1; This test makes sure that memmove instructions are properly eliminated.
2;
3; RUN: opt < %s -instcombine -S | not grep "call void @llvm.memmove"
4
5@S = internal constant [33 x i8] c"panic: restorelist inconsistency\00"		; <[33 x i8]*> [#uses=1]
6@h = constant [2 x i8] c"h\00"		; <[2 x i8]*> [#uses=1]
7@hel = constant [4 x i8] c"hel\00"		; <[4 x i8]*> [#uses=1]
8@hello_u = constant [8 x i8] c"hello_u\00"		; <[8 x i8]*> [#uses=1]
9
10define void @test1(i8* %A, i8* %B, i32 %N) {
11	call void @llvm.memmove.p0i8.p0i8.i32(i8* %A, i8* %B, i32 0, i32 1, i1 false)
12	ret void
13}
14
15define void @test2(i8* %A, i32 %N) {
16        ;; dest can't alias source since we can't write to source!
17	call void @llvm.memmove.p0i8.p0i8.i32(i8* %A, i8* getelementptr inbounds ([33 x i8], [33 x i8]* @S, i32 0, i32 0), i32 %N, i32 1, i1 false)
18	ret void
19}
20
21define i32 @test3() {
22	%h_p = getelementptr [2 x i8], [2 x i8]* @h, i32 0, i32 0		; <i8*> [#uses=1]
23	%hel_p = getelementptr [4 x i8], [4 x i8]* @hel, i32 0, i32 0		; <i8*> [#uses=1]
24	%hello_u_p = getelementptr [8 x i8], [8 x i8]* @hello_u, i32 0, i32 0		; <i8*> [#uses=1]
25	%target = alloca [1024 x i8]		; <[1024 x i8]*> [#uses=1]
26	%target_p = getelementptr [1024 x i8], [1024 x i8]* %target, i32 0, i32 0		; <i8*> [#uses=3]
27        call void @llvm.memmove.p0i8.p0i8.i32(i8* %target_p, i8* %h_p, i32 2, i32 2, i1 false)
28        call void @llvm.memmove.p0i8.p0i8.i32(i8* %target_p, i8* %hel_p, i32 4, i32 4, i1 false)
29        call void @llvm.memmove.p0i8.p0i8.i32(i8* %target_p, i8* %hello_u_p, i32 8, i32 8, i1 false)
30	ret i32 0
31}
32
33; PR2370
34define void @test4(i8* %a) {
35  tail call void @llvm.memmove.p0i8.p0i8.i32(i8* %a, i8* %a, i32 100, i32 1, i1 false)
36  ret void
37}
38
39declare void @llvm.memmove.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind
40