llvm/test/Transforms/InstSimplify/subnuw-with-xor.ll

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

define i8 @xor_w_sub_fail_missing_nuw(i8 range(i8 0, 16) %x) {
; CHECK-LABEL: define i8 @xor_w_sub_fail_missing_nuw(
; CHECK-SAME: i8 range(i8 0, 16) [[X:%.*]]) {
; CHECK-NEXT:    [[XOR:%.*]] = xor i8 [[X]], 15
; CHECK-NEXT:    [[R:%.*]] = sub nsw i8 15, [[XOR]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %xor = xor i8 %x, 15
  %r = sub nsw i8 15, %xor
  ret i8 %r
}

define i8 @xor_w_sub_fail_diff_values(i8 range(i8 0, 16) %x) {
; CHECK-LABEL: define i8 @xor_w_sub_fail_diff_values(
; CHECK-SAME: i8 range(i8 0, 16) [[X:%.*]]) {
; CHECK-NEXT:    [[XOR:%.*]] = xor i8 [[X]], 15
; CHECK-NEXT:    [[R:%.*]] = sub nuw nsw i8 31, [[XOR]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %xor = xor i8 %x, 15
  %r = sub nsw nuw i8 31, %xor
  ret i8 %r
}

define i8 @xor_w_sub_fail_diff_values2(i8 range(i8 0, 16) %x) {
; CHECK-LABEL: define i8 @xor_w_sub_fail_diff_values2(
; CHECK-SAME: i8 range(i8 0, 16) [[X:%.*]]) {
; CHECK-NEXT:    [[XOR:%.*]] = xor i8 [[X]], 31
; CHECK-NEXT:    [[R:%.*]] = sub nuw nsw i8 15, [[XOR]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %xor = xor i8 %x, 31
  %r = sub nsw nuw i8 15, %xor
  ret i8 %r
}

define i8 @xor_w_sub_fail_not_mask(i8 range(i8 0, 16) %x) {
; CHECK-LABEL: define i8 @xor_w_sub_fail_not_mask(
; CHECK-SAME: i8 range(i8 0, 16) [[X:%.*]]) {
; CHECK-NEXT:    [[XOR:%.*]] = xor i8 [[X]], 30
; CHECK-NEXT:    [[R:%.*]] = sub nuw nsw i8 30, [[XOR]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %xor = xor i8 %x, 30
  %r = sub nsw nuw i8 30, %xor
  ret i8 %r
}

define i8 @xor_w_sub_okay(i8 range(i8 0, 16) %x) {
; CHECK-LABEL: define i8 @xor_w_sub_okay(
; CHECK-SAME: i8 range(i8 0, 16) [[X:%.*]]) {
; CHECK-NEXT:    ret i8 [[X]]
;
  %xor = xor i8 %x, 31
  %r = sub nsw nuw i8 31, %xor
  ret i8 %r
}

define i8 @sub_w_xor_fail_missing_nuw(i8 range(i8 0, 16) %x) {
; CHECK-LABEL: define i8 @sub_w_xor_fail_missing_nuw(
; CHECK-SAME: i8 range(i8 0, 16) [[X:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i8 15, [[X]]
; CHECK-NEXT:    [[R:%.*]] = xor i8 [[SUB]], 15
; CHECK-NEXT:    ret i8 [[R]]
;
  %sub = sub nsw i8 15, %x
  %r = xor i8 %sub, 15
  ret i8 %r
}

define i8 @sub_w_xor_fail_diff_values(i8 range(i8 0, 16) %x) {
; CHECK-LABEL: define i8 @sub_w_xor_fail_diff_values(
; CHECK-SAME: i8 range(i8 0, 16) [[X:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = sub nuw nsw i8 15, [[X]]
; CHECK-NEXT:    [[R:%.*]] = xor i8 [[SUB]], 31
; CHECK-NEXT:    ret i8 [[R]]
;
  %sub = sub nsw nuw i8 15, %x
  %r = xor i8 %sub, 31
  ret i8 %r
}

define i8 @sub_w_sub_fail_diff_values2(i8 range(i8 0, 16) %x) {
; CHECK-LABEL: define i8 @sub_w_sub_fail_diff_values2(
; CHECK-SAME: i8 range(i8 0, 16) [[X:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = sub nuw nsw i8 31, [[X]]
; CHECK-NEXT:    [[R:%.*]] = xor i8 [[SUB]], 15
; CHECK-NEXT:    ret i8 [[R]]
;
  %sub = sub nsw nuw i8 31, %x
  %r = xor i8 %sub, 15
  ret i8 %r
}

define i8 @sub_w_sub_fail_not_mask(i8 range(i8 0, 16) %x) {
; CHECK-LABEL: define i8 @sub_w_sub_fail_not_mask(
; CHECK-SAME: i8 range(i8 0, 16) [[X:%.*]]) {
; CHECK-NEXT:    [[SUB:%.*]] = sub nuw nsw i8 30, [[X]]
; CHECK-NEXT:    [[R:%.*]] = xor i8 [[SUB]], 30
; CHECK-NEXT:    ret i8 [[R]]
;
  %sub = sub nsw nuw i8 30, %x
  %r = xor i8 %sub, 30
  ret i8 %r
}

define i8 @sub_w_sub_okay(i8 range(i8 0, 16) %x) {
; CHECK-LABEL: define i8 @sub_w_sub_okay(
; CHECK-SAME: i8 range(i8 0, 16) [[X:%.*]]) {
; CHECK-NEXT:    ret i8 [[X]]
;
  %sub = sub nsw nuw i8 31, %x
  %r = xor i8 %sub, 31
  ret i8 %r
}