test/Transforms/InstSimplify/AndOrXor.ll

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

declare i32 @llvm.smax.i32(i32, i32)
declare <2 x i32> @llvm.umin.v2i32(<2 x i32>, <2 x i32>)

define i8 @and0(i8 %x) {
; CHECK-LABEL: @and0(
; CHECK-NEXT:    ret i8 0
;
  %r = and i8 %x, 0
  ret i8 %r
}

define <2 x i8> @and0_vec_undef_elt(<2 x i8> %x) {
; CHECK-LABEL: @and0_vec_undef_elt(
; CHECK-NEXT:    ret <2 x i8> zeroinitializer
;
  %r = and <2 x i8> %x, <i8 undef, i8 0>
  ret <2 x i8> %r
}

; add nsw (xor X, signbit), signbit --> X

define <2 x i32> @add_nsw_signbit(<2 x i32> %x) {
; CHECK-LABEL: @add_nsw_signbit(
; CHECK-NEXT:    ret <2 x i32> [[X:%.*]]
;
  %y = xor <2 x i32> %x, <i32 -2147483648, i32 -2147483648>
  %z = add nsw <2 x i32> %y, <i32 -2147483648, i32 -2147483648>
  ret <2 x i32> %z
}

; Undef elements in either constant vector are ok.

define <2 x i32> @add_nsw_signbit_undef(<2 x i32> %x) {
; CHECK-LABEL: @add_nsw_signbit_undef(
; CHECK-NEXT:    ret <2 x i32> [[X:%.*]]
;
  %y = xor <2 x i32> %x, <i32 undef, i32 -2147483648>
  %z = add nsw <2 x i32> %y, <i32 -2147483648, i32 undef>
  ret <2 x i32> %z
}

; add nuw (xor X, signbit), signbit --> X

define <2 x i5> @add_nuw_signbit(<2 x i5> %x) {
; CHECK-LABEL: @add_nuw_signbit(
; CHECK-NEXT:    ret <2 x i5> [[X:%.*]]
;
  %y = xor <2 x i5> %x, <i5 -16, i5 -16>
  %z = add nuw <2 x i5> %y, <i5 -16, i5 -16>
  ret <2 x i5> %z
}

; Undef elements in either constant vector are ok.

define <2 x i5> @add_nuw_signbit_undef(<2 x i5> %x) {
; CHECK-LABEL: @add_nuw_signbit_undef(
; CHECK-NEXT:    ret <2 x i5> [[X:%.*]]
;
  %y = xor <2 x i5> %x, <i5 -16, i5 undef>
  %z = add nuw <2 x i5> %y, <i5 undef, i5 -16>
  ret <2 x i5> %z
}

define i64 @pow2(i32 %x) {
; CHECK-LABEL: @pow2(
; CHECK-NEXT:    [[NEGX:%.*]] = sub i32 0, [[X:%.*]]
; CHECK-NEXT:    [[X2:%.*]] = and i32 [[X]], [[NEGX]]
; CHECK-NEXT:    [[E:%.*]] = zext i32 [[X2]] to i64
; CHECK-NEXT:    ret i64 [[E]]
;
  %negx = sub i32 0, %x
  %x2 = and i32 %x, %negx
  %e = zext i32 %x2 to i64
  %nege = sub i64 0, %e
  %e2 = and i64 %e, %nege
  ret i64 %e2
}

define i64 @pow2b(i32 %x) {
; CHECK-LABEL: @pow2b(
; CHECK-NEXT:    [[SH:%.*]] = shl i32 2, [[X:%.*]]
; CHECK-NEXT:    [[E:%.*]] = zext i32 [[SH]] to i64
; CHECK-NEXT:    ret i64 [[E]]
;
  %sh = shl i32 2, %x
  %e = zext i32 %sh to i64
  %nege = sub i64 0, %e
  %e2 = and i64 %e, %nege
  ret i64 %e2
}

define i32 @pow2b_max(i32 %x, i32 %y) {
; CHECK-LABEL: @pow2b_max(
; CHECK-NEXT:    [[SHX:%.*]] = shl i32 2, [[X:%.*]]
; CHECK-NEXT:    [[SHY:%.*]] = shl i32 32, [[Y:%.*]]
; CHECK-NEXT:    [[M:%.*]] = call i32 @llvm.smax.i32(i32 [[SHX]], i32 [[SHY]])
; CHECK-NEXT:    ret i32 [[M]]
;
  %shx = shl i32 2, %x
  %shy = shl i32 32, %y
  %m = call i32 @llvm.smax.i32(i32 %shx, i32 %shy)
  %neg = sub i32 0, %m
  %r = and i32 %m, %neg
  ret i32 %r
}

; Power-of-2-or-zero value has no bits in common with its decrement.

define i32 @pow2_decrement(i32 %p) {
; CHECK-LABEL: @pow2_decrement(
; CHECK-NEXT:    ret i32 0
;
  %x = shl i32 1, %p
  %a = add i32 %x, -1
  %r = and i32 %a, %x
  ret i32 %r
}

define <2 x i32> @pow2_decrement_commute_vec(<2 x i32> %p) {
; CHECK-LABEL: @pow2_decrement_commute_vec(
; CHECK-NEXT:    ret <2 x i32> zeroinitializer
;
  %x = and <2 x i32> %p, <i32 2048, i32 2048>
  %a = add <2 x i32> %x, <i32 -1, i32 -1>
  %r = and <2 x i32> %x, %a
  ret <2 x i32> %r
}

define <2 x i32> @pow2_decrement_min_vec(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @pow2_decrement_min_vec(
; CHECK-NEXT:    ret <2 x i32> zeroinitializer
;
  %p1 = and <2 x i32> %x, <i32 2048, i32 2048>
  %p2 = shl <2 x i32> <i32 1, i32 1>, %y
  %m = call <2 x i32> @llvm.umin.v2i32(<2 x i32> %p1, <2 x i32> %p2)
  %a = add <2 x i32> %m, <i32 -1, i32 -1>
  %r = and <2 x i32> %m, %a
  ret <2 x i32> %r
}

define i1 @and_of_icmps0(i32 %b) {
; CHECK-LABEL: @and_of_icmps0(
; CHECK-NEXT:    ret i1 false
;
  %1 = add i32 %b, 2
  %2 = icmp ult i32 %1, 4
  %cmp3 = icmp sgt i32 %b, 2
  %cmp = and i1 %2, %cmp3
  ret i1 %cmp
}

define <2 x i1> @and_of_icmps0_vec(<2 x i32> %b) {
; CHECK-LABEL: @and_of_icmps0_vec(
; CHECK-NEXT:    ret <2 x i1> zeroinitializer
;
  %1 = add <2 x i32> %b, <i32 2, i32 2>
  %2 = icmp ult <2 x i32> %1, <i32 4, i32 4>
  %cmp3 = icmp sgt <2 x i32> %b, <i32 2, i32 2>
  %cmp = and <2 x i1> %2, %cmp3
  ret <2 x i1> %cmp
}

