Codebase Browser
llvm
Go to App

llvm/llvm/test/Transforms/InstCombine/binop-and-shifts.ll 

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

define i8 @shl_and_and(i8 %x, i8 %y) {
; CHECK-LABEL: @shl_and_and(
; CHECK-NEXT:    [[TMP1:%.*]] = and i8 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = shl i8 [[TMP1]], 4
; CHECK-NEXT:    [[BW1:%.*]] = and i8 [[TMP2]], 80
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = shl i8 %x, 4
  %shift2 = shl i8 %y, 4
  %bw2 = and i8 %shift2, 88
  %bw1 = and i8 %shift1, %bw2
  ret i8 %bw1
}

define i8 @shl_and_and_fail(i8 %x, i8 %y) {
; CHECK-LABEL: @shl_and_and_fail(
; CHECK-NEXT:    [[SHIFT1:%.*]] = shl i8 [[X:%.*]], 4
; CHECK-NEXT:    [[SHIFT2:%.*]] = shl i8 [[Y:%.*]], 5
; CHECK-NEXT:    [[BW2:%.*]] = and i8 [[SHIFT2]], 64
; CHECK-NEXT:    [[BW1:%.*]] = and i8 [[SHIFT1]], [[BW2]]
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = shl i8 %x, 4
  %shift2 = shl i8 %y, 5
  %bw2 = and i8 %shift2, 88
  %bw1 = and i8 %shift1, %bw2
  ret i8 %bw1
}

define i8 @shl_add_add(i8 %x, i8 %y) {
; CHECK-LABEL: @shl_add_add(
; CHECK-NEXT:    [[TMP1:%.*]] = add i8 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = shl i8 [[TMP1]], 2
; CHECK-NEXT:    [[BW1:%.*]] = add i8 [[TMP2]], 48
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = shl i8 %x, 2
  %shift2 = shl i8 %y, 2
  %bw2 = add i8 %shift2, 48
  %bw1 = add i8 %shift1, %bw2
  ret i8 %bw1
}

define i8 @shl_add_add_fail(i8 %x, i8 %y) {
; CHECK-LABEL: @shl_add_add_fail(
; CHECK-NEXT:    [[SHIFT1:%.*]] = lshr i8 [[X:%.*]], 2
; CHECK-NEXT:    [[SHIFT2:%.*]] = lshr i8 [[Y:%.*]], 2
; CHECK-NEXT:    [[BW2:%.*]] = add nuw nsw i8 [[SHIFT2]], 48
; CHECK-NEXT:    [[BW1:%.*]] = add nuw i8 [[SHIFT1]], [[BW2]]
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = lshr i8 %x, 2
  %shift2 = lshr i8 %y, 2
  %bw2 = add i8 %shift2, 48
  %bw1 = add i8 %shift1, %bw2
  ret i8 %bw1
}

define i8 @shl_and_and_fail2(i8 %x, i8 %y) {
; CHECK-LABEL: @shl_and_and_fail2(
; CHECK-NEXT:    [[SHIFT1:%.*]] = shl i8 4, [[X:%.*]]
; CHECK-NEXT:    [[SHIFT2:%.*]] = shl i8 4, [[Y:%.*]]
; CHECK-NEXT:    [[BW2:%.*]] = and i8 [[SHIFT2]], 88
; CHECK-NEXT:    [[BW1:%.*]] = and i8 [[SHIFT1]], [[BW2]]
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = shl i8 4, %x
  %shift2 = shl i8 4, %y
  %bw2 = and i8 %shift2, 88
  %bw1 = and i8 %shift1, %bw2
  ret i8 %bw1
}

define <2 x i8> @lshr_and_or(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @lshr_and_or(
; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i8> [[X:%.*]], <i8 -64, i8 96>
; CHECK-NEXT:    [[TMP2:%.*]] = or <2 x i8> [[Y:%.*]], [[TMP1]]
; CHECK-NEXT:    [[BW1:%.*]] = lshr <2 x i8> [[TMP2]], <i8 4, i8 5>
; CHECK-NEXT:    ret <2 x i8> [[BW1]]
;
  %shift1 = lshr <2 x i8> %x, <i8 4, i8 5>
  %shift2 = lshr <2 x i8> %y, <i8 4, i8 5>
  %bw2 = and <2 x i8> %shift1, <i8 44, i8 99>
  %bw1 = or <2 x i8> %shift2, %bw2
  ret <2 x i8> %bw1
}

define <2 x i8> @lshr_and_or_fail(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @lshr_and_or_fail(
; CHECK-NEXT:    [[SHIFT1:%.*]] = lshr <2 x i8> [[X:%.*]], <i8 4, i8 5>
; CHECK-NEXT:    [[SHIFT2:%.*]] = lshr <2 x i8> [[Y:%.*]], <i8 5, i8 4>
; CHECK-NEXT:    [[BW2:%.*]] = and <2 x i8> [[SHIFT2]], <i8 44, i8 99>
; CHECK-NEXT:    [[BW1:%.*]] = or <2 x i8> [[SHIFT1]], [[BW2]]
; CHECK-NEXT:    ret <2 x i8> [[BW1]]
;
  %shift1 = lshr <2 x i8> %x, <i8 4, i8 5>
  %shift2 = lshr <2 x i8> %y, <i8 5, i8 4>
  %bw2 = and <2 x i8> %shift2, <i8 44, i8 99>
  %bw1 = or <2 x i8> %shift1, %bw2
  ret <2 x i8> %bw1
}

define i8 @shl_and_xor(i8 %x, i8 %y) {
; CHECK-LABEL: @shl_and_xor(
; CHECK-NEXT:    [[TMP1:%.*]] = and i8 [[X:%.*]], 10
; CHECK-NEXT:    [[TMP2:%.*]] = xor i8 [[Y:%.*]], [[TMP1]]
; CHECK-NEXT:    [[BW1:%.*]] = shl i8 [[TMP2]], 1
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = shl i8 %x, 1
  %shift2 = shl i8 %y, 1
  %bw2 = and i8 %shift1, 20
  %bw1 = xor i8 %shift2, %bw2
  ret i8 %bw1
}

define i8 @shl_and_add(i8 %x, i8 %y) {
; CHECK-LABEL: @shl_and_add(
; CHECK-NEXT:    [[TMP1:%.*]] = and i8 [[Y:%.*]], 59
; CHECK-NEXT:    [[TMP2:%.*]] = add i8 [[X:%.*]], [[TMP1]]
; CHECK-NEXT:    [[BW1:%.*]] = shl i8 [[TMP2]], 1
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = shl i8 %x, 1
  %shift2 = shl i8 %y, 1
  %bw2 = and i8 %shift2, 119
  %bw1 = add i8 %shift1, %bw2
  ret i8 %bw1
}

define i8 @shl_xor_add_fail(i8 %x, i8 %y) {
; CHECK-LABEL: @shl_xor_add_fail(
; CHECK-NEXT:    [[SHIFT1:%.*]] = shl i8 [[X:%.*]], 1
; CHECK-NEXT:    [[SHIFT2:%.*]] = shl i8 [[Y:%.*]], 1
; CHECK-NEXT:    [[BW2:%.*]] = xor i8 [[SHIFT2]], 119
; CHECK-NEXT:    [[BW1:%.*]] = add i8 [[SHIFT1]], [[BW2]]
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = shl i8 %x, 1
  %shift2 = shl i8 %y, 1
  %bw2 = xor i8 %shift2, 119
  %bw1 = add i8 %shift1, %bw2
  ret i8 %bw1
}

