bswap.ll

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

target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32"

define i32 @test1(i32 %i) {
; CHECK-LABEL: @test1(
; CHECK-NEXT:    [[T12:%.*]] = call i32 @llvm.bswap.i32(i32 [[I:%.*]])
; CHECK-NEXT:    ret i32 [[T12]]
;
  %t1 = lshr i32 %i, 24
  %t3 = lshr i32 %i, 8
  %t4 = and i32 %t3, 65280
  %t5 = or i32 %t1, %t4
  %t7 = shl i32 %i, 8
  %t8 = and i32 %t7, 16711680
  %t9 = or i32 %t5, %t8
  %t11 = shl i32 %i, 24
  %t12 = or i32 %t9, %t11
  ret i32 %t12
}

define <2 x i32> @test1_vector(<2 x i32> %i) {
; CHECK-LABEL: @test1_vector(
; CHECK-NEXT:    [[T12:%.*]] = call <2 x i32> @llvm.bswap.v2i32(<2 x i32> [[I:%.*]])
; CHECK-NEXT:    ret <2 x i32> [[T12]]
;
  %t1 = lshr <2 x i32> %i, <i32 24, i32 24>
  %t3 = lshr <2 x i32> %i, <i32 8, i32 8>
  %t4 = and <2 x i32> %t3, <i32 65280, i32 65280>
  %t5 = or <2 x i32> %t1, %t4
  %t7 = shl <2 x i32> %i, <i32 8, i32 8>
  %t8 = and <2 x i32> %t7, <i32 16711680, i32 16711680>
  %t9 = or <2 x i32> %t5, %t8
  %t11 = shl <2 x i32> %i, <i32 24, i32 24>
  %t12 = or <2 x i32> %t9, %t11
  ret <2 x i32> %t12
}

define i32 @test2(i32 %arg) {
; CHECK-LABEL: @test2(
; CHECK-NEXT:    [[T14:%.*]] = call i32 @llvm.bswap.i32(i32 [[ARG:%.*]])
; CHECK-NEXT:    ret i32 [[T14]]
;
  %t2 = shl i32 %arg, 24
  %t4 = shl i32 %arg, 8
  %t5 = and i32 %t4, 16711680
  %t6 = or i32 %t2, %t5
  %t8 = lshr i32 %arg, 8
  %t9 = and i32 %t8, 65280
  %t10 = or i32 %t6, %t9
  %t12 = lshr i32 %arg, 24
  %t14 = or i32 %t10, %t12
  ret i32 %t14
}

define <2 x i32> @test2_vector(<2 x i32> %arg) {
; CHECK-LABEL: @test2_vector(
; CHECK-NEXT:    [[T14:%.*]] = call <2 x i32> @llvm.bswap.v2i32(<2 x i32> [[ARG:%.*]])
; CHECK-NEXT:    ret <2 x i32> [[T14]]
;
  %t2 = shl <2 x i32> %arg, <i32 24, i32 24>
  %t4 = shl <2 x i32> %arg, <i32 8, i32 8>
  %t5 = and <2 x i32> %t4, <i32 16711680, i32 16711680>
  %t6 = or <2 x i32> %t2, %t5
  %t8 = lshr <2 x i32> %arg, <i32 8, i32 8>
  %t9 = and <2 x i32> %t8, <i32 65280, i32 65280>
  %t10 = or <2 x i32> %t6, %t9
  %t12 = lshr <2 x i32> %arg, <i32 24, i32 24>
  %t14 = or <2 x i32> %t10, %t12
  ret <2 x i32> %t14
}

define <2 x i32> @test2_vector_undef(<2 x i32> %arg) {
; CHECK-LABEL: @test2_vector_undef(
; CHECK-NEXT:    [[T2:%.*]] = shl <2 x i32> [[ARG:%.*]], <i32 24, i32 undef>
; CHECK-NEXT:    [[T4:%.*]] = shl <2 x i32> [[ARG]], <i32 8, i32 8>
; CHECK-NEXT:    [[T5:%.*]] = and <2 x i32> [[T4]], <i32 16711680, i32 undef>
; CHECK-NEXT:    [[T6:%.*]] = or <2 x i32> [[T2]], [[T5]]
; CHECK-NEXT:    [[T8:%.*]] = lshr <2 x i32> [[ARG]], <i32 8, i32 8>
; CHECK-NEXT:    [[T9:%.*]] = and <2 x i32> [[T8]], <i32 65280, i32 undef>
; CHECK-NEXT:    [[T10:%.*]] = or <2 x i32> [[T6]], [[T9]]
; CHECK-NEXT:    [[T12:%.*]] = lshr <2 x i32> [[ARG]], <i32 24, i32 undef>
; CHECK-NEXT:    [[T14:%.*]] = or <2 x i32> [[T10]], [[T12]]
; CHECK-NEXT:    ret <2 x i32> [[T14]]
;
  %t2 = shl <2 x i32> %arg, <i32 24, i32 undef>
  %t4 = shl <2 x i32> %arg, <i32 8, i32 8>
  %t5 = and <2 x i32> %t4, <i32 16711680, i32 undef>
  %t6 = or <2 x i32> %t2, %t5
  %t8 = lshr <2 x i32> %arg, <i32 8, i32 8>
  %t9 = and <2 x i32> %t8, <i32 65280, i32 undef>
  %t10 = or <2 x i32> %t6, %t9
  %t12 = lshr <2 x i32> %arg, <i32 24, i32 undef>
  %t14 = or <2 x i32> %t10, %t12
  ret <2 x i32> %t14
}

