reduction_multiple_loops_array_sum.ll
2.82 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
; RUN: opt -basicaa %loadPolly -polly-dependences -analyze < %s | FileCheck %s
; RUN: opt -basicaa %loadPolly -polly-dependences -polly-dependences-analysis-level=reference-wise -analyze < %s | FileCheck %s
; RUN: opt -basicaa %loadPolly -polly-dependences -polly-dependences-analysis-level=access-wise -analyze < %s | FileCheck %s
;
; Verify that only the inner reduction like accesses cause reduction dependences
;
; CHECK: Reduction dependences:
; CHECK-NEXT: { Stmt_for_body3[i0, i1] -> Stmt_for_body3[i0, 1 + i1] : 0 <= i0 <= 99 and 0 <= i1 <= 98 }
;
; void f(int * restrict A, int * restrict sum) {
; int i, j, k;
; for (i = 0; i < 100; i++) {
; *sum *= 7;
; for (j = 0; j < 100; j++) {
; *sum += A[i+j];
; for (k = 0; k< 100; k++) {}
; }
; }
; }
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-n32-S64"
define void @f(i32* noalias %A, i32* noalias %sum) {
entry:
br label %for.cond
for.cond: ; preds = %for.inc11, %entry
%i.0 = phi i32 [ 0, %entry ], [ %inc12, %for.inc11 ]
%exitcond2 = icmp ne i32 %i.0, 100
br i1 %exitcond2, label %for.body, label %for.end13
for.body: ; preds = %for.cond
%tmp = load i32, i32* %sum, align 4
%mul = mul nsw i32 %tmp, 7
store i32 %mul, i32* %sum, align 4
br label %for.cond1
for.cond1: ; preds = %for.inc8, %for.body
%j.0 = phi i32 [ 0, %for.body ], [ %inc9, %for.inc8 ]
%exitcond1 = icmp ne i32 %j.0, 100
br i1 %exitcond1, label %for.body3, label %for.end10
for.body3: ; preds = %for.cond1
%add = add nsw i32 %i.0, %j.0
%arrayidx = getelementptr inbounds i32, i32* %A, i32 %add
%tmp3 = load i32, i32* %arrayidx, align 4
%tmp4 = load i32, i32* %sum, align 4
%add4 = add nsw i32 %tmp4, %tmp3
store i32 %add4, i32* %sum, align 4
br label %for.cond5
for.cond5: ; preds = %for.inc, %for.body3
%k.0 = phi i32 [ 0, %for.body3 ], [ %inc, %for.inc ]
%exitcond = icmp ne i32 %k.0, 100
br i1 %exitcond, label %for.body7, label %for.end
for.body7: ; preds = %for.cond5
br label %for.inc
for.inc: ; preds = %for.body7
%inc = add nsw i32 %k.0, 1
br label %for.cond5
for.end: ; preds = %for.cond5
br label %for.inc8
for.inc8: ; preds = %for.end
%inc9 = add nsw i32 %j.0, 1
br label %for.cond1
for.end10: ; preds = %for.cond1
br label %for.inc11
for.inc11: ; preds = %for.end10
%inc12 = add nsw i32 %i.0, 1
br label %for.cond
for.end13: ; preds = %for.cond
ret void
}