_3_known_negative_2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], -3
; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
; CHECK-NEXT:    [[C_2:%.*]] = icmp slt i8 [[START]], 0
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    ret void
; CHECK:       else:
; CHECK-NEXT:    [[C_4:%.*]] = icmp slt i8 [[START]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_4]])
; CHECK-NEXT:    [[ELSE_START_1:%.*]] = mul nsw i8 [[START]], -1
; CHECK-NEXT:    [[C_5:%.*]] = icmp slt i8 [[ELSE_START_1]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_5]])
; CHECK-NEXT:    [[ELSE_START_2:%.*]] = mul nsw i8 [[START]], -2
; CHECK-NEXT:    [[C_6:%.*]] = icmp slt i8 [[ELSE_START_2]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_6]])
; CHECK-NEXT:    [[ELSE_START_3:%.*]] = mul nsw i8 [[START]], -3
; CHECK-NEXT:    [[C_7:%.*]] = icmp slt i8 [[ELSE_START_3]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_7]])
; CHECK-NEXT:    [[ELSE_START_4:%.*]] = mul nsw i8 [[START]], -4
; CHECK-NEXT:    [[C_8:%.*]] = icmp slt i8 [[ELSE_START_4]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_8]])
; CHECK-NEXT:    ret void
;
entry:
  %mul.3  = mul nsw i8 %start, -3
  %c.1 = icmp slt i8 %mul.3, %high
  %c.2 = icmp slt i8 %start, 0
  %and = and i1 %c.1, %c.2
  br i1 %and, label %then, label %else

then:
  ret void

else:
  %c.4 = icmp slt i8 %start, %high
  call void @use(i1 %c.4)
  %else.start.1 = mul nsw i8 %start, -1
  %c.5 = icmp slt i8 %else.start.1, %high
  call void @use(i1 %c.5)
  %else.start.2 = mul nsw i8 %start, -2
  %c.6 = icmp slt i8 %else.start.2, %high
  call void @use(i1 %c.6)
  %else.start.3 = mul nsw i8 %start, -3
  %c.7 = icmp slt i8 %else.start.3, %high
  call void @use(i1 %c.7)
  %else.start.4 = mul nsw i8 %start, -4
  %c.8 = icmp slt i8 %else.start.4, %high
  call void @use(i1 %c.8)
  ret void
}

define void @slt_mul_nsw_3_known_negative_1(i8 %start, i8 %high) {
; CHECK-LABEL: @slt_mul_nsw_3_known_negative_1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], 3
; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
; CHECK-NEXT:    [[C_2:%.*]] = icmp slt i8 [[START]], 0
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    [[C_3:%.*]] = icmp slt i8 [[START]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_3]])
; CHECK-NEXT:    [[START_1:%.*]] = mul nsw i8 [[START]], 1
; CHECK-NEXT:    [[C_4:%.*]] = icmp slt i8 [[START_1]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_4]])
; CHECK-NEXT:    [[START_2:%.*]] = mul nsw i8 [[START]], 2
; CHECK-NEXT:    [[C_5:%.*]] = icmp slt i8 [[START_2]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_5]])
; CHECK-NEXT:    [[START_3:%.*]] = mul nsw i8 [[START]], 3
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[START_4:%.*]] = mul nsw i8 [[START]], 4
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    ret void
; CHECK:       else:
; CHECK-NEXT:    ret void
;
entry:
  %mul.3  = mul nsw i8 %start, 3
  %c.1 = icmp slt i8 %mul.3, %high
  %c.2 = icmp slt i8 %start, 0
  %and = and i1 %c.1, %c.2
  br i1 %and, label %then, label %else

then:
  %c.3 = icmp slt i8 %start, %high
  call void @use(i1 %c.3)
  %start.1 = mul nsw i8 %start, 1
  %c.4 = icmp slt i8 %start.1, %high
  call void @use(i1 %c.4)
  %start.2 = mul nsw i8 %start, 2
  %c.5 = icmp slt i8 %start.2, %high
  call void @use(i1 %c.5)
  %start.3 = mul nsw i8 %start, 3
  %t.0 = icmp slt i8 %start.3, %high
  call void @use(i1 %t.0)
  %start.4 = mul nsw i8 %start, 4
  %t.1 = icmp slt i8 %start.4, %high
  call void @use(i1 %t.1)
  ret void