define i16 @test3(i16 %s) {
; CHECK-LABEL: @test3(
; CHECK-NEXT:    [[T5:%.*]] = call i16 @llvm.bswap.i16(i16 [[S:%.*]])
; CHECK-NEXT:    ret i16 [[T5]]
;
  %t2 = lshr i16 %s, 8
  %t4 = shl i16 %s, 8
  %t5 = or i16 %t2, %t4
  ret i16 %t5
}

define <2 x i16> @test3_vector(<2 x i16> %s) {
; CHECK-LABEL: @test3_vector(
; CHECK-NEXT:    [[T5:%.*]] = call <2 x i16> @llvm.bswap.v2i16(<2 x i16> [[S:%.*]])
; CHECK-NEXT:    ret <2 x i16> [[T5]]
;
  %t2 = lshr <2 x i16> %s, <i16 8, i16 8>
  %t4 = shl <2 x i16> %s, <i16 8, i16 8>
  %t5 = or <2 x i16> %t2, %t4
  ret <2 x i16> %t5
}

define <2 x i16> @test3_vector_undef(<2 x i16> %s) {
; CHECK-LABEL: @test3_vector_undef(
; CHECK-NEXT:    [[T5:%.*]] = call <2 x i16> @llvm.bswap.v2i16(<2 x i16> [[S:%.*]])
; CHECK-NEXT:    ret <2 x i16> [[T5]]
;
  %t2 = lshr <2 x i16> %s, <i16 undef, i16 8>
  %t4 = shl <2 x i16> %s, <i16 8, i16 undef>
  %t5 = or <2 x i16> %t2, %t4
  ret <2 x i16> %t5
}

define i16 @test4(i16 %s) {
; CHECK-LABEL: @test4(
; CHECK-NEXT:    [[T5:%.*]] = call i16 @llvm.bswap.i16(i16 [[S:%.*]])
; CHECK-NEXT:    ret i16 [[T5]]
;
  %t2 = lshr i16 %s, 8
  %t4 = shl i16 %s, 8
  %t5 = or i16 %t4, %t2
  ret i16 %t5
}

define <2 x i16> @test4_vector(<2 x i16> %s) {
; CHECK-LABEL: @test4_vector(
; CHECK-NEXT:    [[T5:%.*]] = call <2 x i16> @llvm.bswap.v2i16(<2 x i16> [[S:%.*]])
; CHECK-NEXT:    ret <2 x i16> [[T5]]
;
  %t2 = lshr <2 x i16> %s, <i16 8, i16 8>
  %t4 = shl <2 x i16> %s, <i16 8, i16 8>
  %t5 = or <2 x i16> %t4, %t2
  ret <2 x i16> %t5
}

define i16 @test5(i16 %a) {
; CHECK-LABEL: @test5(
; CHECK-NEXT:    [[T_UPGRD_3:%.*]] = call i16 @llvm.bswap.i16(i16 [[A:%.*]])
; CHECK-NEXT:    ret i16 [[T_UPGRD_3]]
;
  %t = zext i16 %a to i32
  %t1 = and i32 %t, 65280
  %t2 = ashr i32 %t1, 8
  %t2.upgrd.1 = trunc i32 %t2 to i16
  %t4 = and i32 %t, 255
  %t5 = shl i32 %t4, 8
  %t5.upgrd.2 = trunc i32 %t5 to i16
  %t.upgrd.3 = or i16 %t2.upgrd.1, %t5.upgrd.2
  %t6 = bitcast i16 %t.upgrd.3 to i16
  %t6.upgrd.4 = zext i16 %t6 to i32
  %retval = trunc i32 %t6.upgrd.4 to i16
  ret i16 %retval
}

define <2 x i16> @test5_vector(<2 x i16> %a) {
; CHECK-LABEL: @test5_vector(
; CHECK-NEXT:    [[T_UPGRD_3:%.*]] = call <2 x i16> @llvm.bswap.v2i16(<2 x i16> [[A:%.*]])
; CHECK-NEXT:    ret <2 x i16> [[T_UPGRD_3]]
;
  %t = zext <2 x i16> %a to <2 x i32>
  %t1 = and <2 x i32> %t, <i32 65280, i32 65280>
  %t2 = ashr <2 x i32> %t1, <i32 8, i32 8>
  %t2.upgrd.1 = trunc <2 x i32> %t2 to <2 x i16>
  %t4 = and <2 x i32> %t, <i32 255, i32 255>
  %t5 = shl <2 x i32> %t4, <i32 8, i32 8>
  %t5.upgrd.2 = trunc <2 x i32> %t5 to <2 x i16>
  %t.upgrd.3 = or <2 x i16> %t2.upgrd.1, %t5.upgrd.2
  %t6 = bitcast <2 x i16> %t.upgrd.3 to <2 x i16>
  %t6.upgrd.4 = zext <2 x i16> %t6 to <2 x i32>
  %retval = trunc <2 x i32> %t6.upgrd.4 to <2 x i16>
  ret <2 x i16> %retval
}

; PR2842
define i32 @test6(i32 %x) nounwind readnone {
; CHECK-LABEL: @test6(
; CHECK-NEXT:    [[T7:%.*]] = call i32 @llvm.bswap.i32(i32 [[X:%.*]])
; CHECK-NEXT:    ret i32 [[T7]]
;
  %t = shl i32 %x, 16
  %x.mask = and i32 %x, 65280
  %t1 = lshr i32 %x, 16
  %t2 = and i32 %t1, 255
  %t3 = or i32 %x.mask, %t
  %t4 = or i32 %t3, %t2
  %t5 = shl i32 %t4, 8
  %t6 = lshr i32 %x, 24
  %t7 = or i32 %t5, %t6
  ret i32 %t7
}

