1; RUN: opt -loop-idiom -S < %s | FileCheck %s
2
3target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
4target triple = "x86_64-unknown-linux-gnu"
5
6define void @test1() {
7entry:
8  br label %for.body.preheader
9
10for.body.preheader:                               ; preds = %for.cond
11  br label %for.body
12
13for.body:                                         ; preds = %for.body, %for.body.preheader
14  %indvars.iv = phi i32 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
15  %add.ptr3 = getelementptr inbounds i32, i32* null, i32 %indvars.iv
16  %add.ptr4 = getelementptr inbounds i32, i32* %add.ptr3, i32 1
17  %0 = load i32, i32* %add.ptr4, align 4
18  store i32 %0, i32* %add.ptr3, align 4
19  %indvars.iv.next = add nsw i32 %indvars.iv, 1
20  %exitcond = icmp ne i32 %indvars.iv.next, 6
21  br i1 %exitcond, label %for.body, label %for.body.preheader
22}
23
24; CHECK-LABEL: define void @test1(
25; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* null, i8* inttoptr (i64 4 to i8*), i64 24, i32 4, i1 false)
26; CHECK-NOT: store
27