define i8 @lshr_or_and(i8 %x, i8 %y) {
; CHECK-LABEL: @lshr_or_and(
; CHECK-NEXT:    [[TMP1:%.*]] = or i8 [[X:%.*]], -64
; CHECK-NEXT:    [[TMP2:%.*]] = and i8 [[Y:%.*]], [[TMP1]]
; CHECK-NEXT:    [[BW1:%.*]] = lshr i8 [[TMP2]], 5
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = lshr i8 %x, 5
  %shift2 = lshr i8 %y, 5
  %bw2 = or i8 %shift1, 198
  %bw1 = and i8 %bw2, %shift2
  ret i8 %bw1
}

define i8 @lshr_or_or_fail(i8 %x, i8 %y) {
; CHECK-LABEL: @lshr_or_or_fail(
; CHECK-NEXT:    [[TMP1:%.*]] = or i8 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = lshr i8 [[TMP1]], 5
; CHECK-NEXT:    [[BW1:%.*]] = or i8 [[TMP2]], -58
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = lshr i8 %x, 5
  %shift2 = lshr i8 %y, 5
  %bw2 = or i8 %shift2, 198
  %bw1 = or i8 %shift1, %bw2
  ret i8 %bw1
}

define <2 x i8> @shl_xor_and(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @shl_xor_and(
; CHECK-NEXT:    [[TMP1:%.*]] = xor <2 x i8> [[Y:%.*]], <i8 11, i8 poison>
; CHECK-NEXT:    [[TMP2:%.*]] = and <2 x i8> [[X:%.*]], [[TMP1]]
; CHECK-NEXT:    [[BW1:%.*]] = shl <2 x i8> [[TMP2]], <i8 2, i8 poison>
; CHECK-NEXT:    ret <2 x i8> [[BW1]]
;
  %shift1 = shl <2 x i8> %x, <i8 2, i8 poison>
  %shift2 = shl <2 x i8> %y, <i8 2, i8 poison>
  %bw2 = xor <2 x i8> %shift2, <i8 44, i8 poison>
  %bw1 = and <2 x i8> %bw2, %shift1
  ret <2 x i8> %bw1
}

define <2 x i8> @shl_xor_and_fail(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @shl_xor_and_fail(
; CHECK-NEXT:    [[SHIFT1:%.*]] = shl <2 x i8> [[X:%.*]], <i8 2, i8 poison>
; CHECK-NEXT:    [[SHIFT2:%.*]] = shl <2 x i8> [[Y:%.*]], <i8 poison, i8 2>
; CHECK-NEXT:    [[BW2:%.*]] = xor <2 x i8> [[SHIFT2]], <i8 44, i8 poison>
; CHECK-NEXT:    [[BW1:%.*]] = and <2 x i8> [[SHIFT1]], [[BW2]]
; CHECK-NEXT:    ret <2 x i8> [[BW1]]
;
  %shift1 = shl <2 x i8> %x, <i8 2, i8 poison>
  %shift2 = shl <2 x i8> %y, <i8 poison, i8 2>
  %bw2 = xor <2 x i8> %shift2, <i8 44, i8 poison>
  %bw1 = and <2 x i8> %shift1, %bw2
  ret <2 x i8> %bw1
}

define i8 @lshr_or_or_no_const(i8 %x, i8 %y, i8 %sh, i8 %mask) {
; CHECK-LABEL: @lshr_or_or_no_const(
; CHECK-NEXT:    [[TMP1:%.*]] = or i8 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = lshr i8 [[TMP1]], [[SH:%.*]]
; CHECK-NEXT:    [[BW1:%.*]] = or i8 [[TMP2]], [[MASK:%.*]]
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = lshr i8 %x, %sh
  %shift2 = lshr i8 %y, %sh
  %bw2 = or i8 %shift2, %mask
  %bw1 = or i8 %shift1, %bw2
  ret i8 %bw1
}

define i8 @lshr_or_or_no_const_fail(i8 %x, i8 %y, i8 %sh, i8 %mask) {
; CHECK-LABEL: @lshr_or_or_no_const_fail(
; CHECK-NEXT:    [[SHIFT1:%.*]] = shl i8 [[X:%.*]], [[SH:%.*]]
; CHECK-NEXT:    [[SHIFT2:%.*]] = lshr i8 [[Y:%.*]], [[SH]]
; CHECK-NEXT:    [[BW2:%.*]] = or i8 [[SHIFT2]], [[MASK:%.*]]
; CHECK-NEXT:    [[BW1:%.*]] = or i8 [[SHIFT1]], [[BW2]]
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = shl i8 %x, %sh
  %shift2 = lshr i8 %y, %sh
  %bw2 = or i8 %shift2, %mask
  %bw1 = or i8 %shift1, %bw2
  ret i8 %bw1
}

define i8 @shl_xor_xor_no_const(i8 %x, i8 %y, i8 %sh, i8 %mask) {
; CHECK-LABEL: @shl_xor_xor_no_const(
; CHECK-NEXT:    [[TMP1:%.*]] = xor i8 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = shl i8 [[TMP1]], [[SH:%.*]]
; CHECK-NEXT:    [[BW1:%.*]] = xor i8 [[TMP2]], [[MASK:%.*]]
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = shl i8 %x, %sh
  %shift2 = shl i8 %y, %sh
  %bw2 = xor i8 %shift2, %mask
  %bw1 = xor i8 %shift1, %bw2
  ret i8 %bw1
}

define i8 @shl_xor_and_no_const_fail(i8 %x, i8 %y, i8 %sh, i8 %mask) {
; CHECK-LABEL: @shl_xor_and_no_const_fail(
; CHECK-NEXT:    [[SHIFT1:%.*]] = shl i8 [[X:%.*]], [[SH:%.*]]
; CHECK-NEXT:    [[SHIFT2:%.*]] = shl i8 [[Y:%.*]], [[SH]]
; CHECK-NEXT:    [[BW2:%.*]] = xor i8 [[SHIFT2]], [[MASK:%.*]]
; CHECK-NEXT:    [[BW1:%.*]] = and i8 [[SHIFT1]], [[BW2]]
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = shl i8 %x, %sh
  %shift2 = shl i8 %y, %sh
  %bw2 = xor i8 %shift2, %mask
  %bw1 = and i8 %shift1, %bw2
  ret i8 %bw1
}

define <2 x i8> @shl_and_and_no_const(<2 x i8> %x, <2 x i8> %y, <2 x i8> %sh, <2 x i8> %mask) {
; CHECK-LABEL: @shl_and_and_no_const(
; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i8> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = shl <2 x i8> [[TMP1]], [[SH:%.*]]
; CHECK-NEXT:    [[BW1:%.*]] = and <2 x i8> [[TMP2]], [[MASK:%.*]]
; CHECK-NEXT:    ret <2 x i8> [[BW1]]
;
  %shift1 = shl <2 x i8> %x, %sh
  %shift2 = shl <2 x i8> %y, %sh
  %bw2 = and <2 x i8> %shift2, %mask
  %bw1 = and <2 x i8> %shift1, %bw2
  ret <2 x i8> %bw1
}

