TheRock/compiler/amd-llvm/llvm/test/Transforms/InstCombine/and-xor-merge.ll

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

; (x&z) ^ (y&z) -> (x^y)&z
define i32 @test1(i32 %x, i32 %y, i32 %z) {
; CHECK-LABEL: @test1(
; CHECK-NEXT:    [[T61:%.*]] = xor i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    [[T7:%.*]] = and i32 [[Z:%.*]], [[T61]]
; CHECK-NEXT:    ret i32 [[T7]]
;
  %t3 = and i32 %z, %x
  %t6 = and i32 %z, %y
  %t7 = xor i32 %t3, %t6
  ret i32 %t7
}

; (x & y) ^ (x|y) -> x^y
define i32 @test2(i32 %x, i32 %y, i32 %z) {
; CHECK-LABEL: @test2(
; CHECK-NEXT:    [[T7:%.*]] = xor i32 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    ret i32 [[T7]]
;
  %t3 = and i32 %y, %x
  %t6 = or i32 %y, %x
  %t7 = xor i32 %t3, %t6
  ret i32 %t7
}

define i32 @PR38781(i32 %a, i32 %b) {
; CHECK-LABEL: @PR38781(
; CHECK-NEXT:    [[TMP1:%.*]] = or i32 [[B:%.*]], [[A:%.*]]
; CHECK-NEXT:    [[AND2:%.*]] = icmp sgt i32 [[TMP1]], -1
; CHECK-NEXT:    [[AND:%.*]] = zext i1 [[AND2]] to i32
; CHECK-NEXT:    ret i32 [[AND]]
;
  %a.lobit = lshr i32 %a, 31
  %a.lobit.not = xor i32 %a.lobit, 1
  %b.lobit = lshr i32 %b, 31
  %b.lobit.not = xor i32 %b.lobit, 1
  %and = and i32 %b.lobit.not, %a.lobit.not
  ret i32 %and
}

; (a ^ 4) & (a ^ ~4) -> 0
define i32 @PR75692_1(i32 %x) {
; CHECK-LABEL: @PR75692_1(
; CHECK-NEXT:    ret i32 0
;
  %t2 = xor i32 %x, 4
  %t3 = xor i32 %x, -5
  %t4 = and i32 %t2, %t3
  ret i32 %t4
}

; (a ^ 4) & (a ^ 3) is not zero
define i32 @PR75692_2(i32 %x) {
; CHECK-LABEL: @PR75692_2(
; CHECK-NEXT:    [[T2:%.*]] = xor i32 [[X:%.*]], 4
; CHECK-NEXT:    [[T3:%.*]] = xor i32 [[X]], -4
; CHECK-NEXT:    [[T4:%.*]] = and i32 [[T2]], [[T3]]
; CHECK-NEXT:    ret i32 [[T4]]
;
  %t2 = xor i32 %x, 4
  %t3 = xor i32 %x, -4
  %t4 = and i32 %t2, %t3
  ret i32 %t4
}

; (a ^ 4) & (b ^ ~4) is not zero, since a != b is possible
define i32 @PR75692_3(i32 %x, i32 %y) {
; CHECK-LABEL: @PR75692_3(
; CHECK-NEXT:    [[T2:%.*]] = xor i32 [[X:%.*]], 4
; CHECK-NEXT:    [[T3:%.*]] = xor i32 [[Y:%.*]], -5
; CHECK-NEXT:    [[T4:%.*]] = and i32 [[T2]], [[T3]]
; CHECK-NEXT:    ret i32 [[T4]]
;
  %t2 = xor i32 %x, 4
  %t3 = xor i32 %y, -5
  %t4 = and i32 %t2, %t3
  ret i32 %t4
}

; ((X + C) & M) ^ M --> (~C − X) & M
define i8 @add_and_xor_basic(i8 %x) {
; CHECK-LABEL: @add_and_xor_basic(
; CHECK-NEXT:    [[ADD:%.*]] = sub i8 10, [[X:%.*]]
; CHECK-NEXT:    [[AND:%.*]] = and i8 [[ADD]], 15
; CHECK-NEXT:    ret i8 [[AND]]
;
  %add = add i8 %x, 5
  %and = and i8 %add, 15
  %xor = xor i8 %and, 15
  ret i8 %xor
}

define <4 x i32> @add_and_xor_vector_splat(<4 x i32> %x) {
; CHECK-LABEL: @add_and_xor_vector_splat(
; CHECK-NEXT:    [[ADD:%.*]] = sub <4 x i32> splat (i32 53), [[X:%.*]]
; CHECK-NEXT:    [[AND:%.*]] = and <4 x i32> [[ADD]], splat (i32 63)
; CHECK-NEXT:    ret <4 x i32> [[AND]]
;
  %add = add <4 x i32> %x, <i32 10, i32 10, i32 10, i32 10>
  %and = and <4 x i32> %add, <i32 63, i32 63, i32 63, i32 63>
  %xor = xor <4 x i32> %and, <i32 63, i32 63, i32 63, i32 63>
  ret <4 x i32> %xor
}

