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36 lines
849 B
LLVM
36 lines
849 B
LLVM
; This test makes sure that or instructions are properly eliminated.
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; This test is for Integer BitWidth > 64 && BitWidth <= 1024.
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;
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; RUN: opt < %s -instcombine -S | not grep or
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define i777 @test0(i777 %X) {
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%Y = or i777 %X, 0
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ret i777 %Y
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}
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define i117 @test1(i117 %X) {
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%Y = or i117 %X, -1
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ret i117 %Y
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}
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define i1023 @test2(i1023 %A) {
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;; A | ~A == -1
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%NotA = xor i1023 -1, %A
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%B = or i1023 %A, %NotA
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ret i1023 %B
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}
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define i399 @test3(i399 %V, i399 %M) {
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;; If we have: ((V + N) & C1) | (V & C2)
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;; .. and C2 = ~C1 and C2 is 0+1+ and (N & C2) == 0
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;; replace with V+N.
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%C1 = xor i399 274877906943, -1 ;; C2 = 274877906943
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%N = and i399 %M, 18446742974197923840
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%A = add i399 %V, %N
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%B = and i399 %A, %C1
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%D = and i399 %V, 274877906943
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%R = or i399 %B, %D
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ret i399 %R
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}
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