1; RUN: opt < %s -disable-output "-passes=print<ddg>" 2>&1 | FileCheck %s
2
3; CHECK-LABEL: 'DDG' for loop 'test1.for.body':
4
5; CHECK: Node Address:[[N1:0x[0-9a-f]*]]:single-instruction
6; CHECK-NEXT: Instructions:
7; CHECK-NEXT:   %i2.03 = phi i64 [ 0, %for.body.lr.ph ], [ %inc2, %test1.for.body ]
8
9; CHECK: Node Address:[[N2:0x[0-9a-f]*]]:single-instruction
10; CHECK-NEXT: Instructions:
11; CHECK-NEXT:   %i1.02 = phi i64 [ 0, %for.body.lr.ph ], [ %inc, %test1.for.body ]
12
13; CHECK: Node Address:[[ROOT:0x[0-9a-f]*]]:root
14; CHECK-NEXT: Edges:
15; CHECK-NEXT:  [rooted] to [[N1]]
16; CHECK-NEXT:  [rooted] to [[N2]]
17
18
19;; // Two separate components in the graph. Root node must link to both.
20;; void test1(unsigned long n, float * restrict a, float * restrict b) {
21;;   for (unsigned long i1 = 0, i2 = 0; i1 < n; i1++, i2++) {
22;;     a[i1] = 1;
23;;     b[i2] = -1;
24;;   }
25;; }
26
27define void @test1(i64 %n, float* noalias %a, float* noalias %b) {
28entry:
29  %cmp1 = icmp ult i64 0, %n
30  br i1 %cmp1, label %for.body.lr.ph, label %for.end
31
32for.body.lr.ph:                                   ; preds = %entry
33  br label %test1.for.body
34
35test1.for.body:                                         ; preds = %for.body.lr.ph, %test1.for.body
36  %i2.03 = phi i64 [ 0, %for.body.lr.ph ], [ %inc2, %test1.for.body ]
37  %i1.02 = phi i64 [ 0, %for.body.lr.ph ], [ %inc, %test1.for.body ]
38  %arrayidx = getelementptr inbounds float, float* %a, i64 %i1.02
39  store float 1.000000e+00, float* %arrayidx, align 4
40  %arrayidx1 = getelementptr inbounds float, float* %b, i64 %i2.03
41  store float -1.000000e+00, float* %arrayidx1, align 4
42  %inc = add i64 %i1.02, 1
43  %inc2 = add i64 %i2.03, 1
44  %cmp = icmp ult i64 %inc, %n
45  br i1 %cmp, label %test1.for.body, label %for.cond.for.end_crit_edge
46
47for.cond.for.end_crit_edge:                       ; preds = %test1.for.body
48  br label %for.end
49
50for.end:                                          ; preds = %for.cond.for.end_crit_edge, %entry
51  ret void
52}
53