|
236
|
1 ; RUN: opt %loadPolly -polly-print-delicm -disable-output < %s | FileCheck %s
|
|
150
|
2 ;
|
|
|
3 ; void func(double *A) {
|
|
|
4 ; for (int j = 0; j < 2; j += 1) { /* outer */
|
|
|
5 ; double phi = 0.0;
|
|
|
6 ; for (int i = 0; i < 4; i += 1) /* reduction */
|
|
|
7 ; phi += 4.2;
|
|
|
8 ; if (phi < 0.0)
|
|
|
9 ; A[j] = undef;
|
|
|
10 ; A[j] = phi;
|
|
|
11 ; }
|
|
|
12 ; }
|
|
|
13 ;
|
|
|
14 ; The MAY_WRITE in reduction.exit.true avoids that anything can be mapped to
|
|
|
15 ; A[j] because it would be overwritten by that MAY_WRITE just before the final
|
|
|
16 ; MUST_WRITE. Also nothing can be map to the MAY_WRITE itself because it is a
|
|
|
17 ; MAY_WRITE.
|
|
|
18 ;
|
|
252
|
19 define void @func(ptr noalias nonnull %A) {
|
|
150
|
20 entry:
|
|
|
21 %fsomeval = fadd double 21.0, 21.0
|
|
|
22 br label %outer.preheader
|
|
|
23
|
|
|
24 outer.preheader:
|
|
|
25 br label %outer.for
|
|
|
26
|
|
|
27 outer.for:
|
|
|
28 %j = phi i32 [0, %outer.preheader], [%j.inc, %outer.inc]
|
|
|
29 %j.cmp = icmp slt i32 %j, 2
|
|
|
30 br i1 %j.cmp, label %reduction.preheader, label %outer.exit
|
|
|
31
|
|
|
32
|
|
|
33 reduction.preheader:
|
|
|
34 br label %reduction.for
|
|
|
35
|
|
|
36 reduction.for:
|
|
|
37 %i = phi i32 [0, %reduction.preheader], [%i.inc, %reduction.inc]
|
|
|
38 %phi = phi double [0.0, %reduction.preheader], [%add, %reduction.inc]
|
|
|
39 %i.cmp = icmp slt i32 %i, 4
|
|
|
40 br i1 %i.cmp, label %body, label %reduction.exit
|
|
|
41
|
|
|
42
|
|
|
43
|
|
|
44 body:
|
|
|
45 %add = fadd double %phi, 4.2
|
|
|
46 br label %reduction.inc
|
|
|
47
|
|
|
48
|
|
|
49
|
|
|
50 reduction.inc:
|
|
|
51 %i.inc = add nuw nsw i32 %i, 1
|
|
|
52 br label %reduction.for
|
|
|
53
|
|
|
54 reduction.exit:
|
|
252
|
55 %A_idx = getelementptr inbounds double, ptr %A, i32 %j
|
|
150
|
56 %phi.cmp = fcmp ogt double %phi, 0.0
|
|
|
57 br i1 %phi.cmp, label %reduction.exit.true, label %reduction.exit.unconditional
|
|
|
58
|
|
|
59 reduction.exit.true:
|
|
252
|
60 store double undef, ptr %A_idx
|
|
150
|
61 br label %reduction.exit.unconditional
|
|
|
62
|
|
|
63 reduction.exit.unconditional:
|
|
252
|
64 store double %phi, ptr %A_idx
|
|
150
|
65 br label %outer.inc
|
|
|
66
|
|
|
67
|
|
|
68
|
|
|
69 outer.inc:
|
|
|
70 %j.inc = add nuw nsw i32 %j, 1
|
|
|
71 br label %outer.for
|
|
|
72
|
|
|
73 outer.exit:
|
|
|
74 br label %return
|
|
|
75
|
|
|
76 return:
|
|
|
77 ret void
|
|
|
78 }
|
|
|
79
|
|
|
80
|
|
|
81 ; CHECK: Statistics {
|
|
|
82 ; CHECK: Compatible overwrites: 1
|
|
|
83 ; CHECK: }
|
|
|
84 ; CHECK: No modification has been made
|
