test/Transforms/InstCombine/sub-minmax.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature
; RUN: opt < %s -passes=instcombine -S | FileCheck %s

declare i5 @llvm.umin.i5(i5, i5)
declare <2 x i8> @llvm.smin.v2i8(<2 x i8>, <2 x i8>)
declare <2 x i8> @llvm.smax.v2i8(<2 x i8>, <2 x i8>)
declare <2 x i8> @llvm.umin.v2i8(<2 x i8>, <2 x i8>)
declare <2 x i8> @llvm.umax.v2i8(<2 x i8>, <2 x i8>)

declare i8 @llvm.smax.i8(i8, i8)
declare i8 @llvm.smin.i8(i8, i8)
declare i8 @llvm.umax.i8(i8, i8)
declare i8 @llvm.umin.i8(i8, i8)

define i32 @max_na_b_minux_na(i32 %A, i32 %B) {
; CHECK-LABEL: define {{[^@]+}}@max_na_b_minux_na
; CHECK-SAME: (i32 [[A:%.*]], i32 [[B:%.*]]) {
; CHECK-NEXT:    [[NOT:%.*]] = xor i32 [[A]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.usub.sat.i32(i32 [[NOT]], i32 [[B]])
; CHECK-NEXT:    [[X:%.*]] = sub i32 0, [[TMP1]]
; CHECK-NEXT:    ret i32 [[X]]
;
  %not = xor i32 %A, -1
  %l0 = icmp ult i32 %not, %B
  %l1 = select i1 %l0, i32 %not, i32 %B
  %x = sub i32 %l1, %not
  ret i32 %x
}

define i32 @na_minus_max_na_b(i32 %A, i32 %B) {
; CHECK-LABEL: define {{[^@]+}}@na_minus_max_na_b
; CHECK-SAME: (i32 [[A:%.*]], i32 [[B:%.*]]) {
; CHECK-NEXT:    [[NOT:%.*]] = xor i32 [[A]], -1
; CHECK-NEXT:    [[X:%.*]] = call i32 @llvm.usub.sat.i32(i32 [[NOT]], i32 [[B]])
; CHECK-NEXT:    ret i32 [[X]]
;
  %not = xor i32 %A, -1
  %l0 = icmp ult i32 %not, %B
  %l1 = select i1 %l0, i32 %not, i32 %B
  %x = sub i32 %not, %l1
  ret i32 %x
}

define i5 @sub_umin(i5 %a, i5 %b) {
; CHECK-LABEL: define {{[^@]+}}@sub_umin
; CHECK-SAME: (i5 [[A:%.*]], i5 [[B:%.*]]) {
; CHECK-NEXT:    [[R:%.*]] = call i5 @llvm.usub.sat.i5(i5 [[A]], i5 [[B]])
; CHECK-NEXT:    ret i5 [[R]]
;
  %umin = call i5 @llvm.umin.i5(i5 %a, i5 %b)
  %r = sub i5 %a, %umin
  ret i5 %r
}

define <2 x i8> @sub_umin_commute_vec(<2 x i8> %a, <2 x i8> %b) {
; CHECK-LABEL: define {{[^@]+}}@sub_umin_commute_vec
; CHECK-SAME: (<2 x i8> [[A:%.*]], <2 x i8> [[B:%.*]]) {
; CHECK-NEXT:    [[R:%.*]] = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> [[B]], <2 x i8> [[A]])
; CHECK-NEXT:    ret <2 x i8> [[R]]
;
  %umin = call <2 x i8> @llvm.umin.v2i8(<2 x i8> %b, <2 x i8> %a)
  %r = sub <2 x i8> %b, %umin
  ret <2 x i8> %r
}

define i5 @sub_umin_uses(i5 %a, i5 %b, ptr %p) {
; CHECK-LABEL: define {{[^@]+}}@sub_umin_uses
; CHECK-SAME: (i5 [[A:%.*]], i5 [[B:%.*]], ptr [[P:%.*]]) {
; CHECK-NEXT:    [[UMIN:%.*]] = call i5 @llvm.umin.i5(i5 [[A]], i5 [[B]])
; CHECK-NEXT:    store i5 [[UMIN]], ptr [[P]], align 1
; CHECK-NEXT:    [[R:%.*]] = sub i5 [[A]], [[UMIN]]
; CHECK-NEXT:    ret i5 [[R]]
;
  %umin = call i5 @llvm.umin.i5(i5 %a, i5 %b)
  store i5 %umin, ptr %p
  %r = sub i5 %a, %umin
  ret i5 %r
}

define i5 @sub_umin_no_common_op(i5 %a, i5 %b, i5 %c) {
; CHECK-LABEL: define {{[^@]+}}@sub_umin_no_common_op
; CHECK-SAME: (i5 [[A:%.*]], i5 [[B:%.*]], i5 [[C:%.*]]) {
; CHECK-NEXT:    [[UMIN:%.*]] = call i5 @llvm.umin.i5(i5 [[A]], i5 [[B]])
; CHECK-NEXT:    [[R:%.*]] = sub i5 [[C]], [[UMIN]]
; CHECK-NEXT:    ret i5 [[R]]
;
  %umin = call i5 @llvm.umin.i5(i5 %a, i5 %b)
  %r = sub i5 %c, %umin
  ret i5 %r
}

define i32 @max_b_na_minus_na(i32 %A, i32 %B) {
; CHECK-LABEL: define {{[^@]+}}@max_b_na_minus_na
; CHECK-SAME: (i32 [[A:%.*]], i32 [[B:%.*]]) {
; CHECK-NEXT:    [[NOT:%.*]] = xor i32 [[A]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.usub.sat.i32(i32 [[NOT]], i32 [[B]])
; CHECK-NEXT:    [[X:%.*]] = sub i32 0, [[TMP1]]
; CHECK-NEXT:    ret i32 [[X]]
;
  %not = xor i32 %A, -1
  %l0 = icmp ugt i32 %not, %B
  %l1 = select i1 %l0, i32 %B, i32 %not
  %x = sub i32 %l1, %not
  ret i32 %x
}

define i32 @na_minus_max_b_na(i32 %A, i32 %B) {
; CHECK-LABEL: define {{[^@]+}}@na_minus_max_b_na
; CHECK-SAME: (i32 [[A:%.*]], i32 [[B:%.*]]) {
; CHECK-NEXT:    [[NOT:%.*]] = xor i32 [[A]], -1
; CHECK-NEXT:    [[X:%.*]] = call i32 @llvm.usub.sat.i32(i32 [[NOT]], i32 [[B]])
; CHECK-NEXT:    ret i32 [[X]]
;
  %not = xor i32 %A, -1
  %l0 = icmp ugt i32 %not, %B
  %l1 = select i1 %l0, i32 %B, i32 %not
  %x = sub i32 %not, %l1
  ret i32 %x
}


