1 ; This test makes sure that xor instructions are properly eliminated. 2 ; This test is for Integer BitWidth <= 64 && BitWidth % 8 != 0. 3 4 ; RUN: opt < %s -instcombine -S | not grep "xor " 5 6 7 define i47 @test1(i47 %A, i47 %B) { 8 ;; (A & C1)^(B & C2) -> (A & C1)|(B & C2) iff C1&C2 == 0 9 %A1 = and i47 %A, 70368744177664 10 %B1 = and i47 %B, 70368744177661 11 %C1 = xor i47 %A1, %B1 12 ret i47 %C1 13 } 14 15 define i15 @test2(i15 %x) { 16 %tmp.2 = xor i15 %x, 0 17 ret i15 %tmp.2 18 } 19 20 define i23 @test3(i23 %x) { 21 %tmp.2 = xor i23 %x, %x 22 ret i23 %tmp.2 23 } 24 25 define i37 @test4(i37 %x) { 26 ; x ^ ~x == -1 27 %NotX = xor i37 -1, %x 28 %B = xor i37 %x, %NotX 29 ret i37 %B 30 } 31 32 define i7 @test5(i7 %A) { 33 ;; (A|B)^B == A & (~B) 34 %t1 = or i7 %A, 23 35 %r = xor i7 %t1, 23 36 ret i7 %r 37 } 38 39 define i7 @test6(i7 %A) { 40 %t1 = xor i7 %A, 23 41 %r = xor i7 %t1, 23 42 ret i7 %r 43 } 44 45 define i47 @test7(i47 %A) { 46 ;; (A | C1) ^ C2 -> (A | C1) & ~C2 iff (C1&C2) == C2 47 %B1 = or i47 %A, 70368744177663 48 %C1 = xor i47 %B1, 703687463 49 ret i47 %C1 50 } 51
