1 ; RUN: llc -filetype=asm %s -o - | FileCheck %s 2 3 ; Test the extension of debug ranges from predecessors. 4 ; Generated from the source file LiveDebugValues.c: 5 ; #include <stdio.h> 6 ; int m; 7 ; extern int inc(int n); 8 ; extern int change(int n); 9 ; extern int modify(int n); 10 ; int main(int argc, char **argv) { 11 ; int n; 12 ; if (argc != 2) 13 ; n = 2; 14 ; else 15 ; n = atoi(argv[1]); 16 ; n = change(n); 17 ; if (n > 10) { 18 ; m = modify(n); 19 ; m = m + n; // var `m' doesn't has a dbg.value 20 ; } 21 ; else 22 ; m = inc(n); // var `m' doesn't has a dbg.value 23 ; printf("m(main): %d\n", m); 24 ; return 0; 25 ; } 26 ; with clang -g -O3 -emit-llvm -c LiveDebugValues.c -S -o live-debug-values.ll 27 ; This case will also produce multiple locations but only the debug range 28 ; extension is tested here. 29 30 ; DBG_VALUE for variable "n" is extended into %bb.5 from its predecessors %bb.3 31 ; and %bb.4. 32 ; CHECK: .LBB0_5: 33 ; CHECK-NEXT: #DEBUG_VALUE: main:n <- $ebx 34 ; Other register values have been clobbered. 35 ; CHECK-NOT: #DEBUG_VALUE: 36 ; CHECK: movl %ecx, m(%rip) 37 38 ; ModuleID = 'LiveDebugValues.c' 39 source_filename = "test/DebugInfo/X86/live-debug-values.ll" 40 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 41 target triple = "x86_64-unknown-linux-gnu" 42 43 @m = common global i32 0, align 4, !dbg !0 44 @.str = private unnamed_addr constant [13 x i8] c"m(main): %d\0A\00", align 1 45 46 ; Function Attrs: nounwind uwtable 47 define i32 @main(i32 %argc, i8** nocapture readonly %argv) #0 !dbg !10 { 48 entry: 49 tail call void @llvm.dbg.value(metadata i32 %argc, metadata !17, metadata !20), !dbg !21 50 tail call void @llvm.dbg.value(metadata i8** %argv, metadata !18, metadata !20), !dbg !22 51 %cmp = icmp eq i32 %argc, 2, !dbg !24 52 br i1 %cmp, label %if.else, label %if.end, !dbg !26 53 54 if.else: ; preds = %entry 55 %arrayidx = getelementptr inbounds i8*, i8** %argv, i64 1, !dbg !27 56 %0 = load i8*, i8** %arrayidx, align 8, !dbg !27, !tbaa !28 57 %call = tail call i32 (i8*, ...) bitcast (i32 (...)* @atoi to i32 (i8*, ...)*)(i8* %0) #1, !dbg !32 58 tail call void @llvm.dbg.value(metadata i32 %call, metadata !19, metadata !20), !dbg !33 59 br label %if.end 60 61 if.end: ; preds = %if.else, %entry 62 %n.0 = phi i32 [ %call, %if.else ], [ 2, %entry ] 63 %call1 = tail call i32 @change(i32 %n.0) #1, !dbg !34 64 tail call void @llvm.dbg.value(metadata i32 %call1, metadata !19, metadata !20), !dbg !33 65 %cmp2 = icmp sgt i32 %call1, 10, !dbg !35 66 br i1 %cmp2, label %if.then.3, label %if.else.5, !dbg !37 67 68 if.then.3: ; preds = %if.end 69 %call4 = tail call i32 @modify(i32 %call1) #1, !dbg !38 70 %add = add nsw i32 %call4, %call1, !dbg !40 71 br label %if.end.7, !dbg !41 72 73 if.else.5: ; preds = %if.end 74 %call6 = tail call i32 @inc(i32 %call1) #1, !dbg !42 75 br label %if.end.7 76 77 if.end.7: ; preds = %if.else.5, %if.then.3 78 %storemerge = phi i32 [ %call6, %if.else.5 ], [ %add, %if.then.3 ] 79 store i32 %storemerge, i32* @m, align 4, !dbg !43, !tbaa !44 80 %call8 = tail call i32 (i8*, ...) @printf(i8* nonnull getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), i32 %storemerge) #1, !dbg !46 81 ret i32 0, !dbg !47 82 } 83 84 ; Function Attrs: nounwind 85 declare i32 @atoi(...) #1 86 87 ; Function Attrs: nounwind 88 declare i32 @change(i32) #1 89 90 ; Function Attrs: nounwind 91 declare i32 @modify(i32) #1 92 93 ; Function Attrs: nounwind 94 declare i32 @inc(i32) #1 95 96 ; Function Attrs: nounwind 97 declare i32 @printf(i8* nocapture readonly, ...) #1 98 99 ; Function Attrs: nounwind readnone 100 declare void @llvm.dbg.value(metadata, metadata, metadata) #2 101 102 attributes #0 = { nounwind uwtable } 103 attributes #1 = { nounwind } 104 attributes #2 = { nounwind readnone } 105 106 !llvm.dbg.cu = !