1; REQUIRES: asserts
2; RUN: opt < %s -basic-aa -loop-interchange -cache-line-size=64 -verify-dom-info -verify-loop-info \
3; RUN:     -S -debug 2>&1 | FileCheck %s
4
5target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
6
7@D = common global [100 x [100 x [100 x i32]]] zeroinitializer
8
9;; Test for interchange in loop nest greater than 2.
10;;  for(int i=0;i<100;i++)
11;;    for(int j=0;j<100;j++)
12;;      for(int k=0;k<100;k++)
13;;        D[k][j][i] = D[k][j][i]+t;
14
15; CHECK: Processing InnerLoopId = 2 and OuterLoopId = 1
16; CHECK: Loops interchanged.
17
18; CHECK: Processing InnerLoopId = 1 and OuterLoopId = 0
19; CHECK: Loops interchanged.
20
21define void @interchange_08(i32 %t){
22entry:
23  br label %for.cond1.preheader
24
25for.cond1.preheader:                              ; preds = %for.inc15, %entry
26  %i.028 = phi i64 [ 0, %entry ], [ %inc16, %for.inc15 ]
27  br label %for.cond4.preheader
28
29for.cond4.preheader:                              ; preds = %for.inc12, %for.cond1.preheader
30  %j.027 = phi i64 [ 0, %for.cond1.preheader ], [ %inc13, %for.inc12 ]
31  br label %for.body6
32
33for.body6:                                        ; preds = %for.body6, %for.cond4.preheader
34  %k.026 = phi i64 [ 0, %for.cond4.preheader ], [ %inc, %for.body6 ]
35  %arrayidx8 = getelementptr inbounds [100 x [100 x [100 x i32]]], [100 x [100 x [100 x i32]]]* @D, i64 0, i64 %k.026, i64 %j.027, i64 %i.028
36  %0 = load i32, i32* %arrayidx8
37  %add = add nsw i32 %0, %t
38  store i32 %add, i32* %arrayidx8
39  %inc = add nuw nsw i64 %k.026, 1
40  %exitcond = icmp eq i64 %inc, 100
41  br i1 %exitcond, label %for.inc12, label %for.body6
42
43for.inc12:                                        ; preds = %for.body6
44  %inc13 = add nuw nsw i64 %j.027, 1
45  %exitcond29 = icmp eq i64 %inc13, 100
46  br i1 %exitcond29, label %for.inc15, label %for.cond4.preheader
47
48for.inc15:                                        ; preds = %for.inc12
49  %inc16 = add nuw nsw i64 %i.028, 1
50  %exitcond30 = icmp eq i64 %inc16, 100
51  br i1 %exitcond30, label %for.end17, label %for.cond1.preheader
52
53for.end17:                                        ; preds = %for.inc15
54  ret void
55}
56