mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-01 00:12:50 +01:00
37 lines
812 B
LLVM
37 lines
812 B
LLVM
; 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
|
|
}
|