define i1 @and_of_icmps1(i32 %b) {
; CHECK-LABEL: @and_of_icmps1(
; CHECK-NEXT:    ret i1 false
;
  %1 = add nsw i32 %b, 2
  %2 = icmp slt i32 %1, 4
  %cmp3 = icmp sgt i32 %b, 2
  %cmp = and i1 %2, %cmp3
  ret i1 %cmp
}

define <2 x i1> @and_of_icmps1_vec(<2 x i32> %b) {
; CHECK-LABEL: @and_of_icmps1_vec(
; CHECK-NEXT:    ret <2 x i1> zeroinitializer
;
  %1 = add nsw <2 x i32> %b, <i32 2, i32 2>
  %2 = icmp slt <2 x i32> %1, <i32 4, i32 4>
  %cmp3 = icmp sgt <2 x i32> %b, <i32 2, i32 2>
  %cmp = and <2 x i1> %2, %cmp3
  ret <2 x i1> %cmp
}

define i1 @and_of_icmps2(i32 %b) {
; CHECK-LABEL: @and_of_icmps2(
; CHECK-NEXT:    ret i1 false
;
  %1 = add i32 %b, 2
  %2 = icmp ule i32 %1, 3
  %cmp3 = icmp sgt i32 %b, 2
  %cmp = and i1 %2, %cmp3
  ret i1 %cmp
}

define <2 x i1> @and_of_icmps2_vec(<2 x i32> %b) {
; CHECK-LABEL: @and_of_icmps2_vec(
; CHECK-NEXT:    ret <2 x i1> zeroinitializer
;
  %1 = add <2 x i32> %b, <i32 2, i32 2>
  %2 = icmp ule <2 x i32> %1, <i32 3, i32 3>
  %cmp3 = icmp sgt <2 x i32> %b, <i32 2, i32 2>
  %cmp = and <2 x i1> %2, %cmp3
  ret <2 x i1> %cmp
}

define i1 @and_of_icmps3(i32 %b) {
; CHECK-LABEL: @and_of_icmps3(
; CHECK-NEXT:    ret i1 false
;
  %1 = add nsw i32 %b, 2
  %2 = icmp sle i32 %1, 3
  %cmp3 = icmp sgt i32 %b, 2
  %cmp = and i1 %2, %cmp3
  ret i1 %cmp
}

define <2 x i1> @and_of_icmps3_vec(<2 x i32> %b) {
; CHECK-LABEL: @and_of_icmps3_vec(
; CHECK-NEXT:    ret <2 x i1> zeroinitializer
;
  %1 = add nsw <2 x i32> %b, <i32 2, i32 2>
  %2 = icmp sle <2 x i32> %1, <i32 3, i32 3>
  %cmp3 = icmp sgt <2 x i32> %b, <i32 2, i32 2>
  %cmp = and <2 x i1> %2, %cmp3
  ret <2 x i1> %cmp
}

define i1 @and_of_icmps4(i32 %b) {
; CHECK-LABEL: @and_of_icmps4(
; CHECK-NEXT:    ret i1 false
;
  %1 = add nuw i32 %b, 2
  %2 = icmp ult i32 %1, 4
  %cmp3 = icmp ugt i32 %b, 2
  %cmp = and i1 %2, %cmp3
  ret i1 %cmp
}

define <2 x i1> @and_of_icmps4_vec(<2 x i32> %b) {
; CHECK-LABEL: @and_of_icmps4_vec(
; CHECK-NEXT:    ret <2 x i1> zeroinitializer
;
  %1 = add nuw <2 x i32> %b, <i32 2, i32 2>
  %2 = icmp ult <2 x i32> %1, <i32 4, i32 4>
  %cmp3 = icmp ugt <2 x i32> %b, <i32 2, i32 2>
  %cmp = and <2 x i1> %2, %cmp3
  ret <2 x i1> %cmp
}

define i1 @and_of_icmps5(i32 %b) {
; CHECK-LABEL: @and_of_icmps5(
; CHECK-NEXT:    ret i1 false
;
  %1 = add nuw i32 %b, 2
  %2 = icmp ule i32 %1, 3
  %cmp3 = icmp ugt i32 %b, 2
  %cmp = and i1 %2, %cmp3
  ret i1 %cmp
}

define <2 x i1> @and_of_icmps5_vec(<2 x i32> %b) {
; CHECK-LABEL: @and_of_icmps5_vec(
; CHECK-NEXT:    ret <2 x i1> zeroinitializer
;
  %1 = add nuw <2 x i32> %b, <i32 2, i32 2>
  %2 = icmp ule <2 x i32> %1, <i32 3, i32 3>
  %cmp3 = icmp ugt <2 x i32> %b, <i32 2, i32 2>
  %cmp = and <2 x i1> %2, %cmp3
  ret <2 x i1> %cmp
}

define i1 @or_of_icmps0(i32 %b) {
; CHECK-LABEL: @or_of_icmps0(
; CHECK-NEXT:    ret i1 true
;
  %1 = add i32 %b, 2
  %2 = icmp uge i32 %1, 4
  %cmp3 = icmp sle i32 %b, 2
  %cmp = or i1 %2, %cmp3
  ret i1 %cmp
}

define <2 x i1> @or_of_icmps0_vec(<2 x i32> %b) {
; CHECK-LABEL: @or_of_icmps0_vec(
; CHECK-NEXT:    ret <2 x i1> <i1 true, i1 true>
;
  %1 = add <2 x i32> %b, <i32 2, i32 2>
  %2 = icmp uge <2 x i32> %1, <i32 4, i32 4>
  %cmp3 = icmp sle <2 x i32> %b, <i32 2, i32 2>
  %cmp = or <2 x i1> %2, %cmp3
  ret <2 x i1> %cmp
}

define i1 @or_of_icmps1(i32 %b) {
; CHECK-LABEL: @or_of_icmps1(
; CHECK-NEXT:    ret i1 true
;
  %1 = add nsw i32 %b, 2
  %2 = icmp sge i32 %1, 4
  %cmp3 = icmp sle i32 %b, 2
  %cmp = or i1 %2, %cmp3
  ret i1 %cmp
}

define <2 x i1> @or_of_icmps1_vec(<2 x i32> %b) {
; CHECK-LABEL: @or_of_icmps1_vec(
; CHECK-NEXT:    ret <2 x i1> <i1 true, i1 true>
;
  %1 = add nsw <2 x i32> %b, <i32 2, i32 2>
  %2 = icmp sge <2 x i32> %1, <i32 4, i32 4>
  %cmp3 = icmp sle <2 x i32> %b, <i32 2, i32 2>
  %cmp = or <2 x i1> %2, %cmp3
  ret <2 x i1> %cmp
}

