Commit 503d061d authored by Stanislav Mekhanoshin's avatar Stanislav Mekhanoshin
Browse files

Precommit InstCombine/and-xor-or.ll test. NFC.

parent 6b82adbb

llvm/test/Transforms/InstCombine/and-xor-or.ll

+74 −0
Original line number Diff line number Diff line
@@ -516,3 +516,77 @@ define i64 @sext_or_chain_two_uses2(i64 %a, i16 %b, i16 %c, i64 %d) { 
  %use2 = udiv i64 %or2, %use1

  ret i64 %use2

}



; (a & ~b) & ~c --> a & ~(b | c)



define i32 @not_and_and_not(i32 %a0, i32 %b, i32 %c) {

; CHECK-LABEL: @not_and_and_not(

; CHECK-NEXT:    [[A:%.*]] = sdiv i32 42, [[A0:%.*]]

; CHECK-NEXT:    [[NOT1:%.*]] = xor i32 [[B:%.*]], -1

; CHECK-NEXT:    [[NOT2:%.*]] = xor i32 [[C:%.*]], -1

; CHECK-NEXT:    [[AND1:%.*]] = and i32 [[A]], [[NOT1]]

; CHECK-NEXT:    [[AND2:%.*]] = and i32 [[AND1]], [[NOT2]]

; CHECK-NEXT:    ret i32 [[AND2]]

;

  %a = sdiv i32 42, %a0 ; thwart complexity-based canonicalization

  %not1 = xor i32 %b, -1

  %not2 = xor i32 %c, -1

  %and1 = and i32 %a, %not1

  %and2 = and i32 %and1, %not2

  ret i32 %and2

}



define <4 x i64> @not_and_and_not_4i64(<4 x i64> %a0, <4 x i64> %b, <4 x i64> %c) {

; CHECK-LABEL: @not_and_and_not_4i64(

; CHECK-NEXT:    [[A:%.*]] = sdiv <4 x i64> <i64 42, i64 42, i64 42, i64 42>, [[A0:%.*]]

; CHECK-NEXT:    [[NOT1:%.*]] = xor <4 x i64> [[B:%.*]], <i64 -1, i64 -1, i64 -1, i64 -1>

; CHECK-NEXT:    [[NOT2:%.*]] = xor <4 x i64> [[C:%.*]], <i64 -1, i64 -1, i64 -1, i64 -1>

; CHECK-NEXT:    [[AND1:%.*]] = and <4 x i64> [[A]], [[NOT1]]

; CHECK-NEXT:    [[AND2:%.*]] = and <4 x i64> [[AND1]], [[NOT2]]

; CHECK-NEXT:    ret <4 x i64> [[AND2]]

;

  %a = sdiv <4 x i64> <i64 42, i64 42, i64 42, i64 42>, %a0 ; thwart complexity-based canonicalization

  %not1 = xor <4 x i64> %b, <i64 -1, i64 -1, i64 -1, i64 -1>

  %not2 = xor <4 x i64> %c, <i64 -1, i64 -1, i64 -1, i64 -1>

  %and1 = and <4 x i64> %a, %not1

  %and2 = and <4 x i64> %and1, %not2

  ret <4 x i64> %and2

}



; (~b & a) & ~c --> a & ~(b | c)



define i32 @not_and_and_not_commute1(i32 %a0, i32 %b, i32 %c) {

; CHECK-LABEL: @not_and_and_not_commute1(

; CHECK-NEXT:    [[A:%.*]] = sdiv i32 42, [[A0:%.*]]

; CHECK-NEXT:    [[NOT1:%.*]] = xor i32 [[B:%.*]], -1

; CHECK-NEXT:    [[NOT2:%.*]] = xor i32 [[C:%.*]], -1

; CHECK-NEXT:    [[AND1:%.*]] = and i32 [[A]], [[NOT1]]

; CHECK-NEXT:    [[AND2:%.*]] = and i32 [[AND1]], [[NOT2]]

; CHECK-NEXT:    ret i32 [[AND2]]

;

  %a = sdiv i32 42, %a0 ; thwart complexity-based canonicalization

  %not1 = xor i32 %b, -1

  %not2 = xor i32 %c, -1

  %and1 = and i32 %not1, %a

  %and2 = and i32 %and1, %not2

  ret i32 %and2

}



; ~c & (a & ~b) --> a & ~(b | c)



define i32 @not_and_and_not_commute2(i32 %a0, i32 %b, i32 %c) {

; CHECK-LABEL: @not_and_and_not_commute2(

; CHECK-NEXT:    [[A:%.*]] = sdiv i32 42, [[A0:%.*]]

; CHECK-NEXT:    [[NOT1:%.*]] = xor i32 [[B:%.*]], -1

; CHECK-NEXT:    [[NOT2:%.*]] = xor i32 [[C:%.*]], -1

; CHECK-NEXT:    [[AND1:%.*]] = and i32 [[A]], [[NOT1]]

; CHECK-NEXT:    [[AND2:%.*]] = and i32 [[AND1]], [[NOT2]]

; CHECK-NEXT:    ret i32 [[AND2]]

;

  %a = sdiv i32 42, %a0 ; thwart complexity-based canonicalization

  %not1 = xor i32 %b, -1

  %not2 = xor i32 %c, -1

  %and1 = and i32 %a, %not1

  %and2 = and i32 %not2, %and1

  ret i32 %and2

}