define i8 @shl_add_add_no_const(i8 %x, i8 %y, i8 %sh, i8 %mask) {
; CHECK-LABEL: @shl_add_add_no_const(
; CHECK-NEXT:    [[TMP1:%.*]] = add i8 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = shl i8 [[TMP1]], [[SH:%.*]]
; CHECK-NEXT:    [[BW1:%.*]] = add i8 [[TMP2]], [[MASK:%.*]]
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = shl i8 %x, %sh
  %shift2 = shl i8 %y, %sh
  %bw2 = add i8 %shift2, %mask
  %bw1 = add i8 %shift1, %bw2
  ret i8 %bw1
}

define i8 @lshr_add_add_no_const_fail(i8 %x, i8 %y, i8 %sh, i8 %mask) {
; CHECK-LABEL: @lshr_add_add_no_const_fail(
; CHECK-NEXT:    [[SHIFT1:%.*]] = lshr i8 [[X:%.*]], [[SH:%.*]]
; CHECK-NEXT:    [[SHIFT2:%.*]] = lshr i8 [[Y:%.*]], [[SH]]
; CHECK-NEXT:    [[BW2:%.*]] = add i8 [[SHIFT2]], [[MASK:%.*]]
; CHECK-NEXT:    [[BW1:%.*]] = add i8 [[SHIFT1]], [[BW2]]
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = lshr i8 %x, %sh
  %shift2 = lshr i8 %y, %sh
  %bw2 = add i8 %shift2, %mask
  %bw1 = add i8 %shift1, %bw2
  ret i8 %bw1
}

define <2 x i8> @lshr_add_and(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @lshr_add_and(
; CHECK-NEXT:    [[TMP1:%.*]] = add <2 x i8> [[Y:%.*]], <i8 -8, i8 16>
; CHECK-NEXT:    [[TMP2:%.*]] = and <2 x i8> [[X:%.*]], [[TMP1]]
; CHECK-NEXT:    [[BW1:%.*]] = lshr <2 x i8> [[TMP2]], <i8 3, i8 4>
; CHECK-NEXT:    ret <2 x i8> [[BW1]]
;
  %shift1 = lshr <2 x i8> %x, <i8 3, i8 4>
  %shift2 = lshr <2 x i8> %y, <i8 3, i8 4>
  %bw2 = add <2 x i8> %shift2, <i8 255, i8 1>
  %bw1 = and <2 x i8> %shift1, %bw2
  ret <2 x i8> %bw1
}

define <2 x i8> @lshr_add_or_fail_dif_masks(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @lshr_add_or_fail_dif_masks(
; CHECK-NEXT:    [[SHIFT1:%.*]] = lshr <2 x i8> [[X:%.*]], <i8 3, i8 4>
; CHECK-NEXT:    [[SHIFT2:%.*]] = lshr <2 x i8> [[Y:%.*]], <i8 poison, i8 3>
; CHECK-NEXT:    [[BW2:%.*]] = add nsw <2 x i8> [[SHIFT2]], <i8 -1, i8 1>
; CHECK-NEXT:    [[BW1:%.*]] = and <2 x i8> [[SHIFT1]], [[BW2]]
; CHECK-NEXT:    ret <2 x i8> [[BW1]]
;
  %shift1 = lshr <2 x i8> %x, <i8 3, i8 4>
  %shift2 = lshr <2 x i8> %y, <i8 poison, i8 3>
  %bw2 = add <2 x i8> %shift2, <i8 255, i8 1>
  %bw1 = and <2 x i8> %shift1, %bw2
  ret <2 x i8> %bw1
}

define <2 x i8> @shl_or_or_good_mask(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @shl_or_or_good_mask(
; CHECK-NEXT:    [[TMP1:%.*]] = or <2 x i8> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = shl <2 x i8> [[TMP1]], <i8 1, i8 1>
; CHECK-NEXT:    [[BW1:%.*]] = or <2 x i8> [[TMP2]], <i8 18, i8 24>
; CHECK-NEXT:    ret <2 x i8> [[BW1]]
;
  %shift1 = shl <2 x i8> %x, <i8 1, i8 1>
  %shift2 = shl <2 x i8> %y, <i8 1, i8 1>
  %bw2 = or <2 x i8> %shift2, <i8 18, i8 24>
  %bw1 = or <2 x i8> %shift1, %bw2
  ret <2 x i8> %bw1
}

define <2 x i8> @shl_or_or_fail_bad_mask(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @shl_or_or_fail_bad_mask(
; CHECK-NEXT:    [[TMP1:%.*]] = or <2 x i8> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = shl <2 x i8> [[TMP1]], <i8 1, i8 1>
; CHECK-NEXT:    [[BW1:%.*]] = or <2 x i8> [[TMP2]], <i8 19, i8 24>
; CHECK-NEXT:    ret <2 x i8> [[BW1]]
;
  %shift1 = shl <2 x i8> %x, <i8 1, i8 1>
  %shift2 = shl <2 x i8> %y, <i8 1, i8 1>
  %bw2 = or <2 x i8> %shift2, <i8 19, i8 24>
  %bw1 = or <2 x i8> %shift1, %bw2
  ret <2 x i8> %bw1
}

define i8 @lshr_xor_or_good_mask(i8 %x, i8 %y) {
; CHECK-LABEL: @lshr_xor_or_good_mask(
; CHECK-NEXT:    [[TMP1:%.*]] = or i8 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = lshr i8 [[TMP1]], 4
; CHECK-NEXT:    [[BW1:%.*]] = or disjoint i8 [[TMP2]], 48
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = lshr i8 %x, 4
  %shift2 = lshr i8 %y, 4
  %bw2 = xor i8 %shift2, 48
  %bw1 = or i8 %shift1, %bw2
  ret i8 %bw1
}

define i8 @lshr_xor_or_fail_bad_mask(i8 %x, i8 %y) {
; CHECK-LABEL: @lshr_xor_or_fail_bad_mask(
; CHECK-NEXT:    [[SHIFT1:%.*]] = lshr i8 [[X:%.*]], 6
; CHECK-NEXT:    [[SHIFT2:%.*]] = lshr i8 [[Y:%.*]], 6
; CHECK-NEXT:    [[BW2:%.*]] = xor i8 [[SHIFT2]], -127
; CHECK-NEXT:    [[BW1:%.*]] = or i8 [[SHIFT1]], [[BW2]]
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = lshr i8 %x, 6
  %shift2 = lshr i8 %y, 6
  %bw2 = xor i8 %shift2, 129
  %bw1 = or i8 %shift1, %bw2
  ret i8 %bw1
}

