llvm-project/llvm/test/Transforms/InstCombine/xor.ll

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

@G1 = global i32 0
@G2 = global i32 0

define i1 @test0(i1 %A) {
; CHECK-LABEL: @test0(
; CHECK-NEXT:    ret i1 %A
;
  %B = xor i1 %A, false
  ret i1 %B
}

define i32 @test1(i32 %A) {
; CHECK-LABEL: @test1(
; CHECK-NEXT:    ret i32 %A
;
  %B = xor i32 %A, 0
  ret i32 %B
}

define i1 @test2(i1 %A) {
; CHECK-LABEL: @test2(
; CHECK-NEXT:    ret i1 false
;
  %B = xor i1 %A, %A
  ret i1 %B
}

define i32 @test3(i32 %A) {
; CHECK-LABEL: @test3(
; CHECK-NEXT:    ret i32 0
;
  %B = xor i32 %A, %A
  ret i32 %B
}

define i32 @test4(i32 %A) {
; CHECK-LABEL: @test4(
; CHECK-NEXT:    ret i32 -1
;
  %NotA = xor i32 -1, %A
  %B = xor i32 %A, %NotA
  ret i32 %B
}

define i32 @test5(i32 %A) {
; CHECK-LABEL: @test5(
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 %A, -124
; CHECK-NEXT:    ret i32 [[TMP1]]
;
  %t1 = or i32 %A, 123
  %r = xor i32 %t1, 123
  ret i32 %r
}

define i8 @test6(i8 %A) {
; CHECK-LABEL: @test6(
; CHECK-NEXT:    ret i8 %A
;
  %B = xor i8 %A, 17
  %C = xor i8 %B, 17
  ret i8 %C
}

define i32 @test7(i32 %A, i32 %B) {
; CHECK-LABEL: @test7(
; CHECK-NEXT:    [[A1:%.*]] = and i32 %A, 7
; CHECK-NEXT:    [[B1:%.*]] = and i32 %B, 128
; CHECK-NEXT:    [[C11:%.*]] = or i32 [[A1]], [[B1]]
; CHECK-NEXT:    ret i32 [[C11]]
;
  %A1 = and i32 %A, 7
  %B1 = and i32 %B, 128
  %C1 = xor i32 %A1, %B1
  ret i32 %C1
}

define i8 @test8(i1 %c) {
; CHECK-LABEL: @test8(
; CHECK-NEXT:    br i1 %c, label %False, label %True
; CHECK:       True:
; CHECK-NEXT:    ret i8 1
; CHECK:       False:
; CHECK-NEXT:    ret i8 3
;
  %d = xor i1 %c, true
  br i1 %d, label %True, label %False

True:
  ret i8 1

False:
  ret i8 3
}

define i1 @test9(i8 %A) {
; CHECK-LABEL: @test9(
; CHECK-NEXT:    [[C:%.*]] = icmp eq i8 %A, 89
; CHECK-NEXT:    ret i1 [[C]]
;
  %B = xor i8 %A, 123
  %C = icmp eq i8 %B, 34
  ret i1 %C
}

define i8 @test10(i8 %A) {
; CHECK-LABEL: @test10(
; CHECK-NEXT:    [[B:%.*]] = and i8 %A, 3
; CHECK-NEXT:    [[C1:%.*]] = or i8 [[B]], 4
; CHECK-NEXT:    ret i8 [[C1]]
;
  %B = and i8 %A, 3
  %C = xor i8 %B, 4
  ret i8 %C
}

define i8 @test11(i8 %A) {
; CHECK-LABEL: @test11(
; CHECK-NEXT:    [[B:%.*]] = and i8 %A, -13
; CHECK-NEXT:    [[TMP1:%.*]] = or i8 [[B]], 8
; CHECK-NEXT:    ret i8 [[TMP1]]
;
  %B = or i8 %A, 12
  %C = xor i8 %B, 4
  ret i8 %C
}

