test/Transforms/InstCombine/binop-of-displaced-shifts.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
; RUN: opt -S -passes=instcombine < %s | FileCheck %s

define i8 @shl_or(i8 %x) {
; CHECK-LABEL: define i8 @shl_or
; CHECK-SAME: (i8 [[X:%.*]]) {
; CHECK-NEXT:    [[BINOP:%.*]] = shl i8 22, [[X]]
; CHECK-NEXT:    ret i8 [[BINOP]]
;
  %shift = shl i8 16, %x
  %add = add i8 %x, 1
  %shift2 = shl i8 3, %add
  %binop = or i8 %shift, %shift2
  ret i8 %binop
}

define i8 @lshr_or(i8 %x) {
; CHECK-LABEL: define i8 @lshr_or
; CHECK-SAME: (i8 [[X:%.*]]) {
; CHECK-NEXT:    [[BINOP:%.*]] = lshr i8 17, [[X]]
; CHECK-NEXT:    ret i8 [[BINOP]]
;
  %shift = lshr i8 16, %x
  %add = add i8 %x, 1
  %shift2 = lshr i8 3, %add
  %binop = or i8 %shift, %shift2
  ret i8 %binop
}

define i8 @ashr_or(i8 %x) {
; CHECK-LABEL: define i8 @ashr_or
; CHECK-SAME: (i8 [[X:%.*]]) {
; CHECK-NEXT:    [[BINOP:%.*]] = ashr i8 -64, [[X]]
; CHECK-NEXT:    ret i8 [[BINOP]]
;
  %shift = ashr i8 -64, %x
  %add = add i8 %x, 1
  %shift2 = ashr i8 -128, %add
  %binop = or i8 %shift, %shift2
  ret i8 %binop
}

define i8 @shl_xor(i8 %x) {
; CHECK-LABEL: define i8 @shl_xor
; CHECK-SAME: (i8 [[X:%.*]]) {
; CHECK-NEXT:    [[BINOP:%.*]] = shl i8 22, [[X]]
; CHECK-NEXT:    ret i8 [[BINOP]]
;
  %shift = shl i8 16, %x
  %add = add i8 %x, 1
  %shift2 = shl i8 3, %add
  %binop = xor i8 %shift, %shift2
  ret i8 %binop
}

define i8 @lshr_xor(i8 %x) {
; CHECK-LABEL: define i8 @lshr_xor
; CHECK-SAME: (i8 [[X:%.*]]) {
; CHECK-NEXT:    [[BINOP:%.*]] = lshr i8 17, [[X]]
; CHECK-NEXT:    ret i8 [[BINOP]]
;
  %shift = lshr i8 16, %x
  %add = add i8 %x, 1
  %shift2 = lshr i8 3, %add
  %binop = xor i8 %shift, %shift2
  ret i8 %binop
}

define i8 @ashr_xor(i8 %x) {
; CHECK-LABEL: define i8 @ashr_xor
; CHECK-SAME: (i8 [[X:%.*]]) {
; CHECK-NEXT:    [[BINOP:%.*]] = lshr i8 96, [[X]]
; CHECK-NEXT:    ret i8 [[BINOP]]
;
  %shift = ashr i8 -128, %x
  %add = add i8 %x, 1
  %shift2 = ashr i8 -64, %add
  %binop = xor i8 %shift, %shift2
  ret i8 %binop
}

define i8 @shl_and(i8 %x) {
; CHECK-LABEL: define i8 @shl_and
; CHECK-SAME: (i8 [[X:%.*]]) {
; CHECK-NEXT:    [[BINOP:%.*]] = shl i8 16, [[X]]
; CHECK-NEXT:    ret i8 [[BINOP]]
;
  %shift = shl i8 48, %x
  %add = add i8 %x, 1
  %shift2 = shl i8 8, %add
  %binop = and i8 %shift, %shift2
  ret i8 %binop
}

define i8 @lshr_and(i8 %x) {
; CHECK-LABEL: define i8 @lshr_and
; CHECK-SAME: (i8 [[X:%.*]]) {
; CHECK-NEXT:    [[BINOP:%.*]] = lshr i8 32, [[X]]
; CHECK-NEXT:    ret i8 [[BINOP]]
;
  %shift = lshr i8 48, %x
  %add = add i8 %x, 1
  %shift2 = lshr i8 64, %add
  %binop = and i8 %shift, %shift2
  ret i8 %binop
}

