llvm-6502/test/Transforms/InstCombine/rem.ll

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; This test makes sure that these instructions are properly eliminated.
;
; RUN: llvm-as < %s | opt -instcombine -disable-output &&
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep rem
implementation
int %test1(int %A) {
%B = rem int %A, 1 ; ISA constant 0
ret int %B
}
int %test2(int %A) { ; 0 % X = 0, we don't need to preserve traps
%B = rem int 0, %A
ret int %B
}
uint %test3(uint %A) {
%B = rem uint %A, 8 ; & 7
ret uint %B
}
bool %test3(int %A) {
%B = rem int %A, -8 ; & 7
%C = setne int %B, 0
ret bool %C
}
uint %test4(uint %X, bool %C) {
%V = select bool %C, uint 1, uint 8
%R = rem uint %X, %V
ret uint %R
}
uint %test5(uint %X, ubyte %B) {
%Amt = shl uint 32, ubyte %B
%V = rem uint %X, %Amt
ret uint %V
}
int %test6(int %A) {
%B = rem int %A, 0 ;; undef
ret int %B
}