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134
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1 ; RUN: opt -instcombine %s -o - -S | FileCheck %s
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2 ; typedef struct v *v_t;
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3 ; struct v {
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4 ; unsigned long long p;
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5 ; };
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6 ;
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7 ; void f(v_t object, unsigned long long *start) {
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8 ; unsigned head_size;
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9 ; unsigned long long orig_start;
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10 ; unsigned long long offset;
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11 ; orig_start = *start;
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12 ; for (offset = orig_start - (unsigned long long)(1 << 12); head_size;
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13 ; offset -= (unsigned long long)(1 << 12), head_size -= (1 << 12))
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14 ; use(offset, (object));
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15 ; }
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16 source_filename = "test.i"
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17 target datalayout = "e-m:o-p:32:32-f64:32:64-v64:32:64-v128:32:128-a:0:32-n32-S32"
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18 target triple = "thumbv7s-apple-ios5.0.0"
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19
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20 %struct.vm_object = type { i64 }
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21
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22 ; Function Attrs: nounwind ssp
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23 define void @f(%struct.vm_object* %object, i64* nocapture readonly %start) local_unnamed_addr #0 !dbg !11 {
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24 entry:
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25 tail call void @llvm.dbg.value(metadata %struct.vm_object* %object, metadata !21, metadata !DIExpression()), !dbg !27
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26 tail call void @llvm.dbg.value(metadata i64* %start, metadata !22, metadata !DIExpression()), !dbg !28
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27 %0 = load i64, i64* %start, align 4, !dbg !29
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28 tail call void @llvm.dbg.value(metadata i64 %0, metadata !25, metadata !DIExpression()), !dbg !30
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29 %offset.08 = add i64 %0, -4096
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30 tail call void @llvm.dbg.value(metadata i64 %offset.08, metadata !26, metadata !DIExpression()), !dbg !31
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31 tail call void @llvm.dbg.value(metadata i32 undef, metadata !23, metadata !DIExpression()), !dbg !32
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32 br i1 undef, label %for.end, label %for.body.lr.ph, !dbg !32
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33
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34 for.body.lr.ph: ; preds = %entry
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147
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35 ; The 'load' and the 'add' are sunken to this basic block. So let's verify that the related dbg.values are sunken as well.
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36 ; The add is later eliminated, so we verify that the dbg.value is salvaged by using DW_OP_minus.
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37 ; CHECK-LABEL: for.body.lr.ph:
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38 ; CHECK-NEXT: %0 = load
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39 ; CHECK-NEXT: call void @llvm.dbg.value(metadata i64 %0, metadata !25, metadata !DIExpression()), !dbg !
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40 ; CHECK-NEXT: call void @llvm.dbg.value(metadata i64 %0, metadata !26, metadata !DIExpression(DW_OP_constu, 4096, DW_OP_minus, DW_OP_stack_value)), !dbg !
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134
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41 br label %for.body, !dbg !32
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42
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43 for.body: ; preds = %for.body.lr.ph, %for.body
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147
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44 ; CHECK-LABEL: for.body:
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134
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45 %offset.010 = phi i64 [ %offset.08, %for.body.lr.ph ], [ %offset.0, %for.body ]
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46 %head_size.09 = phi i32 [ undef, %for.body.lr.ph ], [ %sub2, %for.body ]
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47 tail call void @llvm.dbg.value(metadata i32 %head_size.09, metadata !23, metadata !DIExpression()), !dbg !31
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48 %call = tail call i32 bitcast (i32 (...)* @use to i32 (i64, %struct.vm_object*)*)(i64 %offset.010, %struct.vm_object* %object) #3, !dbg !34
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49 %sub2 = add i32 %head_size.09, -4096, !dbg !37
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50 %offset.0 = add i64 %offset.010, -4096
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51 tail call void @llvm.dbg.value(metadata i64 %offset.0, metadata !26, metadata !DIExpression()), !dbg !30
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147
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52 ; CHECK: call void @llvm.dbg.value(metadata i64 %offset.010, metadata !26, metadata !DIExpression(DW_OP_constu, 4096, DW_OP_minus, DW_OP_stack_value)), !dbg !