define <2 x i8> @lshr_or_xor_good_mask(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @lshr_or_xor_good_mask(
; CHECK-NEXT:    [[TMP1:%.*]] = or <2 x i8> [[Y:%.*]], <i8 -64, i8 64>
; CHECK-NEXT:    [[TMP2:%.*]] = xor <2 x i8> [[X:%.*]], [[TMP1]]
; CHECK-NEXT:    [[BW1:%.*]] = lshr <2 x i8> [[TMP2]], <i8 6, i8 6>
; CHECK-NEXT:    ret <2 x i8> [[BW1]]
;
  %shift1 = lshr <2 x i8> %x, <i8 6, i8 6>
  %shift2 = lshr <2 x i8> %y, <i8 6, i8 6>
  %bw2 = or <2 x i8> %shift2, <i8 3, i8 1>
  %bw1 = xor <2 x i8> %shift1, %bw2
  ret <2 x i8> %bw1
}

define <2 x i8> @lshr_or_xor_fail_bad_mask(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @lshr_or_xor_fail_bad_mask(
; CHECK-NEXT:    [[SHIFT1:%.*]] = lshr <2 x i8> [[X:%.*]], <i8 6, i8 6>
; CHECK-NEXT:    [[SHIFT2:%.*]] = lshr <2 x i8> [[Y:%.*]], <i8 6, i8 6>
; CHECK-NEXT:    [[BW2:%.*]] = or <2 x i8> [[SHIFT2]], <i8 7, i8 1>
; CHECK-NEXT:    [[BW1:%.*]] = xor <2 x i8> [[SHIFT1]], [[BW2]]
; CHECK-NEXT:    ret <2 x i8> [[BW1]]
;
  %shift1 = lshr <2 x i8> %x, <i8 6, i8 6>
  %shift2 = lshr <2 x i8> %y, <i8 6, i8 6>
  %bw2 = or <2 x i8> %shift2, <i8 7, i8 1>
  %bw1 = xor <2 x i8> %shift1, %bw2
  ret <2 x i8> %bw1
}

define i8 @shl_xor_xor_good_mask(i8 %x, i8 %y) {
; CHECK-LABEL: @shl_xor_xor_good_mask(
; CHECK-NEXT:    [[TMP1:%.*]] = xor i8 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = shl i8 [[TMP1]], 1
; CHECK-NEXT:    [[BW1:%.*]] = xor i8 [[TMP2]], 88
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = shl i8 %x, 1
  %shift2 = shl i8 %y, 1
  %bw2 = xor i8 %shift2, 88
  %bw1 = xor i8 %shift1, %bw2
  ret i8 %bw1
}

define i8 @shl_xor_xor_bad_mask_distribute(i8 %x, i8 %y) {
; CHECK-LABEL: @shl_xor_xor_bad_mask_distribute(
; CHECK-NEXT:    [[TMP1:%.*]] = xor i8 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = shl i8 [[TMP1]], 1
; CHECK-NEXT:    [[BW1:%.*]] = xor i8 [[TMP2]], -68
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = shl i8 %x, 1
  %shift2 = shl i8 %y, 1
  %bw2 = xor i8 %shift2, 188
  %bw1 = xor i8 %shift1, %bw2
  ret i8 %bw1
}

define i8 @shl_add_and(i8 %x, i8 %y) {
; CHECK-LABEL: @shl_add_and(
; CHECK-NEXT:    [[TMP1:%.*]] = add i8 [[Y:%.*]], 61
; CHECK-NEXT:    [[TMP2:%.*]] = and i8 [[X:%.*]], [[TMP1]]
; CHECK-NEXT:    [[BW1:%.*]] = shl i8 [[TMP2]], 1
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = shl i8 %x, 1
  %shift2 = shl i8 %y, 1
  %bw2 = add i8 %shift2, 123
  %bw1 = and i8 %shift1, %bw2
  ret i8 %bw1
}

define i8 @lshr_and_add_fail(i8 %x, i8 %y) {
; CHECK-LABEL: @lshr_and_add_fail(
; CHECK-NEXT:    [[SHIFT1:%.*]] = lshr i8 [[X:%.*]], 1
; CHECK-NEXT:    [[SHIFT2:%.*]] = lshr i8 [[Y:%.*]], 1
; CHECK-NEXT:    [[BW2:%.*]] = and i8 [[SHIFT2]], 123
; CHECK-NEXT:    [[BW1:%.*]] = add nuw i8 [[SHIFT1]], [[BW2]]
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = lshr i8 %x, 1
  %shift2 = lshr i8 %y, 1
  %bw2 = and i8 %shift2, 123
  %bw1 = add i8 %shift1, %bw2
  ret i8 %bw1
}

define i8 @lshr_add_or_fail(i8 %x, i8 %y) {
; CHECK-LABEL: @lshr_add_or_fail(
; CHECK-NEXT:    [[SHIFT1:%.*]] = lshr i8 [[X:%.*]], 1
; CHECK-NEXT:    [[SHIFT2:%.*]] = lshr i8 [[Y:%.*]], 1
; CHECK-NEXT:    [[BW2:%.*]] = add nuw i8 [[SHIFT2]], 123
; CHECK-NEXT:    [[BW1:%.*]] = or i8 [[SHIFT1]], [[BW2]]
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = lshr i8 %x, 1
  %shift2 = lshr i8 %y, 1
  %bw2 = add i8 %shift2, 123
  %bw1 = or i8 %shift1, %bw2
  ret i8 %bw1
}

define i8 @lshr_add_xor_fail(i8 %x, i8 %y) {
; CHECK-LABEL: @lshr_add_xor_fail(
; CHECK-NEXT:    [[SHIFT1:%.*]] = lshr i8 [[X:%.*]], 1
; CHECK-NEXT:    [[SHIFT2:%.*]] = lshr i8 [[Y:%.*]], 1
; CHECK-NEXT:    [[BW2:%.*]] = add nuw i8 [[SHIFT2]], 123
; CHECK-NEXT:    [[BW1:%.*]] = xor i8 [[SHIFT1]], [[BW2]]
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = lshr i8 %x, 1
  %shift2 = lshr i8 %y, 1
  %bw2 = add i8 %shift2, 123
  %bw1 = xor i8 %shift1, %bw2
  ret i8 %bw1
}

define <2 x i8> @lshr_and_add(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @lshr_and_add(
; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i8> [[X:%.*]], <i8 11, i8 3>
; CHECK-NEXT:    [[TMP2:%.*]] = add <2 x i8> [[Y:%.*]], [[TMP1]]
; CHECK-NEXT:    [[BW1:%.*]] = shl <2 x i8> [[TMP2]], <i8 4, i8 5>
; CHECK-NEXT:    ret <2 x i8> [[BW1]]
;
  %shift1 = shl <2 x i8> %x, <i8 4, i8 5>
  %shift2 = shl <2 x i8> %y, <i8 4, i8 5>
  %bw2 = and <2 x i8> %shift1, <i8 189, i8 123>
  %bw1 = add <2 x i8> %shift2, %bw2
  ret <2 x i8> %bw1
}

