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
| ; RUN: opt -S %loadPolly -basicaa -polly-dependences-analysis-type=value-based -polly-dce -polly-ast -analyze < %s | FileCheck %s -check-prefix=CHECK-DCE
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[0] = 1;
;
; for(i = 0; i < 100; i++ )
; A[i+1] = A[i] * 2;
;
; for (i = 0; i < 200; i++ )
; A[i] = B[i] * 2;
define void @main() nounwind uwtable {
entry:
%A = alloca [200 x i32], align 16
%B = alloca [200 x i32], align 16
%A.zero = getelementptr [200 x i32], [200 x i32]* %A, i64 0, i64 0
store i32 1, i32* %A.zero, align 4
br label %for.body.1
for.body.1:
%indvar.1 = phi i64 [ 0, %entry ], [ %indvar.next.1, %for.body.1 ]
%indvar.next.1 = add i64 %indvar.1, 1
%A.current.1 = getelementptr [200 x i32], [200 x i32]* %A, i64 0, i64 %indvar.1
%val1.1 = load i32, i32* %A.current.1, align 4
%val2.1 = mul i32 %val1.1, 2
%A.next.1 = getelementptr [200 x i32], [200 x i32]* %A, i64 0, i64 %indvar.next.1
store i32 %val2.1, i32* %A.next.1, align 4
%exitcond.1 = icmp ne i64 %indvar.next.1, 100
br i1 %exitcond.1, label %for.body.1, label %exit.1
exit.1:
br label %for.body.2
for.body.2:
%indvar.2 = phi i64 [ 0, %exit.1 ], [ %indvar.next.2, %for.body.2 ]
%B.current.2 = getelementptr [200 x i32], [200 x i32]* %B, i64 0, i64 %indvar.2
%val1.2 = load i32, i32* %B.current.2, align 4
%val2.2 = mul i32 %val1.2, 2
%A.current.2 = getelementptr [200 x i32], [200 x i32]* %A, i64 0, i64 %indvar.2
store i32 %val2.2, i32* %A.current.2, align 4
%indvar.next.2 = add i64 %indvar.2, 1
%exitcond.2 = icmp ne i64 %indvar.next.2, 200
br i1 %exitcond.2, label %for.body.2, label %exit.3
exit.3:
ret void
}
; CHECK-DCE: for (int c0 = 0; c0 <= 199; c0 += 1)
; CHECK-DCE: Stmt_for_body_2(c0);
|