define <2 x i32> @test6_vector(<2 x i32> %x) nounwind readnone {
; CHECK-LABEL: @test6_vector(
; CHECK-NEXT:    [[T7:%.*]] = call <2 x i32> @llvm.bswap.v2i32(<2 x i32> [[X:%.*]])
; CHECK-NEXT:    ret <2 x i32> [[T7]]
;
  %t = shl <2 x i32> %x, <i32 16, i32 16>
  %x.mask = and <2 x i32> %x, <i32 65280, i32 65280>
  %t1 = lshr <2 x i32> %x, <i32 16, i32 16>
  %t2 = and <2 x i32> %t1, <i32 255, i32 255>
  %t3 = or <2 x i32> %x.mask, %t
  %t4 = or <2 x i32> %t3, %t2
  %t5 = shl <2 x i32> %t4, <i32 8, i32 8>
  %t6 = lshr <2 x i32> %x, <i32 24, i32 24>
  %t7 = or <2 x i32> %t5, %t6
  ret <2 x i32> %t7
}

declare void @extra_use(i32)

; swaphalf = (x << 16 | x >> 16)
; ((swaphalf & 0x00ff00ff) << 8) | ((swaphalf >> 8) & 0x00ff00ff)

define i32 @bswap32_and_first(i32 %x) {
; CHECK-LABEL: @bswap32_and_first(
; CHECK-NEXT:    [[BSWAP:%.*]] = call i32 @llvm.bswap.i32(i32 [[X:%.*]])
; CHECK-NEXT:    ret i32 [[BSWAP]]
;
  %shl = shl i32 %x, 16
  %shr = lshr i32 %x, 16
  %swaphalf = or i32 %shl, %shr
  %t = and i32 %swaphalf, 16711935
  %tshl = shl nuw i32 %t, 8
  %b = lshr i32 %swaphalf, 8
  %band = and i32 %b, 16711935
  %bswap = or i32 %tshl, %band
  ret i32 %bswap
}

; Extra use should not prevent matching to bswap.
; swaphalf = (x << 16 | x >> 16)
; ((swaphalf & 0x00ff00ff) << 8) | ((swaphalf >> 8) & 0x00ff00ff)

define i32 @bswap32_and_first_extra_use(i32 %x) {
; CHECK-LABEL: @bswap32_and_first_extra_use(
; CHECK-NEXT:    [[SWAPHALF:%.*]] = call i32 @llvm.fshl.i32(i32 [[X:%.*]], i32 [[X]], i32 16)
; CHECK-NEXT:    [[T:%.*]] = and i32 [[SWAPHALF]], 16711935
; CHECK-NEXT:    [[BSWAP:%.*]] = call i32 @llvm.bswap.i32(i32 [[X]])
; CHECK-NEXT:    call void @extra_use(i32 [[T]])
; CHECK-NEXT:    ret i32 [[BSWAP]]
;
  %shl = shl i32 %x, 16
  %shr = lshr i32 %x, 16
  %swaphalf = or i32 %shl, %shr
  %t = and i32 %swaphalf, 16711935
  %tshl = shl nuw i32 %t, 8
  %b = lshr i32 %swaphalf, 8
  %band = and i32 %b, 16711935
  %bswap = or i32 %tshl, %band
  call void @extra_use(i32 %t)
  ret i32 %bswap
}

; swaphalf = (x << 16 | x >> 16)
; ((swaphalf << 8) & 0xff00ff00) | ((swaphalf >> 8) & 0x00ff00ff)

; PR23863
define i32 @bswap32_shl_first(i32 %x) {
; CHECK-LABEL: @bswap32_shl_first(
; CHECK-NEXT:    [[BSWAP:%.*]] = call i32 @llvm.bswap.i32(i32 [[X:%.*]])
; CHECK-NEXT:    ret i32 [[BSWAP]]
;
  %shl = shl i32 %x, 16
  %shr = lshr i32 %x, 16
  %swaphalf = or i32 %shl, %shr
  %t = shl i32 %swaphalf, 8
  %tand = and i32 %t, -16711936
  %b = lshr i32 %swaphalf, 8
  %band = and i32 %b, 16711935
  %bswap = or i32 %tand, %band
  ret i32 %bswap
}

; Extra use should not prevent matching to bswap.
; swaphalf = (x << 16 | x >> 16)
; ((swaphalf << 8) & 0xff00ff00) | ((swaphalf >> 8) & 0x00ff00ff)

define i32 @bswap32_shl_first_extra_use(i32 %x) {
; CHECK-LABEL: @bswap32_shl_first_extra_use(
; CHECK-NEXT:    [[SWAPHALF:%.*]] = call i32 @llvm.fshl.i32(i32 [[X:%.*]], i32 [[X]], i32 16)
; CHECK-NEXT:    [[T:%.*]] = shl i32 [[SWAPHALF]], 8
; CHECK-NEXT:    [[BSWAP:%.*]] = call i32 @llvm.bswap.i32(i32 [[X]])
; CHECK-NEXT:    call void @extra_use(i32 [[T]])
; CHECK-NEXT:    ret i32 [[BSWAP]]
;
  %shl = shl i32 %x, 16
  %shr = lshr i32 %x, 16
  %swaphalf = or i32 %shl, %shr
  %t = shl i32 %swaphalf, 8
  %tand = and i32 %t, -16711936
  %b = lshr i32 %swaphalf, 8
  %band = and i32 %b, 16711935
  %bswap = or i32 %tand, %band
  call void @extra_use(i32 %t)
  ret i32 %bswap
}

define i16 @test8(i16 %a) {
; CHECK-LABEL: @test8(
; CHECK-NEXT:    [[OR:%.*]] = call i16 @llvm.bswap.i16(i16 [[A:%.*]])
; CHECK-NEXT:    ret i16 [[OR]]
;
  %conv = zext i16 %a to i32
  %shr = lshr i16 %a, 8
  %shl = shl i32 %conv, 8
  %conv1 = zext i16 %shr to i32
  %or = or i32 %conv1, %shl
  %conv2 = trunc i32 %or to i16
  ret i16 %conv2
}