else:
  ret void
}

define void @slt_mul_nsw_3_known_negative_2(i8 %start, i8 %high) {
; CHECK-LABEL: @slt_mul_nsw_3_known_negative_2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], 3
; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
; CHECK-NEXT:    [[C_2:%.*]] = icmp slt i8 [[START]], 0
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    ret void
; CHECK:       else:
; CHECK-NEXT:    [[C_6:%.*]] = icmp slt i8 [[START]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_6]])
; CHECK-NEXT:    [[ELSE_START_1:%.*]] = mul nsw i8 [[START]], 1
; CHECK-NEXT:    [[C_7:%.*]] = icmp slt i8 [[ELSE_START_1]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_7]])
; CHECK-NEXT:    [[ELSE_START_2:%.*]] = mul nsw i8 [[START]], 2
; CHECK-NEXT:    [[C_8:%.*]] = icmp slt i8 [[ELSE_START_2]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_8]])
; CHECK-NEXT:    [[ELSE_START_3:%.*]] = mul nsw i8 [[START]], 3
; CHECK-NEXT:    [[C_9:%.*]] = icmp slt i8 [[ELSE_START_3]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_9]])
; CHECK-NEXT:    [[ELSE_START_4:%.*]] = mul nsw i8 [[START]], 4
; CHECK-NEXT:    [[C_10:%.*]] = icmp slt i8 [[ELSE_START_4]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_10]])
; CHECK-NEXT:    ret void
;
entry:
  %mul.3  = mul nsw i8 %start, 3
  %c.1 = icmp slt i8 %mul.3, %high
  %c.2 = icmp slt i8 %start, 0
  %and = and i1 %c.1, %c.2
  br i1 %and, label %then, label %else

then:
  ret void

else:
  %c.6 = icmp slt i8 %start, %high
  call void @use(i1 %c.6)
  %else.start.1 = mul nsw i8 %start, 1
  %c.7 = icmp slt i8 %else.start.1, %high
  call void @use(i1 %c.7)
  %else.start.2 = mul nsw i8 %start, 2
  %c.8 = icmp slt i8 %else.start.2, %high
  call void @use(i1 %c.8)
  %else.start.3 = mul nsw i8 %start, 3
  %c.9 = icmp slt i8 %else.start.3, %high
  call void @use(i1 %c.9)
  %else.start.4 = mul nsw i8 %start, 4
  %c.10 = icmp slt i8 %else.start.4, %high
  call void @use(i1 %c.10)
  ret void
}

define void @slt_mul_nsw_neg_3_known_positive_1(i8 %start, i8 %high) {
; CHECK-LABEL: @slt_mul_nsw_neg_3_known_positive_1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], -3
; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
; CHECK-NEXT:    [[C_2:%.*]] = icmp sgt i8 [[START]], 0
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    [[C_3:%.*]] = icmp slt i8 [[START]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_3]])
; CHECK-NEXT:    [[START_1:%.*]] = mul nsw i8 [[START]], -1
; CHECK-NEXT:    [[C_4:%.*]] = icmp slt i8 [[START_1]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_4]])
; CHECK-NEXT:    [[START_2:%.*]] = mul nsw i8 [[START]], -2
; CHECK-NEXT:    [[C_5:%.*]] = icmp slt i8 [[START_2]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_5]])
; CHECK-NEXT:    [[START_3:%.*]] = mul nsw i8 [[START]], -3
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[START_4:%.*]] = mul nsw i8 [[START]], -4
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    ret void
; CHECK:       else:
; CHECK-NEXT:    ret void
;
entry:
  %mul.3  = mul nsw i8 %start, -3
  %c.1 = icmp slt i8 %mul.3, %high
  %c.2 = icmp sgt i8 %start, 0
  %and = and i1 %c.1, %c.2
  br i1 %and, label %then, label %else