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134
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53 tail call void @llvm.dbg.value(metadata i32 %sub2, metadata !23, metadata !DIExpression()), !dbg !31
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54 %tobool = icmp eq i32 %sub2, 0, !dbg !32
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55 br i1 %tobool, label %for.end, label %for.body, !dbg !32, !llvm.loop !38
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56
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57 for.end: ; preds = %for.body, %entry
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58 ret void, !dbg !40
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59 }
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60
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61 declare i32 @use(...) local_unnamed_addr
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62
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63 ; Function Attrs: nounwind readnone speculatable
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64 declare void @llvm.dbg.value(metadata, metadata, metadata) #2
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65
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66 attributes #0 = { nounwind ssp }
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67 attributes #2 = { nounwind readnone speculatable }
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68 attributes #3 = { nobuiltin }
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69
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70 !llvm.dbg.cu = !{!0}
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71 !llvm.module.flags = !{!5, !6, !7, !8, !9}
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72 !llvm.ident = !{!10}
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73
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74 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0 (trunk 317434) (llvm/trunk 317437)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3)
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75 !1 = !DIFile(filename: "test.i", directory: "/Data/radar/31209283")
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76 !2 = !{}
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77 !3 = !{!4}
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78 !4 = !DIBasicType(name: "long long unsigned int", size: 64, encoding: DW_ATE_unsigned)
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79 !5 = !{i32 2, !"Dwarf Version", i32 2}
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80 !6 = !{i32 2, !"Debug Info Version", i32 3}
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81 !7 = !{i32 1, !"wchar_size", i32 4}
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82 !8 = !{i32 1, !"min_enum_size", i32 4}
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83 !9 = !{i32 7, !"PIC Level", i32 2}
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84 !10 = !{!"clang version 6.0.0 (trunk 317434) (llvm/trunk 317437)"}
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147
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85 !11 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 6, type: !12, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !20)
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134
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86 !12 = !DISubroutineType(types: !13)
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87 !13 = !{null, !14, !19}
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88 !14 = !DIDerivedType(tag: DW_TAG_typedef, name: "v_t", file: !1, line: 1, baseType: !15)
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89 !15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 32)
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90 !16 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "v", file: !1, line: 2, size: 64, elements: !17)
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91 !17 = !{!18}
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92 !18 = !DIDerivedType(tag: DW_TAG_member, name: "p", scope: !16, file: !1, line: 3, baseType: !4, size: 64)
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93 !19 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 32)
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94 !20 = !{!21, !22, !23, !25, !26}
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95 !21 = !DILocalVariable(name: "object", arg: 1, scope: !11, file: !1, line: 6, type: !14)
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96 !22 = !DILocalVariable(name: "start", arg: 2, scope: !11, file: !1, line: 6, type: !19)
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97 !23 = !DILocalVariable(name: "head_size", scope: !11, file: !1, line: 7, type: !24)
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98 !24 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
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99 !25 = !DILocalVariable(name: "orig_start", scope: !11, file: !1, line: 8, type: !4)
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100 !26 = !DILocalVariable(name: "offset", scope: !11, file: !1, line: 9, type: !4)
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101 !27 = !DILocation(line: 6, column: 20, scope: !11)
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102 !28 = !DILocation(line: 6, column: 48, scope: !11)
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103 !29 = !DILocation(line: 8, column: 22, scope: !11)
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104 !30 = !DILocation(line: 7, column: 12, scope: !11)
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105 !31 = !DILocation(line: 10, column: 16, scope: !11)
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106 !32 = !DILocation(line: 11, column: 5, scope: !33)
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107 !33 = distinct !DILexicalBlock(scope: !11, file: !1, line: 11, column: 5)
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108 !34 = !DILocation(line: 13, column: 7, scope: !35)
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109 !35 = distinct !DILexicalBlock(scope: !36, file: !1, line: 12, column: 75)
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110 !36 = distinct !DILexicalBlock(scope: !33, file: !1, line: 11, column: 5)
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111 !37 = !DILocation(line: 12, column: 61, scope: !36)
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112 !38 = distinct !{!38, !32, !39}
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113 !39 = !DILocation(line: 14, column: 3, scope: !33)
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114 !40 = !DILocation(line: 15, column: 1, scope: !11)
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