test/Transforms/InstCombine/fold-a-or-b-zero.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt < %s -S -passes=instcombine | FileCheck %s

declare void @use(i1)

define i1 @a_or_b(i32 %a, i32 %b)  {
; CHECK-LABEL: define i1 @a_or_b(
; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i32 [[A]], 0
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[B]], 0
; CHECK-NEXT:    [[OR:%.*]] = xor i1 [[TMP1]], [[TMP2]]
; CHECK-NEXT:    ret i1 [[OR]]
;
  %a_eq_zero = icmp eq i32 %a, 0
  %b_ne_zero = icmp ne i32 %b, 0
  %and.1 = and i1 %a_eq_zero, %b_ne_zero
  %a_ne_zero = icmp ne i32 %a, 0
  %b_eq_zero = icmp eq i32 %b, 0
  %and.2 = and i1 %a_ne_zero, %b_eq_zero
  %or = or i1 %and.1, %and.2
  ret i1 %or
}

define i1 @a_or_b_not_inv(i32 %a, i32 %b){
; CHECK-LABEL: define i1 @a_or_b_not_inv(
; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]]) {
; CHECK-NEXT:    [[A_EQ_ZERO:%.*]] = icmp eq i32 [[A]], 0
; CHECK-NEXT:    [[B_NE_ZERO:%.*]] = icmp ne i32 [[B]], 0
; CHECK-NEXT:    [[AND_1:%.*]] = and i1 [[A_EQ_ZERO]], [[B_NE_ZERO]]
; CHECK-NEXT:    [[A_NE_ZERO:%.*]] = icmp ne i32 [[A]], 0
; CHECK-NEXT:    [[B_EQ_1:%.*]] = icmp eq i32 [[B]], 1
; CHECK-NEXT:    [[AND_2:%.*]] = and i1 [[A_NE_ZERO]], [[B_EQ_1]]
; CHECK-NEXT:    [[OR:%.*]] = or i1 [[AND_1]], [[AND_2]]
; CHECK-NEXT:    ret i1 [[OR]]
;
  %a_eq_zero = icmp eq i32 %a, 0
  %b_ne_zero = icmp ne i32 %b, 0
  %and.1 = and i1 %a_eq_zero, %b_ne_zero
  %a_ne_zero = icmp ne i32 %a, 0
  %b_eq_1 = icmp eq i32 %b, 1
  %and.2 = and i1 %a_ne_zero, %b_eq_1
  %or = or i1 %and.1, %and.2
  ret i1 %or
}

define i1 @a_or_b_const(i32 %a, i32 %b, i32 %c)  {
; CHECK-LABEL: define i1 @a_or_b_const(
; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]], i32 [[C:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i32 [[A]], [[C]]
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[B]], [[C]]
; CHECK-NEXT:    [[OR:%.*]] = xor i1 [[TMP1]], [[TMP2]]
; CHECK-NEXT:    ret i1 [[OR]]
;
  %a_eq_c = icmp eq i32 %a, %c
  %b_ne_c = icmp ne i32 %b, %c
  %and.1 = and i1 %a_eq_c, %b_ne_c
  %a_ne_c = icmp ne i32 %a, %c
  %b_eq_c = icmp eq i32 %b, %c
  %and.2 = and i1 %a_ne_c, %b_eq_c
  %or = or i1 %and.1, %and.2
  ret i1 %or
}

