; This test makes sure that or instructions are properly eliminated. | |
; This test is for Integer BitWidth <= 64 && BitWidth % 2 != 0. | |
; | |
; RUN: opt < %s -instcombine -S | not grep or | |
define i7 @test0(i7 %X) { | |
%Y = or i7 %X, 0 | |
ret i7 %Y | |
} | |
define i17 @test1(i17 %X) { | |
%Y = or i17 %X, -1 | |
ret i17 %Y | |
} | |
define i23 @test2(i23 %A) { | |
;; A | ~A == -1 | |
%NotA = xor i23 -1, %A | |
%B = or i23 %A, %NotA | |
ret i23 %B | |
} | |
define i39 @test3(i39 %V, i39 %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 i39 274877906943, -1 ;; C2 = 274877906943 | |
%N = and i39 %M, 274877906944 | |
%A = add i39 %V, %N | |
%B = and i39 %A, %C1 | |
%D = and i39 %V, 274877906943 | |
%R = or i39 %B, %D | |
ret i39 %R | |
} |