define i8 @ashr_and(i8 %x) {
; CHECK-LABEL: define i8 @ashr_and
; CHECK-SAME: (i8 [[X:%.*]]) {
; CHECK-NEXT:    [[BINOP:%.*]] = ashr i8 -64, [[X]]
; CHECK-NEXT:    ret i8 [[BINOP]]
;
  %shift = ashr i8 -64, %x
  %add = add i8 %x, 1
  %shift2 = ashr i8 -128, %add
  %binop = and i8 %shift, %shift2
  ret i8 %binop
}

define i8 @shl_add(i8 %x) {
; CHECK-LABEL: define i8 @shl_add
; CHECK-SAME: (i8 [[X:%.*]]) {
; CHECK-NEXT:    [[BINOP:%.*]] = shl i8 30, [[X]]
; CHECK-NEXT:    ret i8 [[BINOP]]
;
  %shift = shl i8 16, %x
  %add = add i8 %x, 1
  %shift2 = shl i8 7, %add
  %binop = add i8 %shift, %shift2
  ret i8 %binop
}

define i8 @lshr_add_fail(i8 %x) {
; CHECK-LABEL: define i8 @lshr_add_fail
; CHECK-SAME: (i8 [[X:%.*]]) {
; CHECK-NEXT:    [[SHIFT:%.*]] = lshr i8 16, [[X]]
; CHECK-NEXT:    [[ADD:%.*]] = add i8 [[X]], 1
; CHECK-NEXT:    [[SHIFT2:%.*]] = lshr i8 7, [[ADD]]
; CHECK-NEXT:    [[BINOP:%.*]] = add nuw nsw i8 [[SHIFT]], [[SHIFT2]]
; CHECK-NEXT:    ret i8 [[BINOP]]
;
  %shift = lshr i8 16, %x
  %add = add i8 %x, 1
  %shift2 = lshr i8 7, %add
  %binop = add i8 %shift, %shift2
  ret i8 %binop
}

define i8 @ashr_add_fail(i8 %x) {
; CHECK-LABEL: define i8 @ashr_add_fail
; CHECK-SAME: (i8 [[X:%.*]]) {
; CHECK-NEXT:    [[SHIFT:%.*]] = ashr exact i8 -128, [[X]]
; CHECK-NEXT:    [[ADD:%.*]] = add i8 [[X]], 1
; CHECK-NEXT:    [[SHIFT2:%.*]] = ashr exact i8 -128, [[ADD]]
; CHECK-NEXT:    [[BINOP:%.*]] = add i8 [[SHIFT]], [[SHIFT2]]
; CHECK-NEXT:    ret i8 [[BINOP]]
;
  %shift = ashr i8 -128, %x
  %add = add i8 %x, 1
  %shift2 = ashr i8 -128, %add
  %binop = add i8 %shift, %shift2
  ret i8 %binop
}

define i8 @shl_or_commuted(i8 %x) {
; CHECK-LABEL: define i8 @shl_or_commuted
; CHECK-SAME: (i8 [[X:%.*]]) {
; CHECK-NEXT:    [[BINOP:%.*]] = shl i8 22, [[X]]
; CHECK-NEXT:    ret i8 [[BINOP]]
;
  %shift = shl i8 16, %x
  %add = add i8 %x, 1
  %shift2 = shl i8 3, %add
  %binop = or i8 %shift2, %shift
  ret i8 %binop
}

define <2 x i8> @shl_or_splat(<2 x i8> %x) {
; CHECK-LABEL: define <2 x i8> @shl_or_splat
; CHECK-SAME: (<2 x i8> [[X:%.*]]) {
; CHECK-NEXT:    [[BINOP:%.*]] = shl <2 x i8> <i8 22, i8 22>, [[X]]
; CHECK-NEXT:    ret <2 x i8> [[BINOP]]
;
  %shift = shl <2 x i8> <i8 16, i8 16>, %x
  %add = add <2 x i8> %x, <i8 1, i8 1>
  %shift2 = shl <2 x i8> <i8 3, i8 3>, %add
  %binop = or <2 x i8> %shift, %shift2
  ret <2 x i8> %binop
}

define <2 x i8> @shl_or_non_splat(<2 x i8> %x) {
; CHECK-LABEL: define <2 x i8> @shl_or_non_splat
; CHECK-SAME: (<2 x i8> [[X:%.*]]) {
; CHECK-NEXT:    [[BINOP:%.*]] = shl <2 x i8> <i8 22, i8 60>, [[X]]
; CHECK-NEXT:    ret <2 x i8> [[BINOP]]
;
  %shift = shl <2 x i8> <i8 16, i8 32>, %x
  %add = add <2 x i8> %x, <i8 1, i8 2>
  %shift2 = shl <2 x i8> <i8 3, i8 7>, %add
  %binop = or <2 x i8> %shift, %shift2
  ret <2 x i8> %binop
}

