1; RUN: opt < %s -basic-aa -loop-interchange -pass-remarks-missed='loop-interchange' -pass-remarks-output=%t -S \
2; RUN:     -verify-dom-info -verify-loop-info -verify-loop-lcssa 2>&1 | FileCheck -check-prefix=IR %s
3; RUN: FileCheck --input-file=%t %s
4
5; Outer loop only reductions are not supported currently.
6
7target triple = "powerpc64le-unknown-linux-gnu"
8@A = common global [500 x [500 x i32]] zeroinitializer
9
10;; global X
11
12;;  for( int i=1;i<N;i++) {
13;;    for( int j=1;j<N;j++)
14;;      ;
15;;    X+=A[j][i];
16;;  }
17
18; CHECK: --- !Missed
19; CHECK-NEXT: Pass:            loop-interchange
20; CHECK-NEXT: Name:            UnsupportedPHI
21; CHECK-NEXT: Function:        reduction_01
22
23; IR-LABEL: @reduction_01(
24; IR-NOT: split
25
26define i32 @reduction_01(i32 %N) {
27entry:
28  br label %outer.header
29
30outer.header:                                  ; preds = %for.cond1.for.inc6_crit_edge, %entry
31  %indvars.iv18 = phi i64 [ %indvars.iv.next19, %outer.inc ], [ 1, %entry ]
32  %add15 = phi i32 [ 0, %entry ], [ %add, %outer.inc ]
33  br label %for.body3
34
35for.body3:                                        ; preds = %for.body3, %for.body3.lr.ph
36  %indvars.iv = phi i64 [ 1, %outer.header ], [ %indvars.iv.next, %for.body3 ]
37  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
38  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
39  %exitcond = icmp eq i32 %lftr.wideiv, %N
40  br i1 %exitcond, label %outer.inc, label %for.body3
41
42outer.inc:                     ; preds = %for.body3
43  %arrayidx5 = getelementptr inbounds [500 x [500 x i32]], [500 x [500 x i32]]* @A, i64 0, i64 %indvars.iv, i64 %indvars.iv18
44  %0 = load i32, i32* %arrayidx5
45  %add = add nsw i32 %add15, %0
46  %indvars.iv.next19 = add nuw nsw i64 %indvars.iv18, 1
47  %lftr.wideiv20 = trunc i64 %indvars.iv.next19 to i32
48  %exitcond21 = icmp eq i32 %lftr.wideiv20, %N
49  br i1 %exitcond21, label %for.end8, label %outer.header
50
51for.end8:                                         ; preds = %for.cond1.for.inc6_crit_edge, %entry
52  ret i32 %add
53}
54