define i16 @test9(i16 %a) {
; CHECK-LABEL: @test9(
; CHECK-NEXT:    [[OR:%.*]] = call i16 @llvm.bswap.i16(i16 [[A:%.*]])
; CHECK-NEXT:    ret i16 [[OR]]
;
  %conv = zext i16 %a to i32
  %shr = lshr i32 %conv, 8
  %shl = shl i32 %conv, 8
  %or = or i32 %shr, %shl
  %conv2 = trunc i32 %or to i16
  ret i16 %conv2
}

define i16 @test10(i32 %a) {
; CHECK-LABEL: @test10(
; CHECK-NEXT:    [[TRUNC:%.*]] = trunc i32 [[A:%.*]] to i16
; CHECK-NEXT:    [[REV:%.*]] = call i16 @llvm.bswap.i16(i16 [[TRUNC]])
; CHECK-NEXT:    ret i16 [[REV]]
;
  %shr1 = lshr i32 %a, 8
  %and1 = and i32 %shr1, 255
  %and2 = shl i32 %a, 8
  %shl1 = and i32 %and2, 65280
  %or = or i32 %and1, %shl1
  %conv = trunc i32 %or to i16
  ret i16 %conv
}

define <2 x i16> @test10_vector(<2 x i32> %a) {
; CHECK-LABEL: @test10_vector(
; CHECK-NEXT:    [[TRUNC:%.*]] = trunc <2 x i32> [[A:%.*]] to <2 x i16>
; CHECK-NEXT:    [[REV:%.*]] = call <2 x i16> @llvm.bswap.v2i16(<2 x i16> [[TRUNC]])
; CHECK-NEXT:    ret <2 x i16> [[REV]]
;
  %shr1 = lshr <2 x i32> %a, <i32 8, i32 8>
  %and1 = and <2 x i32> %shr1, <i32 255, i32 255>
  %and2 = shl <2 x i32> %a, <i32 8, i32 8>
  %shl1 = and <2 x i32> %and2, <i32 65280, i32 65280>
  %or = or <2 x i32> %and1, %shl1
  %conv = trunc <2 x i32> %or to <2 x i16>
  ret <2 x i16> %conv
}

define i64 @PR39793_bswap_u64_as_u32(i64 %0) {
; CHECK-LABEL: @PR39793_bswap_u64_as_u32(
; CHECK-NEXT:    [[TRUNC:%.*]] = trunc i64 [[TMP0:%.*]] to i32
; CHECK-NEXT:    [[REV:%.*]] = call i32 @llvm.bswap.i32(i32 [[TRUNC]])
; CHECK-NEXT:    [[TMP2:%.*]] = zext i32 [[REV]] to i64
; CHECK-NEXT:    ret i64 [[TMP2]]
;
  %2 = lshr i64 %0, 24
  %3 = and i64 %2, 255
  %4 = lshr i64 %0, 8
  %5 = and i64 %4, 65280
  %6 = or i64 %3, %5
  %7 = shl i64 %0, 8
  %8 = and i64 %7, 16711680
  %9 = or i64 %6, %8
  %10 = shl i64 %0, 24
  %11 = and i64 %10, 4278190080
  %12 = or i64 %9, %11
  ret i64 %12
}

define i16 @PR39793_bswap_u64_as_u32_trunc(i64 %0) {
; CHECK-LABEL: @PR39793_bswap_u64_as_u32_trunc(
; CHECK-NEXT:    [[TRUNC:%.*]] = trunc i64 [[TMP0:%.*]] to i32
; CHECK-NEXT:    [[REV:%.*]] = call i32 @llvm.bswap.i32(i32 [[TRUNC]])
; CHECK-NEXT:    [[TMP2:%.*]] = trunc i32 [[REV]] to i16
; CHECK-NEXT:    ret i16 [[TMP2]]
;
  %2 = lshr i64 %0, 24
  %3 = and i64 %2, 255
  %4 = lshr i64 %0, 8
  %5 = and i64 %4, 65280
  %6 = or i64 %3, %5
  %7 = shl i64 %0, 8
  %8 = and i64 %7, 16711680
  %9 = or i64 %6, %8
  %10 = shl i64 %0, 24
  %11 = and i64 %10, 4278190080
  %12 = or i64 %9, %11
  %13 = trunc i64 %12 to i16
  ret i16 %13
}

define i64 @PR39793_bswap_u64_as_u16(i64 %0) {
; CHECK-LABEL: @PR39793_bswap_u64_as_u16(
; CHECK-NEXT:    [[TRUNC:%.*]] = trunc i64 [[TMP0:%.*]] to i16
; CHECK-NEXT:    [[REV:%.*]] = call i16 @llvm.bswap.i16(i16 [[TRUNC]])
; CHECK-NEXT:    [[TMP2:%.*]] = zext i16 [[REV]] to i64
; CHECK-NEXT:    ret i64 [[TMP2]]
;
  %2 = lshr i64 %0, 8
  %3 = and i64 %2, 255
  %4 = shl i64 %0, 8
  %5 = and i64 %4, 65280
  %6 = or i64 %3, %5
  ret i64 %6
}

