llvm/test/Transforms/InstCombine/sub-minmax.ll

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

declare i5 @llvm.umin.i5(i5, i5)
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: @max_na_b_minux_na(
; CHECK-NEXT:    [[NOT:%.*]] = xor i32 [[A:%.*]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.usub.sat.i32(i32 [[NOT]], i32 [[B:%.*]])
; CHECK-NEXT:    [[TMP2:%.*]] = sub i32 0, [[TMP1]]
; CHECK-NEXT:    ret i32 [[TMP2]]
;
  %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: @na_minus_max_na_b(
; CHECK-NEXT:    [[NOT:%.*]] = xor i32 [[A:%.*]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.usub.sat.i32(i32 [[NOT]], i32 [[B:%.*]])
; CHECK-NEXT:    ret i32 [[TMP1]]
;
  %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: @sub_umin(
; CHECK-NEXT:    [[UMIN:%.*]] = call i5 @llvm.umin.i5(i5 [[A:%.*]], i5 [[B:%.*]])
; CHECK-NEXT:    [[R:%.*]] = sub i5 [[A]], [[UMIN]]
; 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: @sub_umin_commute_vec(
; CHECK-NEXT:    [[UMIN:%.*]] = call <2 x i8> @llvm.umin.v2i8(<2 x i8> [[B:%.*]], <2 x i8> [[A:%.*]])
; CHECK-NEXT:    [[R:%.*]] = sub <2 x i8> [[B]], [[UMIN]]
; 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, i5* %p) {
; CHECK-LABEL: @sub_umin_uses(
; CHECK-NEXT:    [[UMIN:%.*]] = call i5 @llvm.umin.i5(i5 [[A:%.*]], i5 [[B:%.*]])
; CHECK-NEXT:    store i5 [[UMIN]], i5* [[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, i5* %p
  %r = sub i5 %a, %umin
  ret i5 %r
}