define i32 @max_na_bi_minux_na(i32 %A, i32 %Bi) {
; CHECK-LABEL: define {{[^@]+}}@max_na_bi_minux_na
; CHECK-SAME: (i32 [[A:%.*]], i32 [[BI:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.usub.sat.i32(i32 [[BI]], i32 [[A]])
; CHECK-NEXT:    [[X:%.*]] = sub i32 0, [[TMP1]]
; CHECK-NEXT:    ret i32 [[X]]
;
  %B =  xor i32 %Bi, -1
  %not = xor i32 %A, -1
  %l0 = icmp ult i32 %not, %B
  %l1 = select i1 %l0, i32 %not, i32 %B
  %x = sub i32 %l1, %not
  ret i32 %x
}

define i32 @na_minus_max_na_bi(i32 %A, i32 %Bi) {
; CHECK-LABEL: define {{[^@]+}}@na_minus_max_na_bi
; CHECK-SAME: (i32 [[A:%.*]], i32 [[BI:%.*]]) {
; CHECK-NEXT:    [[X:%.*]] = call i32 @llvm.usub.sat.i32(i32 [[BI]], i32 [[A]])
; CHECK-NEXT:    ret i32 [[X]]
;
  %B =  xor i32 %Bi, -1
  %not = xor i32 %A, -1
  %l0 = icmp ult i32 %not, %B
  %l1 = select i1 %l0, i32 %not, i32 %B
  %x = sub i32 %not, %l1
  ret i32 %x
}

define i32 @max_bi_na_minus_na(i32 %A, i32 %Bi) {
; CHECK-LABEL: define {{[^@]+}}@max_bi_na_minus_na
; CHECK-SAME: (i32 [[A:%.*]], i32 [[BI:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.usub.sat.i32(i32 [[BI]], i32 [[A]])
; CHECK-NEXT:    [[X:%.*]] = sub i32 0, [[TMP1]]
; CHECK-NEXT:    ret i32 [[X]]
;
  %B =  xor i32 %Bi, -1
  %not = xor i32 %A, -1
  %l0 = icmp ugt i32 %not, %B
  %l1 = select i1 %l0, i32 %B, i32 %not
  %x = sub i32 %l1, %not
  ret i32 %x
}

define i32 @na_minus_max_bi_na(i32 %A, i32 %Bi) {
; CHECK-LABEL: define {{[^@]+}}@na_minus_max_bi_na
; CHECK-SAME: (i32 [[A:%.*]], i32 [[BI:%.*]]) {
; CHECK-NEXT:    [[X:%.*]] = call i32 @llvm.usub.sat.i32(i32 [[BI]], i32 [[A]])
; CHECK-NEXT:    ret i32 [[X]]
;
  %B =  xor i32 %Bi, -1
  %not = xor i32 %A, -1
  %l0 = icmp ugt i32 %not, %B
  %l1 = select i1 %l0, i32 %B, i32 %not
  %x = sub i32 %not, %l1
  ret i32 %x
}


define i32 @max_na_bi_minux_na_use(i32 %A, i32 %Bi) {
; CHECK-LABEL: define {{[^@]+}}@max_na_bi_minux_na_use
; CHECK-SAME: (i32 [[A:%.*]], i32 [[BI:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.umax.i32(i32 [[A]], i32 -32)
; CHECK-NEXT:    [[L1:%.*]] = xor i32 [[TMP1]], -1
; CHECK-NEXT:    [[X:%.*]] = sub i32 [[A]], [[TMP1]]
; CHECK-NEXT:    call void @use32(i32 [[L1]])
; CHECK-NEXT:    ret i32 [[X]]
;
  %not = xor i32 %A, -1
  %l0 = icmp ult i32 %not, 31
  %l1 = select i1 %l0, i32 %not, i32 31
  %x = sub i32 %l1, %not
  call void @use32(i32 %l1)
  ret i32 %x
}

define i32 @na_minus_max_na_bi_use(i32 %A, i32 %Bi) {
; CHECK-LABEL: define {{[^@]+}}@na_minus_max_na_bi_use
; CHECK-SAME: (i32 [[A:%.*]], i32 [[BI:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.umax.i32(i32 [[A]], i32 -32)
; CHECK-NEXT:    [[L1:%.*]] = xor i32 [[TMP1]], -1
; CHECK-NEXT:    [[X:%.*]] = sub i32 [[TMP1]], [[A]]
; CHECK-NEXT:    call void @use32(i32 [[L1]])
; CHECK-NEXT:    ret i32 [[X]]
;
  %not = xor i32 %A, -1
  %l0 = icmp ult i32 %not, 31
  %l1 = select i1 %l0, i32 %not, i32 31
  %x = sub i32 %not, %l1
  call void @use32(i32 %l1)
  ret i32 %x
}

define i32 @max_bi_na_minus_na_use(i32 %A, i32 %Bi) {
; CHECK-LABEL: define {{[^@]+}}@max_bi_na_minus_na_use
; CHECK-SAME: (i32 [[A:%.*]], i32 [[BI:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.umax.i32(i32 [[BI]], i32 [[A]])
; CHECK-NEXT:    [[L1:%.*]] = xor i32 [[TMP1]], -1
; CHECK-NEXT:    [[X:%.*]] = sub i32 [[A]], [[TMP1]]
; CHECK-NEXT:    call void @use32(i32 [[L1]])
; CHECK-NEXT:    ret i32 [[X]]
;
  %not = xor i32 %A, -1
  %B = xor i32 %Bi, -1
  %l0 = icmp ult i32 %B, %not
  %l1 = select i1 %l0, i32 %B, i32 %not
  %x = sub i32 %l1, %not
  call void @use32(i32 %l1)
  ret i32 %x
}

define i32 @na_minus_max_bi_na_use(i32 %A, i32 %Bi) {
; CHECK-LABEL: define {{[^@]+}}@na_minus_max_bi_na_use
; CHECK-SAME: (i32 [[A:%.*]], i32 [[BI:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.umax.i32(i32 [[BI]], i32 [[A]])
; CHECK-NEXT:    [[L1:%.*]] = xor i32 [[TMP1]], -1
; CHECK-NEXT:    [[X:%.*]] = sub i32 [[TMP1]], [[A]]
; CHECK-NEXT:    call void @use32(i32 [[L1]])
; CHECK-NEXT:    ret i32 [[X]]
;
  %not = xor i32 %A, -1
  %B = xor i32 %Bi, -1
  %l0 = icmp ult i32 %B, %not
  %l1 = select i1 %l0, i32 %B, i32 %not
  %x = sub i32 %not, %l1
  call void @use32(i32 %l1)
  ret i32 %x
}


define i32 @max_na_bi_minux_na_use2(i32 %A, i32 %Bi) {
; CHECK-LABEL: define {{[^@]+}}@max_na_bi_minux_na_use2
; CHECK-SAME: (i32 [[A:%.*]], i32 [[BI:%.*]]) {
; CHECK-NEXT:    [[NOT:%.*]] = xor i32 [[A]], -1
; CHECK-NEXT:    [[L1:%.*]] = call i32 @llvm.umin.i32(i32 [[NOT]], i32 31)
; CHECK-NEXT:    [[X:%.*]] = sub i32 [[L1]], [[NOT]]
; CHECK-NEXT:    call void @use32(i32 [[L1]])
; CHECK-NEXT:    call void @use32(i32 [[NOT]])
; CHECK-NEXT:    ret i32 [[X]]
;
  %not = xor i32 %A, -1
  %l0 = icmp ult i32 %not, 31
  %l1 = select i1 %l0, i32 %not, i32 31
  %x = sub i32 %l1, %not
  call void @use32(i32 %l1)
  call void @use32(i32 %not)
  ret i32 %x
}

