1; RUN: opt -loop-idiom < %s -S | FileCheck %s
2target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
3target triple = "x86_64-unknown-linux-gnu"
4
5declare void @ff()
6
7define void @test(i8* noalias nocapture %base, i64 %size) #1 {
8entry:
9  %cmp3 = icmp eq i64 %size, 0
10  br i1 %cmp3, label %for.end, label %for.body.preheader
11
12for.body.preheader:                               ; preds = %entry
13  br label %for.body
14
15for.body:                                         ; preds = %for.body.preheader, %for.body
16; CHECK-LABEL: @test(
17; CHECK-NOT: llvm.memset
18  %indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
19  tail call void @ff()
20  %arrayidx = getelementptr inbounds i8, i8* %base, i64 %indvars.iv
21  store i8 0, i8* %arrayidx, align 1
22  %indvars.iv.next = add i64 %indvars.iv, 1
23  %exitcond = icmp ne i64 %indvars.iv.next, %size
24  br i1 %exitcond, label %for.body, label %for.end.loopexit
25
26for.end.loopexit:                                 ; preds = %for.body
27  br label %for.end
28
29for.end:                                          ; preds = %for.end.loopexit, %entry
30  ret void
31}
32
33attributes #1 = { uwtable }
34