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1; RUN: llc -filetype=asm %s -o - -experimental-debug-variable-locations=false | FileCheck %s2; RUN: llc -filetype=asm %s -o - -experimental-debug-variable-locations=true | FileCheck %s --check-prefixes=CHECK,INSTRREF3 4; Test the extension of debug ranges from predecessors.5; Generated from the source file LiveDebugValues.c:6; #include <stdio.h>7; int m;8; extern int inc(int n); 9; extern int change(int n); 10; extern int modify(int n); 11; int main(int argc, char **argv) {12; int n;13; if (argc != 2)14; n = 2;15; else16; n = atoi(argv[1]);17; n = change(n);18; if (n > 10) {19; m = modify(n);20; m = m + n; // var `m' doesn't has a dbg.value21; }22; else23; m = inc(n); // var `m' doesn't has a dbg.value24; printf("m(main): %d\n", m); 25; return 0;26; }27; with clang -g -O3 -emit-llvm -c LiveDebugValues.c -S -o live-debug-values.ll28; This case will also produce multiple locations but only the debug range29; extension is tested here.30 31; XFAIL: *32; This test is failing after splitting the live range of variable "n" in %bb.3.33 34; DBG_VALUE for variable "n" is extended into %bb.5 from its predecessors %bb.335; and %bb.4.36; CHECK: .LBB0_5:37; INSTRREF-NEXT: #DEBUG_VALUE: main:argc <- [DW_OP_LLVM_entry_value 1] $edi38; INSTRREF-NEXT: #DEBUG_VALUE: main:argv <- [DW_OP_LLVM_entry_value 1] $rsi39; CHECK-NEXT: #DEBUG_VALUE: main:n <- $ebx40; Other register values have been clobbered.41; CHECK-NOT: #DEBUG_VALUE:42; CHECK: movl %e{{..}}, m(%rip)43 44; ModuleID = 'LiveDebugValues.c'45source_filename = "test/DebugInfo/X86/live-debug-values.ll"46target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"47target triple = "x86_64-unknown-linux-gnu"48 49@m = common dso_local global i32 0, align 4, !dbg !050@.str = private unnamed_addr constant [13 x i8] c"m(main): %d\0A\00", align 151 52; Function Attrs: nounwind uwtable53define dso_local i32 @main(i32 %argc, ptr nocapture readonly %argv) #0 !dbg !10 {54entry:55 tail call void @llvm.dbg.value(metadata i32 %argc, metadata !17, metadata !20), !dbg !2156 tail call void @llvm.dbg.value(metadata ptr %argv, metadata !18, metadata !20), !dbg !2257 %cmp = icmp eq i32 %argc, 2, !dbg !2458 br i1 %cmp, label %if.else, label %if.end, !dbg !2659 60if.else: ; preds = %entry61 %arrayidx = getelementptr inbounds ptr, ptr %argv, i64 1, !dbg !2762 %0 = load ptr, ptr %arrayidx, align 8, !dbg !27, !tbaa !2863 %call = tail call i32 (ptr, ...) @atoi(ptr %0) #1, !dbg !3264 tail call void @llvm.dbg.value(metadata i32 %call, metadata !19, metadata !20), !dbg !3365 br label %if.end66 67if.end: ; preds = %if.else, %entry68 %n.0 = phi i32 [ %call, %if.else ], [ 2, %entry ]69 %call1 = tail call i32 @change(i32 %n.0) #1, !dbg !3470 tail call void @llvm.dbg.value(metadata i32 %call1, metadata !19, metadata !20), !dbg !3371 %cmp2 = icmp sgt i32 %call1, 10, !dbg !3572 br i1 %cmp2, label %if.then.3, label %if.else.5, !dbg !3773 74if.then.3: ; preds = %if.end75 %call4 = tail call i32 @modify(i32 %call1) #1, !dbg !3876 %add = add nsw i32 %call4, %call1, !dbg !4077 br label %if.end.7, !dbg !4178 79if.else.5: ; preds = %if.end80 %call6 = tail call i32 @inc(i32 %call1) #1, !dbg !4281 br label %if.end.782 83if.end.7: ; preds = %if.else.5, %if.then.384 %storemerge = phi i32 [ %call6, %if.else.5 ], [ %add, %if.then.3 ]85 store i32 %storemerge, ptr @m, align 4, !dbg !43, !tbaa !4486 %call8 = tail call i32 (ptr, ...) @printf(ptr nonnull @.str, i32 %storemerge) #1, !dbg !4687 ret i32 0, !dbg !4788}89 90; Function Attrs: nounwind91declare i32 @atoi(...) #192 93; Function Attrs: nounwind94declare i32 @change(i32) #195 96; Function Attrs: nounwind97declare i32 @modify(i32) #198 99; Function Attrs: nounwind100declare i32 @inc(i32) #1101 102; Function Attrs: nounwind103declare i32 @printf(ptr nocapture readonly, ...) #1104 105; Function Attrs: nounwind readnone106declare void @llvm.dbg.value(metadata, metadata, metadata) #2107 108attributes #0 = { nounwind uwtable }109attributes #1 = { nounwind }110attributes #2 = { nounwind readnone }111 112!llvm.dbg.cu = !{!2}113!llvm.module.flags = !{!7, !8}114!llvm.ident = !{!9}115 116!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())117!1 = !DIGlobalVariable(name: "m", scope: !2, file: !3, line: 2, type: !6, isLocal: false, isDefinition: true)118!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)119!3 = !DIFile(filename: "LiveDebugValues.c", directory: "/home/vt/julia/test/tvvikram")120!4 = !{}121!5 = !{!0}122!6 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)123!7 = !{i32 2, !"Dwarf Version", i32 4}124!8 = !{i32 2, !"Debug Info Version", i32 3}125!9 = !{!"clang version 3.8.0 (trunk 253049) "}126!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)127!11 = !DISubroutineType(types: !12)128!12 = !{!6, !6, !13}129!13 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !14, size: 64, align: 64)130!14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !15, size: 64, align: 64)131!15 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)132!16 = !{!17, !18, !19}133!17 = !DILocalVariable(name: "argc", arg: 1, scope: !10, file: !3, line: 6, type: !6)134!18 = !DILocalVariable(name: "argv", arg: 2, scope: !10, file: !3, line: 6, type: !13)135!19 = !DILocalVariable(name: "n", scope: !10, file: !3, line: 7, type: !6)136!20 = !DIExpression()137!21 = !DILocation(line: 6, column: 14, scope: !10)138!22 = !DILocation(line: 6, column: 27, scope: !23)139!23 = !DILexicalBlockFile(scope: !10, file: !3, discriminator: 1)140!24 = !DILocation(line: 8, column: 12, scope: !25)141!25 = distinct !DILexicalBlock(scope: !10, file: !3, line: 8, column: 7)142!26 = !DILocation(line: 8, column: 7, scope: !10)143!27 = !DILocation(line: 11, column: 14, scope: !25)144!28 = !{!29, !29, i64 0}145!29 = !{!"any pointer", !30, i64 0}146!30 = !{!"omnipotent char", !31, i64 0}147!31 = !{!"Simple C/C++ TBAA"}148!32 = !DILocation(line: 11, column: 9, scope: !25)149!33 = !DILocation(line: 7, column: 7, scope: !23)150!34 = !DILocation(line: 12, column: 7, scope: !10)151!35 = !DILocation(line: 13, column: 9, scope: !36)152!36 = distinct !DILexicalBlock(scope: !10, file: !3, line: 13, column: 7)153!37 = !DILocation(line: 13, column: 7, scope: !10)154!38 = !DILocation(line: 14, column: 9, scope: !39)155!39 = distinct !DILexicalBlock(scope: !36, file: !3, line: 13, column: 15)156!40 = !DILocation(line: 15, column: 11, scope: !39)157!41 = !DILocation(line: 16, column: 3, scope: !39)158!42 = !DILocation(line: 18, column: 9, scope: !36)159!43 = !DILocation(line: 15, column: 7, scope: !39)160!44 = !{!45, !45, i64 0}161!45 = !{!"int", !30, i64 0}162!46 = !DILocation(line: 19, column: 3, scope: !10)163!47 = !DILocation(line: 20, column: 3, scope: !10)164 165