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1 2; Check that when variables are allocated on the stack we generate debug locations3; for the stack location directly instead of generating a register+offset indirection.4 5; RUN: llc -O2 -filetype=obj -disable-post-ra -mtriple=x86_64-unknown-linux-gnu < %s \6; RUN: | llvm-dwarfdump - | FileCheck %s7;8; int data = 17;9; int sum = 0;10; int zero = 0;11; int *ptr;12;13; extern void foo(int i, int *p);14;15; int main()16; {17; int val;18; val = data;19; foo(1, &val);20; foo(2, &data);21; return zero;22; }23;24; CHECK: .debug_info contents25; CHECK: DW_TAG_subprogram26; CHECK-NOT: NULL27; CHECK: DW_TAG_variable28; CHECK: DW_AT_location ({{.*}}29; CHECK-NEXT: [{{0x.*}}, {{0x.*}}): DW_OP_reg0 RAX30;31; Note: This is a location, so we don't want an extra DW_OP_deref at the end.32; LLDB gets the location right without it:33; Variable: ... name = "val", type = "int", location = [rsp+4], decl = frame.c:1034; Adding the deref actually creates an invalid location:35; ... [rsp+4] DW_OP_deref36;37; CHECK-NEXT: [{{0x.*}}, {{0x.*}}): DW_OP_breg7 RSP+4)38; CHECK-NEXT: DW_AT_name ("val")39 40; ModuleID = 'frame.c'41source_filename = "frame.c"42 43@data = dso_local global i32 17, align 4, !dbg !044@sum = dso_local local_unnamed_addr global i32 0, align 4, !dbg !645@zero = dso_local local_unnamed_addr global i32 0, align 4, !dbg !946@ptr = common dso_local local_unnamed_addr global ptr null, align 8, !dbg !1147 48define dso_local i32 @main() local_unnamed_addr !dbg !17 {49entry:50 %val = alloca i32, align 451 %0 = bitcast ptr %val to ptr, !dbg !2252 call void @llvm.lifetime.start(i64 4, ptr %0), !dbg !2253 %1 = load i32, ptr @data, align 4, !dbg !23, !tbaa !2454 tail call void @llvm.dbg.value(metadata i32 %1, metadata !21, metadata !28), !dbg !2955 store i32 %1, ptr %val, align 4, !dbg !30, !tbaa !2456 tail call void @llvm.dbg.value(metadata ptr %val, metadata !21, metadata !31), !dbg !2957 call void @foo(i32 1, ptr nonnull %val), !dbg !3258 call void @foo(i32 2, ptr nonnull @data), !dbg !3359 %2 = load i32, ptr @zero, align 4, !dbg !34, !tbaa !2460 call void @llvm.lifetime.end(i64 4, ptr %0), !dbg !3561 ret i32 %2, !dbg !3662}63 64; Function Attrs: argmemonly nounwind65declare void @llvm.lifetime.start(i64, ptr nocapture) #066 67declare void @foo(i32, ptr) local_unnamed_addr68 69; Function Attrs: argmemonly nounwind70declare void @llvm.lifetime.end(i64, ptr nocapture) #071 72; Function Attrs: nounwind readnone73declare void @llvm.dbg.value(metadata, metadata, metadata) #174 75attributes #0 = { argmemonly nounwind }76attributes #1 = { nounwind readnone }77 78!llvm.dbg.cu = !{!2}79!llvm.module.flags = !{!14, !15}80!llvm.ident = !{!16}81 82!0 = distinct !DIGlobalVariableExpression(var: !1, expr: !DIExpression())83!1 = !DIGlobalVariable(name: "data", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)84!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 3.9.0 (trunk 273961)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)85!3 = !DIFile(filename: "frame.c", directory: "/home/user/test")86!4 = !{}87!5 = !{!0, !6, !9, !11}88!6 = distinct !DIGlobalVariableExpression(var: !7, expr: !DIExpression())89!7 = !DIGlobalVariable(name: "sum", scope: !2, file: !3, line: 2, type: !8, isLocal: false, isDefinition: true)90!8 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)91!9 = distinct !DIGlobalVariableExpression(var: !10, expr: !DIExpression())92!10 = !DIGlobalVariable(name: "zero", scope: !2, file: !3, line: 3, type: !8, isLocal: false, isDefinition: true)93!11 = distinct !DIGlobalVariableExpression(var: !12, expr: !DIExpression())94!12 = !DIGlobalVariable(name: "ptr", scope: !2, file: !3, line: 4, type: !13, isLocal: false, isDefinition: true)95!13 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64, align: 64)96!14 = !{i32 2, !"Dwarf Version", i32 4}97!15 = !{i32 2, !"Debug Info Version", i32 3}98!16 = !{!"clang version 3.9.0 (trunk 273961)"}99!17 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 8, type: !18, isLocal: false, isDefinition: true, scopeLine: 9, isOptimized: true, unit: !2, retainedNodes: !20)100!18 = !DISubroutineType(types: !19)101!19 = !{!8}102!20 = !{!21}103!21 = !DILocalVariable(name: "val", scope: !17, file: !3, line: 10, type: !8)104!22 = !DILocation(line: 10, column: 3, scope: !17)105!23 = !DILocation(line: 11, column: 9, scope: !17)106!24 = !{!25, !25, i64 0}107!25 = !{!"int", !26, i64 0}108!26 = !{!"omnipotent char", !27, i64 0}109!27 = !{!"Simple C/C++ TBAA"}110!28 = !DIExpression()111!29 = !DILocation(line: 10, column: 7, scope: !17)112!30 = !DILocation(line: 11, column: 7, scope: !17)113!31 = !DIExpression(DW_OP_deref)114!32 = !DILocation(line: 12, column: 3, scope: !17)115!33 = !DILocation(line: 13, column: 3, scope: !17)116!34 = !DILocation(line: 14, column: 10, scope: !17)117!35 = !DILocation(line: 15, column: 1, scope: !17)118!36 = !DILocation(line: 14, column: 3, scope: !17)119 120