define i32 @na_minus_max_na_bi_use2(i32 %A, i32 %Bi) {
; CHECK-LABEL: define {{[^@]+}}@na_minus_max_na_bi_use2
; CHECK-SAME: (i32 [[A:%.*]], i32 [[BI:%.*]]) {
; CHECK-NEXT:    [[NOT:%.*]] = xor i32 [[A]], -1
; CHECK-NEXT:    [[L1:%.*]] = call i32 @llvm.umin.i32(i32 [[NOT]], i32 31)
; CHECK-NEXT:    [[X:%.*]] = sub i32 [[NOT]], [[L1]]
; CHECK-NEXT:    call void @use32(i32 [[L1]])
; CHECK-NEXT:    call void @use32(i32 [[NOT]])
; CHECK-NEXT:    ret i32 [[X]]
;
  %not = xor i32 %A, -1
  %l0 = icmp ult i32 %not, 31
  %l1 = select i1 %l0, i32 %not, i32 31
  %x = sub i32 %not, %l1
  call void @use32(i32 %l1)
  call void @use32(i32 %not)
  ret i32 %x
}

define i32 @max_bi_na_minus_na_use2(i32 %A, i32 %Bi) {
; CHECK-LABEL: define {{[^@]+}}@max_bi_na_minus_na_use2
; CHECK-SAME: (i32 [[A:%.*]], i32 [[BI:%.*]]) {
; CHECK-NEXT:    [[NOT:%.*]] = xor i32 [[A]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.umax.i32(i32 [[BI]], i32 [[A]])
; CHECK-NEXT:    [[L1:%.*]] = xor i32 [[TMP1]], -1
; CHECK-NEXT:    [[X:%.*]] = sub i32 [[A]], [[TMP1]]
; CHECK-NEXT:    call void @use32(i32 [[L1]])
; CHECK-NEXT:    call void @use32(i32 [[NOT]])
; CHECK-NEXT:    ret i32 [[X]]
;
  %not = xor i32 %A, -1
  %B = xor i32 %Bi, -1
  %l0 = icmp ult i32 %B, %not
  %l1 = select i1 %l0, i32 %B, i32 %not
  %x = sub i32 %l1, %not
  call void @use32(i32 %l1)
  call void @use32(i32 %not)
  ret i32 %x
}

define i32 @na_minus_max_bi_na_use2(i32 %A, i32 %Bi) {
; CHECK-LABEL: define {{[^@]+}}@na_minus_max_bi_na_use2
; CHECK-SAME: (i32 [[A:%.*]], i32 [[BI:%.*]]) {
; CHECK-NEXT:    [[NOT:%.*]] = xor i32 [[A]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.umax.i32(i32 [[BI]], i32 [[A]])
; CHECK-NEXT:    [[L1:%.*]] = xor i32 [[TMP1]], -1
; CHECK-NEXT:    [[X:%.*]] = sub i32 [[TMP1]], [[A]]
; CHECK-NEXT:    call void @use32(i32 [[L1]])
; CHECK-NEXT:    call void @use32(i32 [[NOT]])
; CHECK-NEXT:    ret i32 [[X]]
;
  %not = xor i32 %A, -1
  %B = xor i32 %Bi, -1
  %l0 = icmp ult i32 %B, %not
  %l1 = select i1 %l0, i32 %B, i32 %not
  %x = sub i32 %not, %l1
  call void @use32(i32 %l1)
  call void @use32(i32 %not)
  ret i32 %x
}

define i8 @umin_not_sub(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@umin_not_sub
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call i8 @llvm.umax.i8(i8 [[X]], i8 [[Y]])
; CHECK-NEXT:    [[MINXY:%.*]] = xor i8 [[TMP1]], -1
; CHECK-NEXT:    [[SUBX:%.*]] = sub i8 [[TMP1]], [[X]]
; CHECK-NEXT:    [[SUBY:%.*]] = sub i8 [[TMP1]], [[Y]]
; CHECK-NEXT:    call void @use8(i8 [[SUBX]])
; CHECK-NEXT:    call void @use8(i8 [[SUBY]])
; CHECK-NEXT:    ret i8 [[MINXY]]
;
  %nx = xor i8 %x, -1
  %ny = xor i8 %y, -1
  %cmpxy = icmp ult i8 %nx, %ny
  %minxy = select i1 %cmpxy, i8 %nx, i8 %ny
  %subx = sub i8 %nx, %minxy
  %suby = sub i8 %ny, %minxy
  call void @use8(i8 %subx)
  call void @use8(i8 %suby)
  ret i8 %minxy
}

define i8 @umin_not_sub_rev(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@umin_not_sub_rev
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call i8 @llvm.umax.i8(i8 [[X]], i8 [[Y]])
; CHECK-NEXT:    [[MINXY:%.*]] = xor i8 [[TMP1]], -1
; CHECK-NEXT:    [[SUBX:%.*]] = sub i8 [[X]], [[TMP1]]
; CHECK-NEXT:    [[SUBY:%.*]] = sub i8 [[Y]], [[TMP1]]
; CHECK-NEXT:    call void @use8(i8 [[SUBX]])
; CHECK-NEXT:    call void @use8(i8 [[SUBY]])
; CHECK-NEXT:    ret i8 [[MINXY]]
;
  %nx = xor i8 %x, -1
  %ny = xor i8 %y, -1
  %cmpxy = icmp ult i8 %nx, %ny
  %minxy = select i1 %cmpxy, i8 %nx, i8 %ny
  %subx = sub i8 %minxy, %nx
  %suby = sub i8 %minxy, %ny
  call void @use8(i8 %subx)
  call void @use8(i8 %suby)
  ret i8 %minxy
}

define void @umin3_not_all_ops_extra_uses_invert_subs(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: define {{[^@]+}}@umin3_not_all_ops_extra_uses_invert_subs
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]], i8 [[Z:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call i8 @llvm.umax.i8(i8 [[X]], i8 [[Z]])
; CHECK-NEXT:    [[TMP2:%.*]] = call i8 @llvm.umax.i8(i8 [[Y]], i8 [[TMP1]])
; CHECK-NEXT:    [[MINXYZ:%.*]] = xor i8 [[TMP2]], -1
; CHECK-NEXT:    [[XMIN:%.*]] = sub i8 [[TMP2]], [[X]]
; CHECK-NEXT:    [[YMIN:%.*]] = sub i8 [[TMP2]], [[Y]]
; CHECK-NEXT:    [[ZMIN:%.*]] = sub i8 [[TMP2]], [[Z]]
; CHECK-NEXT:    call void @use8(i8 [[MINXYZ]])
; CHECK-NEXT:    call void @use8(i8 [[XMIN]])
; CHECK-NEXT:    call void @use8(i8 [[YMIN]])
; CHECK-NEXT:    call void @use8(i8 [[ZMIN]])
; CHECK-NEXT:    ret void
;
  %xn = xor i8 %x, -1
  %yn = xor i8 %y, -1
  %zn = xor i8 %z, -1
  %cmpxz = icmp ult i8 %xn, %zn
  %minxz = select i1 %cmpxz, i8 %xn, i8 %zn
  %cmpxyz = icmp ult i8 %minxz, %yn
  %minxyz = select i1 %cmpxyz, i8 %minxz, i8 %yn
  %xmin = sub i8 %xn, %minxyz
  %ymin = sub i8 %yn, %minxyz
  %zmin = sub i8 %zn, %minxyz
  call void @use8(i8 %minxyz)
  call void @use8(i8 %xmin)
  call void @use8(i8 %ymin)
  call void @use8(i8 %zmin)
  ret void
}

