1; RUN: opt %loadPolly -S -polly-codegen < %s | FileCheck %s
2;
3; We should only access (or compute the address of) "the first element" of %S
4; as it is a single struct not a struct array. The maximal access to S, thus
5; S->B[1023] is for ScalarEvolution an access with offset of 1423, 1023 for the
6; index inside the B part of S and 400 to skip the Dummy array in S. Note that
7; these numbers are relative to the actual type of &S->B[i] (char*) not to the
8; type of S (struct st *) or something else.
9;
10; Verify that we do not use the offset 1423 into a non existent S array when we
11; compute runtime alias checks but treat it as if it was a char array.
12;
13; CHECK: %polly.access.cast.S = bitcast %struct.st* %S to i8*
14; CHECK: %polly.access.S = getelementptr i8, i8* %polly.access.cast.S, i64 1424
15;
16;    struct st {
17;      int Dummy[100];
18;      char B[100];
19;    };
20;
21;    void jd(int *A, struct st *S) {
22;      for (int i = 0; i < 1024; i++)
23;        A[i] = S->B[i];
24;    }
25;
26target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
27
28%struct.st = type { [100 x i32], [100 x i8] }
29
30define void @jd(i32* %A, %struct.st* %S) {
31entry:
32  br label %for.cond
33
34for.cond:                                         ; preds = %for.inc, %entry
35  %indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
36  %exitcond = icmp ne i64 %indvars.iv, 1024
37  br i1 %exitcond, label %for.body, label %for.end
38
39for.body:                                         ; preds = %for.cond
40  %arrayidx = getelementptr inbounds %struct.st, %struct.st* %S, i64 0, i32 1, i64 %indvars.iv
41  %tmp = load i8, i8* %arrayidx, align 1
42  %conv = sext i8 %tmp to i32
43  %arrayidx2 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
44  store i32 %conv, i32* %arrayidx2, align 4
45  br label %for.inc
46
47for.inc:                                          ; preds = %for.body
48  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
49  br label %for.cond
50
51for.end:                                          ; preds = %for.cond
52  ret void
53}
54