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
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
; RUN: opt %loadPolly -polly-print-ast -disable-output < %s | FileCheck %s
;#include <string.h>
;#define N 1024
;
;int A[N];
;
;void sequential_loops() {
; int i;
; for (i = 0; i < N/2; i++) {
; A[i] = 1;
; }
; for (i = N/2 ; i < N; i++) {
; A[i] = 2;
; }
;}
;
;int main () {
; int i;
; memset(A, 0, sizeof(int) * N);
;
; sequential_loops();
;
; for (i = 0; i < N; i++) {
; if (A[i] != 1 && i < N/2)
; return 1;
; if (A[i] != 2 && i >= N/2)
; return 1;
; }
;
; return 0;
;}
target datalayout = "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"
@A = common global [1024 x i32] zeroinitializer, align 4 ; <ptr> [#uses=5]
define void @sequential_loops() nounwind {
bb:
br label %bb1
bb1: ; preds = %bb3, %bb
%indvar1 = phi i64 [ %indvar.next2, %bb3 ], [ 0, %bb ]
%scevgep4 = getelementptr [1024 x i32], ptr @A, i64 0, i64 %indvar1
%exitcond3 = icmp ne i64 %indvar1, 512
br i1 %exitcond3, label %bb2, label %bb4
bb2: ; preds = %bb1
store i32 1, ptr %scevgep4
br label %bb3
bb3: ; preds = %bb2
%indvar.next2 = add i64 %indvar1, 1
br label %bb1
bb4: ; preds = %bb1
br label %bb5
bb5: ; preds = %bb7, %bb4
%indvar = phi i64 [ %indvar.next, %bb7 ], [ 0, %bb4 ]
%tmp = add i64 %indvar, 512
%scevgep = getelementptr [1024 x i32], ptr @A, i64 0, i64 %tmp
%exitcond = icmp ne i64 %indvar, 512
br i1 %exitcond, label %bb6, label %bb8
bb6: ; preds = %bb5
store i32 2, ptr %scevgep
br label %bb7
bb7: ; preds = %bb6
%indvar.next = add i64 %indvar, 1
br label %bb5
bb8: ; preds = %bb5
ret void
}
define i32 @main() nounwind {
bb:
call void @llvm.memset.p0.i64(ptr @A, i8 0, i64 4096, i32 1, i1 false)
call void @sequential_loops()
br label %bb1
bb1: ; preds = %bb15, %bb
%indvar = phi i64 [ %indvar.next, %bb15 ], [ 0, %bb ]
%i.0 = trunc i64 %indvar to i32
%scevgep = getelementptr [1024 x i32], ptr @A, i64 0, i64 %indvar
%tmp = icmp slt i32 %i.0, 1024
br i1 %tmp, label %bb2, label %bb16
bb2: ; preds = %bb1
%tmp3 = load i32, ptr %scevgep
%tmp4 = icmp ne i32 %tmp3, 1
br i1 %tmp4, label %bb5, label %bb8
bb5: ; preds = %bb2
%tmp6 = icmp slt i32 %i.0, 512
br i1 %tmp6, label %bb7, label %bb8
bb7: ; preds = %bb5
br label %bb17
bb8: ; preds = %bb5, %bb2
%tmp9 = load i32, ptr %scevgep
%tmp10 = icmp ne i32 %tmp9, 2
br i1 %tmp10, label %bb11, label %bb14
bb11: ; preds = %bb8
%tmp12 = icmp sge i32 %i.0, 512
br i1 %tmp12, label %bb13, label %bb14
bb13: ; preds = %bb11
br label %bb17
bb14: ; preds = %bb11, %bb8
br label %bb15
bb15: ; preds = %bb14
%indvar.next = add i64 %indvar, 1
br label %bb1
bb16: ; preds = %bb1
br label %bb17
bb17: ; preds = %bb16, %bb13, %bb7
%.0 = phi i32 [ 1, %bb7 ], [ 1, %bb13 ], [ 0, %bb16 ]
ret i32 %.0
}
declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i32, i1) nounwind
; CHECK: {
; CHECK: for (int c0 = 0; c0 <= 511; c0 += 1)
; CHECK: Stmt_bb2(c0);
; CHECK: for (int c0 = 0; c0 <= 511; c0 += 1)
; CHECK: Stmt_bb6(c0);
; CHECK: }
|
