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 ; CHECK-NEXT: #DEBUG_VALUE: main:argv <- %RSI 35 36 ; ModuleID = 'LiveDebugValues.c' 37 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 38 target triple = "x86_64-unknown-linux-gnu" 39 40 @m = common global i32 0, align 4 41 @.str = private unnamed_addr constant [13 x i8] c"m(main): %d\0A\00", align 1 42 43 ; Function Attrs: nounwind uwtable 44 define i32 @main(i32 %argc, i8** nocapture readonly %argv) #0 !dbg !4 { 45 entry: 46 tail call void @llvm.dbg.value(metadata i32 %argc, i64 0, metadata !12, metadata !20), !dbg !21 47 tail call void @llvm.dbg.value(metadata i8** %argv, i64 0, metadata !13, metadata !20), !dbg !22 48 %cmp = icmp eq i32 %argc, 2, !dbg !24 49 br i1 %cmp, label %if.else, label %if.end, !dbg !26 50 51 if.else: ; preds = %entry 52 %arrayidx = getelementptr inbounds i8*, i8** %argv, i64 1, !dbg !27 53 %0 = load i8*, i8** %arrayidx, align 8, !dbg !27, !tbaa !28 54 %call = tail call i32 (i8*, ...) bitcast (i32 (...)* @atoi to i32 (i8*, ...)*)(i8* %0) #4, !dbg !32 55 tail call void @llvm.dbg.value(metadata i32 %call, i64 0, metadata !14, metadata !20), !dbg !33 56 br label %if.end 57 58 if.end: ; preds = %entry, %if.else 59 %n.0 = phi i32 [ %call, %if.else ], [ 2, %entry ] 60 %call1 = tail call i32 @change(i32 %n.0) #4, !dbg !34 61 tail call void @llvm.dbg.value(metadata i32 %call1, i64 0, metadata !14, metadata !20), !dbg !33 62 %cmp2 = icmp sgt i32 %call1, 10, !dbg !35 63 br i1 %cmp2, label %if.then.3, label %if.else.5, !dbg !37 64 65 if.then.3: ; preds = %if.end 66 %call4 = tail call i32 @modify(i32 %call1) #4, !dbg !38 67 %add = add nsw i32 %call4, %call1, !dbg !40 68 br label %if.end.7, !dbg !41 69 70 if.else.5: ; preds = %if.end 71 %call6 = tail call i32 @inc(i32 %call1) #4, !dbg !42 72 br label %if.end.7 73 74 if.end.7: ; preds = %if.else.5, %if.then.3 75 %storemerge = phi i32 [ %call6, %if.else.5 ], [ %add, %if.then.3 ] 76 store i32 %storemerge, i32* @m, align 4, !dbg !43, !tbaa !44 77 %call8 = tail call i32 (i8*, ...) @printf(i8* nonnull getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), i32 %storemerge) #4, !dbg !46 78 ret i32 0, !dbg !47 79 } 80 81 declare i32 @atoi(...) #1 82 83 declare i32 @change(i32) #1 84 85 declare i32 @modify(i32) #1 86 87 declare i32 @inc(i32) #1 88 89 ; Function Attrs: nounwind 90 declare i32 @printf(i8* nocapture readonly, ...) #2 91 92 ; Function Attrs: nounwind readnone 93 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #3 94 95 attributes #0 = { nounwind uwtable } 96 attributes #1 = { nounwind } 97 attributes #2 = { nounwind } 98 attributes #3 = { nounwind readnone } 99 attributes #4 = { nounwind } 100 101 !llvm.dbg.cu = !{!0} 102 !llvm.module.flags = !{!17, !18} 103 !llvm.ident = !{!19} 104 105 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.8.0 (trunk 253049) ", isOptimized: true, runtimeVersion: 0, emissionKind: 1, enums: !2, subprograms: !3, globals: !15) 106 !1 = !DIFile(filename: "LiveDebugValues.c", directory: "/home/vt/julia/test/tvvikram") 107 !2 = !{} 108 !3 = !{!4} 109 !4 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 6, type: !5, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true, variables: !11) 110 !5 = !DISubroutineType(types: !6) 111 !6 = !{!7, !7, !8} 112 !7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 113 !8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 64, align: 64) 114 !9 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64, align: 64) 115 !10 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char) 116 !11 = !{!12, !13, !14} 117 !12 = !DILocalVariable(name: "argc", arg: 1, scope: !4, file: !1, line: 6, type: !7) 118 !13 = !DILocalVariable(name: "argv", arg: 2, scope: !4, file: !1, line: 6, type: !8) 119 !14 = !DILocalVariable(name: "n", scope: !4, file: !1, line: 7, type: !7) 120 !15 = !{!16} 121 !16 = !DIGlobalVariable(name: "m", scope: !0, file: !1, line: 2, type: !7, isLocal: false, isDefinition: true, variable: i32* @m) 122 !17 = !{i32 2, !"Dwarf Version", i32 4} 123 !18 = !{i32 2, !"Debug Info Version", i32 3} 124 !19 = !{!"clang version 3.8.0 (trunk 253049) "} 125 !20 = !DIExpression() 126 !21 = !DILocation(line: 6, column: 14, scope: !4) 127 !22 = !DILocation(line: 6, column: 27, scope: !23) 128 !23 = !DILexicalBlockFile(scope: !4, file: !1, discriminator: 1) 129 !24 = !DILocation(line: 8, column: 12, scope: !25) 130 !25 = distinct !DILexicalBlock(scope: !4, file: !1, line: 8, column: 7) 131 !26 = !DILocation(line: 8, column: 7, scope: !4) 132 !27 = !DILocation(line: 11, column: 14, scope: !25) 133 !28 = !{!29, !29, i64 0} 134 !29 = !{!"any pointer", !30, i64 0} 135 !30 = !{!"omnipotent char", !31, i64 0} 136 !31 = !{!"Simple C/C++ TBAA"} 137 !32 = !DILocation(line: 11, column: 9, scope: !25) 138 !33 = !DILocation(line: 7, column: 7, scope: !23) 139 !34 = !DILocation(line: 12, column: 7, scope: !4) 140 !35 = !DILocation(line: 13, column: 9, scope: !36) 141 !36 = distinct !DILexicalBlock(scope: !4, file: !1, line: 13, column: 7) 142 !37 = !DILocation(line: 13, column: 7, scope: !4) 143 !38 = !DILocation(line: 14, column: 9, scope: !39) 144 !39 = distinct !DILexicalBlock(scope: !36, file: !1, line: 13, column: 15) 145 !40 = !DILocation(line: 15, column: 11, scope: !39) 146 !41 = !DILocation(line: 16, column: 3, scope: !39) 147 !42 = !DILocation(line: 18, column: 9, scope: !36) 148 !43 = !DILocation(line: 15, column: 7, scope: !39) 149 !44 = !{!45, !45, i64 0} 150 !45 = !{!"int", !30, i64 0} 151 !46 = !DILocation(line: 19, column: 3, scope: !4) 152 !47 = !DILocation(line: 20, column: 3, scope: !4) 153
