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