1; RUN: opt -S -loop-vectorize -force-vector-width=4 -force-vector-interleave=1 < %s | FileCheck --check-prefix=LOOPVEC_4_1 %s
2; RUN: opt -S -loop-vectorize -force-vector-width=2 -force-vector-interleave=3 < %s | FileCheck --check-prefix=LOOPVEC_2_3 %s
3; RUN: opt -S -loop-unroll  -unroll-count=5 < %s | FileCheck --check-prefix=LOOPUNROLL_5 %s
4; RUN: opt -S -loop-vectorize -force-vector-width=4 -force-vector-interleave=4 -loop-unroll -unroll-count=2 < %s | FileCheck --check-prefix=LOOPVEC_UNROLL %s
5
6; Test if vectorization/unroll factor is recorded in discriminator.
7;
8; Original source code:
9;  1 int *a;
10;  2 int *b;
11;  3
12;  4 void foo() {
13;  5   for (int i = 0; i < 4096; i++)
14;  6     a[i] += b[i];
15;  7 }
16
17@a = local_unnamed_addr global i32* null, align 8
18@b = local_unnamed_addr global i32* null, align 8
19
20define void @_Z3foov() local_unnamed_addr #0 !dbg !6 {
21  %1 = load i32*, i32** @b, align 8, !dbg !8, !tbaa !9
22  %2 = load i32*, i32** @a, align 8, !dbg !13, !tbaa !9
23  br label %3, !dbg !14
24
25; <label>:3:                                      ; preds = %3, %0
26  %indvars.iv = phi i64 [ 0, %0 ], [ %indvars.iv.next, %3 ]
27  %4 = getelementptr inbounds i32, i32* %1, i64 %indvars.iv, !dbg !8
28  %5 = load i32, i32* %4, align 4, !dbg !8, !tbaa !15
29  %6 = getelementptr inbounds i32, i32* %2, i64 %indvars.iv, !dbg !13
30  %7 = load i32, i32* %6, align 4, !dbg !17, !tbaa !15
31  %8 = add nsw i32 %7, %5, !dbg !17
32  store i32 %8, i32* %6, align 4, !dbg !17, !tbaa !15
33  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !18
34  %exitcond = icmp eq i64 %indvars.iv.next, 4096, !dbg !19
35  br i1 %exitcond, label %9, label %3, !dbg !14, !llvm.loop !20
36
37; <label>:9:                                      ; preds = %3
38  ret void, !dbg !21
39}
40
41;LOOPVEC_4_1: discriminator: 17
42;LOOPVEC_2_3: discriminator: 25
43;LOOPUNROLL_5: discriminator: 21
44; When unrolling after loop vectorize, both vec_body and remainder loop
45; are unrolled.
46;LOOPVEC_UNROLL: discriminator: 385
47;LOOPVEC_UNROLL: discriminator: 9
48
49!llvm.dbg.cu = !{!0}
50!llvm.module.flags = !{!3, !4}
51
52!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, debugInfoForProfiling: true)
53!1 = !DIFile(filename: "a.cc", directory: "/")
54!3 = !{i32 2, !"Dwarf Version", i32 4}
55!4 = !{i32 2, !"Debug Info Version", i32 3}
56!6 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 4, unit: !0)
57!8 = !DILocation(line: 6, column: 13, scope: !6)
58!9 = !{!10, !10, i64 0}
59!10 = !{!"any pointer", !11, i64 0}
60!11 = !{!"omnipotent char", !12, i64 0}
61!12 = !{!"Simple C++ TBAA"}
62!13 = !DILocation(line: 6, column: 5, scope: !6)
63!14 = !DILocation(line: 5, column: 3, scope: !6)
64!15 = !{!16, !16, i64 0}
65!16 = !{!"int", !11, i64 0}
66!17 = !DILocation(line: 6, column: 10, scope: !6)
67!18 = !DILocation(line: 5, column: 30, scope: !6)
68!19 = !DILocation(line: 5, column: 21, scope: !6)
69!20 = distinct !{!20, !14}
70!21 = !DILocation(line: 7, column: 1, scope: !6)
71