define <2 x i8> @shl_or_poison_in_add(<2 x i8> %x) {
; CHECK-LABEL: define <2 x i8> @shl_or_poison_in_add
; CHECK-SAME: (<2 x i8> [[X:%.*]]) {
; CHECK-NEXT:    [[BINOP:%.*]] = shl <2 x i8> <i8 22, i8 poison>, [[X]]
; CHECK-NEXT:    ret <2 x i8> [[BINOP]]
;
  %shift = shl <2 x i8> <i8 16, i8 16>, %x
  %add = add <2 x i8> %x, <i8 1, i8 poison>
  %shift2 = shl <2 x i8> <i8 3, i8 3>, %add
  %binop = or <2 x i8> %shift, %shift2
  ret <2 x i8> %binop
}

define <2 x i8> @shl_or_poison_in_shift1(<2 x i8> %x) {
; CHECK-LABEL: define <2 x i8> @shl_or_poison_in_shift1
; CHECK-SAME: (<2 x i8> [[X:%.*]]) {
; CHECK-NEXT:    [[BINOP:%.*]] = shl <2 x i8> <i8 22, i8 poison>, [[X]]
; CHECK-NEXT:    ret <2 x i8> [[BINOP]]
;
  %shift = shl <2 x i8> <i8 16, i8 poison>, %x
  %add = add <2 x i8> %x, <i8 1, i8 1>
  %shift2 = shl <2 x i8> <i8 3, i8 3>, %add
  %binop = or <2 x i8> %shift, %shift2
  ret <2 x i8> %binop
}

define <2 x i8> @shl_or_poison_in_shift2(<2 x i8> %x) {
; CHECK-LABEL: define <2 x i8> @shl_or_poison_in_shift2
; CHECK-SAME: (<2 x i8> [[X:%.*]]) {
; CHECK-NEXT:    [[BINOP:%.*]] = shl <2 x i8> <i8 22, i8 poison>, [[X]]
; CHECK-NEXT:    ret <2 x i8> [[BINOP]]
;
  %shift = shl <2 x i8> <i8 16, i8 16>, %x
  %add = add <2 x i8> %x, <i8 1, i8 1>
  %shift2 = shl <2 x i8> <i8 3, i8 poison>, %add
  %binop = or <2 x i8> %shift, %shift2
  ret <2 x i8> %binop
}

declare void @use(i8)

define i8 @shl_or_multiuse(i8 %x) {
; CHECK-LABEL: define i8 @shl_or_multiuse
; CHECK-SAME: (i8 [[X:%.*]]) {
; CHECK-NEXT:    [[SHIFT:%.*]] = shl i8 16, [[X]]
; CHECK-NEXT:    [[ADD:%.*]] = add i8 [[X]], 1
; CHECK-NEXT:    [[SHIFT2:%.*]] = shl i8 3, [[ADD]]
; CHECK-NEXT:    call void @use(i8 [[SHIFT]])
; CHECK-NEXT:    call void @use(i8 [[ADD]])
; CHECK-NEXT:    call void @use(i8 [[SHIFT2]])
; CHECK-NEXT:    [[BINOP:%.*]] = shl i8 22, [[X]]
; CHECK-NEXT:    ret i8 [[BINOP]]
;
  %shift = shl i8 16, %x
  %add = add i8 %x, 1
  %shift2 = shl i8 3, %add
  call void @use(i8 %shift)
  call void @use(i8 %add)
  call void @use(i8 %shift2)
  %binop = or i8 %shift, %shift2
  ret i8 %binop
}

define i8 @mismatched_shifts(i8 %x) {
; CHECK-LABEL: define i8 @mismatched_shifts
; CHECK-SAME: (i8 [[X:%.*]]) {
; CHECK-NEXT:    [[SHIFT:%.*]] = shl i8 16, [[X]]
; CHECK-NEXT:    [[ADD:%.*]] = add i8 [[X]], 1
; CHECK-NEXT:    [[SHIFT2:%.*]] = lshr i8 3, [[ADD]]
; CHECK-NEXT:    [[BINOP:%.*]] = or disjoint i8 [[SHIFT]], [[SHIFT2]]
; CHECK-NEXT:    ret i8 [[BINOP]]
;
  %shift = shl i8 16, %x
  %add = add i8 %x, 1
  %shift2 = lshr i8 3, %add
  %binop = or i8 %shift, %shift2
  ret i8 %binop
}

