1 ; RUN: opt -lcssa -S %s | FileCheck %s
2 source_filename = "small.c"
4 @a = common dso_local global i32 0, align 4, !dbg !0
7 define dso_local void @f() !dbg !10 {
9 %0 = load i32, i32* @a, align 4, !dbg !17
10 %tobool1 = icmp eq i32 %0, 0, !dbg !18
11 br i1 %tobool1, label %for.end, label %for.inc.lr.ph, !dbg !18
13 for.inc.lr.ph: ; preds = %entry
14 br label %for.inc, !dbg !18
16 for.inc: ; preds = %for.inc, %for.inc.lr.ph
17 %1 = phi i32 [ %0, %for.inc.lr.ph ], [ %inc, %for.inc ]
18 call void @llvm.dbg.label(metadata !14), !dbg !19
19 %inc = add nsw i32 %1, 1, !dbg !20
20 %tobool = icmp eq i32 %inc, 0, !dbg !18
21 br i1 %tobool, label %for.cond.for.end_crit_edge, label %for.inc, !dbg !18, !llvm.loop !21
23 for.cond.for.end_crit_edge: ; preds = %for.inc
24 store i32 %inc, i32* @a, align 4, !dbg !17
25 br label %for.end, !dbg !18
27 for.end: ; preds = %entry, %for.cond.for.end_crit_edge
31 ; Function Attrs: nounwind readnone speculatable
32 declare void @llvm.dbg.label(metadata) #0
34 attributes #0 = { nounwind readnone speculatable }
37 !llvm.module.flags = !{!7, !8, !9}
39 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
40 !1 = distinct !DIGlobalVariable(name: "a", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)
41 !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 7.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
42 !3 = !DIFile(filename: "small.c", directory: "./")
45 !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
46 !7 = !{i32 2, !"Dwarf Version", i32 4}
47 !8 = !{i32 2, !"Debug Info Version", i32 3}
48 !9 = !{i32 1, !"wchar_size", i32 4}
49 !10 = distinct !DISubprogram(name: "f", scope: !3, file: !3, line: 3, type: !11, isLocal: false, isDefinition: true, scopeLine: 4, isOptimized: true, unit: !2, retainedNodes: !13)
50 !11 = !DISubroutineType(types: !12)
53 !14 = !DILabel(scope: !15, name: "L", file: !3, line: 6)
54 !15 = distinct !DILexicalBlock(scope: !16, file: !3, line: 5, column: 3)
55 !16 = distinct !DILexicalBlock(scope: !10, file: !3, line: 5, column: 3)
56 !17 = !DILocation(line: 5, column: 10, scope: !15)
57 !18 = !DILocation(line: 5, column: 3, scope: !16)
58 !19 = !DILocation(line: 6, column: 3, scope: !15)
59 !20 = !DILocation(line: 5, column: 14, scope: !15)
60 !21 = distinct !{!21, !18, !22}
61 !22 = !DILocation(line: 6, column: 5, scope: !16)
62 !23 = !DILocation(line: 7, column: 1, scope: !10)