1; RUN: opt -loop-load-elim -S < %s -enable-new-pm=0 | FileCheck %s
2; New PM does not allow a pass to require another pass to have been run
3; RUN: opt -passes=loop-simplify,loop-load-elim -S < %s | FileCheck %s
4
5; Make sure we create a preheader if we don't have one.
6
7target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
8
9define void @f(i32* noalias nocapture %A, i32* noalias nocapture readonly %B, i64 %N, i1 %C) {
10entry:
11  br i1 %C, label %for.body, label %for.end
12
13; CHECK: for.body.preheader:
14; CHECK-NEXT: %load_initial = load i32, i32* %A
15; CHECK-NEXT: br label %for.body
16
17; CHECK: for.body:
18for.body:
19; CHECK-NEXT: %store_forwarded = phi i32 [ %load_initial, %for.body.preheader ], [ %add, %for.body ]
20  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
21  %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
22  %load = load i32, i32* %arrayidx, align 4
23  %arrayidx2 = getelementptr inbounds i32, i32* %B, i64 %indvars.iv
24  %load_1 = load i32, i32* %arrayidx2, align 4
25; CHECK: %add = add i32 %load_1, %store_forwarded
26  %add = add i32 %load_1, %load
27  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
28  %arrayidx_next = getelementptr inbounds i32, i32* %A, i64 %indvars.iv.next
29  store i32 %add, i32* %arrayidx_next, align 4
30  %exitcond = icmp eq i64 %indvars.iv.next, %N
31  br i1 %exitcond, label %for.end, label %for.body
32
33for.end:
34  ret void
35}
36