then:
  %c.3 = icmp slt i8 %start, %high
  call void @use(i1 %c.3)
  %start.1 = mul nsw i8 %start, -1
  %c.4 = icmp slt i8 %start.1, %high
  call void @use(i1 %c.4)
  %start.2 = mul nsw i8 %start, -2
  %c.5 = icmp slt i8 %start.2, %high
  call void @use(i1 %c.5)
  %start.3 = mul nsw i8 %start, -3
  %t.0 = icmp slt i8 %start.3, %high
  call void @use(i1 %t.0)
  %start.4 = mul nsw i8 %start, -4
  %t.1 = icmp slt i8 %start.4, %high
  call void @use(i1 %t.1)
  ret void

else:
  ret void
}

define void @slt_mul_nsw_neg_3_known_positive_2(i8 %start, i8 %high) {
; CHECK-LABEL: @slt_mul_nsw_neg_3_known_positive_2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], -3
; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
; CHECK-NEXT:    [[C_2:%.*]] = icmp sgt i8 [[START]], 0
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    ret void
; CHECK:       else:
; CHECK-NEXT:    [[C_6:%.*]] = icmp slt i8 [[START]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_6]])
; CHECK-NEXT:    [[ELSE_START_1:%.*]] = mul nsw i8 [[START]], -1
; CHECK-NEXT:    [[C_7:%.*]] = icmp slt i8 [[ELSE_START_1]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_7]])
; CHECK-NEXT:    [[ELSE_START_2:%.*]] = mul nsw i8 [[START]], -2
; CHECK-NEXT:    [[C_8:%.*]] = icmp slt i8 [[ELSE_START_2]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_8]])
; CHECK-NEXT:    [[ELSE_START_3:%.*]] = mul nsw i8 [[START]], -3
; CHECK-NEXT:    [[C_9:%.*]] = icmp slt i8 [[ELSE_START_3]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_9]])
; CHECK-NEXT:    [[ELSE_START_4:%.*]] = mul nsw i8 [[START]], -4
; CHECK-NEXT:    [[C_10:%.*]] = icmp slt i8 [[ELSE_START_4]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_10]])
; CHECK-NEXT:    ret void
;
entry:
  %mul.3  = mul nsw i8 %start, -3
  %c.1 = icmp slt i8 %mul.3, %high
  %c.2 = icmp sgt i8 %start, 0
  %and = and i1 %c.1, %c.2
  br i1 %and, label %then, label %else

then:
  ret void

else:
  %c.6 = icmp slt i8 %start, %high
  call void @use(i1 %c.6)
  %else.start.1 = mul nsw i8 %start, -1
  %c.7 = icmp slt i8 %else.start.1, %high
  call void @use(i1 %c.7)
  %else.start.2 = mul nsw i8 %start, -2
  %c.8 = icmp slt i8 %else.start.2, %high
  call void @use(i1 %c.8)
  %else.start.3 = mul nsw i8 %start, -3
  %c.9 = icmp slt i8 %else.start.3, %high
  call void @use(i1 %c.9)
  %else.start.4 = mul nsw i8 %start, -4
  %c.10 = icmp slt i8 %else.start.4, %high
  call void @use(i1 %c.10)
  ret void
}

define void @slt_mul_nsw_3_known_nonnegative_1(i8 %start, i8 %high) {
; CHECK-LABEL: @slt_mul_nsw_3_known_nonnegative_1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], 3
; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
; CHECK-NEXT:    [[C_2:%.*]] = icmp sge i8 [[START]], 0
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[START_1:%.*]] = mul nsw i8 [[START]], 1
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[START_2:%.*]] = mul nsw i8 [[START]], 2
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[START_3:%.*]] = mul nsw i8 [[START]], 3
; CHECK-NEXT:    call void @use(i1 true)
; CHECK-NEXT:    [[START_4:%.*]] = mul nsw i8 [[START]], 4
; CHECK-NEXT:    [[C_3:%.*]] = icmp slt i8 [[START_4]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_3]])
; CHECK-NEXT:    ret void
; CHECK:       else:
; CHECK-NEXT:    ret void
;
entry:
  %mul.3  = mul nsw i8 %start, 3
  %c.1 = icmp slt i8 %mul.3, %high
  %c.2 = icmp sge i8 %start, 0
  %and = and i1 %c.1, %c.2
  br i1 %and, label %then, label %else