; Handle this pattern with extra uses because it shows up in benchmarks.
; ~X - Min/Max(~X, Y) -> ~Min/Max(X, ~Y) - X
; ~X - Min/Max(Y, ~X) -> ~Min/Max(X, ~Y) - X
; Min/Max(~X, Y) - ~X -> X - ~Min/Max(X, ~Y)
; Min/Max(Y, ~X) - ~X -> X - ~Min/Max(X, ~Y)

define i8 @umin_not_sub_intrinsic_commute0(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@umin_not_sub_intrinsic_commute0
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[NY:%.*]] = xor i8 [[Y]], -1
; CHECK-NEXT:    call void @use8(i8 [[NY]])
; CHECK-NEXT:    [[TMP1:%.*]] = call i8 @llvm.umax.i8(i8 [[X]], i8 [[Y]])
; CHECK-NEXT:    [[M:%.*]] = xor i8 [[TMP1]], -1
; CHECK-NEXT:    call void @use8(i8 [[M]])
; CHECK-NEXT:    [[SUBX:%.*]] = sub i8 [[TMP1]], [[X]]
; CHECK-NEXT:    ret i8 [[SUBX]]
;
  %nx = xor i8 %x, -1
  %ny = xor i8 %y, -1
  call void @use8(i8 %ny)
  %m = call i8 @llvm.umin.i8(i8 %nx, i8 %ny)
  call void @use8(i8 %m)
  %subx = sub i8 %nx, %m
  ret i8 %subx
}

define i8 @umax_not_sub_intrinsic_commute1(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@umax_not_sub_intrinsic_commute1
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[NY:%.*]] = xor i8 [[Y]], -1
; CHECK-NEXT:    call void @use8(i8 [[NY]])
; CHECK-NEXT:    [[TMP1:%.*]] = call i8 @llvm.umin.i8(i8 [[X]], i8 [[Y]])
; CHECK-NEXT:    [[M:%.*]] = xor i8 [[TMP1]], -1
; CHECK-NEXT:    call void @use8(i8 [[M]])
; CHECK-NEXT:    [[SUBX:%.*]] = sub i8 [[TMP1]], [[X]]
; CHECK-NEXT:    ret i8 [[SUBX]]
;
  %nx = xor i8 %x, -1
  %ny = xor i8 %y, -1
  call void @use8(i8 %ny)
  %m = call i8 @llvm.umax.i8(i8 %ny, i8 %nx)
  call void @use8(i8 %m)
  %subx = sub i8 %nx, %m
  ret i8 %subx
}

define i8 @smin_not_sub_intrinsic_commute2(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@smin_not_sub_intrinsic_commute2
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[NY:%.*]] = xor i8 [[Y]], -1
; CHECK-NEXT:    call void @use8(i8 [[NY]])
; CHECK-NEXT:    [[TMP1:%.*]] = call i8 @llvm.smax.i8(i8 [[X]], i8 [[Y]])
; CHECK-NEXT:    [[M:%.*]] = xor i8 [[TMP1]], -1
; CHECK-NEXT:    call void @use8(i8 [[M]])
; CHECK-NEXT:    [[SUBX:%.*]] = sub i8 [[X]], [[TMP1]]
; CHECK-NEXT:    ret i8 [[SUBX]]
;
  %nx = xor i8 %x, -1
  %ny = xor i8 %y, -1
  call void @use8(i8 %ny)
  %m = call i8 @llvm.smin.i8(i8 %nx, i8 %ny)
  call void @use8(i8 %m)
  %subx = sub i8 %m, %nx
  ret i8 %subx
}

define i8 @smax_not_sub_intrinsic_commute3(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@smax_not_sub_intrinsic_commute3
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[NY:%.*]] = xor i8 [[Y]], -1
; CHECK-NEXT:    call void @use8(i8 [[NY]])
; CHECK-NEXT:    [[TMP1:%.*]] = call i8 @llvm.smin.i8(i8 [[X]], i8 [[Y]])
; CHECK-NEXT:    [[M:%.*]] = xor i8 [[TMP1]], -1
; CHECK-NEXT:    call void @use8(i8 [[M]])
; CHECK-NEXT:    [[SUBX:%.*]] = sub i8 [[X]], [[TMP1]]
; CHECK-NEXT:    ret i8 [[SUBX]]
;
  %nx = xor i8 %x, -1
  %ny = xor i8 %y, -1
  call void @use8(i8 %ny)
  %m = call i8 @llvm.smax.i8(i8 %ny, i8 %nx)
  call void @use8(i8 %m)
  %subx = sub i8 %m, %nx
  ret i8 %subx
}

; negative test - don't increase instruction count

define i8 @umin_not_sub_intrinsic_uses(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@umin_not_sub_intrinsic_uses
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[NX:%.*]] = xor i8 [[X]], -1
; CHECK-NEXT:    call void @use8(i8 [[NX]])
; CHECK-NEXT:    [[NY:%.*]] = xor i8 [[Y]], -1
; CHECK-NEXT:    call void @use8(i8 [[NY]])
; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umin.i8(i8 [[NX]], i8 [[NY]])
; CHECK-NEXT:    call void @use8(i8 [[M]])
; CHECK-NEXT:    [[SUBX:%.*]] = sub i8 [[NX]], [[M]]
; CHECK-NEXT:    ret i8 [[SUBX]]
;
  %nx = xor i8 %x, -1
  call void @use8(i8 %nx)
  %ny = xor i8 %y, -1
  call void @use8(i8 %ny)
  %m = call i8 @llvm.umin.i8(i8 %nx, i8 %ny)
  call void @use8(i8 %m)
  %subx = sub i8 %nx, %m
  ret i8 %subx
}

define i8 @umax_sub_op0(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@umax_sub_op0
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[R:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[X]], i8 [[Y]])
; CHECK-NEXT:    ret i8 [[R]]
;
  %u = call i8 @llvm.umax.i8(i8 %y, i8 %x)
  %r = sub i8 %u, %y
  ret i8 %r
}