define <2 x i8> @lshr_or_add_fail(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @lshr_or_add_fail(
; CHECK-NEXT:    [[SHIFT1:%.*]] = shl <2 x i8> [[X:%.*]], <i8 4, i8 5>
; CHECK-NEXT:    [[SHIFT2:%.*]] = shl <2 x i8> [[Y:%.*]], <i8 4, i8 5>
; CHECK-NEXT:    [[BW2:%.*]] = or <2 x i8> [[SHIFT1]], <i8 -67, i8 123>
; CHECK-NEXT:    [[BW1:%.*]] = add <2 x i8> [[SHIFT2]], [[BW2]]
; CHECK-NEXT:    ret <2 x i8> [[BW1]]
;
  %shift1 = shl <2 x i8> %x, <i8 4, i8 5>
  %shift2 = shl <2 x i8> %y, <i8 4, i8 5>
  %bw2 = or <2 x i8> %shift1, <i8 189, i8 123>
  %bw1 = add <2 x i8> %shift2, %bw2
  ret <2 x i8> %bw1
}

define i8 @shl_add_and_fail_mismatch_shift(i8 %x, i8 %y) {
; CHECK-LABEL: @shl_add_and_fail_mismatch_shift(
; CHECK-NEXT:    [[SHIFT1:%.*]] = shl i8 [[X:%.*]], 1
; CHECK-NEXT:    [[SHIFT2:%.*]] = lshr i8 [[Y:%.*]], 1
; CHECK-NEXT:    [[BW2:%.*]] = add nuw i8 [[SHIFT2]], 123
; CHECK-NEXT:    [[BW1:%.*]] = and i8 [[SHIFT1]], [[BW2]]
; CHECK-NEXT:    ret i8 [[BW1]]
;
  %shift1 = shl i8 %x, 1
  %shift2 = lshr i8 %y, 1
  %bw2 = add i8 %shift2, 123
  %bw1 = and i8 %shift1, %bw2
  ret i8 %bw1
}

; Fold (-x >> y) & ((x >> y) ^ -1) -> (-x & ~x) >> y

define i8 @and_ashr_not(i8 %x, i8 %y, i8 %shamt) {
; CHECK-LABEL: @and_ashr_not(
; CHECK-NEXT:    [[TMP1:%.*]] = xor i8 [[Y:%.*]], -1
; CHECK-NEXT:    [[TMP2:%.*]] = and i8 [[X:%.*]], [[TMP1]]
; CHECK-NEXT:    [[AND:%.*]] = ashr i8 [[TMP2]], [[SHAMT:%.*]]
; CHECK-NEXT:    ret i8 [[AND]]
;
  %x.shift = ashr i8 %x, %shamt
  %y.shift = ashr i8 %y, %shamt
  %y.shift.not = xor i8 %y.shift, -1
  %and = and i8 %x.shift, %y.shift.not
  ret i8 %and
}

define i8 @and_ashr_not_commuted(i8 %x, i8 %y, i8 %shamt) {
; CHECK-LABEL: @and_ashr_not_commuted(
; CHECK-NEXT:    [[TMP1:%.*]] = xor i8 [[Y:%.*]], -1
; CHECK-NEXT:    [[TMP2:%.*]] = and i8 [[X:%.*]], [[TMP1]]
; CHECK-NEXT:    [[AND:%.*]] = ashr i8 [[TMP2]], [[SHAMT:%.*]]
; CHECK-NEXT:    ret i8 [[AND]]
;
  %x.shift = ashr i8 %x, %shamt
  %y.shift = ashr i8 %y, %shamt
  %y.shift.not = xor i8 %y.shift, -1
  %and = and i8 %y.shift.not, %x.shift
  ret i8 %and
}

; Negative test: lshr instead of ashr

define i8 @and_ashr_not_fail_lshr_ashr(i8 %x, i8 %y, i8 %shamt) {
; CHECK-LABEL: @and_ashr_not_fail_lshr_ashr(
; CHECK-NEXT:    [[X_SHIFT:%.*]] = lshr i8 [[X:%.*]], [[SHAMT:%.*]]
; CHECK-NEXT:    [[Y_SHIFT:%.*]] = ashr i8 [[Y:%.*]], [[SHAMT]]
; CHECK-NEXT:    [[Y_SHIFT_NOT:%.*]] = xor i8 [[Y_SHIFT]], -1
; CHECK-NEXT:    [[AND:%.*]] = and i8 [[X_SHIFT]], [[Y_SHIFT_NOT]]
; CHECK-NEXT:    ret i8 [[AND]]
;
  %x.shift = lshr i8 %x, %shamt
  %y.shift = ashr i8 %y, %shamt
  %y.shift.not = xor i8 %y.shift, -1
  %and = and i8 %x.shift, %y.shift.not
  ret i8 %and
}

; Negative test: lshr instead of ashr

define i8 @and_ashr_not_fail_ashr_lshr(i8 %x, i8 %y, i8 %shamt) {
; CHECK-LABEL: @and_ashr_not_fail_ashr_lshr(
; CHECK-NEXT:    [[X_SHIFT:%.*]] = ashr i8 [[X:%.*]], [[SHAMT:%.*]]
; CHECK-NEXT:    [[Y_SHIFT:%.*]] = lshr i8 [[Y:%.*]], [[SHAMT]]
; CHECK-NEXT:    [[Y_SHIFT_NOT:%.*]] = xor i8 [[Y_SHIFT]], -1
; CHECK-NEXT:    [[AND:%.*]] = and i8 [[X_SHIFT]], [[Y_SHIFT_NOT]]
; CHECK-NEXT:    ret i8 [[AND]]
;
  %x.shift = ashr i8 %x, %shamt
  %y.shift = lshr i8 %y, %shamt
  %y.shift.not = xor i8 %y.shift, -1
  %and = and i8 %x.shift, %y.shift.not
  ret i8 %and
}

; Negative test: invalid xor constant

define i8 @and_ashr_not_fail_invalid_xor_constant(i8 %x, i8 %y, i8 %shamt) {
; CHECK-LABEL: @and_ashr_not_fail_invalid_xor_constant(
; CHECK-NEXT:    [[X_SHIFT:%.*]] = ashr i8 [[X:%.*]], [[SHAMT:%.*]]
; CHECK-NEXT:    [[Y_SHIFT:%.*]] = ashr i8 [[Y:%.*]], [[SHAMT]]
; CHECK-NEXT:    [[Y_SHIFT_NOT:%.*]] = xor i8 [[Y_SHIFT]], -2
; CHECK-NEXT:    [[AND:%.*]] = and i8 [[X_SHIFT]], [[Y_SHIFT_NOT]]
; CHECK-NEXT:    ret i8 [[AND]]
;
  %x.shift = ashr i8 %x, %shamt
  %y.shift = ashr i8 %y, %shamt
  %y.shift.not = xor i8 %y.shift, -2
  %and = and i8 %x.shift, %y.shift.not
  ret i8 %and
}

define <4 x i8> @and_ashr_not_vec(<4 x i8> %x, <4 x i8> %y, <4 x i8> %shamt) {
; CHECK-LABEL: @and_ashr_not_vec(
; CHECK-NEXT:    [[TMP1:%.*]] = xor <4 x i8> [[Y:%.*]], <i8 -1, i8 -1, i8 -1, i8 -1>
; CHECK-NEXT:    [[TMP2:%.*]] = and <4 x i8> [[X:%.*]], [[TMP1]]
; CHECK-NEXT:    [[AND:%.*]] = ashr <4 x i8> [[TMP2]], [[SHAMT:%.*]]
; CHECK-NEXT:    ret <4 x i8> [[AND]]
;
  %x.shift = ashr <4 x i8> %x, %shamt
  %y.shift = ashr <4 x i8> %y, %shamt
  %y.shift.not = xor <4 x i8> %y.shift, <i8 -1, i8 -1, i8 -1, i8 -1>
  %and = and <4 x i8> %x.shift, %y.shift.not
  ret <4 x i8> %and
}