then:
  %t.0 = icmp slt i8 %start, %high
  call void @use(i1 %t.0)
  %start.1 = mul nsw i8 %start, 1
  %t.1 = icmp slt i8 %start.1, %high
  call void @use(i1 %t.1)
  %start.2 = mul nsw i8 %start, 2
  %t.2 = icmp slt i8 %start.2, %high
  call void @use(i1 %t.2)
  %start.3 = mul nsw i8 %start, 3
  %t.3 = icmp slt i8 %start.3, %high
  call void @use(i1 %t.3)
  %start.4 = mul nsw i8 %start, 4
  %c.3 = icmp slt i8 %start.4, %high
  call void @use(i1 %c.3)
  ret void

else:
  ret void
}

define void @slt_mul_nsw_3_known_nonnegative_2(i8 %start, i8 %high) {
; CHECK-LABEL: @slt_mul_nsw_3_known_nonnegative_2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], 3
; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
; CHECK-NEXT:    [[C_2:%.*]] = icmp sge i8 [[START]], 0
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    ret void
; CHECK:       else:
; CHECK-NEXT:    [[C_4:%.*]] = icmp slt i8 [[START]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_4]])
; CHECK-NEXT:    [[ELSE_START_1:%.*]] = mul nsw i8 [[START]], 1
; CHECK-NEXT:    [[C_5:%.*]] = icmp slt i8 [[ELSE_START_1]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_5]])
; CHECK-NEXT:    [[ELSE_START_2:%.*]] = mul nsw i8 [[START]], 2
; CHECK-NEXT:    [[C_6:%.*]] = icmp slt i8 [[ELSE_START_2]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_6]])
; CHECK-NEXT:    [[ELSE_START_3:%.*]] = mul nsw i8 [[START]], 3
; CHECK-NEXT:    [[C_7:%.*]] = icmp slt i8 [[ELSE_START_3]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_7]])
; CHECK-NEXT:    [[ELSE_START_4:%.*]] = mul nsw i8 [[START]], 4
; CHECK-NEXT:    [[C_8:%.*]] = icmp slt i8 [[ELSE_START_4]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_8]])
; CHECK-NEXT:    ret void
;
entry:
  %mul.3  = mul nsw i8 %start, 3
  %c.1 = icmp slt i8 %mul.3, %high
  %c.2 = icmp sge i8 %start, 0
  %and = and i1 %c.1, %c.2
  br i1 %and, label %then, label %else

then:
  ret void

else:
  %c.4 = icmp slt i8 %start, %high
  call void @use(i1 %c.4)
  %else.start.1 = mul nsw i8 %start, 1
  %c.5 = icmp slt i8 %else.start.1, %high
  call void @use(i1 %c.5)
  %else.start.2 = mul nsw i8 %start, 2
  %c.6 = icmp slt i8 %else.start.2, %high
  call void @use(i1 %c.6)
  %else.start.3 = mul nsw i8 %start, 3
  %c.7 = icmp slt i8 %else.start.3, %high
  call void @use(i1 %c.7)
  %else.start.4 = mul nsw i8 %start, 4
  %c.8 = icmp slt i8 %else.start.4, %high
  call void @use(i1 %c.8)
  ret void
}