define <2 x i64> @PR39793_bswap_u64_as_u16_vector(<2 x i64> %0) {
; CHECK-LABEL: @PR39793_bswap_u64_as_u16_vector(
; CHECK-NEXT:    [[TRUNC:%.*]] = trunc <2 x i64> [[TMP0:%.*]] to <2 x i16>
; CHECK-NEXT:    [[REV:%.*]] = call <2 x i16> @llvm.bswap.v2i16(<2 x i16> [[TRUNC]])
; CHECK-NEXT:    [[TMP2:%.*]] = zext <2 x i16> [[REV]] to <2 x i64>
; CHECK-NEXT:    ret <2 x i64> [[TMP2]]
;
  %2 = lshr <2 x i64> %0, <i64 8, i64 8>
  %3 = and <2 x i64> %2, <i64 255, i64 255>
  %4 = shl <2 x i64> %0, <i64 8, i64 8>
  %5 = and <2 x i64> %4, <i64 65280, i64 65280>
  %6 = or <2 x i64> %3, %5
  ret <2 x i64> %6
}

define i8 @PR39793_bswap_u64_as_u16_trunc(i64 %0) {
; CHECK-LABEL: @PR39793_bswap_u64_as_u16_trunc(
; CHECK-NEXT:    [[REV1:%.*]] = lshr i64 [[TMP0:%.*]], 8
; CHECK-NEXT:    [[TMP2:%.*]] = trunc i64 [[REV1]] to i8
; CHECK-NEXT:    ret i8 [[TMP2]]
;
  %2 = lshr i64 %0, 8
  %3 = and i64 %2, 255
  %4 = shl i64 %0, 8
  %5 = and i64 %4, 65280
  %6 = or i64 %3, %5
  %7 = trunc i64 %6 to i8
  ret i8 %7
}

define i50 @PR39793_bswap_u50_as_u16(i50 %0) {
; CHECK-LABEL: @PR39793_bswap_u50_as_u16(
; CHECK-NEXT:    [[TRUNC:%.*]] = trunc i50 [[TMP0:%.*]] to i16
; CHECK-NEXT:    [[REV:%.*]] = call i16 @llvm.bswap.i16(i16 [[TRUNC]])
; CHECK-NEXT:    [[TMP2:%.*]] = zext i16 [[REV]] to i50
; CHECK-NEXT:    ret i50 [[TMP2]]
;
  %2 = lshr i50 %0, 8
  %3 = and i50 %2, 255
  %4 = shl i50 %0, 8
  %5 = and i50 %4, 65280
  %6 = or i50 %3, %5
  ret i50 %6
}

define i32 @PR39793_bswap_u32_as_u16(i32 %0) {
; CHECK-LABEL: @PR39793_bswap_u32_as_u16(
; CHECK-NEXT:    [[TRUNC:%.*]] = trunc i32 [[TMP0:%.*]] to i16
; CHECK-NEXT:    [[REV:%.*]] = call i16 @llvm.bswap.i16(i16 [[TRUNC]])
; CHECK-NEXT:    [[TMP2:%.*]] = zext i16 [[REV]] to i32
; CHECK-NEXT:    ret i32 [[TMP2]]
;
  %2 = lshr i32 %0, 8
  %3 = and i32 %2, 255
  %4 = shl i32 %0, 8
  %5 = and i32 %4, 65280
  %6 = or i32 %3, %5
  ret i32 %6
}

define i8 @PR39793_bswap_u32_as_u16_trunc(i32 %0) {
; CHECK-LABEL: @PR39793_bswap_u32_as_u16_trunc(
; CHECK-NEXT:    [[REV1:%.*]] = lshr i32 [[TMP0:%.*]], 8
; CHECK-NEXT:    [[TMP2:%.*]] = trunc i32 [[REV1]] to i8
; CHECK-NEXT:    ret i8 [[TMP2]]
;
  %2 = lshr i32 %0, 8
  %3 = and i32 %2, 255
  %4 = shl i32 %0, 8
  %5 = and i32 %4, 65280
  %6 = or i32 %3, %5
  %7 = trunc i32 %6 to i8
  ret i8 %7
}

define i32 @partial_bswap(i32 %x) {
; CHECK-LABEL: @partial_bswap(
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.bswap.i32(i32 [[X:%.*]])
; CHECK-NEXT:    ret i32 [[TMP1]]
;
  %x3 = shl i32 %x, 24
  %a2 = shl i32 %x, 8
  %x2 = and i32 %a2, 16711680
  %x32 = or i32 %x3, %x2
  %t1 = and i32 %x, -65536
  %t2 = call i32 @llvm.bswap.i32(i32 %t1)
  %r = or i32 %x32, %t2
  ret i32 %r
}
declare i32 @llvm.bswap.i32(i32)

define <2 x i32> @partial_bswap_vector(<2 x i32> %x) {
; CHECK-LABEL: @partial_bswap_vector(
; CHECK-NEXT:    [[TMP1:%.*]] = call <2 x i32> @llvm.bswap.v2i32(<2 x i32> [[X:%.*]])
; CHECK-NEXT:    ret <2 x i32> [[TMP1]]
;
  %x3 = shl <2 x i32> %x, <i32 24, i32 24>
  %a2 = shl <2 x i32> %x, <i32 8, i32 8>
  %x2 = and <2 x i32> %a2, <i32 16711680, i32 16711680>
  %x32 = or <2 x i32> %x3, %x2
  %t1 = and <2 x i32> %x, <i32 -65536, i32 -65536>
  %t2 = call <2 x i32> @llvm.bswap.v2i32(<2 x i32> %t1)
  %r = or <2 x i32> %x32, %t2
  ret <2 x i32> %r
}
declare <2 x i32> @llvm.bswap.v2i32(<2 x i32>)