define <4 x i8> @and_ashr_not_vec_commuted(<4 x i8> %x, <4 x i8> %y, <4 x i8> %shamt) {
; CHECK-LABEL: @and_ashr_not_vec_commuted(
; CHECK-NEXT:    [[TMP1:%.*]] = xor <4 x i8> [[Y:%.*]], <i8 -1, i8 -1, i8 -1, i8 -1>
; CHECK-NEXT:    [[TMP2:%.*]] = and <4 x i8> [[X:%.*]], [[TMP1]]
; CHECK-NEXT:    [[AND:%.*]] = ashr <4 x i8> [[TMP2]], [[SHAMT:%.*]]
; CHECK-NEXT:    ret <4 x i8> [[AND]]
;
  %x.shift = ashr <4 x i8> %x, %shamt
  %y.shift = ashr <4 x i8> %y, %shamt
  %y.shift.not = xor <4 x i8> %y.shift, <i8 -1, i8 -1, i8 -1, i8 -1>
  %and = and <4 x i8> %y.shift.not, %x.shift
  ret <4 x i8> %and
}

define <4 x i8> @and_ashr_not_vec_poison_1(<4 x i8> %x, <4 x i8> %y, <4 x i8> %shamt) {
; CHECK-LABEL: @and_ashr_not_vec_poison_1(
; CHECK-NEXT:    [[TMP1:%.*]] = xor <4 x i8> [[Y:%.*]], <i8 -1, i8 -1, i8 -1, i8 -1>
; CHECK-NEXT:    [[TMP2:%.*]] = and <4 x i8> [[X:%.*]], [[TMP1]]
; CHECK-NEXT:    [[AND:%.*]] = ashr <4 x i8> [[TMP2]], [[SHAMT:%.*]]
; CHECK-NEXT:    ret <4 x i8> [[AND]]
;
  %x.shift = ashr <4 x i8> %x, %shamt
  %y.shift = ashr <4 x i8> %y, %shamt
  %y.shift.not = xor <4 x i8> %y.shift, <i8 -1, i8 poison, i8 poison, i8 poison>
  %and = and <4 x i8> %x.shift, %y.shift.not
  ret <4 x i8> %and
}

define <4 x i8> @and_ashr_not_vec_poison_2(<4 x i8> %x, <4 x i8> %y, <4 x i8> %shamt) {
; CHECK-LABEL: @and_ashr_not_vec_poison_2(
; CHECK-NEXT:    ret <4 x i8> poison
;
  %x.shift = ashr <4 x i8> %x, %shamt
  %y.shift = ashr <4 x i8> %y, %shamt
  %y.shift.not = xor <4 x i8> %y.shift, <i8 poison, i8 poison, i8 poison, i8 poison>
  %and = and <4 x i8> %x.shift, %y.shift.not
  ret <4 x i8> %and
}

; Fold (-x >> y) | ((x >> y) ^ -1) -> (-x | ~x) >> y

define i8 @or_ashr_not(i8 %x, i8 %y, i8 %shamt) {
; CHECK-LABEL: @or_ashr_not(
; CHECK-NEXT:    [[TMP1:%.*]] = xor i8 [[Y:%.*]], -1
; CHECK-NEXT:    [[TMP2:%.*]] = or i8 [[X:%.*]], [[TMP1]]
; CHECK-NEXT:    [[OR:%.*]] = ashr i8 [[TMP2]], [[SHAMT:%.*]]
; CHECK-NEXT:    ret i8 [[OR]]
;
  %x.shift = ashr i8 %x, %shamt
  %y.shift = ashr i8 %y, %shamt
  %y.shift.not = xor i8 %y.shift, -1
  %or = or i8 %x.shift, %y.shift.not
  ret i8 %or
}

define i8 @or_ashr_not_commuted(i8 %x, i8 %y, i8 %shamt) {
; CHECK-LABEL: @or_ashr_not_commuted(
; CHECK-NEXT:    [[TMP1:%.*]] = xor i8 [[Y:%.*]], -1
; CHECK-NEXT:    [[TMP2:%.*]] = or i8 [[X:%.*]], [[TMP1]]
; CHECK-NEXT:    [[OR:%.*]] = ashr i8 [[TMP2]], [[SHAMT:%.*]]
; CHECK-NEXT:    ret i8 [[OR]]
;
  %x.shift = ashr i8 %x, %shamt
  %y.shift = ashr i8 %y, %shamt
  %y.shift.not = xor i8 %y.shift, -1
  %or = or i8 %y.shift.not, %x.shift
  ret i8 %or
}

; Negative test: lshr instead of ashr

define i8 @or_ashr_not_fail_lshr_ashr(i8 %x, i8 %y, i8 %shamt) {
; CHECK-LABEL: @or_ashr_not_fail_lshr_ashr(
; CHECK-NEXT:    [[X_SHIFT:%.*]] = lshr i8 [[X:%.*]], [[SHAMT:%.*]]
; CHECK-NEXT:    [[Y_SHIFT:%.*]] = ashr i8 [[Y:%.*]], [[SHAMT]]
; CHECK-NEXT:    [[Y_SHIFT_NOT:%.*]] = xor i8 [[Y_SHIFT]], -1
; CHECK-NEXT:    [[OR:%.*]] = or i8 [[X_SHIFT]], [[Y_SHIFT_NOT]]
; CHECK-NEXT:    ret i8 [[OR]]
;
  %x.shift = lshr i8 %x, %shamt
  %y.shift = ashr i8 %y, %shamt
  %y.shift.not = xor i8 %y.shift, -1
  %or = or i8 %x.shift, %y.shift.not
  ret i8 %or
}

; Negative test: lshr instead of ashr

define i8 @or_ashr_not_fail_ashr_lshr(i8 %x, i8 %y, i8 %shamt) {
; CHECK-LABEL: @or_ashr_not_fail_ashr_lshr(
; CHECK-NEXT:    [[X_SHIFT:%.*]] = ashr i8 [[X:%.*]], [[SHAMT:%.*]]
; CHECK-NEXT:    [[Y_SHIFT:%.*]] = lshr i8 [[Y:%.*]], [[SHAMT]]
; CHECK-NEXT:    [[Y_SHIFT_NOT:%.*]] = xor i8 [[Y_SHIFT]], -1
; CHECK-NEXT:    [[OR:%.*]] = or i8 [[X_SHIFT]], [[Y_SHIFT_NOT]]
; CHECK-NEXT:    ret i8 [[OR]]
;
  %x.shift = ashr i8 %x, %shamt
  %y.shift = lshr i8 %y, %shamt
  %y.shift.not = xor i8 %y.shift, -1
  %or = or i8 %x.shift, %y.shift.not
  ret i8 %or
}

