text: ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
  ; RUN: opt %s -instcombine -S | FileCheck %s
  
  ; Fold
  ;   ((%x * %y) u/ %x) != %y
  ; to
  ;   @llvm.umul.with.overflow(%x, %y) + extractvalue
  
  define i1 @t0_basic(i8 %x, i8 %y) {
  ; CHECK-LABEL: @t0_basic(
  ; CHECK-NEXT:    [[UMUL:%.*]] = call { i8, i1 } @llvm.umul.with.overflow.i8(i8 [[X:%.*]], i8 [[Y:%.*]])
  ; CHECK-NEXT:    [[UMUL_OV:%.*]] = extractvalue { i8, i1 } [[UMUL]], 1
  ; CHECK-NEXT:    ret i1 [[UMUL_OV]]
  ;
    %t0 = mul i8 %x, %y
    %t1 = udiv i8 %t0, %x
    %r = icmp ne i8 %t1, %y
    ret i1 %r
  }
  
  define <2 x i1> @t1_vec(<2 x i8> %x, <2 x i8> %y) {
  ; CHECK-LABEL: @t1_vec(
  ; CHECK-NEXT:    [[UMUL:%.*]] = call { <2 x i8>, <2 x i1> } @llvm.umul.with.overflow.v2i8(<2 x i8> [[X:%.*]], <2 x i8> [[Y:%.*]])
  ; CHECK-NEXT:    [[UMUL_OV:%.*]] = extractvalue { <2 x i8>, <2 x i1> } [[UMUL]], 1
  ; CHECK-NEXT:    ret <2 x i1> [[UMUL_OV]]
  ;
    %t0 = mul <2 x i8> %x, %y
    %t1 = udiv <2 x i8> %t0, %x
    %r = icmp ne <2 x i8> %t1, %y
    ret <2 x i1> %r
  }
  
  declare i8 @gen8()
  
  define i1 @t2_commutative(i8 %x) {
  ; CHECK-LABEL: @t2_commutative(
  ; CHECK-NEXT:    [[Y:%.*]] = call i8 @gen8()
  ; CHECK-NEXT:    [[UMUL:%.*]] = call { i8, i1 } @llvm.umul.with.overflow.i8(i8 [[X:%.*]], i8 [[Y]])
  ; CHECK-NEXT:    [[UMUL_OV:%.*]] = extractvalue { i8, i1 } [[UMUL]], 1
  ; CHECK-NEXT:    ret i1 [[UMUL_OV]]
  ;
    %y = call i8 @gen8()
    %t0 = mul i8 %y, %x ; swapped
    %t1 = udiv i8 %t0, %x
    %r = icmp ne i8 %t1, %y
    ret i1 %r
  }
  
  define i1 @t3_commutative(i8 %x) {
  ; CHECK-LABEL: @t3_commutative(
  ; CHECK-NEXT:    [[Y:%.*]] = call i8 @gen8()
  ; CHECK-NEXT:    [[UMUL:%.*]] = call { i8, i1 } @llvm.umul.with.overflow.i8(i8 [[X:%.*]], i8 [[Y]])
  ; CHECK-NEXT:    [[UMUL_OV:%.*]] = extractvalue { i8, i1 } [[UMUL]], 1
  ; CHECK-NEXT:    ret i1 [[UMUL_OV]]
  ;
    %y = call i8 @gen8()
    %t0 = mul i8 %y, %x ; swapped
    %t1 = udiv i8 %t0, %x
    %r = icmp ne i8 %t1, %y
    ret i1 %r
  }
  
  define i1 @t4_commutative(i8 %x) {
  ; CHECK-LABEL: @t4_commutative(
  ; CHECK-NEXT:    [[Y:%.*]] = call i8 @gen8()
  ; CHECK-NEXT:    [[UMUL:%.*]] = call { i8, i1 } @llvm.umul.with.overflow.i8(i8 [[X:%.*]], i8 [[Y]])
  ; CHECK-NEXT:    [[UMUL_OV:%.*]] = extractvalue { i8, i1 } [[UMUL]], 1
  ; CHECK-NEXT:    ret i1 [[UMUL_OV]]
  ;
    %y = call i8 @gen8()
    %t0 = mul i8 %y, %x ; swapped
    %t1 = udiv i8 %t0, %x
    %r = icmp ne i8 %y, %t1 ; swapped
    ret i1 %r
  }
  