define void @slt_mul_nsw_both_var_non_negative_1(i8 %start, i8 %scale, i8 %high) {
; CHECK-LABEL: @slt_mul_nsw_both_var_non_negative_1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], [[SCALE:%.*]]
; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
; CHECK-NEXT:    [[C_2:%.*]] = icmp sgt i8 [[START]], 0
; CHECK-NEXT:    [[C3:%.*]] = icmp sgt i8 [[SCALE]], 0
; CHECK-NEXT:    call void @llvm.assume(i1 [[C3]])
; CHECK-NEXT:    [[C4:%.*]] = icmp sle i8 [[SCALE]], 3
; CHECK-NEXT:    call void @llvm.assume(i1 [[C3]])
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    [[T_0:%.*]] = icmp slt i8 [[START]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[T_0]])
; CHECK-NEXT:    [[START_1:%.*]] = mul nsw i8 [[START]], 1
; CHECK-NEXT:    [[T_1:%.*]] = icmp slt i8 [[START_1]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[T_1]])
; CHECK-NEXT:    [[START_2:%.*]] = mul nsw i8 [[START]], 2
; CHECK-NEXT:    [[T_2:%.*]] = icmp slt i8 [[START_2]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[T_2]])
; CHECK-NEXT:    [[START_3:%.*]] = mul nsw i8 [[START]], 3
; CHECK-NEXT:    [[T_3:%.*]] = icmp slt i8 [[START_3]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[T_3]])
; CHECK-NEXT:    [[START_4:%.*]] = mul nsw i8 [[START]], 4
; CHECK-NEXT:    [[C_3:%.*]] = icmp slt i8 [[START_4]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_3]])
; CHECK-NEXT:    ret void
; CHECK:       else:
; CHECK-NEXT:    [[C_4:%.*]] = icmp slt i8 [[START]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_4]])
; CHECK-NEXT:    [[ELSE_START_1:%.*]] = mul nsw i8 [[START]], 1
; CHECK-NEXT:    [[C_5:%.*]] = icmp slt i8 [[ELSE_START_1]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_5]])
; CHECK-NEXT:    [[ELSE_START_2:%.*]] = mul nsw i8 [[START]], 2
; CHECK-NEXT:    [[C_6:%.*]] = icmp slt i8 [[ELSE_START_2]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_6]])
; CHECK-NEXT:    [[ELSE_START_3:%.*]] = mul nsw i8 [[START]], 3
; CHECK-NEXT:    [[C_7:%.*]] = icmp slt i8 [[ELSE_START_3]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_7]])
; CHECK-NEXT:    [[ELSE_START_4:%.*]] = mul nsw i8 [[START]], 4
; CHECK-NEXT:    [[C_8:%.*]] = icmp slt i8 [[ELSE_START_4]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_8]])
; CHECK-NEXT:    ret void
;
entry:
  %mul.3  = mul nsw i8 %start, %scale
  %c.1 = icmp slt i8 %mul.3, %high
  %c.2 = icmp sgt i8 %start, 0
  %c3 = icmp sgt i8 %scale, 0
  call void @llvm.assume(i1 %c3)
  %c4 = icmp sle i8 %scale, 3
  call void @llvm.assume(i1 %c3)
  %and = and i1 %c.1, %c.2
  br i1 %and, label %then, label %else

then:
  %t.0 = icmp slt i8 %start, %high
  call void @use(i1 %t.0)
  %start.1 = mul nsw i8 %start, 1
  %t.1 = icmp slt i8 %start.1, %high
  call void @use(i1 %t.1)
  %start.2 = mul nsw i8 %start, 2
  %t.2 = icmp slt i8 %start.2, %high
  call void @use(i1 %t.2)
  %start.3 = mul nsw i8 %start, 3
  %t.3 = icmp slt i8 %start.3, %high
  call void @use(i1 %t.3)
  %start.4 = mul nsw i8 %start, 4
  %c.3 = icmp slt i8 %start.4, %high
  call void @use(i1 %c.3)
  ret void

else:
  %c.4 = icmp slt i8 %start, %high
  call void @use(i1 %c.4)
  %else.start.1 = mul nsw i8 %start, 1
  %c.5 = icmp slt i8 %else.start.1, %high
  call void @use(i1 %c.5)
  %else.start.2 = mul nsw i8 %start, 2
  %c.6 = icmp slt i8 %else.start.2, %high
  call void @use(i1 %c.6)
  %else.start.3 = mul nsw i8 %start, 3
  %c.7 = icmp slt i8 %else.start.3, %high
  call void @use(i1 %c.7)
  %else.start.4 = mul nsw i8 %start, 4
  %c.8 = icmp slt i8 %else.start.4, %high
  call void @use(i1 %c.8)
  ret void
}

