1 ; This test makes sure that these instructions are properly eliminated.
3 ; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep rem
5 define i32 @test1(i32 %A) {
6 %B = srem i32 %A, 1 ; <i32> [#uses=1]
10 define i32 @test2(i32 %A) {
11 %B = srem i32 0, %A ; <i32> [#uses=1]
15 define i32 @test3(i32 %A) {
16 %B = urem i32 %A, 8 ; <i32> [#uses=1]
20 define i1 @test3a(i32 %A) {
21 %B = srem i32 %A, -8 ; <i32> [#uses=1]
22 %C = icmp ne i32 %B, 0 ; <i1> [#uses=1]
26 define i32 @test4(i32 %X, i1 %C) {
27 %V = select i1 %C, i32 1, i32 8 ; <i32> [#uses=1]
28 %R = urem i32 %X, %V ; <i32> [#uses=1]
32 define i32 @test5(i32 %X, i8 %B) {
33 %shift.upgrd.1 = zext i8 %B to i32 ; <i32> [#uses=1]
34 %Amt = shl i32 32, %shift.upgrd.1 ; <i32> [#uses=1]
35 %V = urem i32 %X, %Amt ; <i32> [#uses=1]
39 define i32 @test6(i32 %A) {
40 %B = srem i32 %A, 0 ; <i32> [#uses=1]
44 define i32 @test7(i32 %A) {
45 %B = mul i32 %A, 26 ; <i32> [#uses=1]
46 %C = srem i32 %B, 13 ; <i32> [#uses=1]
50 define i32 @test8(i32 %A) {
51 %B = shl i32 %A, 4 ; <i32> [#uses=1]
52 %C = srem i32 %B, 8 ; <i32> [#uses=1]
56 define i32 @test9(i32 %A) {
57 %B = mul i32 %A, 124 ; <i32> [#uses=1]
58 %C = urem i32 %B, 62 ; <i32> [#uses=1]
62 define i32 @test10(i8 %c) {
63 %tmp.1 = zext i8 %c to i32 ; <i32> [#uses=1]
64 %tmp.2 = mul i32 %tmp.1, 3 ; <i32> [#uses=1]
65 %tmp.3 = sext i32 %tmp.2 to i64 ; <i64> [#uses=1]
66 %tmp.5 = urem i64 %tmp.3, 3 ; <i64> [#uses=1]
67 %tmp.6 = trunc i64 %tmp.5 to i32 ; <i32> [#uses=1]
71 define i32 @test11(i32 %i) {
72 %tmp.1 = and i32 %i, -2 ; <i32> [#uses=1]
73 %tmp.3 = mul i32 %tmp.1, 3 ; <i32> [#uses=1]
74 %tmp.5 = srem i32 %tmp.3, 6 ; <i32> [#uses=1]