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1; RUN: opt -loop-load-elim -S < %s | FileCheck %s
2
3; Make sure we create a preheader if we dont' have one.
4
5target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
6
7define void @f(i32* noalias nocapture %A, i32* noalias nocapture readonly %B, i64 %N, i1 %C) {
8entry:
9  br i1 %C, label %for.body, label %for.end
10
11; CHECK: for.body.preheader:
12; CHECK-NEXT: %load_initial = load i32, i32* %A
13; CHECK-NEXT: br label %for.body
14
15; CHECK: for.body:
16for.body:
17; CHECK-NEXT: %store_forwarded = phi i32 [ %load_initial, %for.body.preheader ], [ %add, %for.body ]
18  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
19  %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
20  %load = load i32, i32* %arrayidx, align 4
21  %arrayidx2 = getelementptr inbounds i32, i32* %B, i64 %indvars.iv
22  %load_1 = load i32, i32* %arrayidx2, align 4
23; CHECK: %add = add i32 %load_1, %store_forwarded
24  %add = add i32 %load_1, %load
25  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
26  %arrayidx_next = getelementptr inbounds i32, i32* %A, i64 %indvars.iv.next
27  store i32 %add, i32* %arrayidx_next, align 4
28  %exitcond = icmp eq i64 %indvars.iv.next, %N
29  br i1 %exitcond, label %for.end, label %for.body
30
31for.end:
32  ret void
33}
34