define i1 @or_of_icmps2(i32 %b) {
; CHECK-LABEL: @or_of_icmps2(
; CHECK-NEXT:    ret i1 true
;
  %1 = add i32 %b, 2
  %2 = icmp ugt i32 %1, 3
  %cmp3 = icmp sle i32 %b, 2
  %cmp = or i1 %2, %cmp3
  ret i1 %cmp
}

define <2 x i1> @or_of_icmps2_vec(<2 x i32> %b) {
; CHECK-LABEL: @or_of_icmps2_vec(
; CHECK-NEXT:    ret <2 x i1> <i1 true, i1 true>
;
  %1 = add <2 x i32> %b, <i32 2, i32 2>
  %2 = icmp ugt <2 x i32> %1, <i32 3, i32 3>
  %cmp3 = icmp sle <2 x i32> %b, <i32 2, i32 2>
  %cmp = or <2 x i1> %2, %cmp3
  ret <2 x i1> %cmp
}

define i1 @or_of_icmps3(i32 %b) {
; CHECK-LABEL: @or_of_icmps3(
; CHECK-NEXT:    ret i1 true
;
  %1 = add nsw i32 %b, 2
  %2 = icmp sgt i32 %1, 3
  %cmp3 = icmp sle i32 %b, 2
  %cmp = or i1 %2, %cmp3
  ret i1 %cmp
}

define <2 x i1> @or_of_icmps3_vec(<2 x i32> %b) {
; CHECK-LABEL: @or_of_icmps3_vec(
; CHECK-NEXT:    ret <2 x i1> <i1 true, i1 true>
;
  %1 = add nsw <2 x i32> %b, <i32 2, i32 2>
  %2 = icmp sgt <2 x i32> %1, <i32 3, i32 3>
  %cmp3 = icmp sle <2 x i32> %b, <i32 2, i32 2>
  %cmp = or <2 x i1> %2, %cmp3
  ret <2 x i1> %cmp
}

define i1 @or_of_icmps4(i32 %b) {
; CHECK-LABEL: @or_of_icmps4(
; CHECK-NEXT:    ret i1 true
;
  %1 = add nuw i32 %b, 2
  %2 = icmp uge i32 %1, 4
  %cmp3 = icmp ule i32 %b, 2
  %cmp = or i1 %2, %cmp3
  ret i1 %cmp
}

define <2 x i1> @or_of_icmps4_vec(<2 x i32> %b) {
; CHECK-LABEL: @or_of_icmps4_vec(
; CHECK-NEXT:    ret <2 x i1> <i1 true, i1 true>
;
  %1 = add nuw <2 x i32> %b, <i32 2, i32 2>
  %2 = icmp uge <2 x i32> %1, <i32 4, i32 4>
  %cmp3 = icmp ule <2 x i32> %b, <i32 2, i32 2>
  %cmp = or <2 x i1> %2, %cmp3
  ret <2 x i1> %cmp
}

define i1 @or_of_icmps5(i32 %b) {
; CHECK-LABEL: @or_of_icmps5(
; CHECK-NEXT:    ret i1 true
;
  %1 = add nuw i32 %b, 2
  %2 = icmp ugt i32 %1, 3
  %cmp3 = icmp ule i32 %b, 2
  %cmp = or i1 %2, %cmp3
  ret i1 %cmp
}

define <2 x i1> @or_of_icmps5_vec(<2 x i32> %b) {
; CHECK-LABEL: @or_of_icmps5_vec(
; CHECK-NEXT:    ret <2 x i1> <i1 true, i1 true>
;
  %1 = add nuw <2 x i32> %b, <i32 2, i32 2>
  %2 = icmp ugt <2 x i32> %1, <i32 3, i32 3>
  %cmp3 = icmp ule <2 x i32> %b, <i32 2, i32 2>
  %cmp = or <2 x i1> %2, %cmp3
  ret <2 x i1> %cmp
}

define i32 @neg_nuw(i32 %x) {
; CHECK-LABEL: @neg_nuw(
; CHECK-NEXT:    ret i32 0
;
  %neg = sub nuw i32 0, %x
  ret i32 %neg
}

; PR27869 - Look through casts to eliminate cmps and bitwise logic.

define i32 @and_of_zexted_icmps(i32 %i) {
; CHECK-LABEL: @and_of_zexted_icmps(
; CHECK-NEXT:    ret i32 0
;
  %cmp0 = icmp eq i32 %i, 0
  %conv0 = zext i1 %cmp0 to i32
  %cmp1 = icmp ugt i32 %i, 4
  %conv1 = zext i1 %cmp1 to i32
  %and = and i32 %conv0, %conv1
  ret i32 %and
}

; Make sure vectors work too.

define <4 x i32> @and_of_zexted_icmps_vec(<4 x i32> %i) {
; CHECK-LABEL: @and_of_zexted_icmps_vec(
; CHECK-NEXT:    ret <4 x i32> zeroinitializer
;
  %cmp0 = icmp eq <4 x i32> %i, zeroinitializer
  %conv0 = zext <4 x i1> %cmp0 to <4 x i32>
  %cmp1 = icmp slt <4 x i32> %i, zeroinitializer
  %conv1 = zext <4 x i1> %cmp1 to <4 x i32>
  %and = and <4 x i32> %conv0, %conv1
  ret <4 x i32> %and
}

; Try a different cast and weird types.

define i5 @and_of_sexted_icmps(i3 %i) {
; CHECK-LABEL: @and_of_sexted_icmps(
; CHECK-NEXT:    ret i5 0
;
  %cmp0 = icmp eq i3 %i, 0
  %conv0 = sext i1 %cmp0 to i5
  %cmp1 = icmp ugt i3 %i, 1
  %conv1 = sext i1 %cmp1 to i5
  %and = and i5 %conv0, %conv1
  ret i5 %and
}

; Try a different cast and weird vector types.

define i3 @and_of_bitcast_icmps_vec(<3 x i65> %i) {
; CHECK-LABEL: @and_of_bitcast_icmps_vec(
; CHECK-NEXT:    ret i3 0
;
  %cmp0 = icmp sgt <3 x i65> %i, zeroinitializer
  %conv0 = bitcast <3 x i1> %cmp0 to i3
  %cmp1 = icmp slt <3 x i65> %i, zeroinitializer
  %conv1 = bitcast <3 x i1> %cmp1 to i3
  %and = and i3 %conv0, %conv1
  ret i3 %and
}

; We can't do this if the casts are different.