{!2} 107 !llvm.module.flags = !{!7, !8} 108 !llvm.ident = !{!9} 109 110 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) 111 !1 = !DIGlobalVariable(name: "m", scope: !2, file: !3, line: 2, type: !6, isLocal: false, isDefinition: true) 112 !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 3.8.0 (trunk 253049) ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5) 113 !3 = !DIFile(filename: "LiveDebugValues.c", directory: "/home/vt/julia/test/tvvikram") 114 !4 = !{} 115 !5 = !{!0} 116 !6 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 117 !7 = !{i32 2, !"Dwarf Version", i32 4} 118 !8 = !{i32 2, !"Debug Info Version", i32 3} 119 !9 = !{!"clang version 3.8.0 (trunk 253049) "} 120 !10 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 6, type: !11, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !16) 121 !11 = !DISubroutineType(types: !12) 122 !12 = !{!6, !6, !13} 123 !13 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !14, size: 64, align: 64) 124 !14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !15, size: 64, align: 64) 125 !15 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char) 126 !16 = !{!17, !18, !19} 127 !17 = !DILocalVariable(name: "argc", arg: 1, scope: !10, file: !3, line: 6, type: !6) 128 !18 = !DILocalVariable(name: "argv", arg: 2, scope: !10, file: !3, line: 6, type: !13) 129 !19 = !DILocalVariable(name: "n", scope: !10, file: !3, line: 7, type: !6) 130 !20 = !DIExpression() 131 !21 = !DILocation(line: 6, column: 14, scope: !10) 132 !22 = !DILocation(line: 6, column: 27, scope: !23) 133 !23 = !DILexicalBlockFile(scope: !10, file: !3, discriminator: 1) 134 !24 = !DILocation(line: 8, column: 12, scope: !25) 135 !25 = distinct !DILexicalBlock(scope: !10, file: !3, line: 8, column: 7) 136 !26 = !DILocation(line: 8, column: 7, scope: !10) 137 !27 = !DILocation(line: 11, column: 14, scope: !25) 138 !28 = !{!29, !29, i64 0} 139 !29 = !{!"any pointer", !30, i64 0} 140 !30 = !{!"omnipotent char", !31, i64 0} 141 !31 = !{!"Simple C/C++ TBAA"} 142 !32 = !DILocation(line: 11, column: 9, scope: !25) 143 !33 = !DILocation(line: 7, column: 7, scope: !23) 144 !34 = !DILocation(line: 12, column: 7, scope: !10) 145 !35 = !DILocation(line: 13, column: 9, scope: !36) 146 !36 = distinct !DILexicalBlock(scope: !10, file: !3, line: 13, column: 7) 147 !37 = !DILocation(line: 13, column: 7, scope: !10) 148 !38 = !DILocation(line: 14, column: 9, scope: !39) 149 !39 = distinct !DILexicalBlock(scope: !36, file: !3, line: 13, column: 15) 150 !40 = !DILocation(line: 15, column: 11, scope: !39) 151 !41 = !DILocation(line: 16, column: 3, scope: !39) 152 !42 = !DILocation(line: 18, column: 9, scope: !36) 153 !43 = !DILocation(line: 15, column: 7, scope: !39) 154 !44 = !{!45, !45, i64 0} 155 !45 = !{!"int", !30, i64 0} 156 !46 = !DILocation(line: 19, column: 3, scope: !10) 157 !47 = !DILocation(line: 20, column: 3, scope: !10) 158 159