define i1 @test12(i8 %A) {
; CHECK-LABEL: @test12(
; CHECK-NEXT:    [[C:%.*]] = icmp ne i8 %A, 4
; CHECK-NEXT:    ret i1 [[C]]
;
  %B = xor i8 %A, 4
  %c = icmp ne i8 %B, 0
  ret i1 %c
}

define i1 @test13(i8 %A, i8 %B) {
; CHECK-LABEL: @test13(
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ne i8 %A, %B
; CHECK-NEXT:    ret i1 [[TMP1]]
;
  %C = icmp ult i8 %A, %B
  %D = icmp ugt i8 %A, %B
  %E = xor i1 %C, %D
  ret i1 %E
}

define i1 @test14(i8 %A, i8 %B) {
; CHECK-LABEL: @test14(
; CHECK-NEXT:    ret i1 true
;
  %C = icmp eq i8 %A, %B
  %D = icmp ne i8 %B, %A
  %E = xor i1 %C, %D
  ret i1 %E
}

define i32 @test15(i32 %A) {
; CHECK-LABEL: @test15(
; CHECK-NEXT:    [[C:%.*]] = sub i32 0, %A
; CHECK-NEXT:    ret i32 [[C]]
;
  %B = add i32 %A, -1
  %C = xor i32 %B, -1
  ret i32 %C
}

define i32 @test16(i32 %A) {
; CHECK-LABEL: @test16(
; CHECK-NEXT:    [[C:%.*]] = sub i32 -124, %A
; CHECK-NEXT:    ret i32 [[C]]
;
  %B = add i32 %A, 123
  %C = xor i32 %B, -1
  ret i32 %C
}

define i32 @test17(i32 %A) {
; CHECK-LABEL: @test17(
; CHECK-NEXT:    [[C:%.*]] = add i32 %A, -124
; CHECK-NEXT:    ret i32 [[C]]
;
  %B = sub i32 123, %A
  %C = xor i32 %B, -1
  ret i32 %C
}

define i32 @test18(i32 %A) {
; CHECK-LABEL: @test18(
; CHECK-NEXT:    [[C:%.*]] = add i32 %A, 124
; CHECK-NEXT:    ret i32 [[C]]
;
  %B = xor i32 %A, -1
  %C = sub i32 123, %B
  ret i32 %C
}

define i32 @test19(i32 %A, i32 %B) {
; CHECK-LABEL: @test19(
; CHECK-NEXT:    ret i32 %B
;
  %C = xor i32 %A, %B
  %D = xor i32 %C, %A
  ret i32 %D
}

define void @test20(i32 %A, i32 %B) {
; CHECK-LABEL: @test20(
; CHECK-NEXT:    store i32 %B, i32* @G1, align 4
; CHECK-NEXT:    store i32 %A, i32* @G2, align 4
; CHECK-NEXT:    ret void
;
  %t2 = xor i32 %B, %A
  %t5 = xor i32 %t2, %B
  %t8 = xor i32 %t5, %t2
  store i32 %t8, i32* @G1
  store i32 %t5, i32* @G2
  ret void
}

define i32 @test21(i1 %C, i32 %A, i32 %B) {
; CHECK-LABEL: @test21(
; CHECK-NEXT:    [[D:%.*]] = select i1 %C, i32 %B, i32 %A
; CHECK-NEXT:    ret i32 [[D]]
;
  %C2 = xor i1 %C, true
  %D = select i1 %C2, i32 %A, i32 %B
  ret i32 %D
}

define i32 @test22(i1 %X) {
; CHECK-LABEL: @test22(
; CHECK-NEXT:    [[TMP1:%.*]] = zext i1 %X to i32
; CHECK-NEXT:    ret i32 [[TMP1]]
;
  %Y = xor i1 %X, true
  %Z = zext i1 %Y to i32
  %Q = xor i32 %Z, 1
  ret i32 %Q
}