  ; Extra-use tests
  
  declare void @use8(i8)
  
  define i1 @t5_extrause0(i8 %x, i8 %y) {
  ; CHECK-LABEL: @t5_extrause0(
  ; CHECK-NEXT:    [[UMUL:%.*]] = call { i8, i1 } @llvm.umul.with.overflow.i8(i8 [[X:%.*]], i8 [[Y:%.*]])
  ; CHECK-NEXT:    [[UMUL_VAL:%.*]] = extractvalue { i8, i1 } [[UMUL]], 0
  ; CHECK-NEXT:    [[UMUL_OV:%.*]] = extractvalue { i8, i1 } [[UMUL]], 1
  ; CHECK-NEXT:    call void @use8(i8 [[UMUL_VAL]])
  ; CHECK-NEXT:    ret i1 [[UMUL_OV]]
  ;
    %t0 = mul i8 %x, %y
    call void @use8(i8 %t0)
    %t1 = udiv i8 %t0, %x
    %r = icmp ne i8 %t1, %y
    ret i1 %r
  }
  
  define i1 @t6_extrause1(i8 %x, i8 %y) {
  ; CHECK-LABEL: @t6_extrause1(
  ; CHECK-NEXT:    [[T0:%.*]] = mul i8 [[X:%.*]], [[Y:%.*]]
  ; CHECK-NEXT:    [[T1:%.*]] = udiv i8 [[T0]], [[X]]
  ; CHECK-NEXT:    call void @use8(i8 [[T1]])
  ; CHECK-NEXT:    [[R:%.*]] = icmp ne i8 [[T1]], [[Y]]
  ; CHECK-NEXT:    ret i1 [[R]]
  ;
    %t0 = mul i8 %x, %y
    %t1 = udiv i8 %t0, %x
    call void @use8(i8 %t1)
    %r = icmp ne i8 %t1, %y
    ret i1 %r
  }
  
  define i1 @t7_extrause2(i8 %x, i8 %y) {
  ; CHECK-LABEL: @t7_extrause2(
  ; CHECK-NEXT:    [[T0:%.*]] = mul i8 [[X:%.*]], [[Y:%.*]]
  ; CHECK-NEXT:    call void @use8(i8 [[T0]])
  ; CHECK-NEXT:    [[T1:%.*]] = udiv i8 [[T0]], [[X]]
  ; CHECK-NEXT:    call void @use8(i8 [[T1]])
  ; CHECK-NEXT:    [[R:%.*]] = icmp ne i8 [[T1]], [[Y]]
  ; CHECK-NEXT:    ret i1 [[R]]
  ;
    %t0 = mul i8 %x, %y
    call void @use8(i8 %t0)
    %t1 = udiv i8 %t0, %x
    call void @use8(i8 %t1)
    %r = icmp ne i8 %t1, %y
    ret i1 %r
  }
  
  ; Negative tests
  
  define i1 @n8_different_x(i8 %x0, i8 %x1, i8 %y) {
  ; CHECK-LABEL: @n8_different_x(
  ; CHECK-NEXT:    [[T0:%.*]] = mul i8 [[X0:%.*]], [[Y:%.*]]
  ; CHECK-NEXT:    [[T1:%.*]] = udiv i8 [[T0]], [[X1:%.*]]
  ; CHECK-NEXT:    [[R:%.*]] = icmp ne i8 [[T1]], [[Y]]
  ; CHECK-NEXT:    ret i1 [[R]]
  ;
    %t0 = mul i8 %x0, %y
    %t1 = udiv i8 %t0, %x1
    %r = icmp ne i8 %t1, %y
    ret i1 %r
  }
  
  define i1 @n9_different_y(i8 %x, i8 %y0, i8 %y1) {
  ; CHECK-LABEL: @n9_different_y(
  ; CHECK-NEXT:    [[T0:%.*]] = mul i8 [[X:%.*]], [[Y0:%.*]]
  ; CHECK-NEXT:    [[T1:%.*]] = udiv i8 [[T0]], [[X]]
  ; CHECK-NEXT:    [[R:%.*]] = icmp ne i8 [[T1]], [[Y1:%.*]]
  ; CHECK-NEXT:    ret i1 [[R]]
  ;
    %t0 = mul i8 %x, %y0
    %t1 = udiv i8 %t0, %x
    %r = icmp ne i8 %t1, %y1
    ret i1 %r
  }
  
  define i1 @n10_wrong_pred(i8 %x, i8 %y) {
  ; CHECK-LABEL: @n10_wrong_pred(
  ; CHECK-NEXT:    [[T0:%.*]] = mul i8 [[X:%.*]], [[Y:%.*]]
  ; CHECK-NEXT:    [[T1:%.*]] = udiv i8 [[T0]], [[X]]
  ; CHECK-NEXT:    [[R:%.*]] = icmp ugt i8 [[T1]], [[Y]]
  ; CHECK-NEXT:    ret i1 [[R]]
  ;
    %t0 = mul i8 %x, %y
    %t1 = udiv i8 %t0, %x
    %r = icmp ugt i8 %t1, %y
    ret i1 %r
  }
  