| ; This test makes sure that xor instructions are properly eliminated. |
| ; This test is for Integer BitWidth <= 64 && BitWidth % 8 != 0. |
| |
| ; RUN: opt < %s -passes=instcombine -S | not grep "xor " |
| |
| |
| define i47 @test1(i47 %A, i47 %B) { |
| ;; (A & C1)^(B & C2) -> (A & C1)|(B & C2) iff C1&C2 == 0 |
| %A1 = and i47 %A, 70368744177664 |
| %B1 = and i47 %B, 70368744177661 |
| %C1 = xor i47 %A1, %B1 |
| ret i47 %C1 |
| } |
| |
| define i15 @test2(i15 %x) { |
| %tmp.2 = xor i15 %x, 0 |
| ret i15 %tmp.2 |
| } |
| |
| define i23 @test3(i23 %x) { |
| %tmp.2 = xor i23 %x, %x |
| ret i23 %tmp.2 |
| } |
| |
| define i37 @test4(i37 %x) { |
| ; x ^ ~x == -1 |
| %NotX = xor i37 -1, %x |
| %B = xor i37 %x, %NotX |
| ret i37 %B |
| } |
| |
| define i7 @test5(i7 %A) { |
| ;; (A|B)^B == A & (~B) |
| %t1 = or i7 %A, 23 |
| %r = xor i7 %t1, 23 |
| ret i7 %r |
| } |
| |
| define i7 @test6(i7 %A) { |
| %t1 = xor i7 %A, 23 |
| %r = xor i7 %t1, 23 |
| ret i7 %r |
| } |
| |
| define i47 @test7(i47 %A) { |
| ;; (A | C1) ^ C2 -> (A | C1) & ~C2 iff (C1&C2) == C2 |
| %B1 = or i47 %A, 70368744177663 |
| %C1 = xor i47 %B1, 703687463 |
| ret i47 %C1 |
| } |