define i1 @a_or_b_const2(i32 %a, i32 %b, i32 %c, i32 %d)  {
; CHECK-LABEL: define i1 @a_or_b_const2(
; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]], i32 [[C:%.*]], i32 [[D:%.*]]) {
; CHECK-NEXT:    [[A_EQ_C:%.*]] = icmp eq i32 [[A]], [[C]]
; CHECK-NEXT:    [[B_EQ_D:%.*]] = icmp eq i32 [[B]], [[D]]
; CHECK-NEXT:    [[OR:%.*]] = xor i1 [[A_EQ_C]], [[B_EQ_D]]
; CHECK-NEXT:    ret i1 [[OR]]
;
  %a_eq_c = icmp eq i32 %a, %c
  %b_ne_d = icmp ne i32 %b, %d
  %and.1 = and i1 %a_eq_c, %b_ne_d
  %a_ne_c = icmp ne i32 %a, %c
  %b_eq_d = icmp eq i32 %b, %d
  %and.2 = and i1 %a_ne_c, %b_eq_d
  %or = or i1 %and.1, %and.2
  ret i1 %or
}
define i1 @a_or_b_nullptr(ptr %a, ptr %b) {
; CHECK-LABEL: define i1 @a_or_b_nullptr(
; CHECK-SAME: ptr [[A:%.*]], ptr [[B:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq ptr [[A]], null
; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq ptr [[B]], null
; CHECK-NEXT:    [[OR:%.*]] = xor i1 [[TMP1]], [[TMP2]]
; CHECK-NEXT:    ret i1 [[OR]]
;
  %a_null = icmp eq ptr %a, null
  %b_null = icmp eq ptr %b, null
  %a_not_null = icmp ne ptr %a, null
  %b_not_null = icmp ne ptr %b, null
  %and.1 = and i1 %a_null, %b_not_null
  %and.2 = and i1 %a_not_null, %b_null
  %or = or i1 %and.1, %and.2
  ret i1 %or
}

define i1 @a_or_b_multiple_uses(i32 %a, i32 %b)  {
; CHECK-LABEL: define i1 @a_or_b_multiple_uses(
; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i32 [[A]], 0
; CHECK-NEXT:    [[A_NE_ZERO:%.*]] = icmp ne i32 [[A]], 0
; CHECK-NEXT:    [[B_EQ_ZERO:%.*]] = icmp eq i32 [[B]], 0
; CHECK-NEXT:    [[AND_2:%.*]] = and i1 [[A_NE_ZERO]], [[B_EQ_ZERO]]
; CHECK-NEXT:    call void @use(i1 [[AND_2]])
; CHECK-NEXT:    [[OR:%.*]] = xor i1 [[TMP1]], [[B_EQ_ZERO]]
; CHECK-NEXT:    ret i1 [[OR]]
;
  %a_eq_zero = icmp eq i32 %a, 0
  %b_ne_zero = icmp ne i32 %b, 0
  %and.1 = and i1 %a_eq_zero, %b_ne_zero
  %a_ne_zero = icmp ne i32 %a, 0
  %b_eq_zero = icmp eq i32 %b, 0
  %and.2 = and i1 %a_ne_zero, %b_eq_zero
  call void @use(i1 %and.2)
  %or = or i1 %and.1, %and.2
  ret i1 %or
}

define i1 @a_or_b_multiple_uses_2(i32 %a, i32 %b)  {
; CHECK-LABEL: define i1 @a_or_b_multiple_uses_2(
; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]]) {
; CHECK-NEXT:    [[A_EQ_ZERO:%.*]] = icmp eq i32 [[A]], 0
; CHECK-NEXT:    [[B_NE_ZERO:%.*]] = icmp ne i32 [[B]], 0
; CHECK-NEXT:    call void @use(i1 [[B_NE_ZERO]])
; CHECK-NEXT:    [[AND_1:%.*]] = and i1 [[A_EQ_ZERO]], [[B_NE_ZERO]]
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i32 [[B]], 0
; CHECK-NEXT:    call void @use(i1 [[AND_1]])
; CHECK-NEXT:    [[OR:%.*]] = xor i1 [[A_EQ_ZERO]], [[TMP1]]
; CHECK-NEXT:    ret i1 [[OR]]
;
  %a_eq_zero = icmp eq i32 %a, 0
  %b_ne_zero = icmp ne i32 %b, 0
  call void @use(i1 %b_ne_zero)
  %and.1 = and i1 %a_eq_zero, %b_ne_zero
  %a_ne_zero = icmp ne i32 %a, 0
  %b_eq_zero = icmp eq i32 %b, 0
  %and.2 = and i1 %a_ne_zero, %b_eq_zero
  call void @use(i1 %and.1)
  %or = or i1 %and.1, %and.2
  ret i1 %or
}