define void @slt_mul_nsw_both_var_non_negative_2(i8 %start, i8 %scale, i8 %high) {
; CHECK-LABEL: @slt_mul_nsw_both_var_non_negative_2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], [[SCALE:%.*]]
; CHECK-NEXT:    [[C_1:%.*]] = icmp slt i8 [[MUL_3]], [[HIGH:%.*]]
; CHECK-NEXT:    [[C_2:%.*]] = icmp sgt i8 [[START]], 0
; CHECK-NEXT:    [[C3:%.*]] = icmp sgt i8 [[SCALE]], 0
; CHECK-NEXT:    call void @llvm.assume(i1 [[C3]])
; CHECK-NEXT:    [[C4:%.*]] = icmp sle i8 [[SCALE]], 3
; CHECK-NEXT:    call void @llvm.assume(i1 [[C3]])
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    ret void
; CHECK:       else:
; CHECK-NEXT:    [[C_4:%.*]] = icmp slt i8 [[START]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_4]])
; CHECK-NEXT:    [[ELSE_START_1:%.*]] = mul nsw i8 [[START]], 1
; CHECK-NEXT:    [[C_5:%.*]] = icmp slt i8 [[ELSE_START_1]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_5]])
; CHECK-NEXT:    [[ELSE_START_2:%.*]] = mul nsw i8 [[START]], 2
; CHECK-NEXT:    [[C_6:%.*]] = icmp slt i8 [[ELSE_START_2]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_6]])
; CHECK-NEXT:    [[ELSE_START_3:%.*]] = mul nsw i8 [[START]], 3
; CHECK-NEXT:    [[C_7:%.*]] = icmp slt i8 [[ELSE_START_3]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_7]])
; CHECK-NEXT:    [[ELSE_START_4:%.*]] = mul nsw i8 [[START]], 4
; CHECK-NEXT:    [[C_8:%.*]] = icmp slt i8 [[ELSE_START_4]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_8]])
; CHECK-NEXT:    ret void
;
entry:
  %mul.3  = mul nsw i8 %start, %scale
  %c.1 = icmp slt i8 %mul.3, %high
  %c.2 = icmp sgt i8 %start, 0
  %c3 = icmp sgt i8 %scale, 0
  call void @llvm.assume(i1 %c3)
  %c4 = icmp sle i8 %scale, 3
  call void @llvm.assume(i1 %c3)
  %and = and i1 %c.1, %c.2
  br i1 %and, label %then, label %else

then:
  ret void

else:
  %c.4 = icmp slt i8 %start, %high
  call void @use(i1 %c.4)
  %else.start.1 = mul nsw i8 %start, 1
  %c.5 = icmp slt i8 %else.start.1, %high
  call void @use(i1 %c.5)
  %else.start.2 = mul nsw i8 %start, 2
  %c.6 = icmp slt i8 %else.start.2, %high
  call void @use(i1 %c.6)
  %else.start.3 = mul nsw i8 %start, 3
  %c.7 = icmp slt i8 %else.start.3, %high
  call void @use(i1 %c.7)
  %else.start.4 = mul nsw i8 %start, 4
  %c.8 = icmp slt i8 %else.start.4, %high
  call void @use(i1 %c.8)
  ret void
}

define void @ult_mul_nsw_3_known_positive_1(i8 %start, i8 %high) {
; CHECK-LABEL: @ult_mul_nsw_3_known_positive_1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], 3
; CHECK-NEXT:    [[C_1:%.*]] = icmp ult i8 [[MUL_3]], [[HIGH:%.*]]
; CHECK-NEXT:    [[C_2:%.*]] = icmp ugt i8 [[START]], 0
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    [[T_0:%.*]] = icmp ult i8 [[START]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[T_0]])
; CHECK-NEXT:    [[START_1:%.*]] = mul nsw i8 [[START]], 1
; CHECK-NEXT:    [[T_1:%.*]] = icmp ult i8 [[START_1]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[T_1]])
; CHECK-NEXT:    [[START_2:%.*]] = mul nsw i8 [[START]], 2
; CHECK-NEXT:    [[T_2:%.*]] = icmp ult i8 [[START_2]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[T_2]])
; CHECK-NEXT:    [[START_3:%.*]] = mul nsw i8 [[START]], 3
; CHECK-NEXT:    [[T_3:%.*]] = icmp ult i8 [[START_3]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[T_3]])
; CHECK-NEXT:    [[START_4:%.*]] = mul nsw i8 [[START]], 4
; CHECK-NEXT:    [[C_3:%.*]] = icmp slt i8 [[START_4]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_3]])
; CHECK-NEXT:    ret void
; CHECK:       else:
; CHECK-NEXT:    ret void
;
entry:
  %mul.3  = mul nsw i8 %start, 3
  %c.1 = icmp ult i8 %mul.3, %high
  %c.2 = icmp ugt i8 %start, 0
  %and = and i1 %c.1, %c.2
  br i1 %and, label %then, label %else

