52 lines
1.2 KiB
LLVM
52 lines
1.2 KiB
LLVM
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; This test makes sure that xor instructions are properly eliminated.
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; This test is for Integer BitWidth > 64 && BitWidth <= 1024.
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; RUN: opt < %s -instcombine -S | not grep {xor }
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; END.
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define i447 @test1(i447 %A, i447 %B) {
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;; (A & C1)^(B & C2) -> (A & C1)|(B & C2) iff C1&C2 == 0
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%A1 = and i447 %A, 70368744177664
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%B1 = and i447 %B, 70368744177663
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%C1 = xor i447 %A1, %B1
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ret i447 %C1
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}
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define i1005 @test2(i1005 %x) {
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%tmp.2 = xor i1005 %x, 0
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ret i1005 %tmp.2
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}
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define i123 @test3(i123 %x) {
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%tmp.2 = xor i123 %x, %x
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ret i123 %tmp.2
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}
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define i737 @test4(i737 %x) {
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; x ^ ~x == -1
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%NotX = xor i737 -1, %x
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%B = xor i737 %x, %NotX
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ret i737 %B
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}
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define i700 @test5(i700 %A) {
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;; (A|B)^B == A & (~B)
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%t1 = or i700 %A, 288230376151711743
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%r = xor i700 %t1, 288230376151711743
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ret i700 %r
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}
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define i77 @test6(i77 %A) {
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%t1 = xor i77 %A, 23
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%r = xor i77 %t1, 23
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ret i77 %r
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}
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define i1023 @test7(i1023 %A) {
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;; (A | C1) ^ C2 -> (A | C1) & ~C2 iff (C1&C2) == C2
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%B1 = or i1023 %A, 70368744177663
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%C1 = xor i1023 %B1, 703687463
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ret i1023 %C1
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}
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