define i16 @and_of_different_cast_icmps(i8 %i) {
; CHECK-LABEL: @and_of_different_cast_icmps(
; CHECK-NEXT:    [[CMP0:%.*]] = icmp eq i8 [[I:%.*]], 0
; CHECK-NEXT:    [[CONV0:%.*]] = zext i1 [[CMP0]] to i16
; CHECK-NEXT:    [[CMP1:%.*]] = icmp eq i8 [[I]], 1
; CHECK-NEXT:    [[CONV1:%.*]] = sext i1 [[CMP1]] to i16
; CHECK-NEXT:    [[AND:%.*]] = and i16 [[CONV0]], [[CONV1]]
; CHECK-NEXT:    ret i16 [[AND]]
;
  %cmp0 = icmp eq i8 %i, 0
  %conv0 = zext i1 %cmp0 to i16
  %cmp1 = icmp eq i8 %i, 1
  %conv1 = sext i1 %cmp1 to i16
  %and = and i16 %conv0, %conv1
  ret i16 %and
}

define <2 x i3> @and_of_different_cast_icmps_vec(<2 x i8> %i, <2 x i16> %j) {
; CHECK-LABEL: @and_of_different_cast_icmps_vec(
; CHECK-NEXT:    [[CMP0:%.*]] = icmp eq <2 x i8> [[I:%.*]], zeroinitializer
; CHECK-NEXT:    [[CONV0:%.*]] = zext <2 x i1> [[CMP0]] to <2 x i3>
; CHECK-NEXT:    [[CMP1:%.*]] = icmp ugt <2 x i16> [[J:%.*]], <i16 1, i16 1>
; CHECK-NEXT:    [[CONV1:%.*]] = zext <2 x i1> [[CMP1]] to <2 x i3>
; CHECK-NEXT:    [[AND:%.*]] = and <2 x i3> [[CONV0]], [[CONV1]]
; CHECK-NEXT:    ret <2 x i3> [[AND]]
;
  %cmp0 = icmp eq <2 x i8> %i, zeroinitializer
  %conv0 = zext <2 x i1> %cmp0 to <2 x i3>
  %cmp1 = icmp ugt <2 x i16> %j, <i16 1, i16 1>
  %conv1 = zext <2 x i1> %cmp1 to <2 x i3>
  %and = and <2 x i3> %conv0, %conv1
  ret <2 x i3> %and
}

; limit

define i32 @or_of_zexted_icmps(i32 %i) {
; CHECK-LABEL: @or_of_zexted_icmps(
; CHECK-NEXT:    ret i32 1
;
  %cmp0 = icmp ne i32 %i, 0
  %conv0 = zext i1 %cmp0 to i32
  %cmp1 = icmp uge i32 4, %i
  %conv1 = zext i1 %cmp1 to i32
  %or = or i32 %conv0, %conv1
  ret i32 %or
}

; Try a different cast and weird vector types.

define i3 @or_of_bitcast_icmps_vec(<3 x i65> %i) {
; CHECK-LABEL: @or_of_bitcast_icmps_vec(
; CHECK-NEXT:    ret i3 -1
;
  %cmp0 = icmp sge <3 x i65> %i, zeroinitializer
  %conv0 = bitcast <3 x i1> %cmp0 to i3
  %cmp1 = icmp slt <3 x i65> %i, zeroinitializer
  %conv1 = bitcast <3 x i1> %cmp1 to i3
  %or = or i3 %conv0, %conv1
  ret i3 %or
}

; We can't simplify if the casts are different.

define i16 @or_of_different_cast_icmps(i8 %i) {
; CHECK-LABEL: @or_of_different_cast_icmps(
; CHECK-NEXT:    [[CMP0:%.*]] = icmp ne i8 [[I:%.*]], 0
; CHECK-NEXT:    [[CONV0:%.*]] = zext i1 [[CMP0]] to i16
; CHECK-NEXT:    [[CMP1:%.*]] = icmp ne i8 [[I]], 1
; CHECK-NEXT:    [[CONV1:%.*]] = sext i1 [[CMP1]] to i16
; CHECK-NEXT:    [[OR:%.*]] = or i16 [[CONV0]], [[CONV1]]
; CHECK-NEXT:    ret i16 [[OR]]
;
  %cmp0 = icmp ne i8 %i, 0
  %conv0 = zext i1 %cmp0 to i16
  %cmp1 = icmp ne i8 %i, 1
  %conv1 = sext i1 %cmp1 to i16
  %or = or i16 %conv0, %conv1
  ret i16 %or
}

; (A & ~B) | (A ^ B) -> A ^ B

define i3 @or_xor_andn_commute0(i3 %a, i3 %b) {
; CHECK-LABEL: @or_xor_andn_commute0(
; CHECK-NEXT:    [[XOR:%.*]] = xor i3 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    ret i3 [[XOR]]
;
  %neg = xor i3 %b, -1
  %and = and i3 %a, %neg
  %xor = xor i3 %a, %b
  %or = or i3 %and, %xor
  ret i3 %or
}

define i32 @or_xor_andn_commute1(i32 %a, i32 %b) {
; CHECK-LABEL: @or_xor_andn_commute1(
; CHECK-NEXT:    [[XOR:%.*]] = xor i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    ret i32 [[XOR]]
;
  %neg = xor i32 %b, -1
  %and = and i32 %neg, %a
  %xor = xor i32 %a, %b
  %or = or i32 %and, %xor
  ret i32 %or
}

define <2 x i32> @or_xor_andn_commute2(<2 x i32> %a, <2 x i32> %b) {
; CHECK-LABEL: @or_xor_andn_commute2(
; CHECK-NEXT:    [[XOR:%.*]] = xor <2 x i32> [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    ret <2 x i32> [[XOR]]
;
  %xor = xor <2 x i32> %a, %b
  %neg = xor <2 x i32> %b, <i32 -1, i32 undef>
  %and = and <2 x i32> %a, %neg
  %or = or <2 x i32> %xor, %and
  ret <2 x i32> %or
}

define i32 @or_xor_andn_commute3(i32 %a, i32 %b) {
; CHECK-LABEL: @or_xor_andn_commute3(
; CHECK-NEXT:    [[XOR:%.*]] = xor i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    ret i32 [[XOR]]
;
  %xor = xor i32 %a, %b
  %neg = xor i32 %b, -1
  %and = and i32 %neg, %a
  %or = or i32 %xor, %and
  ret i32 %or
}

define i32 @or_xor_andn_commute4(i32 %a, i32 %b) {
; CHECK-LABEL: @or_xor_andn_commute4(
; CHECK-NEXT:    [[XOR:%.*]] = xor i32 [[B:%.*]], [[A:%.*]]
; CHECK-NEXT:    ret i32 [[XOR]]
;
  %neg = xor i32 %b, -1
  %and = and i32 %a, %neg
  %xor = xor i32 %b, %a
  %or = or i32 %and, %xor
  ret i32 %or
}