define <2 x i8> @umax_sub_op0_vec_commute(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: define {{[^@]+}}@umax_sub_op0_vec_commute
; CHECK-SAME: (<2 x i8> [[X:%.*]], <2 x i8> [[Y:%.*]]) {
; CHECK-NEXT:    [[R:%.*]] = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> [[X]], <2 x i8> [[Y]])
; CHECK-NEXT:    ret <2 x i8> [[R]]
;
  %u = call <2 x i8> @llvm.umax.v2i8(<2 x i8> %x, <2 x i8> %y)
  %r = sub <2 x i8> %u, %y
  ret <2 x i8> %r
}

define i8 @umax_sub_op0_use(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@umax_sub_op0_use
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[U:%.*]] = call i8 @llvm.umax.i8(i8 [[X]], i8 [[Y]])
; CHECK-NEXT:    call void @use8(i8 [[U]])
; CHECK-NEXT:    [[R:%.*]] = sub i8 [[U]], [[Y]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %u = call i8 @llvm.umax.i8(i8 %x, i8 %y)
  call void @use8(i8 %u)
  %r = sub i8 %u, %y
  ret i8 %r
}

define i8 @umax_sub_op1(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@umax_sub_op1
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[X]], i8 [[Y]])
; CHECK-NEXT:    [[R:%.*]] = sub i8 0, [[TMP1]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %u = call i8 @llvm.umax.i8(i8 %x, i8 %y)
  %r = sub i8 %y, %u
  ret i8 %r
}

define <2 x i8> @umax_sub_op1_vec_commute(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: define {{[^@]+}}@umax_sub_op1_vec_commute
; CHECK-SAME: (<2 x i8> [[X:%.*]], <2 x i8> [[Y:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> [[X]], <2 x i8> [[Y]])
; CHECK-NEXT:    [[R:%.*]] = sub <2 x i8> zeroinitializer, [[TMP1]]
; CHECK-NEXT:    ret <2 x i8> [[R]]
;
  %u = call <2 x i8> @llvm.umax.v2i8(<2 x i8> %y, <2 x i8> %x)
  %r = sub <2 x i8> %y, %u
  ret <2 x i8> %r
}

define i8 @umax_sub_op1_use(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@umax_sub_op1_use
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[U:%.*]] = call i8 @llvm.umax.i8(i8 [[X]], i8 [[Y]])
; CHECK-NEXT:    call void @use8(i8 [[U]])
; CHECK-NEXT:    [[R:%.*]] = sub i8 [[Y]], [[U]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %u = call i8 @llvm.umax.i8(i8 %x, i8 %y)
  call void @use8(i8 %u)
  %r = sub i8 %y, %u
  ret i8 %r
}

define i8 @umin_sub_op1(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@umin_sub_op1
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[R:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[Y]], i8 [[X]])
; CHECK-NEXT:    ret i8 [[R]]
;
  %u = call i8 @llvm.umin.i8(i8 %y, i8 %x)
  %r = sub i8 %y, %u
  ret i8 %r
}

define i8 @umin_sub_op1_commute(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@umin_sub_op1_commute
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[R:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[Y]], i8 [[X]])
; CHECK-NEXT:    ret i8 [[R]]
;
  %u = call i8 @llvm.umin.i8(i8 %x, i8 %y)
  %r = sub i8 %y, %u
  ret i8 %r
}

define i8 @umin_sub_op0(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@umin_sub_op0
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[Y]], i8 [[X]])
; CHECK-NEXT:    [[R:%.*]] = sub i8 0, [[TMP1]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %u = call i8 @llvm.umin.i8(i8 %y, i8 %x)
  %r = sub i8 %u, %y
  ret i8 %r
}

define i8 @umin_sub_op0_commute(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@umin_sub_op0_commute
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[Y]], i8 [[X]])
; CHECK-NEXT:    [[R:%.*]] = sub i8 0, [[TMP1]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %u = call i8 @llvm.umin.i8(i8 %x, i8 %y)
  %r = sub i8 %u, %y
  ret i8 %r
}

define i8 @umin_sub_op1_use(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@umin_sub_op1_use
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[U:%.*]] = call i8 @llvm.umin.i8(i8 [[Y]], i8 [[X]])
; CHECK-NEXT:    call void @use8(i8 [[U]])
; CHECK-NEXT:    [[R:%.*]] = sub i8 [[Y]], [[U]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %u = call i8 @llvm.umin.i8(i8 %y, i8 %x)
  call void @use8(i8 %u)
  %r = sub i8 %y, %u
  ret i8 %r
}

define i8 @umin_sub_op0_use(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@umin_sub_op0_use
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[U:%.*]] = call i8 @llvm.umin.i8(i8 [[Y]], i8 [[X]])
; CHECK-NEXT:    call void @use8(i8 [[U]])
; CHECK-NEXT:    [[R:%.*]] = sub i8 [[U]], [[Y]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %u = call i8 @llvm.umin.i8(i8 %y, i8 %x)
  call void @use8(i8 %u)
  %r = sub i8 %u, %y
  ret i8 %r
}

;
; sub(add(X,Y), s/umin(X,Y)) --> s/umax(X,Y)
; sub(add(X,Y), s/umax(X,Y)) --> s/umin(X,Y)
;

define i8 @diff_add_smin(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@diff_add_smin
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[S:%.*]] = call i8 @llvm.smax.i8(i8 [[X]], i8 [[Y]])
; CHECK-NEXT:    ret i8 [[S]]
;
  %a = add i8 %x, %y
  %m = call i8 @llvm.smin.i8(i8 %x, i8 %y)
  %s = sub i8 %a, %m
  ret i8 %s
}

define i8 @diff_add_smax(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@diff_add_smax
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[S:%.*]] = call i8 @llvm.smin.i8(i8 [[Y]], i8 [[X]])
; CHECK-NEXT:    ret i8 [[S]]
;
  %a = add i8 %x, %y
  %m = call i8 @llvm.smax.i8(i8 %y, i8 %x)
  %s = sub i8 %a, %m
  ret i8 %s
}

define i8 @diff_add_umin(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@diff_add_umin
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[S:%.*]] = call i8 @llvm.umax.i8(i8 [[X]], i8 [[Y]])
; CHECK-NEXT:    ret i8 [[S]]
;
  %a = add i8 %x, %y
  %m = call i8 @llvm.umin.i8(i8 %x, i8 %y)
  %s = sub i8 %a, %m
  ret i8 %s
}

define i8 @diff_add_umax(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@diff_add_umax
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[S:%.*]] = call i8 @llvm.umin.i8(i8 [[Y]], i8 [[X]])
; CHECK-NEXT:    ret i8 [[S]]
;
  %a = add i8 %x, %y
  %m = call i8 @llvm.umax.i8(i8 %y, i8 %x)
  %s = sub i8 %a, %m
  ret i8 %s
}

define i8 @diff_add_smin_use(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@diff_add_smin_use
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.smin.i8(i8 [[X]], i8 [[Y]])
; CHECK-NEXT:    [[S:%.*]] = call i8 @llvm.smax.i8(i8 [[X]], i8 [[Y]])
; CHECK-NEXT:    call void @use8(i8 [[M]])
; CHECK-NEXT:    ret i8 [[S]]
;
  %a = add i8 %x, %y
  %m = call i8 @llvm.smin.i8(i8 %x, i8 %y)
  %s = sub i8 %a, %m
  call void @use8(i8 %m)
  ret i8 %s
}