define i16 @partial_bitreverse(i16 %x) {
; CHECK-LABEL: @partial_bitreverse(
; CHECK-NEXT:    [[OR:%.*]] = call i16 @llvm.bswap.i16(i16 [[X:%.*]])
; CHECK-NEXT:    ret i16 [[OR]]
;
  %rev= call i16 @llvm.bitreverse.i16(i16 %x)
  %lo = and i16 %rev, 255
  %hi = and i16 %rev, -256
  %revlo = call i16 @llvm.bitreverse.i16(i16 %lo)
  %revhi = call i16 @llvm.bitreverse.i16(i16 %hi)
  %newlo = lshr i16 %revlo, 8
  %newhi = shl  i16 %revhi, 8
  %or = or i16 %newlo, %newhi
  ret i16 %or
}
declare i16 @llvm.bitreverse.i16(i16)

define i64 @bswap_and_mask_0(i64 %0) {
; CHECK-LABEL: @bswap_and_mask_0(
; CHECK-NEXT:    [[TMP2:%.*]] = and i64 [[TMP0:%.*]], -72057594037927681
; CHECK-NEXT:    [[TMP3:%.*]] = call i64 @llvm.bswap.i64(i64 [[TMP2]])
; CHECK-NEXT:    ret i64 [[TMP3]]
;
  %2 = lshr i64 %0, 56
  %3 = shl i64 %0, 56
  %4 = or i64 %2, %3
  ret i64 %4
}

define i64 @bswap_and_mask_1(i64 %0) {
; CHECK-LABEL: @bswap_and_mask_1(
; CHECK-NEXT:    [[TMP2:%.*]] = lshr i64 [[TMP0:%.*]], 56
; CHECK-NEXT:    [[TMP3:%.*]] = lshr i64 [[TMP0]], 40
; CHECK-NEXT:    [[TMP4:%.*]] = and i64 [[TMP3]], 65280
; CHECK-NEXT:    [[TMP5:%.*]] = or i64 [[TMP4]], [[TMP2]]
; CHECK-NEXT:    ret i64 [[TMP5]]
;
  %2 = lshr i64 %0, 56
  %3 = lshr i64 %0, 40
  %4 = and i64 %3, 65280
  %5 = or i64 %4, %2
  ret i64 %5
}

define i64 @bswap_and_mask_2(i64 %0) {
; CHECK-LABEL: @bswap_and_mask_2(
; CHECK-NEXT:    [[TMP2:%.*]] = and i64 [[TMP0:%.*]], -72057594037862401
; CHECK-NEXT:    [[TMP3:%.*]] = call i64 @llvm.bswap.i64(i64 [[TMP2]])
; CHECK-NEXT:    ret i64 [[TMP3]]
;
  %2 = lshr i64 %0, 56
  %3 = shl i64 %0, 56
  %4 = or i64 %2, %3
  %5 = shl i64 %0, 40
  %6 = and i64 %5, 71776119061217280
  %7 = or i64 %4, %6
  ret i64 %7
}

define i64 @bswap_trunc(i64 %x01234567) {
; CHECK-LABEL: @bswap_trunc(
; CHECK-NEXT:    [[X76543210:%.*]] = call i64 @llvm.bswap.i64(i64 [[X01234567:%.*]])
; CHECK-NEXT:    ret i64 [[X76543210]]
;
  %x7zzzzzzz = shl i64 %x01234567, 56
  %xz0123456 = lshr i64 %x01234567, 8
  %xzzzzz012 = lshr i64 %x01234567, 40
  %x3456 = trunc i64 %xz0123456 to i32
  %xz012 = trunc i64 %xzzzzz012 to i32
  %x6543 = call i32 @llvm.bswap.i32(i32 %x3456)
  %x210z = call i32 @llvm.bswap.i32(i32 %xz012)
  %xz210 = lshr i32 %x210z, 8
  %xzzzz6543 = zext i32 %x6543 to i64
  %xzzzzz210 = zext i32 %xz210 to i64
  %xz6543zzz = shl i64 %xzzzz6543, 24
  %xz6543210 = or i64 %xzzzzz210, %xz6543zzz
  %x76543210 = or i64 %xz6543210, %x7zzzzzzz
  ret i64 %x76543210
}

define i32 @shuf_4bytes(<4 x i8> %x) {
; CHECK-LABEL: @shuf_4bytes(
; CHECK-NEXT:    [[TMP1:%.*]] = bitcast <4 x i8> [[X:%.*]] to i32
; CHECK-NEXT:    [[CAST:%.*]] = call i32 @llvm.bswap.i32(i32 [[TMP1]])
; CHECK-NEXT:    ret i32 [[CAST]]
;
  %bswap = shufflevector <4 x i8> %x, <4 x i8> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
  %cast = bitcast <4 x i8> %bswap to i32
  ret i32 %cast
}

define i32 @shuf_load_4bytes(<4 x i8>* %p) {
; CHECK-LABEL: @shuf_load_4bytes(
; CHECK-NEXT:    [[TMP1:%.*]] = bitcast <4 x i8>* [[P:%.*]] to i32*
; CHECK-NEXT:    [[X1:%.*]] = load i32, i32* [[TMP1]], align 4
; CHECK-NEXT:    [[CAST:%.*]] = call i32 @llvm.bswap.i32(i32 [[X1]])
; CHECK-NEXT:    ret i32 [[CAST]]
;
  %x = load <4 x i8>, <4 x i8>* %p
  %bswap = shufflevector <4 x i8> %x, <4 x i8> undef, <4 x i32> <i32 3, i32 2, i32 undef, i32 0>
  %cast = bitcast <4 x i8> %bswap to i32
  ret i32 %cast
}

define i32 @shuf_bitcast_twice_4bytes(i32 %x) {
; CHECK-LABEL: @shuf_bitcast_twice_4bytes(
; CHECK-NEXT:    [[CAST2:%.*]] = call i32 @llvm.bswap.i32(i32 [[X:%.*]])
; CHECK-NEXT:    ret i32 [[CAST2]]
;
  %cast1 = bitcast i32 %x to <4 x i8>
  %bswap = shufflevector <4 x i8> %cast1, <4 x i8> undef, <4 x i32> <i32 undef, i32 2, i32 1, i32 0>
  %cast2 = bitcast <4 x i8> %bswap to i32
  ret i32 %cast2
}