define i32 @or_xor_andn_commute5(i32 %a, i32 %b) {
; CHECK-LABEL: @or_xor_andn_commute5(
; CHECK-NEXT:    [[XOR:%.*]] = xor i32 [[B:%.*]], [[A:%.*]]
; CHECK-NEXT:    ret i32 [[XOR]]
;
  %neg = xor i32 %b, -1
  %and = and i32 %neg, %a
  %xor = xor i32 %b, %a
  %or = or i32 %and, %xor
  ret i32 %or
}

define i32 @or_xor_andn_commute6(i32 %a, i32 %b) {
; CHECK-LABEL: @or_xor_andn_commute6(
; CHECK-NEXT:    [[XOR:%.*]] = xor i32 [[B:%.*]], [[A:%.*]]
; CHECK-NEXT:    ret i32 [[XOR]]
;
  %xor = xor i32 %b, %a
  %neg = xor i32 %b, -1
  %and = and i32 %a, %neg
  %or = or i32 %xor, %and
  ret i32 %or
}

define i32 @or_xor_andn_commute7(i32 %a, i32 %b) {
; CHECK-LABEL: @or_xor_andn_commute7(
; CHECK-NEXT:    [[XOR:%.*]] = xor i32 [[B:%.*]], [[A:%.*]]
; CHECK-NEXT:    ret i32 [[XOR]]
;
  %xor = xor i32 %b, %a
  %neg = xor i32 %b, -1
  %and = and i32 %neg, %a
  %or = or i32 %xor, %and
  ret i32 %or
}

; (~A ^ B) | (A & B) -> ~A ^ B

define i32 @or_xorn_and_commute0(i32 %a, i32 %b) {
; CHECK-LABEL: @or_xorn_and_commute0(
; CHECK-NEXT:    [[NEGA:%.*]] = xor i32 [[A:%.*]], -1
; CHECK-NEXT:    [[XOR:%.*]] = xor i32 [[NEGA]], [[B:%.*]]
; CHECK-NEXT:    ret i32 [[XOR]]
;
  %nega = xor i32 %a, -1
  %and = and i32 %a, %b
  %xor = xor i32 %nega, %b
  %or = or i32 %xor, %and
  ret i32 %or
}

define i3 @or_xorn_and_commute1(i3 %a, i3 %b) {
; CHECK-LABEL: @or_xorn_and_commute1(
; CHECK-NEXT:    [[NEGA:%.*]] = xor i3 [[A:%.*]], -1
; CHECK-NEXT:    [[XOR:%.*]] = xor i3 [[B:%.*]], [[NEGA]]
; CHECK-NEXT:    ret i3 [[XOR]]
;
  %nega = xor i3 %a, -1
  %and = and i3 %a, %b
  %xor = xor i3 %b, %nega
  %or = or i3 %xor, %and
  ret i3 %or
}

define <2 x i32> @or_xorn_and_commute2(<2 x i32> %a, <2 x i32> %b) {
; CHECK-LABEL: @or_xorn_and_commute2(
; CHECK-NEXT:    [[NEGA:%.*]] = xor <2 x i32> [[A:%.*]], <i32 -1, i32 -1>
; CHECK-NEXT:    [[XOR:%.*]] = xor <2 x i32> [[B:%.*]], [[NEGA]]
; CHECK-NEXT:    ret <2 x i32> [[XOR]]
;
  %nega = xor <2 x i32> %a, <i32 -1, i32 -1>
  %and = and <2 x i32> %b, %a
  %xor = xor <2 x i32> %b, %nega
  %or = or <2 x i32> %xor, %and
  ret <2 x i32> %or
}

; This is not safe to fold because the extra logic ops limit the undef-ness of the result.

define <2 x i32> @or_xorn_and_commute2_undef(<2 x i32> %a, <2 x i32> %b) {
; CHECK-LABEL: @or_xorn_and_commute2_undef(
; CHECK-NEXT:    [[NEGA:%.*]] = xor <2 x i32> [[A:%.*]], <i32 undef, i32 -1>
; CHECK-NEXT:    [[AND:%.*]] = and <2 x i32> [[B:%.*]], [[A]]
; CHECK-NEXT:    [[XOR:%.*]] = xor <2 x i32> [[B]], [[NEGA]]
; CHECK-NEXT:    [[OR:%.*]] = or <2 x i32> [[XOR]], [[AND]]
; CHECK-NEXT:    ret <2 x i32> [[OR]]
;
  %nega = xor <2 x i32> %a, <i32 undef, i32 -1>
  %and = and <2 x i32> %b, %a
  %xor = xor <2 x i32> %b, %nega
  %or = or <2 x i32> %xor, %and
  ret <2 x i32> %or
}

; TODO: Unlike the above test, this is safe to fold.

define <2 x i32> @or_xorn_and_commute2_poison(<2 x i32> %a, <2 x i32> %b) {
; CHECK-LABEL: @or_xorn_and_commute2_poison(
; CHECK-NEXT:    [[NEGA:%.*]] = xor <2 x i32> [[A:%.*]], <i32 poison, i32 -1>
; CHECK-NEXT:    [[AND:%.*]] = and <2 x i32> [[B:%.*]], [[A]]
; CHECK-NEXT:    [[XOR:%.*]] = xor <2 x i32> [[B]], [[NEGA]]
; CHECK-NEXT:    [[OR:%.*]] = or <2 x i32> [[XOR]], [[AND]]
; CHECK-NEXT:    ret <2 x i32> [[OR]]
;
  %nega = xor <2 x i32> %a, <i32 poison, i32 -1>
  %and = and <2 x i32> %b, %a
  %xor = xor <2 x i32> %b, %nega
  %or = or <2 x i32> %xor, %and
  ret <2 x i32> %or
}

define i32 @or_xorn_and_commute3(i32 %a, i32 %b) {
; CHECK-LABEL: @or_xorn_and_commute3(
; CHECK-NEXT:    [[NEGA:%.*]] = xor i32 [[A:%.*]], -1
; CHECK-NEXT:    [[XOR:%.*]] = xor i32 [[NEGA]], [[B:%.*]]
; CHECK-NEXT:    ret i32 [[XOR]]
;
  %nega = xor i32 %a, -1
  %and = and i32 %b, %a
  %xor = xor i32 %nega, %b
  %or = or i32 %xor, %and
  ret i32 %or
}

define i32 @or_xorn_and_commute4(i32 %a, i32 %b) {
; CHECK-LABEL: @or_xorn_and_commute4(
; CHECK-NEXT:    [[NEGA:%.*]] = xor i32 [[A:%.*]], -1
; CHECK-NEXT:    [[XOR:%.*]] = xor i32 [[NEGA]], [[B:%.*]]
; CHECK-NEXT:    ret i32 [[XOR]]
;
  %nega = xor i32 %a, -1
  %and = and i32 %a, %b
  %xor = xor i32 %nega, %b
  %or = or i32 %and, %xor
  ret i32 %or
}