define i8 @diff_add_use_smax(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@diff_add_use_smax
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[A:%.*]] = add i8 [[X]], [[Y]]
; CHECK-NEXT:    [[S:%.*]] = call i8 @llvm.smin.i8(i8 [[Y]], i8 [[X]])
; CHECK-NEXT:    call void @use8(i8 [[A]])
; CHECK-NEXT:    ret i8 [[S]]
;
  %a = add i8 %x, %y
  %m = call i8 @llvm.smax.i8(i8 %y, i8 %x)
  %s = sub i8 %a, %m
  call void @use8(i8 %a)
  ret i8 %s
}

define i8 @diff_add_use_umin_use(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@diff_add_use_umin_use
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[A:%.*]] = add i8 [[X]], [[Y]]
; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umin.i8(i8 [[X]], i8 [[Y]])
; CHECK-NEXT:    [[S:%.*]] = sub i8 [[A]], [[M]]
; CHECK-NEXT:    call void @use8(i8 [[A]])
; CHECK-NEXT:    call void @use8(i8 [[M]])
; CHECK-NEXT:    ret i8 [[S]]
;
  %a = add i8 %x, %y
  %m = call i8 @llvm.umin.i8(i8 %x, i8 %y)
  %s = sub i8 %a, %m
  call void @use8(i8 %a)
  call void @use8(i8 %m)
  ret i8 %s
}

; sub(add(X,Y),umin(Y,Z)) --> add(X,usubsat(Y,Z))

define i8 @sub_add_umin(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: define {{[^@]+}}@sub_add_umin
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]], i8 [[Z:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[Y]], i8 [[Z]])
; CHECK-NEXT:    [[S:%.*]] = add i8 [[TMP1]], [[X]]
; CHECK-NEXT:    ret i8 [[S]]
;
  %a = add i8 %x, %y
  %m = call i8 @llvm.umin.i8(i8 %y, i8 %z)
  %s = sub i8 %a, %m
  ret i8 %s
}

define i8 @sub_add_umin_commute_umin(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: define {{[^@]+}}@sub_add_umin_commute_umin
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]], i8 [[Z:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[Y]], i8 [[Z]])
; CHECK-NEXT:    [[S:%.*]] = add i8 [[TMP1]], [[X]]
; CHECK-NEXT:    ret i8 [[S]]
;
  %a = add i8 %x, %y
  %m = call i8 @llvm.umin.i8(i8 %z, i8 %y)
  %s = sub i8 %a, %m
  ret i8 %s
}

define i8 @sub_add_umin_commute_add(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: define {{[^@]+}}@sub_add_umin_commute_add
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]], i8 [[Z:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[Y]], i8 [[Z]])
; CHECK-NEXT:    [[S:%.*]] = add i8 [[TMP1]], [[X]]
; CHECK-NEXT:    ret i8 [[S]]
;
  %a = add i8 %y, %x
  %m = call i8 @llvm.umin.i8(i8 %y, i8 %z)
  %s = sub i8 %a, %m
  ret i8 %s
}

define i8 @sub_add_umin_commute_add_umin(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: define {{[^@]+}}@sub_add_umin_commute_add_umin
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]], i8 [[Z:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[Y]], i8 [[Z]])
; CHECK-NEXT:    [[S:%.*]] = add i8 [[TMP1]], [[X]]
; CHECK-NEXT:    ret i8 [[S]]
;
  %a = add i8 %y, %x
  %m = call i8 @llvm.umin.i8(i8 %z, i8 %y)
  %s = sub i8 %a, %m
  ret i8 %s
}

define <2 x i8> @sub_add_umin_vec(<2 x i8> %x, <2 x i8> %y, <2 x i8> %z) {
; CHECK-LABEL: define {{[^@]+}}@sub_add_umin_vec
; CHECK-SAME: (<2 x i8> [[X:%.*]], <2 x i8> [[Y:%.*]], <2 x i8> [[Z:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> [[Y]], <2 x i8> [[Z]])
; CHECK-NEXT:    [[S:%.*]] = add <2 x i8> [[TMP1]], [[X]]
; CHECK-NEXT:    ret <2 x i8> [[S]]
;
  %a = add <2 x i8> %x, %y
  %m = call <2 x i8> @llvm.umin.v2i8(<2 x i8> %y, <2 x i8> %z)
  %s = sub <2 x i8> %a, %m
  ret <2 x i8> %s
}

; negative test

define i8 @sub_add_umin_mismatch(i8 %x, i8 %y, i8 %z, i8 %t) {
; CHECK-LABEL: define {{[^@]+}}@sub_add_umin_mismatch
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]], i8 [[Z:%.*]], i8 [[T:%.*]]) {
; CHECK-NEXT:    [[A:%.*]] = add i8 [[X]], [[Y]]
; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umin.i8(i8 [[T]], i8 [[Z]])
; CHECK-NEXT:    [[S:%.*]] = sub i8 [[A]], [[M]]
; CHECK-NEXT:    ret i8 [[S]]
;
  %a = add i8 %x, %y
  %m = call i8 @llvm.umin.i8(i8 %t, i8 %z)
  %s = sub i8 %a, %m
  ret i8 %s
}

define i8 @sub_add_umin_use_a(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: define {{[^@]+}}@sub_add_umin_use_a
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]], i8 [[Z:%.*]]) {
; CHECK-NEXT:    [[A:%.*]] = add i8 [[X]], [[Y]]
; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umin.i8(i8 [[Y]], i8 [[Z]])
; CHECK-NEXT:    [[S:%.*]] = sub i8 [[A]], [[M]]
; CHECK-NEXT:    call void @use8(i8 [[A]])
; CHECK-NEXT:    ret i8 [[S]]
;
  %a = add i8 %x, %y
  %m = call i8 @llvm.umin.i8(i8 %y, i8 %z)
  %s = sub i8 %a, %m
  call void @use8(i8 %a)
  ret i8 %s
}

define i8 @sub_add_umin_use_m(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: define {{[^@]+}}@sub_add_umin_use_m
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]], i8 [[Z:%.*]]) {
; CHECK-NEXT:    [[A:%.*]] = add i8 [[X]], [[Y]]
; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.umin.i8(i8 [[Y]], i8 [[Z]])
; CHECK-NEXT:    [[S:%.*]] = sub i8 [[A]], [[M]]
; CHECK-NEXT:    call void @use8(i8 [[M]])
; CHECK-NEXT:    ret i8 [[S]]
;
  %a = add i8 %x, %y
  %m = call i8 @llvm.umin.i8(i8 %y, i8 %z)
  %s = sub i8 %a, %m
  call void @use8(i8 %m)
  ret i8 %s
}

