1 ; RUN: opt %s -S -o - -passes=loop-unroll | FileCheck %s
2 ; RUN: opt %s -S -o - -passes=loop-unroll --try-experimental-debuginfo-iterators | FileCheck %s
3 ; generated at -O3 from:
5 ; for (int i = 1; i <=32; i <<=2 )
8 source_filename = "/tmp/loop.c"
9 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
10 target triple = "x86_64-apple-macosx10.13.0"
12 ; Function Attrs: nounwind ssp uwtable
13 define void @f() local_unnamed_addr #0 !dbg !8 {
15 tail call void @llvm.dbg.value(metadata i32 1, metadata !12, metadata !DIExpression()), !dbg !15
16 br label %for.body, !dbg !16
18 for.cond.cleanup: ; preds = %for.body
21 for.body: ; preds = %entry, %for.body
22 %i.04 = phi i32 [ 1, %entry ], [ %shl, %for.body ]
23 tail call void @llvm.dbg.value(metadata i32 %i.04, metadata !12, metadata !DIExpression()), !dbg !15
24 %shr = ashr i32 %i.04, 1, !dbg !18
26 ; The loop gets unrolled entirely.
27 ; CHECK: #dbg_value(i32 1, !12, !DIExpression(), !15
28 ; CHECK: #dbg_value(i32 4, !12, !DIExpression(), !15
29 ; CHECK: #dbg_value(i32 16, !12, !DIExpression(), !15
30 ; CHECK: #dbg_value(i32 64, !12, !DIExpression(), !15
32 %call = tail call i32 (i32, ...) @bar(i32 %shr) #3, !dbg !20
33 %shl = shl i32 %i.04, 2, !dbg !21
34 tail call void @llvm.dbg.value(metadata i32 %shl, metadata !12, metadata !DIExpression()), !dbg !15
35 %cmp = icmp slt i32 %shl, 33, !dbg !22
36 br i1 %cmp, label %for.body, label %for.cond.cleanup, !dbg !16, !llvm.loop !23
39 declare i32 @bar(...) local_unnamed_addr
41 ; Function Attrs: nounwind readnone speculatable
42 declare void @llvm.dbg.value(metadata, metadata, metadata) #2
44 attributes #0 = { nounwind ssp uwtable }
45 attributes #2 = { nounwind readnone speculatable }
46 attributes #3 = { nounwind }
49 !llvm.module.flags = !{!3, !4, !5, !6}
52 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0 (trunk 317113) (llvm/trunk 317122)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
53 !1 = !DIFile(filename: "/tmp/loop.c", directory: "/Data/llvm")
55 !3 = !{i32 2, !"Dwarf Version", i32 4}
56 !4 = !{i32 2, !"Debug Info Version", i32 3}
57 !5 = !{i32 1, !"wchar_size", i32 4}
58 !6 = !{i32 7, !"PIC Level", i32 2}
59 !7 = !{!"clang version 6.0.0 (trunk 317113) (llvm/trunk 317122)"}
60 !8 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 1, type: !9, isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: true, unit: !0, retainedNodes: !11)
61 !9 = !DISubroutineType(types: !10)
64 !12 = !DILocalVariable(name: "i", scope: !13, file: !1, line: 2, type: !14)
65 !13 = distinct !DILexicalBlock(scope: !8, file: !1, line: 2, column: 3)
66 !14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
67 !15 = !DILocation(line: 2, column: 12, scope: !13)
68 !16 = !DILocation(line: 2, column: 3, scope: !13)
69 !17 = !DILocation(line: 4, column: 1, scope: !8)
70 !18 = !DILocation(line: 3, column: 10, scope: !19)
71 !19 = distinct !DILexicalBlock(scope: !13, file: !1, line: 2, column: 3)
72 !20 = !DILocation(line: 3, column: 5, scope: !19)
73 !21 = !DILocation(line: 2, column: 29, scope: !19)
74 !22 = !DILocation(line: 2, column: 21, scope: !19)
75 !23 = distinct !{!23, !16, !24}
76 !24 = !DILocation(line: 3, column: 13, scope: !13)