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1; RUN: opt -S -loop-rotate < %s | FileCheck %s
2; RUN: opt -S -loop-rotate -enable-mssa-loop-dependency=true -verify-memoryssa < %s | FileCheck %s
3source_filename = "/tmp/loop.c"
4target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
5target triple = "x86_64-apple-macosx10.13.0"
6
7; Function Attrs: nounwind ssp uwtable
8define void @f(float* %input, i64 %n, i64 %s) local_unnamed_addr #0 !dbg !8 {
9entry:
10  call void @llvm.dbg.value(metadata float* %input, metadata !15, metadata !DIExpression()), !dbg !20
11  call void @llvm.dbg.value(metadata i64 %n, metadata !16, metadata !DIExpression()), !dbg !21
12  call void @llvm.dbg.value(metadata i64 %s, metadata !17, metadata !DIExpression()), !dbg !22
13  call void @llvm.dbg.value(metadata i64 0, metadata !18, metadata !DIExpression()), !dbg !23
14  ; CHECK:   call void @llvm.dbg.value(metadata i64 0, metadata !18, metadata !DIExpression()), !dbg !23
15  ; CHECK-NOT:   call void @llvm.dbg.value(metadata i64 0, metadata !18, metadata !DIExpression()), !dbg !23
16  br label %for.cond, !dbg !24
17
18for.cond:                                         ; preds = %for.body, %entry
19  ; CHECK: %i.02 = phi i64 [ 0, %for.body.lr.ph ], [ %add, %for.body ]
20  %i.0 = phi i64 [ 0, %entry ], [ %add, %for.body ]
21  call void @llvm.dbg.value(metadata i64 %i.0, metadata !18, metadata !DIExpression()), !dbg !23
22  %cmp = icmp slt i64 %i.0, %n, !dbg !25
23  br i1 %cmp, label %for.body, label %for.cond.cleanup, !dbg !27
24
25for.cond.cleanup:                                 ; preds = %for.cond
26  ret void, !dbg !28
27
28for.body:                                         ; preds = %for.cond
29  %arrayidx = getelementptr inbounds float, float* %input, i64 %i.0, !dbg !29
30  %0 = load float, float* %arrayidx, align 4, !dbg !29, !tbaa !30
31  call void @bar(float %0), !dbg !34
32  %add = add nsw i64 %i.0, %s, !dbg !35
33  call void @llvm.dbg.value(metadata i64 %add, metadata !18, metadata !DIExpression()), !dbg !23
34  ; CHECK:   call void @llvm.dbg.value(metadata i64 %add, metadata !18, metadata !DIExpression()), !dbg !23
35  ; CHECK-NOT:   call void @llvm.dbg.value(metadata i64 %add, metadata !18, metadata !DIExpression()), !dbg !23
36  br label %for.cond, !dbg !36, !llvm.loop !37
37}
38
39declare void @bar(float) local_unnamed_addr #1
40
41; Function Attrs: nounwind readnone speculatable
42declare void @llvm.dbg.value(metadata, metadata, metadata) #2
43
44attributes #0 = { nounwind ssp uwtable }
45attributes #2 = { nounwind readnone speculatable }
46
47!llvm.dbg.cu = !{!0}
48!llvm.module.flags = !{!3, !4, !5, !6}
49!llvm.ident = !{!7}
50
51!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0 (trunk 316689) (llvm/trunk 316685)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
52!1 = !DIFile(filename: "/tmp/loop.c", directory: "/Data/llvm")
53!2 = !{}
54!3 = !{i32 2, !"Dwarf Version", i32 4}
55!4 = !{i32 2, !"Debug Info Version", i32 3}
56!5 = !{i32 1, !"wchar_size", i32 4}
57!6 = !{i32 7, !"PIC Level", i32 2}
58!7 = !{!"clang version 6.0.0 (trunk 316689) (llvm/trunk 316685)"}
59!8 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 2, type: !9, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !14)
60!9 = !DISubroutineType(types: !10)
61!10 = !{null, !11, !13, !13}
62!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64)
63!12 = !DIBasicType(name: "float", size: 32, encoding: DW_ATE_float)
64!13 = !DIBasicType(name: "long long int", size: 64, encoding: DW_ATE_signed)
65!14 = !{!15, !16, !17, !18}
66!15 = !DILocalVariable(name: "input", arg: 1, scope: !8, file: !1, line: 2, type: !11)
67!16 = !DILocalVariable(name: "n", arg: 2, scope: !8, file: !1, line: 2, type: !13)
68!17 = !DILocalVariable(name: "s", arg: 3, scope: !8, file: !1, line: 2, type: !13)
69!18 = !DILocalVariable(name: "i", scope: !19, file: !1, line: 3, type: !13)
70!19 = distinct !DILexicalBlock(scope: !8, file: !1, line: 3, column: 3)
71!20 = !DILocation(line: 2, column: 15, scope: !8)
72!21 = !DILocation(line: 2, column: 32, scope: !8)
73!22 = !DILocation(line: 2, column: 45, scope: !8)
74!23 = !DILocation(line: 3, column: 18, scope: !19)
75!24 = !DILocation(line: 3, column: 8, scope: !19)
76!25 = !DILocation(line: 3, column: 26, scope: !26)
77!26 = distinct !DILexicalBlock(scope: !19, file: !1, line: 3, column: 3)
78!27 = !DILocation(line: 3, column: 3, scope: !19)
79!28 = !DILocation(line: 5, column: 1, scope: !8)
80!29 = !DILocation(line: 4, column: 9, scope: !26)
81!30 = !{!31, !31, i64 0}
82!31 = !{!"float", !32, i64 0}
83!32 = !{!"omnipotent char", !33, i64 0}
84!33 = !{!"Simple C/C++ TBAA"}
85!34 = !DILocation(line: 4, column: 5, scope: !26)
86!35 = !DILocation(line: 3, column: 31, scope: !26)
87!36 = !DILocation(line: 3, column: 3, scope: !26)
88!37 = distinct !{!37, !27, !38}
89!38 = !DILocation(line: 4, column: 17, scope: !19)
90