define <2 x i8> @sub_smax0_sub_nsw(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: define {{[^@]+}}@sub_smax0_sub_nsw
; CHECK-SAME: (<2 x i8> [[X:%.*]], <2 x i8> [[Y:%.*]]) {
; CHECK-NEXT:    [[R:%.*]] = call <2 x i8> @llvm.smin.v2i8(<2 x i8> [[X]], <2 x i8> [[Y]])
; CHECK-NEXT:    ret <2 x i8> [[R]]
;
  %sub = sub nsw <2 x i8> %x, %y
  %m = call <2 x i8> @llvm.smax.v2i8(<2 x i8> %sub, <2 x i8> <i8 0, i8 poison>)
  %r = sub <2 x i8> %x, %m
  ret <2 x i8> %r
}

define i8 @sub_smax0_sub_nsw_use(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@sub_smax0_sub_nsw_use
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i8 [[X]], [[Y]]
; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.smax.i8(i8 [[SUB]], i8 0)
; CHECK-NEXT:    call void @use8(i8 [[M]])
; CHECK-NEXT:    [[R:%.*]] = call i8 @llvm.smin.i8(i8 [[X]], i8 [[Y]])
; CHECK-NEXT:    ret i8 [[R]]
;
  %sub = sub nsw i8 %x, %y
  %m = call i8 @llvm.smax.i8(i8 %sub, i8 0)
  call void @use8(i8 %m)
  %r = sub i8 %x, %m
  ret i8 %r
}

; negative test - must have nsw

define i8 @sub_smax0_sub(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@sub_smax0_sub
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = sub i8 [[X]], [[Y]]
; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.smax.i8(i8 [[SUB]], i8 0)
; CHECK-NEXT:    [[R:%.*]] = sub i8 [[X]], [[M]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %sub = sub i8 %x, %y
  %m = call i8 @llvm.smax.i8(i8 %sub, i8 0)
  %r = sub i8 %x, %m
  ret i8 %r
}

; negative test - wrong op

define i8 @sub_smax0_sub_commute(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@sub_smax0_sub_commute
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i8 [[X]], [[Y]]
; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.smax.i8(i8 [[SUB]], i8 0)
; CHECK-NEXT:    [[R:%.*]] = sub i8 [[M]], [[X]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %sub = sub nsw i8 %x, %y
  %m = call i8 @llvm.smax.i8(i8 %sub, i8 0)
  %r = sub i8 %m, %x
  ret i8 %r
}

define i8 @sub_smin0_sub_nsw_use(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@sub_smin0_sub_nsw_use
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i8 [[X]], [[Y]]
; CHECK-NEXT:    call void @use8(i8 [[SUB]])
; CHECK-NEXT:    [[R:%.*]] = call i8 @llvm.smax.i8(i8 [[X]], i8 [[Y]])
; CHECK-NEXT:    ret i8 [[R]]
;
  %sub = sub nsw i8 %x, %y
  call void @use8(i8 %sub)
  %m = call i8 @llvm.smin.i8(i8 %sub, i8 0)
  %r = sub i8 %x, %m
  ret i8 %r
}

define <2 x i8> @sub_smin0_sub_nsw(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: define {{[^@]+}}@sub_smin0_sub_nsw
; CHECK-SAME: (<2 x i8> [[X:%.*]], <2 x i8> [[Y:%.*]]) {
; CHECK-NEXT:    [[R:%.*]] = call <2 x i8> @llvm.smax.v2i8(<2 x i8> [[X]], <2 x i8> [[Y]])
; CHECK-NEXT:    ret <2 x i8> [[R]]
;
  %sub = sub nsw <2 x i8> %x, %y
  %m = call <2 x i8> @llvm.smin.v2i8(<2 x i8> %sub, <2 x i8> zeroinitializer)
  %r = sub <2 x i8> %x, %m
  ret <2 x i8> %r
}

; negative test - must have nsw

define i8 @sub_smin0_sub(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@sub_smin0_sub
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = sub i8 [[X]], [[Y]]
; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.smin.i8(i8 [[SUB]], i8 0)
; CHECK-NEXT:    [[R:%.*]] = sub i8 [[X]], [[M]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %sub = sub i8 %x, %y
  %m = call i8 @llvm.smin.i8(i8 %sub, i8 0)
  %r = sub i8 %x, %m
  ret i8 %r
}

; negative test - wrong op

define i8 @sub_smin0_sub_nsw_commute(i8 %x, i8 %y) {
; CHECK-LABEL: define {{[^@]+}}@sub_smin0_sub_nsw_commute
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i8 [[Y]], [[X]]
; CHECK-NEXT:    [[M:%.*]] = call i8 @llvm.smin.i8(i8 [[SUB]], i8 0)
; CHECK-NEXT:    [[R:%.*]] = sub i8 [[X]], [[M]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %sub = sub nsw i8 %y, %x
  %m = call i8 @llvm.smin.i8(i8 %sub, i8 0)
  %r = sub i8 %x, %m
  ret i8 %r
}

define i8 @sub_max_min_nsw(i8 %a, i8 %b) {
; CHECK-LABEL: define {{[^@]+}}@sub_max_min_nsw
; CHECK-SAME: (i8 [[A:%.*]], i8 [[B:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i8 [[A]], [[B]]
; CHECK-NEXT:    [[AB:%.*]] = call i8 @llvm.abs.i8(i8 [[SUB]], i1 true)
; CHECK-NEXT:    ret i8 [[AB]]
;
  %min = call i8 @llvm.smin.i8(i8 %a, i8 %b)
  %max = call i8 @llvm.smax.i8(i8 %a, i8 %b)
  %ab = sub nsw i8 %max, %min
  ret i8 %ab
}

define i8 @sub_max_min_nuw(i8 %a, i8 %b) {
; CHECK-LABEL: define {{[^@]+}}@sub_max_min_nuw
; CHECK-SAME: (i8 [[A:%.*]], i8 [[B:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i8 [[A]], [[B]]
; CHECK-NEXT:    [[AB:%.*]] = call i8 @llvm.abs.i8(i8 [[SUB]], i1 true)
; CHECK-NEXT:    ret i8 [[AB]]
;
  %min = call i8 @llvm.smin.i8(i8 %a, i8 %b)
  %max = call i8 @llvm.smax.i8(i8 %a, i8 %b)
  %ab = sub nuw i8 %max, %min
  ret i8 %ab
}

define i8 @sub_max_min_nsw_commute(i8 %a, i8 %b) {
; CHECK-LABEL: define {{[^@]+}}@sub_max_min_nsw_commute
; CHECK-SAME: (i8 [[A:%.*]], i8 [[B:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i8 [[A]], [[B]]
; CHECK-NEXT:    [[AB:%.*]] = call i8 @llvm.abs.i8(i8 [[SUB]], i1 true)
; CHECK-NEXT:    ret i8 [[AB]]
;
  %min = call i8 @llvm.smin.i8(i8 %b, i8 %a)
  %max = call i8 @llvm.smax.i8(i8 %a, i8 %b)
  %ab = sub nsw i8 %max, %min
  ret i8 %ab
}