; Look through a zext between xors.

define i32 @fold_zext_xor_sandwich(i1 %X) {
; CHECK-LABEL: @fold_zext_xor_sandwich(
; CHECK-NEXT:    [[TMP1:%.*]] = zext i1 %X to i32
; CHECK-NEXT:    [[Q:%.*]] = xor i32 [[TMP1]], 3
; CHECK-NEXT:    ret i32 [[Q]]
;
  %Y = xor i1 %X, true
  %Z = zext i1 %Y to i32
  %Q = xor i32 %Z, 2
  ret i32 %Q
}

define <2 x i32> @fold_zext_xor_sandwich_vec(<2 x i1> %X) {
; CHECK-LABEL: @fold_zext_xor_sandwich_vec(
; CHECK-NEXT:    [[TMP1:%.*]] = zext <2 x i1> %X to <2 x i32>
; CHECK-NEXT:    [[Q:%.*]] = xor <2 x i32> [[TMP1]], <i32 3, i32 3>
; CHECK-NEXT:    ret <2 x i32> [[Q]]
;
  %Y = xor <2 x i1> %X, <i1 true, i1 true>
  %Z = zext <2 x i1> %Y to <2 x i32>
  %Q = xor <2 x i32> %Z, <i32 2, i32 2>
  ret <2 x i32> %Q
}

define i1 @test23(i32 %a, i32 %b) {
; CHECK-LABEL: @test23(
; CHECK-NEXT:    [[T4:%.*]] = icmp eq i32 %b, 0
; CHECK-NEXT:    ret i1 [[T4]]
;
  %t2 = xor i32 %b, %a
  %t4 = icmp eq i32 %t2, %a
  ret i1 %t4
}

define i1 @test24(i32 %c, i32 %d) {
; CHECK-LABEL: @test24(
; CHECK-NEXT:    [[T4:%.*]] = icmp ne i32 %d, 0
; CHECK-NEXT:    ret i1 [[T4]]
;
  %t2 = xor i32 %d, %c
  %t4 = icmp ne i32 %t2, %c
  ret i1 %t4
}

define i32 @test25(i32 %g, i32 %h) {
; CHECK-LABEL: @test25(
; CHECK-NEXT:    [[T4:%.*]] = and i32 %h, %g
; CHECK-NEXT:    ret i32 [[T4]]
;
  %h2 = xor i32 %h, -1
  %t2 = and i32 %h2, %g
  %t4 = xor i32 %t2, %g
  ret i32 %t4
}

define i32 @test26(i32 %a, i32 %b) {
; CHECK-LABEL: @test26(
; CHECK-NEXT:    [[T4:%.*]] = and i32 %a, %b
; CHECK-NEXT:    ret i32 [[T4]]
;
  %b2 = xor i32 %b, -1
  %t2 = xor i32 %a, %b2
  %t4 = and i32 %t2, %a
  ret i32 %t4
}

define i32 @test27(i32 %b, i32 %c, i32 %d) {
; CHECK-LABEL: @test27(
; CHECK-NEXT:    [[T6:%.*]] = icmp eq i32 %b, %c
; CHECK-NEXT:    [[T7:%.*]] = zext i1 [[T6]] to i32
; CHECK-NEXT:    ret i32 [[T7]]
;
  %t2 = xor i32 %d, %b
  %t5 = xor i32 %d, %c
  %t6 = icmp eq i32 %t2, %t5
  %t7 = zext i1 %t6 to i32
  ret i32 %t7
}

define i32 @test28(i32 %indvar) {
; CHECK-LABEL: @test28(
; CHECK-NEXT:    [[T214:%.*]] = add i32 %indvar, 1
; CHECK-NEXT:    ret i32 [[T214]]
;
  %t7 = add i32 %indvar, -2147483647
  %t214 = xor i32 %t7, -2147483648
  ret i32 %t214
}