then:
  %t.0 = icmp ult i8 %start, %high
  call void @use(i1 %t.0)
  %start.1 = mul nsw i8 %start, 1
  %t.1 = icmp ult i8 %start.1, %high
  call void @use(i1 %t.1)
  %start.2 = mul nsw i8 %start, 2
  %t.2 = icmp ult i8 %start.2, %high
  call void @use(i1 %t.2)
  %start.3 = mul nsw i8 %start, 3
  %t.3 = icmp ult i8 %start.3, %high
  call void @use(i1 %t.3)
  %start.4 = mul nsw i8 %start, 4
  %c.3 = icmp slt i8 %start.4, %high
  call void @use(i1 %c.3)
  ret void

else:
  ret void
}

define void @ult_mul_nsw_3_known_positive_2(i8 %start, i8 %high) {
; CHECK-LABEL: @ult_mul_nsw_3_known_positive_2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[MUL_3:%.*]] = mul nsw i8 [[START:%.*]], 3
; CHECK-NEXT:    [[C_1:%.*]] = icmp ult i8 [[MUL_3]], [[HIGH:%.*]]
; CHECK-NEXT:    [[C_2:%.*]] = icmp ugt i8 [[START]], 0
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], [[C_2]]
; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    ret void
; CHECK:       else:
; CHECK-NEXT:    [[C_4:%.*]] = icmp slt i8 [[START]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_4]])
; CHECK-NEXT:    [[ELSE_START_1:%.*]] = mul nsw i8 [[START]], 1
; CHECK-NEXT:    [[C_5:%.*]] = icmp slt i8 [[ELSE_START_1]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_5]])
; CHECK-NEXT:    [[ELSE_START_2:%.*]] = mul nsw i8 [[START]], 2
; CHECK-NEXT:    [[C_6:%.*]] = icmp slt i8 [[ELSE_START_2]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_6]])
; CHECK-NEXT:    [[ELSE_START_3:%.*]] = mul nsw i8 [[START]], 3
; CHECK-NEXT:    [[C_7:%.*]] = icmp slt i8 [[ELSE_START_3]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_7]])
; CHECK-NEXT:    [[ELSE_START_4:%.*]] = mul nsw i8 [[START]], 4
; CHECK-NEXT:    [[C_8:%.*]] = icmp slt i8 [[ELSE_START_4]], [[HIGH]]
; CHECK-NEXT:    call void @use(i1 [[C_8]])
; CHECK-NEXT:    ret void
;
entry:
  %mul.3  = mul nsw i8 %start, 3
  %c.1 = icmp ult i8 %mul.3, %high
  %c.2 = icmp ugt i8 %start, 0
  %and = and i1 %c.1, %c.2
  br i1 %and, label %then, label %else

then:
  ret void

else:
  %c.4 = icmp slt i8 %start, %high
  call void @use(i1 %c.4)
  %else.start.1 = mul nsw i8 %start, 1
  %c.5 = icmp slt i8 %else.start.1, %high
  call void @use(i1 %c.5)
  %else.start.2 = mul nsw i8 %start, 2
  %c.6 = icmp slt i8 %else.start.2, %high
  call void @use(i1 %c.6)
  %else.start.3 = mul nsw i8 %start, 3
  %c.7 = icmp slt i8 %else.start.3, %high
  call void @use(i1 %c.7)
  %else.start.4 = mul nsw i8 %start, 4
  %c.8 = icmp slt i8 %else.start.4, %high
  call void @use(i1 %c.8)
  ret void
}