1; RUN: opt -S -loop-vectorize -force-vector-width=4 -force-vector-interleave=1 < %s | FileCheck --check-prefix=DBG_VALUE --check-prefix=LOOPVEC_4_1 %s
2; RUN: opt -S -loop-vectorize -force-vector-width=2 -force-vector-interleave=3 < %s | FileCheck --check-prefix=DBG_VALUE --check-prefix=LOOPVEC_2_3 %s
3; RUN: opt -S -loop-unroll  -unroll-count=5 < %s | FileCheck --check-prefix=DBG_VALUE --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=DBG_VALUE --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
19declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
20
21define void @_Z3foov() local_unnamed_addr #0 !dbg !6 {
22  %1 = load i32*, i32** @b, align 8, !dbg !8, !tbaa !9
23  %2 = load i32*, i32** @a, align 8, !dbg !13, !tbaa !9
24  br label %3, !dbg !14
25
26; <label>:3:                                      ; preds = %3, %0
27  %indvars.iv = phi i64 [ 0, %0 ], [ %indvars.iv.next, %3 ]
28  %4 = getelementptr inbounds i32, i32* %1, i64 %indvars.iv, !dbg !8
29  %5 = load i32, i32* %4, align 4, !dbg !8, !tbaa !15
30  %6 = getelementptr inbounds i32, i32* %2, i64 %indvars.iv, !dbg !13
31  %7 = load i32, i32* %6, align 4, !dbg !17, !tbaa !15
32  %8 = add nsw i32 %7, %5, !dbg !17
33;DBG_VALUE: call void @llvm.dbg.declare{{.*}}!dbg ![[DBG:[0-9]*]]
34  call void @llvm.dbg.declare(metadata i32 %8, metadata !22, metadata !DIExpression()), !dbg !17
35  store i32 %8, i32* %6, align 4, !dbg !17, !tbaa !15
36  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !18
37  %exitcond = icmp eq i64 %indvars.iv.next, 4096, !dbg !19
38  br i1 %exitcond, label %9, label %3, !dbg !14, !llvm.loop !20
39
40; <label>:9:                                      ; preds = %3
41  ret void, !dbg !21
42}
43
44;DBG_VALUE: ![[TOP:[0-9]*]] = distinct !DISubprogram(name: "foo"
45;LOOPVEC_4_1: discriminator: 17
46;LOOPVEC_2_3: discriminator: 25
47;LOOPUNROLL_5: discriminator: 21
48; When unrolling after loop vectorize, both vec_body and remainder loop
49; are unrolled.
50;LOOPVEC_UNROLL: discriminator: 9
51;LOOPVEC_UNROLL: discriminator: 385
52;DBG_VALUE: ![[DBG]] = {{.*}}, scope: ![[TOP]]
53
54!llvm.dbg.cu = !{!0}
55!llvm.module.flags = !{!3, !4}
56
57!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, debugInfoForProfiling: true)
58!1 = !DIFile(filename: "a.cc", directory: "/")
59!3 = !{i32 2, !"Dwarf Version", i32 4}
60!4 = !{i32 2, !"Debug Info Version", i32 3}
61!6 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 4, unit: !0)
62!8 = !DILocation(line: 6, column: 13, scope: !6)
63!9 = !{!10, !10, i64 0}
64!10 = !{!"any pointer", !11, i64 0}
65!11 = !{!"omnipotent char", !12, i64 0}
66!12 = !{!"Simple C++ TBAA"}
67!13 = !DILocation(line: 6, column: 5, scope: !6)
68!14 = !DILocation(line: 5, column: 3, scope: !6)
69!15 = !{!16, !16, i64 0}
70!16 = !{!"int", !11, i64 0}
71!17 = !DILocation(line: 6, column: 10, scope: !6)
72!18 = !DILocation(line: 5, column: 30, scope: !6)
73!19 = !DILocation(line: 5, column: 21, scope: !6)
74!20 = distinct !{!20, !14}
75!21 = !DILocation(line: 7, column: 1, scope: !6)
76!22 = !DILocalVariable(name: "a", arg: 1, scope: !6, file: !1, line: 10)
77