define i5 @sub_umin_no_common_op(i5 %a, i5 %b, i5 %c) {
; CHECK-LABEL: @sub_umin_no_common_op(
; 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: @max_b_na_minus_na(
; CHECK-NEXT:    [[NOT:%.*]] = xor i32 [[A:%.*]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.usub.sat.i32(i32 [[NOT]], i32 [[B:%.*]])
; CHECK-NEXT:    [[TMP2:%.*]] = sub i32 0, [[TMP1]]
; CHECK-NEXT:    ret i32 [[TMP2]]
;
  %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: @na_minus_max_b_na(
; CHECK-NEXT:    [[NOT:%.*]] = xor i32 [[A:%.*]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.usub.sat.i32(i32 [[NOT]], i32 [[B:%.*]])
; CHECK-NEXT:    ret i32 [[TMP1]]
;
  %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: @max_na_bi_minux_na(
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.usub.sat.i32(i32 [[BI:%.*]], i32 [[A:%.*]])
; CHECK-NEXT:    [[TMP2:%.*]] = sub i32 0, [[TMP1]]
; CHECK-NEXT:    ret i32 [[TMP2]]
;
  %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: @na_minus_max_na_bi(
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.usub.sat.i32(i32 [[BI:%.*]], i32 [[A:%.*]])
; CHECK-NEXT:    ret i32 [[TMP1]]
;
  %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: @max_bi_na_minus_na(
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.usub.sat.i32(i32 [[BI:%.*]], i32 [[A:%.*]])
; CHECK-NEXT:    [[TMP2:%.*]] = sub i32 0, [[TMP1]]
; CHECK-NEXT:    ret i32 [[TMP2]]
;
  %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: @na_minus_max_bi_na(
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.usub.sat.i32(i32 [[BI:%.*]], i32 [[A:%.*]])
; CHECK-NEXT:    ret i32 [[TMP1]]
;
  %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: @max_na_bi_minux_na_use(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ugt i32 [[A:%.*]], -32
; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[A]], i32 -32
; CHECK-NEXT:    [[L1:%.*]] = xor i32 [[TMP2]], -1
; CHECK-NEXT:    [[X:%.*]] = sub i32 [[A]], [[TMP2]]
; 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: @na_minus_max_na_bi_use(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ugt i32 [[A:%.*]], -32
; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[A]], i32 -32
; CHECK-NEXT:    [[L1:%.*]] = xor i32 [[TMP2]], -1
; CHECK-NEXT:    [[X:%.*]] = sub i32 [[TMP2]], [[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: @max_bi_na_minus_na_use(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ugt i32 [[BI:%.*]], [[A:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[BI]], i32 [[A]]
; CHECK-NEXT:    [[L1:%.*]] = xor i32 [[TMP2]], -1
; CHECK-NEXT:    [[X:%.*]] = sub i32 [[A]], [[TMP2]]
; 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: @na_minus_max_bi_na_use(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ugt i32 [[BI:%.*]], [[A:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[BI]], i32 [[A]]
; CHECK-NEXT:    [[L1:%.*]] = xor i32 [[TMP2]], -1
; CHECK-NEXT:    [[X:%.*]] = sub i32 [[TMP2]], [[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: @max_na_bi_minux_na_use2(
; CHECK-NEXT:    [[NOT:%.*]] = xor i32 [[A:%.*]], -1
; CHECK-NEXT:    [[L0:%.*]] = icmp ult i32 [[NOT]], 31
; CHECK-NEXT:    [[L1:%.*]] = select i1 [[L0]], 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: @na_minus_max_na_bi_use2(
; CHECK-NEXT:    [[NOT:%.*]] = xor i32 [[A:%.*]], -1
; CHECK-NEXT:    [[L0:%.*]] = icmp ult i32 [[NOT]], 31
; CHECK-NEXT:    [[L1:%.*]] = select i1 [[L0]], 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: @max_bi_na_minus_na_use2(
; CHECK-NEXT:    [[NOT:%.*]] = xor i32 [[A:%.*]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ugt i32 [[BI:%.*]], [[A]]
; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[BI]], i32 [[A]]
; CHECK-NEXT:    [[L1:%.*]] = xor i32 [[TMP2]], -1
; CHECK-NEXT:    [[X:%.*]] = sub i32 [[A]], [[TMP2]]
; 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: @na_minus_max_bi_na_use2(
; CHECK-NEXT:    [[NOT:%.*]] = xor i32 [[A:%.*]], -1
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ugt i32 [[BI:%.*]], [[A]]
; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[BI]], i32 [[A]]
; CHECK-NEXT:    [[L1:%.*]] = xor i32 [[TMP2]], -1
; CHECK-NEXT:    [[X:%.*]] = sub i32 [[TMP2]], [[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: @umin_not_sub(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ugt i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[TMP1]], i8 [[X]], i8 [[Y]]
; CHECK-NEXT:    [[MINXY:%.*]] = xor i8 [[TMP2]], -1
; CHECK-NEXT:    [[SUBX:%.*]] = sub i8 [[TMP2]], [[X]]
; CHECK-NEXT:    [[SUBY:%.*]] = sub i8 [[TMP2]], [[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: @umin_not_sub_rev(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ugt i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[TMP1]], i8 [[X]], i8 [[Y]]
; CHECK-NEXT:    [[MINXY:%.*]] = xor i8 [[TMP2]], -1
; CHECK-NEXT:    [[SUBX:%.*]] = sub i8 [[X]], [[TMP2]]
; CHECK-NEXT:    [[SUBY:%.*]] = sub i8 [[Y]], [[TMP2]]
; 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: @umin3_not_all_ops_extra_uses_invert_subs(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ugt i8 [[X:%.*]], [[Z:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[TMP1]], i8 [[X]], i8 [[Z]]
; CHECK-NEXT:    [[TMP3:%.*]] = icmp ugt i8 [[TMP2]], [[Y:%.*]]
; CHECK-NEXT:    [[TMP4:%.*]] = select i1 [[TMP3]], i8 [[TMP2]], i8 [[Y]]
; CHECK-NEXT:    [[TMP5:%.*]] = xor i8 [[TMP4]], -1
; CHECK-NEXT:    [[XMIN:%.*]] = sub i8 [[TMP4]], [[X]]
; CHECK-NEXT:    [[YMIN:%.*]] = sub i8 [[TMP4]], [[Y]]
; CHECK-NEXT:    [[ZMIN:%.*]] = sub i8 [[TMP4]], [[Z]]
; CHECK-NEXT:    call void @use8(i8 [[TMP5]])
; 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: @umin_not_sub_intrinsic_commute0(
; 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: @umax_not_sub_intrinsic_commute1(
; 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: @smin_not_sub_intrinsic_commute2(
; 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: @smax_not_sub_intrinsic_commute3(
; 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: @umin_not_sub_intrinsic_uses(
; 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: @umax_sub_op0(
; CHECK-NEXT:    [[TMP1:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[X:%.*]], i8 [[Y:%.*]])
; CHECK-NEXT:    ret i8 [[TMP1]]
;
  %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: @umax_sub_op0_vec_commute(
; CHECK-NEXT:    [[TMP1:%.*]] = call <2 x i8> @llvm.usub.sat.v2i8(<2 x i8> [[X:%.*]], <2 x i8> [[Y:%.*]])
; CHECK-NEXT:    ret <2 x i8> [[TMP1]]
;
  %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: @umax_sub_op0_use(
; 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: @umax_sub_op1(
; 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: @umax_sub_op1_vec_commute(
; 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: @umax_sub_op1_use(
; 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
}

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