1; RUN: opt < %s -basic-aa -aa-eval -print-all-alias-modref-info -basic-aa-recphi -disable-output 2>&1 | FileCheck %s
2
3; CHECK-LABEL: Function: simple: 5 pointers, 0 call sites
4; CHECK:         NoAlias:      float* %src1, float* %src2
5; CHECK:         NoAlias:      float* %phi, float* %src1
6; CHECK:         MayAlias:     float* %phi, float* %src2
7; CHECK:         NoAlias:      float* %next, float* %src1
8; CHECK:         MayAlias:     float* %next, float* %src2
9; CHECK:         NoAlias:      float* %next, float* %phi
10; CHECK:         NoAlias:      float* %g, float* %src1
11; CHECK:         NoAlias:      float* %g, float* %src2
12; CHECK:         NoAlias:      float* %g, float* %phi
13; CHECK:         NoAlias:      float* %g, float* %next
14define void @simple(float *%src1, float * noalias %src2, i32 %n) nounwind {
15entry:
16  br label %loop
17
18loop:
19  %phi = phi float* [ %src2, %entry ], [ %next, %loop ]
20  %idx = phi i32 [ 0, %entry ], [ %idxn, %loop ]
21  %next = getelementptr inbounds float, float* %phi, i32 1
22  %g = getelementptr inbounds float, float* %src1, i32 3
23  %l = load float, float* %phi
24  %a = fadd float %l, 1.0
25  store float %a, float* %g
26  %idxn = add nsw nuw i32 %idx, 1
27  %cmp5 = icmp eq i32 %idxn, %n
28  br i1 %cmp5, label %end, label %loop
29
30end:
31  ret void
32}
33
34; CHECK-LABEL: Function: notmust: 6 pointers, 0 call sites
35; CHECK:        MustAlias:    [2 x i32]* %tab, i8* %0
36; CHECK:        PartialAlias: [2 x i32]* %tab, i32* %arrayidx
37; CHECK:        NoAlias:      i32* %arrayidx, i8* %0
38; CHECK:        MustAlias:    [2 x i32]* %tab, i32* %arrayidx1
39; CHECK:        MustAlias:    i32* %arrayidx1, i8* %0
40; CHECK:        NoAlias:      i32* %arrayidx, i32* %arrayidx1
41; CHECK:        MayAlias:     [2 x i32]* %tab, i32* %p.addr.05.i
42; CHECK:        MayAlias:     i32* %p.addr.05.i, i8* %0
43; CHECK:        MayAlias:     i32* %arrayidx, i32* %p.addr.05.i
44; CHECK:        MayAlias:     i32* %arrayidx1, i32* %p.addr.05.i
45; CHECK:        MayAlias:     [2 x i32]* %tab, i32* %incdec.ptr.i
46; CHECK:        NoAlias:      i32* %incdec.ptr.i, i8* %0
47; CHECK:        MayAlias:     i32* %arrayidx, i32* %incdec.ptr.i
48; CHECK:        NoAlias:      i32* %arrayidx1, i32* %incdec.ptr.i
49; CHECK:        NoAlias:      i32* %incdec.ptr.i, i32* %p.addr.05.i
50define i32 @notmust() nounwind {
51entry:
52  %tab = alloca [2 x i32], align 4
53  %0 = bitcast [2 x i32]* %tab to i8*
54  %arrayidx = getelementptr inbounds [2 x i32], [2 x i32]* %tab, i32 0, i32 1
55  store i32 0, i32* %arrayidx, align 4
56  %arrayidx1 = getelementptr inbounds [2 x i32], [2 x i32]* %tab, i32 0, i32 0
57  store i32 0, i32* %arrayidx1, align 4
58  %1 = add i32 1, 1
59  %cmp4.i = icmp slt i32 %1, 2
60  br i1 %cmp4.i, label %while.body.i, label %f.exit
61
62while.body.i: ; preds = %while.body.i, %entry
63  %2 = phi i32 [ 1, %while.body.i ], [ %1, %entry ]
64  %foo.06.i = phi i32 [ %sub.i, %while.body.i ], [ 2, %entry ]
65  %p.addr.05.i = phi i32* [ %incdec.ptr.i, %while.body.i ], [ %arrayidx1, %entry ]
66  %sub.i = sub nsw i32 %foo.06.i, %2
67  %incdec.ptr.i = getelementptr inbounds i32, i32* %p.addr.05.i, i32 1
68  store i32 %sub.i, i32* %p.addr.05.i, align 4
69  %cmp.i = icmp sgt i32 %sub.i, 1
70  br i1 %cmp.i, label %while.body.i, label %f.exit
71
72f.exit: ; preds = %entry, %while.body.i
73  %3 = load i32, i32* %arrayidx1, align 4
74  %cmp = icmp eq i32 %3, 2
75  %4 = load i32, i32* %arrayidx, align 4
76  %cmp4 = icmp eq i32 %4, 1
77  %or.cond = and i1 %cmp, %cmp4
78  br i1 %or.cond, label %if.end, label %if.then
79
80if.then: ; preds = %f.exit
81  unreachable
82
83if.end: ; preds = %f.exit
84  ret i32 0
85}
86