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Emit declarations before definitions if they are available. This causes DW_AT_specification to
point back in the file in the included testcase. Fixes PR11300. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143726 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
parent
931d4c2043
commit
b052728368
@ -194,11 +194,7 @@ DIE *DwarfDebug::updateSubprogramScopeDIE(CompileUnit *SPCU,
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DISubprogram SP(SPNode);
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DISubprogram SPDecl = SP.getFunctionDeclaration();
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if (SPDecl.isSubprogram())
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// Refer function declaration directly.
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SPCU->addDIEEntry(SPDie, dwarf::DW_AT_specification, dwarf::DW_FORM_ref4,
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SPCU->getOrCreateSubprogramDIE(SPDecl));
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else {
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if (!SPDecl.isSubprogram()) {
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// There is not any need to generate specification DIE for a function
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// defined at compile unit level. If a function is defined inside another
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// function then gdb prefers the definition at top level and but does not
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@ -512,14 +508,31 @@ CompileUnit *DwarfDebug::constructCompileUnit(const MDNode *N) {
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/// construct SubprogramDIE - Construct subprogram DIE.
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void DwarfDebug::constructSubprogramDIE(CompileUnit *TheCU,
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const MDNode *N) {
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CompileUnit *&CURef = SPMap[N];
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if (CURef)
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return;
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CURef = TheCU;
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DISubprogram SP(N);
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if (!SP.isDefinition())
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// This is a method declaration which will be handled while constructing
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// class type.
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return;
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DISubprogram SPDecl = SP.getFunctionDeclaration();
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DIE *DeclDie = NULL;
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if (SPDecl.isSubprogram()) {
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DeclDie = TheCU->getOrCreateSubprogramDIE(SPDecl);
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}
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DIE *SubprogramDie = TheCU->getOrCreateSubprogramDIE(SP);
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if (DeclDie) {
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// Refer function declaration directly.
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TheCU->addDIEEntry(SubprogramDie, dwarf::DW_AT_specification,
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dwarf::DW_FORM_ref4, DeclDie);
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}
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// Add to map.
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TheCU->insertDIE(N, SubprogramDie);
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@ -529,7 +542,6 @@ void DwarfDebug::constructSubprogramDIE(CompileUnit *TheCU,
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// Expose as global.
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TheCU->addGlobal(SP.getName(), SubprogramDie);
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SPMap[N] = TheCU;
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return;
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}
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65
test/DebugInfo/pr11300.ll
Normal file
65
test/DebugInfo/pr11300.ll
Normal file
@ -0,0 +1,65 @@
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; RUN: llc %s -o %t -filetype=obj
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; RUN: llvm-dwarfdump %t | FileCheck %s
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; test that the DW_AT_specification is a back edge in the file.
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; CHECK: 0x00000063: DW_TAG_subprogram [5]
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; CHECK: 0x00000089: DW_AT_specification [DW_FORM_ref4] (cu + 0x0063 => {0x00000063})
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%struct.foo = type { i8 }
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define void @_Z3zedP3foo(%struct.foo* %x) uwtable {
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entry:
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%x.addr = alloca %struct.foo*, align 8
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store %struct.foo* %x, %struct.foo** %x.addr, align 8
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call void @llvm.dbg.declare(metadata !{%struct.foo** %x.addr}, metadata !23), !dbg !24
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%0 = load %struct.foo** %x.addr, align 8, !dbg !25
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call void @_ZN3foo3barEv(%struct.foo* %0), !dbg !25
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ret void, !dbg !27
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}
