xor-of-or.ll | Explore in Territory

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

; Don't do anything for the fully-variable case.
define i4 @t0(i4 %x, i4 %y, i4 %z) {
; CHECK-LABEL: @t0(
; CHECK-NEXT:    [[I0:%.*]] = or i4 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    [[I1:%.*]] = xor i4 [[I0]], [[Z:%.*]]
; CHECK-NEXT:    ret i4 [[I1]]
;
  %i0 = or i4 %x, %y
  %i1 = xor i4 %i0, %z
  ret i4 %i1
}

; If the second operands are immediate constants, we can perform the fold.
define i4 @t1(i4 %x) {
; CHECK-LABEL: @t1(
; CHECK-NEXT:    [[TMP1:%.*]] = and i4 [[X:%.*]], 3
; CHECK-NEXT:    [[I1:%.*]] = xor i4 [[TMP1]], 6
; CHECK-NEXT:    ret i4 [[I1]]
;
  %i0 = or i4 %x, 12   ; 0b1100
  %i1 = xor i4 %i0, 10 ; 0b1010
  ret i4 %i1
}

; Must not have extra uses.
define i4 @t2(i4 %x) {
; CHECK-LABEL: @t2(
; CHECK-NEXT:    [[I0:%.*]] = or i4 [[X:%.*]], -4
; CHECK-NEXT:    call void @use(i4 [[I0]])
; CHECK-NEXT:    [[I1:%.*]] = xor i4 [[I0]], -6
; CHECK-NEXT:    ret i4 [[I1]]
;
  %i0 = or i4 %x, 12   ; 0b1100
  call void @use(i4 %i0)
  %i1 = xor i4 %i0, 10 ; 0b1010
  ret i4 %i1
}

; Splat constants are fine too.
define <2 x i4> @t3(<2 x i4> %x) {
; CHECK-LABEL: @t3(
; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i4> [[X:%.*]], <i4 3, i4 3>
; CHECK-NEXT:    [[I1:%.*]] = xor <2 x i4> [[TMP1]], <i4 6, i4 6>
; CHECK-NEXT:    ret <2 x i4> [[I1]]
;
  %i0 = or <2 x i4> %x, <i4 12, i4 12>
  %i1 = xor <2 x i4> %i0,  <i4 10, i4 10>
  ret <2 x i4> %i1
}

; Non-splat constants are fine too.
define <2 x i4> @t4(<2 x i4> %x) {
; CHECK-LABEL: @t4(
; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i4> [[X:%.*]], <i4 3, i4 5>
; CHECK-NEXT:    [[I1:%.*]] = xor <2 x i4> [[TMP1]], <i4 6, i4 6>
; CHECK-NEXT:    ret <2 x i4> [[I1]]
;
  %i0 = or <2 x i4> %x, <i4 12, i4 10>
  %i1 = xor <2 x i4> %i0,  <i4 10, i4 12>
  ret <2 x i4> %i1
}

; Partially-undef constants are fine.
define <2 x i4> @t5(<2 x i4> %x) {
; CHECK-LABEL: @t5(
; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i4> [[X:%.*]], <i4 3, i4 undef>
; CHECK-NEXT:    [[I1:%.*]] = xor <2 x i4> [[TMP1]], <i4 6, i4 undef>
; CHECK-NEXT:    ret <2 x i4> [[I1]]
;
  %i0 = or <2 x i4> %x, <i4 12, i4 12>
  %i1 = xor <2 x i4> %i0,  <i4 10, i4 undef>
  ret <2 x i4> %i1
}
define <2 x i4> @t6(<2 x i4> %x) {
; CHECK-LABEL: @t6(
; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i4> [[X:%.*]], <i4 3, i4 0>
; CHECK-NEXT:    [[I1:%.*]] = xor <2 x i4> [[TMP1]], <i4 6, i4 5>
; CHECK-NEXT:    ret <2 x i4> [[I1]]
;
  %i0 = or <2 x i4> %x, <i4 12, i4 undef>
  %i1 = xor <2 x i4> %i0,  <i4 10, i4 10>
  ret <2 x i4> %i1
}
define <2 x i4> @t7(<2 x i4> %x) {
; CHECK-LABEL: @t7(
; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i4> [[X:%.*]], <i4 3, i4 undef>
; CHECK-NEXT:    [[I1:%.*]] = xor <2 x i4> [[TMP1]], <i4 6, i4 undef>
; CHECK-NEXT:    ret <2 x i4> [[I1]]
;
  %i0 = or <2 x i4> %x, <i4 12, i4 undef>
  %i1 = xor <2 x i4> %i0,  <i4 10, i4 undef>
  ret <2 x i4> %i1
}