define i32 @add_and_xor_overflow_addc(i32 %x) {
; CHECK-LABEL: @add_and_xor_overflow_addc(
; CHECK-NEXT:    [[ADD:%.*]] = sub i32 27, [[X:%.*]]
; CHECK-NEXT:    [[AND:%.*]] = and i32 [[ADD]], 31
; CHECK-NEXT:    ret i32 [[AND]]
;
  %add = add i32 %x, 100
  %and = and i32 %add, 31
  %xor = xor i32 %and, 31
  ret i32 %xor
}

define i32 @add_and_xor_negative_addc(i32 %x) {
; CHECK-LABEL: @add_and_xor_negative_addc(
; CHECK-NEXT:    [[ADD:%.*]] = sub i32 1, [[X:%.*]]
; CHECK-NEXT:    [[AND:%.*]] = and i32 [[ADD]], 255
; CHECK-NEXT:    ret i32 [[AND]]
;
  %add = add i32 %x, -2
  %and = and i32 %add, 255
  %xor = xor i32 %and, 255
  ret i32 %xor
}

define i8 @add_and_xor_not_low_mask(i8 %x) {
; CHECK-LABEL: @add_and_xor_not_low_mask(
; CHECK-NEXT:    [[TMP1:%.*]] = sub i8 1, [[X:%.*]]
; CHECK-NEXT:    [[XOR:%.*]] = and i8 [[TMP1]], -18
; CHECK-NEXT:    ret i8 [[XOR]]
;
  %add = add i8 %x, -2
  %and = and i8 %add, 238
  %xor = xor i8 %and, 238
  ret i8 %xor
}

define i8 @add_and_xor_not_low_mask2(i8 %x) {
; CHECK-LABEL: @add_and_xor_not_low_mask2(
; CHECK-NEXT:    [[TMP1:%.*]] = sub i8 1, [[X:%.*]]
; CHECK-NEXT:    [[XOR:%.*]] = and i8 [[TMP1]], 119
; CHECK-NEXT:    ret i8 [[XOR]]
;
  %add = add i8 %x, -2
  %and = and i8 %add, 119
  %xor = xor i8 %and, 119
  ret i8 %xor
}

define i8 @add_and_xor_not_low_mask3(i8 %x) {
; CHECK-LABEL: @add_and_xor_not_low_mask3(
; CHECK-NEXT:    [[TMP1:%.*]] = sub i8 1, [[X:%.*]]
; CHECK-NEXT:    [[XOR:%.*]] = and i8 [[TMP1]], -91
; CHECK-NEXT:    ret i8 [[XOR]]
;
  %add = add i8 %x, -2
  %and = and i8 %add, 165
  %xor = xor i8 %and, 165
  ret i8 %xor
}

define i8 @add_and_xor_not_low_mask4(i8 %x) {
; CHECK-LABEL: @add_and_xor_not_low_mask4(
; CHECK-NEXT:    [[TMP1:%.*]] = sub i8 1, [[X:%.*]]
; CHECK-NEXT:    [[XOR:%.*]] = and i8 [[TMP1]], -86
; CHECK-NEXT:    ret i8 [[XOR]]
;
  %add = add i8 %x, -2
  %and = and i8 %add, 170
  %xor = xor i8 %and, 170
  ret i8 %xor
}

; This test is trasformed to 'xor(and(add x, 11), 15), 15)' and being applied.
define i8 @add_and_xor_sub_op(i8 %x) {
; CHECK-LABEL: @add_and_xor_sub_op(
; CHECK-NEXT:    [[SUB:%.*]] = sub i8 4, [[X:%.*]]
; CHECK-NEXT:    [[AND:%.*]] = and i8 [[SUB]], 15
; CHECK-NEXT:    ret i8 [[AND]]
;
  %sub = sub i8 %x, 5
  %and = and i8 %sub, 15
  %xor = xor i8 %and, 15
  ret i8 %xor
}

; and_xor_mask negative tests

define i8 @neg_add_and_xor_mask_mismatch(i8 %x) {
; CHECK-LABEL: @neg_add_and_xor_mask_mismatch(
; CHECK-NEXT:    [[ADD:%.*]] = add i8 [[X:%.*]], 5
; CHECK-NEXT:    [[AND:%.*]] = and i8 [[ADD]], 15
; CHECK-NEXT:    [[XOR:%.*]] = xor i8 [[AND]], 7
; CHECK-NEXT:    ret i8 [[XOR]]
;
  %add = add i8 %x, 5
  %and = and i8 %add, 15
  %xor = xor i8 %and, 7
  ret i8 %xor
}

define i8 @neg_add_and_xor_multi_use(i8 %x) {
; CHECK-LABEL: @neg_add_and_xor_multi_use(
; CHECK-NEXT:    [[ADD:%.*]] = add i8 [[X:%.*]], 5
; CHECK-NEXT:    call void @use(i8 [[ADD]])
; CHECK-NEXT:    [[AND:%.*]] = and i8 [[ADD]], 15
; CHECK-NEXT:    [[XOR:%.*]] = xor i8 [[AND]], 15
; CHECK-NEXT:    ret i8 [[XOR]]
;
  %add = add i8 %x, 5
  call void @use(i8 %add)
  %and = and i8 %add, 15
  %xor = xor i8 %and, 15
  ret i8 %xor
}

declare void @use(i8)