define i32 @or_xorn_and_commute5(i32 %a, i32 %b) {
; CHECK-LABEL: @or_xorn_and_commute5(
; CHECK-NEXT:    [[NEGA:%.*]] = xor i32 [[A:%.*]], -1
; CHECK-NEXT:    [[XOR:%.*]] = xor i32 [[B:%.*]], [[NEGA]]
; CHECK-NEXT:    ret i32 [[XOR]]
;
  %nega = xor i32 %a, -1
  %and = and i32 %a, %b
  %xor = xor i32 %b, %nega
  %or = or i32 %and, %xor
  ret i32 %or
}

define i32 @or_xorn_and_commute6(i32 %a, i32 %b) {
; CHECK-LABEL: @or_xorn_and_commute6(
; CHECK-NEXT:    [[NEGA:%.*]] = xor i32 [[A:%.*]], -1
; CHECK-NEXT:    [[XOR:%.*]] = xor i32 [[B:%.*]], [[NEGA]]
; CHECK-NEXT:    ret i32 [[XOR]]
;
  %nega = xor i32 %a, -1
  %and = and i32 %b, %a
  %xor = xor i32 %b, %nega
  %or = or i32 %and, %xor
  ret i32 %or
}

define i32 @or_xorn_and_commute7(i32 %a, i32 %b) {
; CHECK-LABEL: @or_xorn_and_commute7(
; CHECK-NEXT:    [[NEGA:%.*]] = xor i32 [[A:%.*]], -1
; CHECK-NEXT:    [[XOR:%.*]] = xor i32 [[NEGA]], [[B:%.*]]
; CHECK-NEXT:    ret i32 [[XOR]]
;
  %nega = xor i32 %a, -1
  %and = and i32 %b, %a
  %xor = xor i32 %nega, %b
  %or = or i32 %and, %xor
  ret i32 %or
}

define i8 @lshr_perfect_mask(i8 %x) {
; CHECK-LABEL: @lshr_perfect_mask(
; CHECK-NEXT:    [[SH:%.*]] = lshr i8 [[X:%.*]], 5
; CHECK-NEXT:    ret i8 [[SH]]
;
  %sh = lshr i8 %x, 5
  %mask = and i8 %sh, 7  ; 0x07
  ret i8 %mask
}

define <2 x i8> @lshr_oversized_mask_splat(<2 x i8> %x) {
; CHECK-LABEL: @lshr_oversized_mask_splat(
; CHECK-NEXT:    [[SH:%.*]] = lshr <2 x i8> [[X:%.*]], <i8 5, i8 5>
; CHECK-NEXT:    ret <2 x i8> [[SH]]
;
  %sh = lshr <2 x i8> %x, <i8 5, i8 5>
  %mask = and <2 x i8> %sh, <i8 135, i8 135>  ; 0x87
  ret <2 x i8> %mask
}

define i8 @lshr_undersized_mask(i8 %x) {
; CHECK-LABEL: @lshr_undersized_mask(
; CHECK-NEXT:    [[SH:%.*]] = lshr i8 [[X:%.*]], 5
; CHECK-NEXT:    [[MASK:%.*]] = and i8 [[SH]], -2
; CHECK-NEXT:    ret i8 [[MASK]]
;
  %sh = lshr i8 %x, 5
  %mask = and i8 %sh, -2  ; 0xFE
  ret i8 %mask
}

define <2 x i8> @shl_perfect_mask_splat(<2 x i8> %x) {
; CHECK-LABEL: @shl_perfect_mask_splat(
; CHECK-NEXT:    [[SH:%.*]] = shl <2 x i8> [[X:%.*]], <i8 6, i8 6>
; CHECK-NEXT:    ret <2 x i8> [[SH]]
;
  %sh = shl <2 x i8> %x, <i8 6, i8 6>
  %mask = and <2 x i8> %sh, <i8 192, i8 192>  ; 0xC0
  ret <2 x i8> %mask
}

define i8 @shl_oversized_mask(i8 %x) {
; CHECK-LABEL: @shl_oversized_mask(
; CHECK-NEXT:    [[SH:%.*]] = shl i8 [[X:%.*]], 6
; CHECK-NEXT:    ret i8 [[SH]]
;
  %sh = shl i8 %x, 6
  %mask = and i8 %sh, 195  ; 0xC3
  ret i8 %mask
}

define <2 x i8> @shl_undersized_mask_splat(<2 x i8> %x) {
; CHECK-LABEL: @shl_undersized_mask_splat(
; CHECK-NEXT:    [[SH:%.*]] = shl <2 x i8> [[X:%.*]], <i8 6, i8 6>
; CHECK-NEXT:    [[MASK:%.*]] = and <2 x i8> [[SH]], <i8 -120, i8 -120>
; CHECK-NEXT:    ret <2 x i8> [[MASK]]
;
  %sh = shl <2 x i8> %x, <i8 6, i8 6>
  %mask = and <2 x i8> %sh, <i8 136, i8 136>  ; 0x88
  ret <2 x i8> %mask
}

define i32 @reversed_not(i32 %a) {
; CHECK-LABEL: @reversed_not(
; CHECK-NEXT:    ret i32 -1
;
  %nega = xor i32 -1, %a
  %or = or i32 %a, %nega
  ret i32 %or
}

define i64 @shl_or_and1(i32 %a, i1 %b) {
; CHECK-LABEL: @shl_or_and1(
; CHECK-NEXT:    [[T2:%.*]] = zext i1 [[B:%.*]] to i64
; CHECK-NEXT:    ret i64 [[T2]]
;
  %t1 = zext i32 %a to i64
  %t2 = zext i1 %b to i64
  %t3 = shl nuw i64 %t1, 32
  %t4 = or i64 %t2, %t3
  %t5 = and i64 %t4, 1
  ret i64 %t5
}

define i64 @shl_or_and2(i32 %a, i1 %b) {
; CHECK-LABEL: @shl_or_and2(
; CHECK-NEXT:    [[T1:%.*]] = zext i1 [[B:%.*]] to i64
; CHECK-NEXT:    [[T3:%.*]] = shl nuw i64 [[T1]], 32
; CHECK-NEXT:    ret i64 [[T3]]
;
  %t1 = zext i1 %b to i64
  %t2 = zext i32 %a to i64
  %t3 = shl nuw i64 %t1, 32
  %t4 = or i64 %t2, %t3
  %t5 = and i64 %t4, 4294967296
  ret i64 %t5
}