; Negative test - extra use
declare void @use(<4 x i8>)

define i32 @shuf_4bytes_extra_use(<4 x i8> %x) {
; CHECK-LABEL: @shuf_4bytes_extra_use(
; CHECK-NEXT:    [[BSWAP:%.*]] = shufflevector <4 x i8> [[X:%.*]], <4 x i8> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT:    call void @use(<4 x i8> [[BSWAP]])
; CHECK-NEXT:    [[CAST:%.*]] = bitcast <4 x i8> [[BSWAP]] to i32
; CHECK-NEXT:    ret i32 [[CAST]]
;
  %bswap = shufflevector <4 x i8> %x, <4 x i8> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
  call void @use(<4 x i8> %bswap)
  %cast = bitcast <4 x i8> %bswap to i32
  ret i32 %cast
}

; Negative test - scalar type is not in the data layout

define i128 @shuf_16bytes(<16 x i8> %x) {
; CHECK-LABEL: @shuf_16bytes(
; CHECK-NEXT:    [[BSWAP:%.*]] = shufflevector <16 x i8> [[X:%.*]], <16 x i8> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
; CHECK-NEXT:    [[CAST:%.*]] = bitcast <16 x i8> [[BSWAP]] to i128
; CHECK-NEXT:    ret i128 [[CAST]]
;
  %bswap = shufflevector <16 x i8> %x, <16 x i8> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
  %cast = bitcast <16 x i8> %bswap to i128
  ret i128 %cast
}

; Negative test - don't touch widening shuffles (for now)

define i32 @shuf_2bytes_widening(<2 x i8> %x) {
; CHECK-LABEL: @shuf_2bytes_widening(
; CHECK-NEXT:    [[BSWAP:%.*]] = shufflevector <2 x i8> [[X:%.*]], <2 x i8> undef, <4 x i32> <i32 1, i32 0, i32 undef, i32 undef>
; CHECK-NEXT:    [[CAST:%.*]] = bitcast <4 x i8> [[BSWAP]] to i32
; CHECK-NEXT:    ret i32 [[CAST]]
;
  %bswap = shufflevector <2 x i8> %x, <2 x i8> undef, <4 x i32> <i32 1, i32 0, i32 undef, i32 undef>
  %cast = bitcast <4 x i8> %bswap to i32
  ret i32 %cast
}

declare i32 @llvm.fshl.i32(i32, i32, i32)
declare i32 @llvm.fshr.i32(i32, i32, i32)

define i32 @funnel_unary(i32 %abcd) {
; CHECK-LABEL: @funnel_unary(
; CHECK-NEXT:    [[DCBA:%.*]] = call i32 @llvm.bswap.i32(i32 [[ABCD:%.*]])
; CHECK-NEXT:    ret i32 [[DCBA]]
;
  %dabc = call i32 @llvm.fshl.i32(i32 %abcd, i32 %abcd, i32 24)
  %bcda = call i32 @llvm.fshr.i32(i32 %abcd, i32 %abcd, i32 24)
  %dzbz = and i32 %dabc, -16711936
  %zcza = and i32 %bcda,  16711935
  %dcba = or i32 %dzbz, %zcza
  ret i32 %dcba
}

define i32 @funnel_binary(i32 %abcd) {
; CHECK-LABEL: @funnel_binary(
; CHECK-NEXT:    [[DCBA:%.*]] = call i32 @llvm.bswap.i32(i32 [[ABCD:%.*]])
; CHECK-NEXT:    ret i32 [[DCBA]]
;
  %cdzz = shl i32 %abcd, 16
  %dcdz = call i32 @llvm.fshl.i32(i32 %abcd, i32 %cdzz, i32 24)
  %zzab = lshr i32 %abcd, 16
  %zaba = call i32 @llvm.fshr.i32(i32 %zzab, i32 %abcd, i32 24)
  %dczz = and i32 %dcdz, -65536
  %zzba = and i32 %zaba,  65535
  %dcba = or i32 %dczz, %zzba
  ret i32 %dcba
}

define i32 @funnel_and(i32 %abcd) {
; CHECK-LABEL: @funnel_and(
; CHECK-NEXT:    [[DCBA:%.*]] = call i32 @llvm.bswap.i32(i32 [[ABCD:%.*]])
; CHECK-NEXT:    ret i32 [[DCBA]]
;
  %zzcz = and i32 %abcd, 65280
  %zcza = call i32 @llvm.fshl.i32(i32 %zzcz, i32 %abcd, i32 8)
  %zbzz = and i32 %abcd, 16711680
  %dzbz = call i32 @llvm.fshl.i32(i32 %abcd, i32 %zbzz, i32 24)
  %dcba = or i32 %zcza, %dzbz
  ret i32 %dcba
}

; Don't attempt to collectBitParts from >128 bit integers
define i16 @trunc_bswap_i160(i160* %a0) {
; CHECK-LABEL: @trunc_bswap_i160(
; CHECK-NEXT:    [[LOAD:%.*]] = load i160, i160* [[A0:%.*]], align 4
; CHECK-NEXT:    [[LSHR1:%.*]] = lshr i160 [[LOAD]], 136
; CHECK-NEXT:    [[CAST1:%.*]] = trunc i160 [[LSHR1]] to i16
; CHECK-NEXT:    [[AND1:%.*]] = and i16 [[CAST1]], 255
; CHECK-NEXT:    [[TMP1:%.*]] = lshr i160 [[LOAD]], 120
; CHECK-NEXT:    [[TMP2:%.*]] = trunc i160 [[TMP1]] to i16
; CHECK-NEXT:    [[SHL:%.*]] = and i16 [[TMP2]], -256
; CHECK-NEXT:    [[OR:%.*]] = or i16 [[AND1]], [[SHL]]
; CHECK-NEXT:    ret i16 [[OR]]
;
  %load = load i160, i160* %a0, align 4
  %lshr0 = lshr i160 %load, 128
  %lshr1 = lshr i160 %load, 136
  %cast0 = trunc i160 %lshr0 to i16
  %cast1 = trunc i160 %lshr1 to i16
  %and0 = and i16 %cast0, 255
  %and1 = and i16 %cast1, 255
  %shl = shl i16 %and0, 8
  %or = or i16 %and1, %shl
  ret i16 %or
}

