1; RUN: opt -basicaa -dse -S < %s | FileCheck %s
2
3declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
4
5define void @fn(i8* nocapture %buf) #0 {
6entry:
7
8; We would not eliminate the first memcpy with data layout, and we should not
9; eliminate it without data layout.
10; CHECK-LABEL: @fn
11; CHECK: tail call void @llvm.memcpy.p0i8.p0i8.i64
12; CHECK: tail call void @llvm.memcpy.p0i8.p0i8.i64
13; CHECK: ret void
14
15  %arrayidx = getelementptr i8, i8* %buf, i64 18
16  tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %arrayidx, i8* %buf, i64 18, i32 1, i1 false)
17  store i8 1, i8* %arrayidx, align 1
18  tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %buf, i8* %arrayidx, i64 18, i32 1, i1 false)
19  ret void
20}
21
22