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
|
; RUN: opt %loadPolly -polly-dependences -analyze -basicaa < %s | FileCheck %s
;
; CHECK: Reduction dependences:
; CHECK: { Stmt_for_inc[i0, i1] -> Stmt_for_inc[i0, 1 + i1] : i0 <= 99 and i0 >= 0 and i1 <= 98 and i1 >= 0 }
;
; int f(int * __restrict__ A) {
; int i, j, sum = 0;
; for (k = 0; k < 37; k = g(k)) {
; for (i = 0; i < 100; i++) {
; sum *= 2;
; for (j = 0; j < 100; j++) {
; sum += A[i+j];
; }
; }
; }
; return sum;
; }
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
declare i64 @g(i64)
define i32 @f(i32* noalias %A) {
entry:
%sum.04.reg2mem = alloca i32
%sum.12.reg2mem = alloca i32
br label %entry.split
entry.split: ; preds = %entry
store i32 0, i32* %sum.04.reg2mem
br label %for.body_outer_split
for.body_outer_split: ; preds = %entry.split, %for.inc5
%indvars.ivK = phi i64 [ 0, %entry.split ], [ %incK, %for.bos2 ]
br label %for.body_outer
for.body_outer: ; preds = %for.body_outer_split
%incK = call i64 @g(i64 %indvars.ivK)
%exitcondK = icmp eq i64 %incK, 100
br i1 %exitcondK, label %for.end7, label %for.body
for.body: ; preds = %for.inc5, %for.body_outer
%indvars.iv23 = phi i64 [ 0, %for.body_outer ], [ %3, %for.inc5 ]
%sum.04.reload = load i32, i32* %sum.04.reg2mem
%mul = shl nsw i32 %sum.04.reload, 1
store i32 %mul, i32* %sum.12.reg2mem
br label %for.inc
for.inc: ; preds = %for.inc, %for.body
%indvars.iv1 = phi i64 [ 0, %for.body ], [ %1, %for.inc ]
%sum.12.reload = load i32, i32* %sum.12.reg2mem
%0 = add i64 %indvars.iv23, %indvars.iv1
%arrayidx = getelementptr i32, i32* %A, i64 %0
%tmp5 = load i32, i32* %arrayidx, align 4
%add4 = add nsw i32 %tmp5, %sum.12.reload
%1 = add nuw nsw i64 %indvars.iv1, 1
%exitcond1 = icmp eq i64 %1, 100
store i32 %add4, i32* %sum.12.reg2mem
br i1 %exitcond1, label %for.inc5, label %for.inc
for.inc5: ; preds = %for.inc
%2 = load i32, i32* %sum.12.reg2mem
%3 = add nuw nsw i64 %indvars.iv23, 1
%exitcond2 = icmp eq i64 %3, 100
store i32 %2, i32* %sum.04.reg2mem
br i1 %exitcond2, label %for.bos2, label %for.body
for.bos2:
br label %for.body_outer_split
for.end7: ; preds = %for.inc5
%4 = load i32, i32* %sum.04.reg2mem
ret i32 %4
}
|