; PR47191 - deep IR trees prevent ADD/XOR instructions being simplified to OR.

define i64 @PR47191_problem1(i64 %0) {
; CHECK-LABEL: @PR47191_problem1(
; CHECK-NEXT:    [[TMP2:%.*]] = call i64 @llvm.bswap.i64(i64 [[TMP0:%.*]])
; CHECK-NEXT:    ret i64 [[TMP2]]
;
  %2 = lshr i64 %0, 56
  %3 = lshr i64 %0, 40
  %4 = and i64 %3, 65280
  %5 = lshr i64 %0, 24
  %6 = and i64 %5, 16711680
  %7 = lshr i64 %0, 8
  %8 = and i64 %7, 4278190080
  %9 = shl i64 %0, 56
  %10 = shl i64 %0, 40
  %11 = and i64 %10, 71776119061217280
  %12 = shl i64 %0, 24
  %13 = and i64 %12, 280375465082880
  %14 = or i64 %9, %2
  %15 = or i64 %14, %4
  %16 = or i64 %15, %6
  %17 = or i64 %16, %8
  %18 = or i64 %17, %11
  %19 = or i64 %18, %13
  %20 = shl i64 %0, 8
  %21 = and i64 %20, 1095216660480
  %22 = add i64 %19, %21
  ret i64 %22
}

define i64 @PR47191_problem2(i64 %0) {
; CHECK-LABEL: @PR47191_problem2(
; CHECK-NEXT:    [[TMP2:%.*]] = call i64 @llvm.bswap.i64(i64 [[TMP0:%.*]])
; CHECK-NEXT:    ret i64 [[TMP2]]
;
  %2 = lshr i64 %0, 56
  %3 = lshr i64 %0, 40
  %4 = and i64 %3, 65280
  %5 = lshr i64 %0, 24
  %6 = and i64 %5, 16711680
  %7 = lshr i64 %0, 8
  %8 = and i64 %7, 4278190080
  %9 = shl i64 %0, 56
  %10 = shl i64 %0, 40
  %11 = and i64 %10, 71776119061217280
  %12 = or i64 %9, %2
  %13 = or i64 %12, %4
  %14 = or i64 %13, %6
  %15 = or i64 %14, %8
  %16 = or i64 %15, %11
  %17 = shl i64 %0, 24
  %18 = and i64 %17, 280375465082880
  %19 = shl i64 %0, 8
  %20 = and i64 %19, 1095216660480
  %21 = or i64 %20, %18
  %22 = xor i64 %21, %16
  ret i64 %22
}

define i64 @PR47191_problem3(i64 %0) {
; CHECK-LABEL: @PR47191_problem3(
; CHECK-NEXT:    [[TMP2:%.*]] = call i64 @llvm.bswap.i64(i64 [[TMP0:%.*]])
; CHECK-NEXT:    ret i64 [[TMP2]]
;
  %2 = lshr i64 %0, 56
  %3 = lshr i64 %0, 40
  %4 = and i64 %3, 65280
  %5 = lshr i64 %0, 24
  %6 = and i64 %5, 16711680
  %7 = lshr i64 %0, 8
  %8 = and i64 %7, 4278190080
  %9 = shl i64 %0, 56
  %10 = shl i64 %0, 40
  %11 = and i64 %10, 71776119061217280
  %12 = or i64 %9, %2
  %13 = or i64 %12, %4
  %14 = or i64 %13, %6
  %15 = or i64 %14, %8
  %16 = or i64 %15, %11
  %17 = shl i64 %0, 24
  %18 = and i64 %17, 280375465082880
  %19 = shl i64 %0, 8
  %20 = and i64 %19, 1095216660480
  %21 = or i64 %20, %18
  %22 = xor i64 %21, %16
  ret i64 %22
}

define i64 @PR47191_problem4(i64 %0) {
; CHECK-LABEL: @PR47191_problem4(
; CHECK-NEXT:    [[TMP2:%.*]] = call i64 @llvm.bswap.i64(i64 [[TMP0:%.*]])
; CHECK-NEXT:    ret i64 [[TMP2]]
;
  %2 = lshr i64 %0, 56
  %3 = shl i64 %0, 56
  %4 = or i64 %2, %3
  %5 = lshr i64 %0, 40
  %6 = and i64 %5, 65280
  %7 = or i64 %4, %6
  %8 = shl i64 %0, 40
  %9 = and i64 %8, 71776119061217280
  %10 = or i64 %7, %9
  %11 = lshr i64 %0, 24
  %12 = and i64 %11, 16711680
  %13 = or i64 %10, %12
  %14 = shl i64 %0, 24
  %15 = and i64 %14, 280375465082880
  %16 = or i64 %13, %15
  %17 = lshr i64 %0, 8
  %18 = and i64 %17, 4278190080
  %19 = or i64 %16, %18
  %20 = shl i64 %0, 8
  %21 = and i64 %20, 1095216660480
  %22 = add i64 %19, %21
  ret i64 %22
}