; Partially-poison constants are fine.
define <2 x i4> @t8(<2 x i4> %x) {
; CHECK-LABEL: @t8(
; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i4> [[X:%.*]], <i4 3, i4 undef>
; CHECK-NEXT:    [[I1:%.*]] = xor <2 x i4> [[TMP1]], <i4 6, i4 poison>
; CHECK-NEXT:    ret <2 x i4> [[I1]]
;
  %i0 = or <2 x i4> %x, <i4 12, i4 12>
  %i1 = xor <2 x i4> %i0,  <i4 10, i4 poison>
  ret <2 x i4> %i1
}
define <2 x i4> @t9(<2 x i4> %x) {
; CHECK-LABEL: @t9(
; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i4> [[X:%.*]], <i4 3, i4 0>
; CHECK-NEXT:    [[I1:%.*]] = xor <2 x i4> [[TMP1]], <i4 6, i4 5>
; CHECK-NEXT:    ret <2 x i4> [[I1]]
;
  %i0 = or <2 x i4> %x, <i4 12, i4 poison>
  %i1 = xor <2 x i4> %i0,  <i4 10, i4 10>
  ret <2 x i4> %i1
}
define <2 x i4> @t10(<2 x i4> %x) {
; CHECK-LABEL: @t10(
; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i4> [[X:%.*]], <i4 3, i4 undef>
; CHECK-NEXT:    [[I1:%.*]] = xor <2 x i4> [[TMP1]], <i4 6, i4 poison>
; CHECK-NEXT:    ret <2 x i4> [[I1]]
;
  %i0 = or <2 x i4> %x, <i4 12, i4 poison>
  %i1 = xor <2 x i4> %i0,  <i4 10, i4 poison>
  ret <2 x i4> %i1
}

; Do not deal with general constant expressions.
@G = external global i32
@G2 = external global i32
define i4 @t11(i4 %x) {
; CHECK-LABEL: @t11(
; CHECK-NEXT:    [[I0:%.*]] = or i4 [[X:%.*]], -4
; CHECK-NEXT:    [[I1:%.*]] = xor i4 [[I0]], ptrtoint (ptr @G2 to i4)
; CHECK-NEXT:    ret i4 [[I1]]
;
  %i0 = or i4 %x, 12
  %i1 = xor i4 %i0, ptrtoint (ptr @G2 to i4)
  ret i4 %i1
}
define i4 @t12(i4 %x) {
; CHECK-LABEL: @t12(
; CHECK-NEXT:    [[I0:%.*]] = or i4 [[X:%.*]], ptrtoint (ptr @G to i4)
; CHECK-NEXT:    [[I1:%.*]] = xor i4 [[I0]], -6
; CHECK-NEXT:    ret i4 [[I1]]
;
  %i0 = or i4 %x, ptrtoint (ptr @G to i4)
  %i1 = xor i4 %i0, 10
  ret i4 %i1
}
define i4 @t13(i4 %x) {
; CHECK-LABEL: @t13(
; CHECK-NEXT:    [[I0:%.*]] = or i4 [[X:%.*]], ptrtoint (ptr @G to i4)
; CHECK-NEXT:    [[I1:%.*]] = xor i4 [[I0]], ptrtoint (ptr @G2 to i4)
; CHECK-NEXT:    ret i4 [[I1]]
;
  %i0 = or i4 %x, ptrtoint (ptr @G to i4)
  %i1 = xor i4 %i0, ptrtoint (ptr @G2 to i4)
  ret i4 %i1
}

declare void @use(i4)
llvm/llvm/test/Transforms/InstCombine/xor-of-or.ll
