1; RUN: opt < %s -instcombine -S | FileCheck %s
2
3declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind
4declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
5
6define void @test1(i8* %a) {
7        tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %a, i32 100, i32 1, i1 false)
8        ret void
9; CHECK-LABEL: define void @test1(
10; CHECK-NEXT: ret void
11}
12
13
14; PR8267
15define void @test2(i8* %a) {
16        tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %a, i32 100, i32 1, i1 true)
17        ret void
18; CHECK-LABEL: define void @test2(
19; CHECK-NEXT: call void @llvm.memcpy
20}
21
22define void @test3(i8* %d, i8* %s) {
23        tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %d, i8* %s, i64 17179869184, i32 4, i1 false)
24        ret void
25; CHECK-LABEL: define void @test3(
26; CHECK-NEXT: call void @llvm.memcpy
27}
28