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; This test makes sure that these instructions are properly eliminated.
;

; RUN: as < %s | opt -instcombine | dis | grep -v '%OROK = or' | not grep 'or '

implementation

int %test1(int %A) {
	%B = or int %A, 0
	ret int %B
}

int %test2(int %A) {
	%B = or int %A, -1
	ret int %B
}

ubyte %test2a(ubyte %A) {
	%B = or ubyte %A, 255
	ret ubyte %B
}

bool %test3(bool %A) {
	%B = or bool %A, false
	ret bool %B
}

bool %test4(bool %A) {
	%B = or bool %A, true
	ret bool %B
}

bool %test5(bool %A) {
	%B = xor bool %A, false
	ret bool %B
}

int %test6(int %A) {
	%B = xor int %A, 0
	ret int %B
}

bool %test7(bool %A) {
	%B = xor bool %A, %A
	ret bool %B
}

int %test8(int %A) {
	%B = xor int %A, %A
	ret int %B
}

bool %test9(bool %A) {
	%B = or bool %A, %A
	ret bool %B
}

int %test10(int %A) {
	%B = or int %A, %A
	ret int %B
}

int %test11(int %A) {    ; A ^ ~A == -1
        %NotA = xor int -1, %A
        %B = xor int %A, %NotA
        ret int %B
}

int %test12(int %A) {    ; A | ~A == -1
        %NotA = xor int -1, %A
        %B = or int %A, %NotA
        ret int %B
}

uint %test13(uint %A) { ; (A|B)^B == A & (~B)
	%t1 = or uint %A, 123
	%r  = xor uint %t1, 123
	ret uint %r
}

ubyte %test14(ubyte %A) {
	%B = or ubyte %A, 254
	%C = or ubyte %B, 1
	ret ubyte %C
}
ubyte %test15(ubyte %A) {
	%B = xor ubyte %A, 17
	%C = xor ubyte %B, 17
	ret ubyte %C
}

int %test16(int %A, int %B) {     ; (A & C1)^(B & C2) -> (A & C1)|(B & C2) iff C1&C2 == 0
        %A1 = and int %A, 7
        %B1 = and int %B, 128
        %OROK = xor int %A1, %B1
        ret int %OROK
}

ubyte %test17(ubyte %A, ubyte %B) {  ; Test that (A|c1)|(B|c2) == (A|B)|(c1|c2)
	%C = or ubyte %A, 1
	%D = or ubyte %B, 254
	%E = or ubyte %C, %D
	ret ubyte %E
}

ubyte %test18(bool %c) {
	%d = xor bool %c, true    ; invert the condition
	br bool %d, label %True, label %False
True:
	ret ubyte 1
False:
	ret ubyte 3
}

bool %test19(ubyte %A) {
	%B = xor ubyte %A, 123      ; xor can be eliminated
	%C = seteq ubyte %B, 34
	ret bool %C
}

ubyte %test21(ubyte %A) {
	%B = or ubyte %A, 1
	%C = and ubyte %B, 254
	%D = or ubyte %C, 254  ; (X & C1) | C2 --> (X | C2) & (C1|C2)
	ret ubyte %D
}

ubyte %test22(ubyte %A) {
	%B = or ubyte %A, 254
	%C = xor ubyte %B, 13
	%D = or ubyte %C, 1    ; (X ^ C1) | C2 --> (X | C2) ^ (C1&~C2)
	%E = xor ubyte %D, 12
	ret ubyte %E
}

uint %test23(uint %A) {
	%B = or uint %A, 4     ; Should be eliminated
	%C = and uint %B, 8
	ret uint %C
}

uint %test24(uint %A) {
	%B = or uint %A, 12
	%C = and uint %B, 8    ; Always equal to 8
	ret uint %C 
}