; Negative test: invalid xor constant

define i8 @or_ashr_not_fail_invalid_xor_constant(i8 %x, i8 %y, i8 %shamt) {
; CHECK-LABEL: @or_ashr_not_fail_invalid_xor_constant(
; CHECK-NEXT:    [[X_SHIFT:%.*]] = ashr i8 [[X:%.*]], [[SHAMT:%.*]]
; CHECK-NEXT:    [[Y_SHIFT:%.*]] = ashr i8 [[Y:%.*]], [[SHAMT]]
; CHECK-NEXT:    [[Y_SHIFT_NOT:%.*]] = xor i8 [[Y_SHIFT]], -2
; CHECK-NEXT:    [[OR:%.*]] = or i8 [[X_SHIFT]], [[Y_SHIFT_NOT]]
; CHECK-NEXT:    ret i8 [[OR]]
;
  %x.shift = ashr i8 %x, %shamt
  %y.shift = ashr i8 %y, %shamt
  %y.shift.not = xor i8 %y.shift, -2
  %or = or i8 %x.shift, %y.shift.not
  ret i8 %or
}

define <4 x i8> @or_ashr_not_vec(<4 x i8> %x, <4 x i8> %y, <4 x i8> %shamt) {
; CHECK-LABEL: @or_ashr_not_vec(
; CHECK-NEXT:    [[TMP1:%.*]] = xor <4 x i8> [[Y:%.*]], <i8 -1, i8 -1, i8 -1, i8 -1>
; CHECK-NEXT:    [[TMP2:%.*]] = or <4 x i8> [[X:%.*]], [[TMP1]]
; CHECK-NEXT:    [[OR:%.*]] = ashr <4 x i8> [[TMP2]], [[SHAMT:%.*]]
; CHECK-NEXT:    ret <4 x i8> [[OR]]
;
  %x.shift = ashr <4 x i8> %x, %shamt
  %y.shift = ashr <4 x i8> %y, %shamt
  %y.shift.not = xor <4 x i8> %y.shift, <i8 -1, i8 -1, i8 -1, i8 -1>
  %or = or <4 x i8> %x.shift, %y.shift.not
  ret <4 x i8> %or
}

define <4 x i8> @or_ashr_not_vec_commuted(<4 x i8> %x, <4 x i8> %y, <4 x i8> %shamt) {
; CHECK-LABEL: @or_ashr_not_vec_commuted(
; CHECK-NEXT:    [[TMP1:%.*]] = xor <4 x i8> [[Y:%.*]], <i8 -1, i8 -1, i8 -1, i8 -1>
; CHECK-NEXT:    [[TMP2:%.*]] = or <4 x i8> [[X:%.*]], [[TMP1]]
; CHECK-NEXT:    [[OR:%.*]] = ashr <4 x i8> [[TMP2]], [[SHAMT:%.*]]
; CHECK-NEXT:    ret <4 x i8> [[OR]]
;
  %x.shift = ashr <4 x i8> %x, %shamt
  %y.shift = ashr <4 x i8> %y, %shamt
  %y.shift.not = xor <4 x i8> %y.shift, <i8 -1, i8 -1, i8 -1, i8 -1>
  %or = or <4 x i8> %y.shift.not, %x.shift
  ret <4 x i8> %or
}

define <4 x i8> @or_ashr_not_vec_poison_1(<4 x i8> %x, <4 x i8> %y, <4 x i8> %shamt) {
; CHECK-LABEL: @or_ashr_not_vec_poison_1(
; CHECK-NEXT:    [[TMP1:%.*]] = xor <4 x i8> [[Y:%.*]], <i8 -1, i8 -1, i8 -1, i8 -1>
; CHECK-NEXT:    [[TMP2:%.*]] = or <4 x i8> [[X:%.*]], [[TMP1]]
; CHECK-NEXT:    [[OR:%.*]] = ashr <4 x i8> [[TMP2]], [[SHAMT:%.*]]
; CHECK-NEXT:    ret <4 x i8> [[OR]]
;
  %x.shift = ashr <4 x i8> %x, %shamt
  %y.shift = ashr <4 x i8> %y, %shamt
  %y.shift.not = xor <4 x i8> %y.shift, <i8 -1, i8 poison, i8 poison, i8 poison>
  %or = or <4 x i8> %x.shift, %y.shift.not
  ret <4 x i8> %or
}

define <4 x i8> @or_ashr_not_vec_poison_2(<4 x i8> %x, <4 x i8> %y, <4 x i8> %shamt) {
; CHECK-LABEL: @or_ashr_not_vec_poison_2(
; CHECK-NEXT:    ret <4 x i8> poison
;
  %x.shift = ashr <4 x i8> %x, %shamt
  %y.shift = ashr <4 x i8> %y, %shamt
  %y.shift.not = xor <4 x i8> %y.shift, <i8 poison, i8 poison, i8 poison, i8 poison>
  %or = or <4 x i8> %x.shift, %y.shift.not
  ret <4 x i8> %or
}

; Fold (-x >> y) ^ ((x >> y) ^ -1) -> (-x ^ ~x) >> y

define i8 @xor_ashr_not(i8 %x, i8 %y, i8 %shamt) {
; CHECK-LABEL: @xor_ashr_not(
; CHECK-NEXT:    [[TMP1:%.*]] = xor i8 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[DOTNOT:%.*]] = ashr i8 [[TMP1]], [[SHAMT:%.*]]
; CHECK-NEXT:    [[XOR:%.*]] = xor i8 [[DOTNOT]], -1
; CHECK-NEXT:    ret i8 [[XOR]]
;
  %x.shift = ashr i8 %x, %shamt
  %y.shift = ashr i8 %y, %shamt
  %y.shift.not = xor i8 %y.shift, -1
  %xor = xor i8 %x.shift, %y.shift.not
  ret i8 %xor
}

define i8 @xor_ashr_not_commuted(i8 %x, i8 %y, i8 %shamt) {
; CHECK-LABEL: @xor_ashr_not_commuted(
; CHECK-NEXT:    [[TMP1:%.*]] = xor i8 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[DOTNOT:%.*]] = ashr i8 [[TMP1]], [[SHAMT:%.*]]
; CHECK-NEXT:    [[XOR:%.*]] = xor i8 [[DOTNOT]], -1
; CHECK-NEXT:    ret i8 [[XOR]]
;
  %x.shift = ashr i8 %x, %shamt
  %y.shift = ashr i8 %y, %shamt
  %y.shift.not = xor i8 %y.shift, -1
  %xor = xor i8 %y.shift.not, %x.shift
  ret i8 %xor
}

; Negative test: lshr instead of ashr

define i8 @xor_ashr_not_fail_lshr_ashr(i8 %x, i8 %y, i8 %shamt) {
; CHECK-LABEL: @xor_ashr_not_fail_lshr_ashr(
; CHECK-NEXT:    [[X_SHIFT:%.*]] = lshr i8 [[X:%.*]], [[SHAMT:%.*]]
; CHECK-NEXT:    [[Y_SHIFT:%.*]] = ashr i8 [[Y:%.*]], [[SHAMT]]
; CHECK-NEXT:    [[TMP1:%.*]] = xor i8 [[Y_SHIFT]], [[X_SHIFT]]
; CHECK-NEXT:    [[XOR:%.*]] = xor i8 [[TMP1]], -1
; CHECK-NEXT:    ret i8 [[XOR]]
;
  %x.shift = lshr i8 %x, %shamt
  %y.shift = ashr i8 %y, %shamt
  %y.shift.not = xor i8 %y.shift, -1
  %xor = xor i8 %x.shift, %y.shift.not
  ret i8 %xor
}

