1; RUN: opt < %s -analyze -delinearize | FileCheck %s
2
3; extern void bar(long n, long m, double A[n][m]);
4;
5; void foo(long a, long b) {
6;   for (long n = 1; n < a; ++n)
7;   for (long m = 1; m < b; ++m) {
8;     double A[n][m];
9;     for (long i = 0; i < n; i++)
10;       for (long j = 0; j < m; j++)
11;         A[i][j] = 1.0;
12;     bar(n, m, A);
13;   }
14; }
15
16; AddRec: {{%vla.us,+,{8,+,8}<%for.cond7.preheader.lr.ph.split.us.us>}<%for.body9.lr.ph.us.us>,+,8}<%for.body9.us.us>
17; CHECK: Base offset: %vla.us
18; CHECK: ArrayDecl[UnknownSize][{1,+,1}<%for.cond7.preheader.lr.ph.split.us.us>] with elements of sizeof(double) bytes.
19; CHECK: ArrayRef[{0,+,1}<nuw><nsw><%for.body9.lr.ph.us.us>][{0,+,1}<nuw><nsw><%for.body9.us.us>]
20
21define void @foo(i64 %a, i64 %b) nounwind uwtable {
22entry:
23  %cmp43 = icmp sgt i64 %a, 1
24  br i1 %cmp43, label %for.cond1.preheader.lr.ph, label %for.end19
25
26for.cond1.preheader.lr.ph:                        ; preds = %entry
27  %cmp224 = icmp sgt i64 %b, 1
28  br label %for.cond1.preheader
29
30for.cond1.preheader:                              ; preds = %for.inc17, %for.cond1.preheader.lr.ph
31  %indvars.iv51 = phi i64 [ 1, %for.cond1.preheader.lr.ph ], [ %indvars.iv.next52, %for.inc17 ]
32  br i1 %cmp224, label %for.cond7.preheader.lr.ph.split.us.us, label %for.inc17
33
34for.end13.us:                                     ; preds = %for.inc11.us.us
35  call void @bar(i64 %indvars.iv51, i64 %indvars.iv48, double* %vla.us) nounwind
36  call void @llvm.stackrestore(i8* %1)
37  %indvars.iv.next49 = add i64 %indvars.iv48, 1
38  %exitcond54 = icmp eq i64 %indvars.iv.next49, %b
39  br i1 %exitcond54, label %for.inc17, label %for.cond7.preheader.lr.ph.split.us.us
40
41for.inc11.us.us:                                  ; preds = %for.body9.us.us
42  %inc12.us.us = add nsw i64 %i.023.us.us, 1
43  %exitcond53 = icmp eq i64 %inc12.us.us, %indvars.iv51
44  br i1 %exitcond53, label %for.end13.us, label %for.body9.lr.ph.us.us
45
46for.body9.lr.ph.us.us:                            ; preds = %for.cond7.preheader.lr.ph.split.us.us, %for.inc11.us.us
47  %i.023.us.us = phi i64 [ 0, %for.cond7.preheader.lr.ph.split.us.us ], [ %inc12.us.us, %for.inc11.us.us ]
48  %0 = mul nsw i64 %i.023.us.us, %indvars.iv48
49  br label %for.body9.us.us
50
51for.body9.us.us:                                  ; preds = %for.body9.us.us, %for.body9.lr.ph.us.us
52  %j.021.us.us = phi i64 [ 0, %for.body9.lr.ph.us.us ], [ %inc.us.us, %for.body9.us.us ]
53  %arrayidx.sum.us.us = add i64 %j.021.us.us, %0
54  %arrayidx10.us.us = getelementptr inbounds double* %vla.us, i64 %arrayidx.sum.us.us
55  store double 1.000000e+00, double* %arrayidx10.us.us, align 8
56  %inc.us.us = add nsw i64 %j.021.us.us, 1
57  %exitcond50 = icmp eq i64 %inc.us.us, %indvars.iv48
58  br i1 %exitcond50, label %for.inc11.us.us, label %for.body9.us.us
59
60for.cond7.preheader.lr.ph.split.us.us:            ; preds = %for.cond1.preheader, %for.end13.us
61  %indvars.iv48 = phi i64 [ %indvars.iv.next49, %for.end13.us ], [ 1, %for.cond1.preheader ]
62  %1 = call i8* @llvm.stacksave()
63  %2 = mul nuw i64 %indvars.iv48, %indvars.iv51
64  %vla.us = alloca double, i64 %2, align 16
65  br label %for.body9.lr.ph.us.us
66
67for.inc17:                                        ; preds = %for.end13.us, %for.cond1.preheader
68  %indvars.iv.next52 = add i64 %indvars.iv51, 1
69  %exitcond55 = icmp eq i64 %indvars.iv.next52, %a
70  br i1 %exitcond55, label %for.end19, label %for.cond1.preheader
71
72for.end19:                                        ; preds = %for.inc17, %entry
73  ret void
74}
75
76declare i8* @llvm.stacksave() nounwind
77declare void @bar(i64, i64, double*)
78declare void @llvm.stackrestore(i8*) nounwind
79