1 ; RUN: opt %loadPolly -polly-scops -analyze < %s | FileCheck %s --check-prefix=AFFINE
2 ; RUN: opt %loadPolly -polly-scops -polly-allow-nonaffine -analyze < %s | FileCheck %s --check-prefix=NONAFFINE
4 ; The loop for.body => for.inc has an unpredictable iteration count could due to
5 ; the undef start value that it is compared to. Therefore the array element
6 ; %arrayidx101 that depends on that exit value cannot be affine.
7 ; Derived from test-suite/MultiSource/Benchmarks/BitBench/uuencode/uuencode.c
9 define void @encode_line(i8* nocapture readonly %input, i32 %octets, i64 %p) {
11 br i1 undef, label %for.body, label %for.end
14 %indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ %p, %entry ]
15 %octets.addr.02 = phi i32 [ undef, %for.inc ], [ %octets, %entry ]
16 br i1 false, label %for.inc, label %if.else
19 %cond = icmp eq i32 %octets.addr.02, 2
20 br i1 %cond, label %if.then84, label %for.end
23 %0 = add nsw i64 %indvars.iv, 1
24 %arrayidx101 = getelementptr inbounds i8, i8* %input, i64 %0
25 store i8 42, i8* %arrayidx101, align 1
29 %cmp = icmp sgt i32 %octets.addr.02, 3
30 %indvars.iv.next = add nsw i64 %indvars.iv, 3
31 br i1 %cmp, label %for.body, label %for.end
37 ; AFFINE: Region: %if.else---%for.end
39 ; AFFINE: Statements {
40 ; AFFINE-NEXT: Stmt_if_then84
41 ; AFFINE-NEXT: Domain :=
42 ; AFFINE-NEXT: [octets, p_1, p] -> { Stmt_if_then84[] : octets = 2 };
43 ; AFFINE-NEXT: Schedule :=
44 ; AFFINE-NEXT: [octets, p_1, p] -> { Stmt_if_then84[] -> [] };
45 ; AFFINE-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
46 ; AFFINE-NEXT: [octets, p_1, p] -> { Stmt_if_then84[] -> MemRef_indvars_iv[] };
47 ; AFFINE-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
48 ; AFFINE-NEXT: [octets, p_1, p] -> { Stmt_if_then84[] -> MemRef_input[1 + p] };
51 ; NONAFFINE: Region: %for.body---%for.end
53 ; NONAFFINE: Statements {
54 ; NONAFFINE-NEXT: Stmt_for_body
55 ; NONAFFINE-NEXT: Domain :=
56 ; NONAFFINE-NEXT: [octets] -> { Stmt_for_body[0] };
57 ; NONAFFINE-NEXT: Schedule :=
58 ; NONAFFINE-NEXT: [octets] -> { Stmt_for_body[i0] -> [0, 0] };
59 ; NONAFFINE-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
60 ; NONAFFINE-NEXT: [octets] -> { Stmt_for_body[i0] -> MemRef_indvars_iv[] };
61 ; NONAFFINE-NEXT: Stmt_if_then84
62 ; NONAFFINE-NEXT: Domain :=
63 ; NONAFFINE-NEXT: [octets] -> { Stmt_if_then84[] : octets = 2 };
64 ; NONAFFINE-NEXT: Schedule :=
65 ; NONAFFINE-NEXT: [octets] -> { Stmt_if_then84[] -> [1, 0] };
66 ; NONAFFINE-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
67 ; NONAFFINE-NEXT: [octets] -> { Stmt_if_then84[] -> MemRef_indvars_iv[] };
68 ; NONAFFINE-NEXT: MayWriteAccess := [Reduction Type: NONE] [Scalar: 0]
69 ; NONAFFINE-NEXT: [octets] -> { Stmt_if_then84[] -> MemRef_input[o0] };