define i8 @mismatched_ops(i8 %x, i8 %y) {
; CHECK-LABEL: define i8 @mismatched_ops
; CHECK-SAME: (i8 [[X:%.*]], i8 [[Y:%.*]]) {
; CHECK-NEXT:    [[SHIFT:%.*]] = shl i8 16, [[X]]
; CHECK-NEXT:    [[ADD:%.*]] = add i8 [[Y]], 1
; CHECK-NEXT:    [[SHIFT2:%.*]] = shl i8 3, [[ADD]]
; CHECK-NEXT:    [[BINOP:%.*]] = or i8 [[SHIFT]], [[SHIFT2]]
; CHECK-NEXT:    ret i8 [[BINOP]]
;
  %shift = shl i8 16, %x
  %add = add i8 %y, 1
  %shift2 = shl i8 3, %add
  %binop = or i8 %shift, %shift2
  ret i8 %binop
}

define i8 @add_out_of_range(i8 %x) {
; CHECK-LABEL: define i8 @add_out_of_range
; CHECK-SAME: (i8 [[X:%.*]]) {
; CHECK-NEXT:    [[SHIFT:%.*]] = shl i8 16, [[X]]
; CHECK-NEXT:    [[ADD:%.*]] = add i8 [[X]], 32
; CHECK-NEXT:    [[SHIFT2:%.*]] = shl i8 3, [[ADD]]
; CHECK-NEXT:    [[BINOP:%.*]] = or i8 [[SHIFT]], [[SHIFT2]]
; CHECK-NEXT:    ret i8 [[BINOP]]
;
  %shift = shl i8 16, %x
  %add = add i8 %x, 32
  %shift2 = shl i8 3, %add
  %binop = or i8 %shift, %shift2
  ret i8 %binop
}

define <2 x i8> @shl_or_non_splat_out_of_range(<2 x i8> %x) {
; CHECK-LABEL: define <2 x i8> @shl_or_non_splat_out_of_range
; CHECK-SAME: (<2 x i8> [[X:%.*]]) {
; CHECK-NEXT:    [[SHIFT:%.*]] = shl <2 x i8> <i8 16, i8 32>, [[X]]
; CHECK-NEXT:    [[ADD:%.*]] = add <2 x i8> [[X]], <i8 1, i8 32>
; CHECK-NEXT:    [[SHIFT2:%.*]] = shl <2 x i8> <i8 3, i8 7>, [[ADD]]
; CHECK-NEXT:    [[BINOP:%.*]] = or <2 x i8> [[SHIFT]], [[SHIFT2]]
; CHECK-NEXT:    ret <2 x i8> [[BINOP]]
;
  %shift = shl <2 x i8> <i8 16, i8 32>, %x
  %add = add <2 x i8> %x, <i8 1, i8 32>
  %shift2 = shl <2 x i8> <i8 3, i8 7>, %add
  %binop = or <2 x i8> %shift, %shift2
  ret <2 x i8> %binop
}

define i8 @shl_or_with_or_disjoint_instead_of_add(i8 %x) {
; CHECK-LABEL: define i8 @shl_or_with_or_disjoint_instead_of_add
; CHECK-SAME: (i8 [[X:%.*]]) {
; CHECK-NEXT:    [[BINOP:%.*]] = shl i8 22, [[X]]
; CHECK-NEXT:    ret i8 [[BINOP]]
;
  %shift = shl i8 16, %x
  %add = or disjoint i8 %x, 1
  %shift2 = shl i8 3, %add
  %binop = or i8 %shift, %shift2
  ret i8 %binop
}

define i8 @shl_or_with_or_instead_of_add(i8 %x) {
; CHECK-LABEL: define i8 @shl_or_with_or_instead_of_add
; CHECK-SAME: (i8 [[X:%.*]]) {
; CHECK-NEXT:    [[SHIFT:%.*]] = shl i8 16, [[X]]
; CHECK-NEXT:    [[ADD:%.*]] = or i8 [[X]], 1
; CHECK-NEXT:    [[SHIFT2:%.*]] = shl i8 3, [[ADD]]
; CHECK-NEXT:    [[BINOP:%.*]] = or i8 [[SHIFT]], [[SHIFT2]]
; CHECK-NEXT:    ret i8 [[BINOP]]
;
  %shift = shl i8 16, %x
  %add = or i8 %x, 1
  %shift2 = shl i8 3, %add
  %binop = or i8 %shift, %shift2
  ret i8 %binop
}