; Negative test: lshr instead of ashr

define i8 @xor_ashr_not_fail_ashr_lshr(i8 %x, i8 %y, i8 %shamt) {
; CHECK-LABEL: @xor_ashr_not_fail_ashr_lshr(
; CHECK-NEXT:    [[X_SHIFT:%.*]] = ashr i8 [[X:%.*]], [[SHAMT:%.*]]
; CHECK-NEXT:    [[Y_SHIFT:%.*]] = lshr i8 [[Y:%.*]], [[SHAMT]]
; CHECK-NEXT:    [[TMP1:%.*]] = xor i8 [[Y_SHIFT]], [[X_SHIFT]]
; CHECK-NEXT:    [[XOR:%.*]] = xor i8 [[TMP1]], -1
; CHECK-NEXT:    ret i8 [[XOR]]
;
  %x.shift = ashr i8 %x, %shamt
  %y.shift = lshr i8 %y, %shamt
  %y.shift.not = xor i8 %y.shift, -1
  %xor = xor i8 %x.shift, %y.shift.not
  ret i8 %xor
}

; Negative test: invalid xor constant

define i8 @xor_ashr_not_fail_invalid_xor_constant(i8 %x, i8 %y, i8 %shamt) {
; CHECK-LABEL: @xor_ashr_not_fail_invalid_xor_constant(
; CHECK-NEXT:    [[Y_SHIFT1:%.*]] = xor i8 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[TMP1:%.*]] = ashr i8 [[Y_SHIFT1]], [[SHAMT:%.*]]
; CHECK-NEXT:    [[XOR:%.*]] = xor i8 [[TMP1]], -2
; CHECK-NEXT:    ret i8 [[XOR]]
;
  %x.shift = ashr i8 %x, %shamt
  %y.shift = ashr i8 %y, %shamt
  %y.shift.not = xor i8 %y.shift, -2
  %xor = xor i8 %x.shift, %y.shift.not
  ret i8 %xor
}

define <4 x i8> @xor_ashr_not_vec(<4 x i8> %x, <4 x i8> %y, <4 x i8> %shamt) {
; CHECK-LABEL: @xor_ashr_not_vec(
; CHECK-NEXT:    [[TMP1:%.*]] = xor <4 x i8> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[DOTNOT:%.*]] = ashr <4 x i8> [[TMP1]], [[SHAMT:%.*]]
; CHECK-NEXT:    [[XOR:%.*]] = xor <4 x i8> [[DOTNOT]], <i8 -1, i8 -1, i8 -1, i8 -1>
; CHECK-NEXT:    ret <4 x i8> [[XOR]]
;
  %x.shift = ashr <4 x i8> %x, %shamt
  %y.shift = ashr <4 x i8> %y, %shamt
  %y.shift.not = xor <4 x i8> %y.shift, <i8 -1, i8 -1, i8 -1, i8 -1>
  %xor = xor <4 x i8> %x.shift, %y.shift.not
  ret <4 x i8> %xor
}

define <4 x i8> @xor_ashr_not_vec_commuted(<4 x i8> %x, <4 x i8> %y, <4 x i8> %shamt) {
; CHECK-LABEL: @xor_ashr_not_vec_commuted(
; CHECK-NEXT:    [[TMP1:%.*]] = xor <4 x i8> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[DOTNOT:%.*]] = ashr <4 x i8> [[TMP1]], [[SHAMT:%.*]]
; CHECK-NEXT:    [[XOR:%.*]] = xor <4 x i8> [[DOTNOT]], <i8 -1, i8 -1, i8 -1, i8 -1>
; CHECK-NEXT:    ret <4 x i8> [[XOR]]
;
  %x.shift = ashr <4 x i8> %x, %shamt
  %y.shift = ashr <4 x i8> %y, %shamt
  %y.shift.not = xor <4 x i8> %y.shift, <i8 -1, i8 -1, i8 -1, i8 -1>
  %xor = xor <4 x i8> %y.shift.not, %x.shift
  ret <4 x i8> %xor
}

define <4 x i8> @xor_ashr_not_vec_poison_1(<4 x i8> %x, <4 x i8> %y, <4 x i8> %shamt) {
; CHECK-LABEL: @xor_ashr_not_vec_poison_1(
; CHECK-NEXT:    [[TMP1:%.*]] = xor <4 x i8> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[DOTNOT:%.*]] = ashr <4 x i8> [[TMP1]], [[SHAMT:%.*]]
; CHECK-NEXT:    [[XOR:%.*]] = xor <4 x i8> [[DOTNOT]], <i8 -1, i8 -1, i8 -1, i8 -1>
; CHECK-NEXT:    ret <4 x i8> [[XOR]]
;
  %x.shift = ashr <4 x i8> %x, %shamt
  %y.shift = ashr <4 x i8> %y, %shamt
  %y.shift.not = xor <4 x i8> %y.shift, <i8 -1, i8 poison, i8 poison, i8 poison>
  %xor = xor <4 x i8> %x.shift, %y.shift.not
  ret <4 x i8> %xor
}

define <4 x i8> @xor_ashr_not_vec_poison_2(<4 x i8> %x, <4 x i8> %y, <4 x i8> %shamt) {
; CHECK-LABEL: @xor_ashr_not_vec_poison_2(
; CHECK-NEXT:    ret <4 x i8> poison
;
  %x.shift = ashr <4 x i8> %x, %shamt
  %y.shift = ashr <4 x i8> %y, %shamt
  %y.shift.not = xor <4 x i8> %y.shift, <i8 poison, i8 poison, i8 poison, i8 poison>
  %xor = xor <4 x i8> %x.shift, %y.shift.not
  ret <4 x i8> %xor
}

; Negative test: invalid binop

define i8 @binop_ashr_not_fail_invalid_binop(i8 %x, i8 %y, i8 %shamt) {
; CHECK-LABEL: @binop_ashr_not_fail_invalid_binop(
; CHECK-NEXT:    [[X_SHIFT:%.*]] = ashr i8 [[X:%.*]], [[SHAMT:%.*]]
; CHECK-NEXT:    [[Y_SHIFT:%.*]] = ashr i8 [[Y:%.*]], [[SHAMT]]
; CHECK-NEXT:    [[Y_SHIFT_NOT:%.*]] = xor i8 [[Y_SHIFT]], -1
; CHECK-NEXT:    [[ADD:%.*]] = add i8 [[X_SHIFT]], [[Y_SHIFT_NOT]]
; CHECK-NEXT:    ret i8 [[ADD]]
;
  %x.shift = ashr i8 %x, %shamt
  %y.shift = ashr i8 %y, %shamt
  %y.shift.not = xor i8 %y.shift, -1
  %add = add i8 %x.shift, %y.shift.not
  ret i8 %add
}