; concatenate two 32-bit integers and extract lower 32-bit
define i64 @shl_or_and3(i32 %a, i32 %b) {
; CHECK-LABEL: @shl_or_and3(
; CHECK-NEXT:    [[T2:%.*]] = zext i32 [[B:%.*]] to i64
; CHECK-NEXT:    ret i64 [[T2]]
;
  %t1 = zext i32 %a to i64
  %t2 = zext i32 %b to i64
  %t3 = shl nuw i64 %t1, 32
  %t4 = or i64 %t2, %t3
  %t5 = and i64 %t4, 4294967295
  ret i64 %t5
}

; concatenate two 16-bit integers and extract higher 16-bit
define i32 @shl_or_and4(i16 %a, i16 %b) {
; CHECK-LABEL: @shl_or_and4(
; CHECK-NEXT:    [[T1:%.*]] = zext i16 [[A:%.*]] to i32
; CHECK-NEXT:    [[T3:%.*]] = shl nuw i32 [[T1]], 16
; CHECK-NEXT:    ret i32 [[T3]]
;
  %t1 = zext i16 %a to i32
  %t2 = zext i16 %b to i32
  %t3 = shl nuw i32 %t1, 16
  %t4 = or i32 %t2, %t3
  %t5 = and i32 %t4, 4294901760 ; mask with 0xFFFF0000
  ret i32 %t5
}

define i128 @shl_or_and5(i64 %a, i1 %b) {
; CHECK-LABEL: @shl_or_and5(
; CHECK-NEXT:    [[T2:%.*]] = zext i1 [[B:%.*]] to i128
; CHECK-NEXT:    ret i128 [[T2]]
;
  %t1 = zext i64 %a to i128
  %t2 = zext i1 %b to i128
  %t3 = shl nuw i128 %t1, 64
  %t4 = or i128 %t2, %t3
  %t5 = and i128 %t4, 1
  ret i128 %t5
}

; A variation of above test cases; it fails due to the mask value
define i32 @shl_or_and6(i16 %a, i16 %b) {
; CHECK-LABEL: @shl_or_and6(
; CHECK-NEXT:    [[T1:%.*]] = zext i16 [[A:%.*]] to i32
; CHECK-NEXT:    [[T2:%.*]] = zext i16 [[B:%.*]] to i32
; CHECK-NEXT:    [[T3:%.*]] = shl nuw i32 [[T1]], 16
; CHECK-NEXT:    [[T4:%.*]] = or i32 [[T2]], [[T3]]
; CHECK-NEXT:    [[T5:%.*]] = and i32 [[T4]], -65535
; CHECK-NEXT:    ret i32 [[T5]]
;
  %t1 = zext i16 %a to i32
  %t2 = zext i16 %b to i32
  %t3 = shl nuw i32 %t1, 16
  %t4 = or i32 %t2, %t3
  %t5 = and i32 %t4, 4294901761 ; mask with 0xFFFF0001
  ret i32 %t5
}

; A variation of above test cases; it fails due to the mask value
define i32 @shl_or_and7(i16 %a, i16 %b) {
; CHECK-LABEL: @shl_or_and7(
; CHECK-NEXT:    [[T1:%.*]] = zext i16 [[A:%.*]] to i32
; CHECK-NEXT:    [[T2:%.*]] = zext i16 [[B:%.*]] to i32
; CHECK-NEXT:    [[T3:%.*]] = shl nuw i32 [[T1]], 16
; CHECK-NEXT:    [[T4:%.*]] = or i32 [[T2]], [[T3]]
; CHECK-NEXT:    [[T5:%.*]] = and i32 [[T4]], -131072
; CHECK-NEXT:    ret i32 [[T5]]
;
  %t1 = zext i16 %a to i32
  %t2 = zext i16 %b to i32
  %t3 = shl nuw i32 %t1, 16
  %t4 = or i32 %t2, %t3
  %t5 = and i32 %t4, 4294836224 ; mask with 0xFFFE0000
  ret i32 %t5
}

; A variation of above test cases; it fails due to the mask value
define i32 @shl_or_and8(i16 %a, i16 %b) {
; CHECK-LABEL: @shl_or_and8(
; CHECK-NEXT:    [[T1:%.*]] = zext i16 [[A:%.*]] to i32
; CHECK-NEXT:    [[T2:%.*]] = zext i16 [[B:%.*]] to i32
; CHECK-NEXT:    [[T3:%.*]] = shl nuw i32 [[T1]], 16
; CHECK-NEXT:    [[T4:%.*]] = or i32 [[T2]], [[T3]]
; CHECK-NEXT:    [[T5:%.*]] = and i32 [[T4]], 131071
; CHECK-NEXT:    ret i32 [[T5]]
;
  %t1 = zext i16 %a to i32
  %t2 = zext i16 %b to i32
  %t3 = shl nuw i32 %t1, 16
  %t4 = or i32 %t2, %t3
  %t5 = and i32 %t4, 131071 ; mask with 0x1FFFF
  ret i32 %t5
}

define <2 x i64> @shl_or_and1v(<2 x i32> %a, <2 x i1> %b) {
; CHECK-LABEL: @shl_or_and1v(
; CHECK-NEXT:    [[T2:%.*]] = zext <2 x i1> [[B:%.*]] to <2 x i64>
; CHECK-NEXT:    ret <2 x i64> [[T2]]
;
  %t1 = zext <2 x i32> %a to <2 x i64>
  %t2 = zext <2 x i1> %b to <2 x i64>
  %t3 = shl nuw <2 x i64> %t1, <i64 32, i64 32>
  %t4 = or <2 x i64> %t3, %t2
  %t5 = and <2 x i64> %t4, <i64 1, i64 1>
  ret <2 x i64> %t5
}

define <2 x i64> @shl_or_and2v(<2 x i32> %a, <2 x i1> %b) {
; CHECK-LABEL: @shl_or_and2v(
; CHECK-NEXT:    [[T1:%.*]] = zext <2 x i1> [[B:%.*]] to <2 x i64>
; CHECK-NEXT:    [[T3:%.*]] = shl nuw <2 x i64> [[T1]], <i64 32, i64 32>
; CHECK-NEXT:    ret <2 x i64> [[T3]]
;
  %t1 = zext <2 x i1> %b to <2 x i64>
  %t2 = zext <2 x i32> %a to <2 x i64>
  %t3 = shl nuw <2 x i64> %t1, <i64 32, i64 32>
  %t4 = or <2 x i64> %t2, %t3
  %t5 = and <2 x i64> %t4, <i64 4294967296, i64 4294967296>
  ret <2 x i64> %t5
}