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declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
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define linkonce_odr void @_ZN3foo3barEv(%struct.foo* %this) nounwind uwtable align 2 {
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entry:
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%this.addr = alloca %struct.foo*, align 8
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store %struct.foo* %this, %struct.foo** %this.addr, align 8
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call void @llvm.dbg.declare(metadata !{%struct.foo** %this.addr}, metadata !28), !dbg !29
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%this1 = load %struct.foo** %this.addr
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ret void, !dbg !30
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}
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!llvm.dbg.cu = !{!0}
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!0 = metadata !{i32 720913, i32 0, i32 4, metadata !"/home/espindola/llvm/test.cc", metadata !"/home/espindola/tmpfs/build", metadata !"clang version 3.0 ()", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !3, metadata !1} ; [ DW_TAG_compile_unit ]
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!1 = metadata !{metadata !2}
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!2 = metadata !{i32 0}
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!3 = metadata !{metadata !4}
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!4 = metadata !{metadata !5, metadata !20}
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!5 = metadata !{i32 720942, i32 0, metadata !6, metadata !"zed", metadata !"zed", metadata !"_Z3zedP3foo", metadata !6, i32 4, metadata !7, i1 false, i1 true, i32 0, i32 0, i32 0, i32 256, i1 false, void (%struct.foo*)* @_Z3zedP3foo, null, null, metadata !18} ; [ DW_TAG_subprogram ]
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!6 = metadata !{i32 720937, metadata !"/home/espindola/llvm/test.cc", metadata !"/home/espindola/tmpfs/build", null} ; [ DW_TAG_file_type ]
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!7 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, i32 0, metadata !8, i32 0, i32 0} ; [ DW_TAG_subroutine_type ]
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!8 = metadata !{null, metadata !9}
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!9 = metadata !{i32 720911, null, metadata !"", null, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !10} ; [ DW_TAG_pointer_type ]
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!10 = metadata !{i32 720898, null, metadata !"foo", metadata !6, i32 1, i64 8, i64 8, i32 0, i32 0, null, metadata !11, i32 0, null, null} ; [ DW_TAG_class_type ]
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!11 = metadata !{metadata !12}
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!12 = metadata !{i32 720942, i32 0, metadata !10, metadata !"bar", metadata !"bar", metadata !"_ZN3foo3barEv", metadata !6, i32 2, metadata !13, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, null, i32 0, metadata !16} ; [ DW_TAG_subprogram ]
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!13 = metadata !{i32 720917, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i32 0, i32 0, i32 0, metadata !14, i32 0, i32 0} ; [ DW_TAG_subroutine_type ]
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!14 = metadata !{null, metadata !15}
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!15 = metadata !{i32 720911, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !10} ; [ DW_TAG_pointer_type ]
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!16 = metadata !{metadata !17}
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!17 = metadata !{i32 720932} ; [ DW_TAG_base_type ]
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!18 = metadata !{metadata !19}
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!19 = metadata !{i32 720932} ; [ DW_TAG_base_type ]
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!20 = metadata !{i32 720942, i32 0, null, metadata !"bar", metadata !"bar", metadata !"_ZN3foo3barEv", metadata !6, i32 2, metadata !13, i1 false, i1 true, i32 0, i32 0, i32 0, i32 256, i1 false, void (%struct.foo*)* @_ZN3foo3barEv, null, metadata !12, metadata !21} ; [ DW_TAG_subprogram ]
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!21 = metadata !{metadata !22}
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!22 = metadata !{i32 720932} ; [ DW_TAG_base_type ]
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!23 = metadata !{i32 721153, metadata !5, metadata !"x", metadata !6, i32 16777220, metadata !9, i32 0, i32 0} ; [ DW_TAG_arg_variable ]
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!24 = metadata !{i32 4, i32 15, metadata !5, null}
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!25 = metadata !{i32 4, i32 20, metadata !26, null}
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!26 = metadata !{i32 720907, metadata !5, i32 4, i32 18, metadata !6, i32 0} ; [ DW_TAG_lexical_block ]
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!27 = metadata !{i32 4, i32 30, metadata !26, null}
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!28 = metadata !{i32 721153, metadata !20, metadata !"this", metadata !6, i32 16777218, metadata !15, i32 64, i32 0} ; [ DW_TAG_arg_variable ]
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!29 = metadata !{i32 2, i32 8, metadata !20, null}
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!30 = metadata !{i32 2, i32 15, metadata !31, null}
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!31 = metadata !{i32 720907, metadata !20, i32 2, i32 14, metadata !6, i32 1} ; [ DW_TAG_lexical_block ]
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