source: icGREP/icgrep-devel/llvm-3.8.0.src/test/Analysis/BasicAA/phi-speculation.ll @ 5027

Last change on this file since 5027 was 5027, checked in by cameron, 3 years ago

Upgrade to llvm 3.8

File size: 3.5 KB
Line 
1target datalayout =
2"e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
3
4; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
5
6; ptr_phi and ptr2_phi do not alias.
7; CHECK: test_noalias_1
8; CHECK: NoAlias: i32* %ptr2_phi, i32* %ptr_phi
9define i32 @test_noalias_1(i32* %ptr2, i32 %count, i32* %coeff) {
10entry:
11  %ptr = getelementptr inbounds i32, i32* %ptr2, i64 1
12  br label %while.body
13
14while.body:
15  %num = phi i32 [ %count, %entry ], [ %dec, %while.body ]
16  %ptr_phi = phi i32* [ %ptr, %entry ], [ %ptr_inc, %while.body ]
17  %ptr2_phi = phi i32* [ %ptr2, %entry ], [ %ptr2_inc, %while.body ]
18  %result.09 = phi i32 [ 0 , %entry ], [ %add, %while.body ]
19  %dec = add nsw i32 %num, -1
20  %0 = load i32, i32* %ptr_phi, align 4
21  store i32 %0, i32* %ptr2_phi, align 4
22  %1 = load i32, i32* %coeff, align 4
23  %2 = load i32, i32* %ptr_phi, align 4
24  %mul = mul nsw i32 %1, %2
25  %add = add nsw i32 %mul, %result.09
26  %tobool = icmp eq i32 %dec, 0
27  %ptr_inc = getelementptr inbounds i32, i32* %ptr_phi, i64 1
28  %ptr2_inc = getelementptr inbounds i32, i32* %ptr2_phi, i64 1
29  br i1 %tobool, label %the_exit, label %while.body
30
31the_exit:
32  ret i32 %add
33}
34
35; CHECK: test_noalias_2
36; CHECK: NoAlias: i32* %ptr_outer_phi, i32* %ptr_outer_phi2
37; CHECK: NoAlias: i32* %ptr2_phi, i32* %ptr_phi
38define i32 @test_noalias_2(i32* %ptr2, i32 %count, i32* %coeff) {
39entry:
40  %ptr = getelementptr inbounds i32, i32* %ptr2, i64 1
41  br label %outer.while.header
42
43outer.while.header:
44  %ptr_outer_phi = phi i32* [%ptr_inc_outer, %outer.while.backedge], [ %ptr, %entry]
45  %ptr_outer_phi2 = phi i32* [%ptr2_inc_outer, %outer.while.backedge], [ %ptr2, %entry]
46  %num.outer = phi i32 [ %count, %entry ], [ %dec.outer, %outer.while.backedge ]
47  br label %while.body
48
49while.body:
50  %num = phi i32 [ %count, %outer.while.header ], [ %dec, %while.body ]
51  %ptr_phi = phi i32* [ %ptr_outer_phi, %outer.while.header ], [ %ptr_inc, %while.body ]
52  %ptr2_phi = phi i32* [ %ptr_outer_phi2, %outer.while.header ], [ %ptr2_inc, %while.body ]
53  %result.09 = phi i32 [ 0 , %outer.while.header ], [ %add, %while.body ]
54  %dec = add nsw i32 %num, -1
55  %0 = load i32, i32* %ptr_phi, align 4
56  store i32 %0, i32* %ptr2_phi, align 4
57  %1 = load i32, i32* %coeff, align 4
58  %2 = load i32, i32* %ptr_phi, align 4
59  %mul = mul nsw i32 %1, %2
60  %add = add nsw i32 %mul, %result.09
61  %tobool = icmp eq i32 %dec, 0
62  %ptr_inc = getelementptr inbounds i32, i32* %ptr_phi, i64 1
63  %ptr2_inc = getelementptr inbounds i32, i32* %ptr2_phi, i64 1
64  br i1 %tobool, label %outer.while.backedge, label %while.body
65
66outer.while.backedge:
67  %ptr_inc_outer = getelementptr inbounds i32, i32* %ptr_phi, i64 1
68  %ptr2_inc_outer = getelementptr inbounds i32, i32* %ptr2_phi, i64 1
69  %dec.outer = add nsw i32 %num.outer, -1
70  %br.cond = icmp eq i32 %dec.outer, 0
71  br i1 %br.cond, label %the_exit, label %outer.while.header
72
73the_exit:
74  ret i32 %add
75}
76
77; CHECK: test_noalias_3
78; CHECK: MayAlias: i8* %ptr2_phi, i8* %ptr_phi
79define i32 @test_noalias_3(i8* noalias %x, i8* noalias %y, i8* noalias %z,
80                           i32 %count) {
81entry:
82  br label %while.body
83
84while.body:
85  %num = phi i32 [ %count, %entry ], [ %dec, %while.body ]
86  %ptr_phi = phi i8* [ %x, %entry ], [ %z, %while.body ]
87  %ptr2_phi = phi i8* [ %y, %entry ], [ %ptr_phi, %while.body ]
88  %dec = add nsw i32 %num, -1
89  %tobool = icmp eq i32 %dec, 0
90  br i1 %tobool, label %the_exit, label %while.body
91
92the_exit:
93  ret i32 1
94}
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