define i8 @sub_max_min_nuw_commute(i8 %a, i8 %b) {
; CHECK-LABEL: define {{[^@]+}}@sub_max_min_nuw_commute
; CHECK-SAME: (i8 [[A:%.*]], i8 [[B:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i8 [[A]], [[B]]
; CHECK-NEXT:    [[AB:%.*]] = call i8 @llvm.abs.i8(i8 [[SUB]], i1 true)
; CHECK-NEXT:    ret i8 [[AB]]
;
  %min = call i8 @llvm.smin.i8(i8 %b, i8 %a)
  %max = call i8 @llvm.smax.i8(i8 %a, i8 %b)
  %ab = sub nuw i8 %max, %min
  ret i8 %ab
}

define <2 x i8> @sub_max_min_vec_nsw(<2 x i8> %a, <2 x i8> %b) {
; CHECK-LABEL: define {{[^@]+}}@sub_max_min_vec_nsw
; CHECK-SAME: (<2 x i8> [[A:%.*]], <2 x i8> [[B:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = sub nsw <2 x i8> [[A]], [[B]]
; CHECK-NEXT:    [[AB:%.*]] = call <2 x i8> @llvm.abs.v2i8(<2 x i8> [[SUB]], i1 true)
; CHECK-NEXT:    ret <2 x i8> [[AB]]
;
  %min = call <2 x i8> @llvm.smin.v2i8(<2 x i8> %a, <2 x i8> %b)
  %max = call <2 x i8> @llvm.smax.v2i8(<2 x i8> %a, <2 x i8> %b)
  %ab = sub nsw <2 x i8> %max, %min
  ret <2 x i8> %ab
}

define <2 x i8> @sub_max_min_vec_nuw(<2 x i8> %a, <2 x i8> %b) {
; CHECK-LABEL: define {{[^@]+}}@sub_max_min_vec_nuw
; CHECK-SAME: (<2 x i8> [[A:%.*]], <2 x i8> [[B:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = sub nsw <2 x i8> [[A]], [[B]]
; CHECK-NEXT:    [[AB:%.*]] = call <2 x i8> @llvm.abs.v2i8(<2 x i8> [[SUB]], i1 true)
; CHECK-NEXT:    ret <2 x i8> [[AB]]
;
  %min = call <2 x i8> @llvm.smin.v2i8(<2 x i8> %a, <2 x i8> %b)
  %max = call <2 x i8> @llvm.smax.v2i8(<2 x i8> %a, <2 x i8> %b)
  %ab = sub nuw <2 x i8> %max, %min
  ret <2 x i8> %ab
}

define <2 x i8> @sub_max_min_vec_nsw_commute(<2 x i8> %a, <2 x i8> %b) {
; CHECK-LABEL: define {{[^@]+}}@sub_max_min_vec_nsw_commute
; CHECK-SAME: (<2 x i8> [[A:%.*]], <2 x i8> [[B:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = sub nsw <2 x i8> [[A]], [[B]]
; CHECK-NEXT:    [[AB:%.*]] = call <2 x i8> @llvm.abs.v2i8(<2 x i8> [[SUB]], i1 true)
; CHECK-NEXT:    ret <2 x i8> [[AB]]
;
  %min = call <2 x i8> @llvm.smin.v2i8(<2 x i8> %b, <2 x i8> %a)
  %max = call <2 x i8> @llvm.smax.v2i8(<2 x i8> %a, <2 x i8> %b)
  %ab = sub nsw <2 x i8> %max, %min
  ret <2 x i8> %ab
}

define <2 x i8> @sub_max_min_vec_nuw_commute(<2 x i8> %a, <2 x i8> %b) {
; CHECK-LABEL: define {{[^@]+}}@sub_max_min_vec_nuw_commute
; CHECK-SAME: (<2 x i8> [[A:%.*]], <2 x i8> [[B:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = sub nsw <2 x i8> [[A]], [[B]]
; CHECK-NEXT:    [[AB:%.*]] = call <2 x i8> @llvm.abs.v2i8(<2 x i8> [[SUB]], i1 true)
; CHECK-NEXT:    ret <2 x i8> [[AB]]
;
  %min = call <2 x i8> @llvm.smin.v2i8(<2 x i8> %b, <2 x i8> %a)
  %max = call <2 x i8> @llvm.smax.v2i8(<2 x i8> %a, <2 x i8> %b)
  %ab = sub nuw <2 x i8> %max, %min
  ret <2 x i8> %ab
}

; negative test - multiple use

define i8 @sub_max_min_multi_use(i8 %a, i8 %b) {
; CHECK-LABEL: define {{[^@]+}}@sub_max_min_multi_use
; CHECK-SAME: (i8 [[A:%.*]], i8 [[B:%.*]]) {
; CHECK-NEXT:    [[MIN:%.*]] = call i8 @llvm.smin.i8(i8 [[A]], i8 [[B]])
; CHECK-NEXT:    call void @use8(i8 [[MIN]])
; CHECK-NEXT:    [[MAX:%.*]] = call i8 @llvm.smax.i8(i8 [[A]], i8 [[B]])
; CHECK-NEXT:    call void @use8(i8 [[MAX]])
; CHECK-NEXT:    [[AB:%.*]] = sub nsw i8 [[MAX]], [[MIN]]
; CHECK-NEXT:    ret i8 [[AB]]
;
  %min = call i8 @llvm.smin.i8(i8 %a, i8 %b)
  call void @use8(i8 %min)
  %max = call i8 @llvm.smax.i8(i8 %a, i8 %b)
  call void @use8(i8 %max)
  %ab = sub nsw i8 %max, %min
  ret i8 %ab
}

define <2 x i8> @sub_max_min_vec_multi_use(<2 x i8> %a, <2 x i8> %b) {
; CHECK-LABEL: define {{[^@]+}}@sub_max_min_vec_multi_use
; CHECK-SAME: (<2 x i8> [[A:%.*]], <2 x i8> [[B:%.*]]) {
; CHECK-NEXT:    [[MIN:%.*]] = call <2 x i8> @llvm.smin.v2i8(<2 x i8> [[A]], <2 x i8> [[B]])
; CHECK-NEXT:    call void @use8v2(<2 x i8> [[MIN]])
; CHECK-NEXT:    [[MAX:%.*]] = call <2 x i8> @llvm.smax.v2i8(<2 x i8> [[A]], <2 x i8> [[B]])
; CHECK-NEXT:    call void @use8v2(<2 x i8> [[MAX]])
; CHECK-NEXT:    [[AB:%.*]] = sub nsw <2 x i8> [[MAX]], [[MIN]]
; CHECK-NEXT:    ret <2 x i8> [[AB]]
;
  %min = call <2 x i8> @llvm.smin.v2i8(<2 x i8> %a, <2 x i8> %b)
  call void @use8v2(<2 x i8> %min)
  %max = call <2 x i8> @llvm.smax.v2i8(<2 x i8> %a, <2 x i8> %b)
  call void @use8v2(<2 x i8> %max)
  %ab = sub nsw <2 x i8> %max, %min
  ret <2 x i8> %ab
}

declare void @use8(i8)
declare void @use32(i32 %u)

declare void @use8v2(i8)