; A variation of above test case, but fails due to the mask value
define <2 x i32> @shl_or_and3v(<2 x i16> %a, <2 x i16> %b) {
; CHECK-LABEL: @shl_or_and3v(
; CHECK-NEXT:    [[T1:%.*]] = zext <2 x i16> [[A:%.*]] to <2 x i32>
; CHECK-NEXT:    [[T2:%.*]] = zext <2 x i16> [[B:%.*]] to <2 x i32>
; CHECK-NEXT:    [[T3:%.*]] = shl nuw <2 x i32> [[T1]], <i32 16, i32 16>
; CHECK-NEXT:    [[T4:%.*]] = or <2 x i32> [[T2]], [[T3]]
; CHECK-NEXT:    [[T5:%.*]] = and <2 x i32> [[T4]], <i32 -65535, i32 -65535>
; CHECK-NEXT:    ret <2 x i32> [[T5]]
;
  %t1 = zext <2 x i16> %a to <2 x i32>
  %t2 = zext <2 x i16> %b to <2 x i32>
  %t3 = shl nuw <2 x i32> %t1, <i32 16, i32 16>
  %t4 = or <2 x i32> %t2, %t3
  %t5 = and <2 x i32> %t4, <i32 4294901761, i32 4294901761> ; mask with 0xFFFF0001
  ret <2 x i32> %t5
}

define i8 @and_add_sub(i8 %x) {
; CHECK-LABEL: @and_add_sub(
; CHECK-NEXT:    ret i8 0
;
  %a = add i8 %x, -1
  %s = sub i8 0, %x
  %r = and i8 %a, %s
  ret i8 %r
}

define <2 x i8> @and_sub_add(<2 x i8> %x) {
; CHECK-LABEL: @and_sub_add(
; CHECK-NEXT:    ret <2 x i8> zeroinitializer
;
  %a = add <2 x i8> %x, <i8 -4, i8 -4>
  %s = sub <2 x i8> <i8 3, i8 3>, %x
  %r = and <2 x i8> %s, %a
  ret <2 x i8> %r
}

define i89 @or_add_sub(i89 %x) {
; CHECK-LABEL: @or_add_sub(
; CHECK-NEXT:    ret i89 -1
;
  %a = add i89 %x, 5
  %s = sub i89 -6, %x
  %r = or i89 %a, %s
  ret i89 %r
}

define <3 x i8> @or_sub_add(<3 x i8> %x) {
; CHECK-LABEL: @or_sub_add(
; CHECK-NEXT:    ret <3 x i8> <i8 -1, i8 -1, i8 -1>
;
  %a = add <3 x i8> %x, <i8 42, i8 -12, i8 0>
  %s = sub <3 x i8> <i8 -43, i8 11, i8 -1>, %x
  %r = or <3 x i8> %s, %a
  ret <3 x i8> %r
}


define <2 x i17> @xor_add_sub(<2 x i17> %x) {
; CHECK-LABEL: @xor_add_sub(
; CHECK-NEXT:    ret <2 x i17> <i17 -1, i17 -1>
;
  %a = add <2 x i17> %x, <i17 3000, i17 23>
  %s = sub <2 x i17> <i17 -3001, i17 -24>, %x
  %r = xor <2 x i17> %a, %s
  ret <2 x i17> %r
}

define i8 @xor_sub_add(i8 %x) {
; CHECK-LABEL: @xor_sub_add(
; CHECK-NEXT:    ret i8 -1
;
  %a = add i8 %x, 33
  %s = sub i8 -34, %x
  %r = xor i8 %s, %a
  ret i8 %r
}

; Negative test

define i8 @and_add_sub_wrong_const(i8 %x) {
; CHECK-LABEL: @and_add_sub_wrong_const(
; CHECK-NEXT:    [[A:%.*]] = add i8 [[X:%.*]], 6
; CHECK-NEXT:    [[S:%.*]] = sub i8 -6, [[X]]
; CHECK-NEXT:    [[R:%.*]] = and i8 [[A]], [[S]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %a = add i8 %x, 6
  %s = sub i8 -6, %x
  %r = and i8 %a, %s
  ret i8 %r
}

; Negative test

define i8 @or_add_sub_wrong_var(i8 %x, i8 %y) {
; CHECK-LABEL: @or_add_sub_wrong_var(
; CHECK-NEXT:    [[A:%.*]] = add i8 [[X:%.*]], 5
; CHECK-NEXT:    [[S:%.*]] = sub i8 -6, [[Y:%.*]]
; CHECK-NEXT:    [[R:%.*]] = or i8 [[A]], [[S]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %a = add i8 %x, 5
  %s = sub i8 -6, %y
  %r = or i8 %a, %s
  ret i8 %r
}

; Negative test

define i8 @xor_add_sub_wrong_op(i8 %x) {
; CHECK-LABEL: @xor_add_sub_wrong_op(
; CHECK-NEXT:    [[A:%.*]] = add i8 [[X:%.*]], 5
; CHECK-NEXT:    [[S:%.*]] = sub i8 [[X]], -6
; CHECK-NEXT:    [[R:%.*]] = xor i8 [[A]], [[S]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %a = add i8 %x, 5
  %s = sub i8 %x, -6
  %r = xor i8 %a, %s
  ret i8 %r
}

; `and` isn't needed if it doesn't actually change any bits.
define i8 @noop_and_t0(i8 %x) {
; CHECK-LABEL: @noop_and_t0(
; CHECK-NEXT:    [[A:%.*]] = shl i8 [[X:%.*]], 3
; CHECK-NEXT:    [[B:%.*]] = lshr i8 [[A]], 2
; CHECK-NEXT:    [[R:%.*]] = and i8 [[B]], 62
; CHECK-NEXT:    ret i8 [[R]]
;
  %a = shl i8 %x, 3
  %b = lshr i8 %a, 2
  %r = and i8 %b, 62
  ret i8 %r
}
define i8 @noop_and_t1(i8 %x) {
; CHECK-LABEL: @noop_and_t1(
; CHECK-NEXT:    [[A:%.*]] = shl i8 [[X:%.*]], 3
; CHECK-NEXT:    [[B:%.*]] = lshr i8 [[A]], 2
; CHECK-NEXT:    [[R:%.*]] = and i8 [[B]], 126
; CHECK-NEXT:    ret i8 [[R]]
;
  %a = shl i8 %x, 3
  %b = lshr i8 %a, 2
  %r = and i8 %b, 126
  ret i8 %r
}

; hidden simplifydemandedbits constant.
define i8 @noop_and_t2(i8 %x) {
; CHECK-LABEL: @noop_and_t2(
; CHECK-NEXT:    [[A:%.*]] = and i8 [[X:%.*]], 2
; CHECK-NEXT:    [[B:%.*]] = or i8 [[A]], 127
; CHECK-NEXT:    [[C:%.*]] = and i8 [[B]], 62
; CHECK-NEXT:    ret i8 [[C]]
;
  %a = and i8 %x, 2
  %b = or i8 %a, 127
  %c = and i8 %b, 62
  ret i8 %c
}