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Debug Info: for static member variables, move AT_MIPS_linkage_name from

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TAG_member inside a class to the specification DIE.

Having AT_MIPS_linkage_name on TAG_member caused old gdb (GNU 6.3.50) to
error out. Also gcc 4.7 has AT_MIPS_linkage_name on the specification DIE.

rdar://problem/13291234


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176120 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Manman Ren 2013-02-26 20:48:29 +00:00
parent 0908bcbf44
commit 6fe26103d7
2 changed files with 7 additions and 4 deletions
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5
lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
View File

@ -1349,7 +1349,10 @@ void CompileUnit::createGlobalVariableDIE(const MDNode *N) {
// Add linkage name.
StringRef LinkageName = GV.getLinkageName();
if (!LinkageName.empty() && isGlobalVariable)
addString(VariableDIE, dwarf::DW_AT_MIPS_linkage_name,
// For static member variables, AT_MIPS_linkage_name should be on
// specification DIE to make old gdb work.
addString(IsStaticMember && VariableSpecDIE ?
VariableSpecDIE : VariableDIE, dwarf::DW_AT_MIPS_linkage_name,
getRealLinkageName(LinkageName));
} else if (const ConstantInt *CI =
dyn_cast_or_null<ConstantInt>(GV.getConstant())) {

6
test/DebugInfo/X86/debug-info-static-member.ll
View File

@ -97,7 +97,6 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
; PRESENT: DW_AT_external
; PRESENT: DW_AT_declaration
; PRESENT: DW_AT_accessibility [DW_FORM_data1] (0x03)
; PRESENT: DW_AT_MIPS_linkage_name {{.*}} "_ZN1C1aE"
; PRESENT: DW_TAG_member
; PRESENT-NEXT: DW_AT_name {{.*}} "const_a"
; PRESENT: DW_AT_external
@ -107,7 +106,6 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
; PRESENT: 0x[[DECL_B:[0-9a-f]+]]: DW_TAG_member
; PRESENT-NEXT: DW_AT_name {{.*}} "b"
; PRESENT: DW_AT_accessibility [DW_FORM_data1] (0x02)
; PRESENT: DW_AT_MIPS_linkage_name {{.*}} "_ZN1C1bE"
; PRESENT: DW_TAG_member
; PRESENT-NEXT: DW_AT_name {{.*}} "const_b"
; PRESENT: DW_AT_accessibility [DW_FORM_data1] (0x02)
@ -115,7 +113,6 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
; PRESENT: 0x[[DECL_C:[0-9a-f]+]]: DW_TAG_member
; PRESENT-NEXT: DW_AT_name {{.*}} "c"
; PRESENT: DW_AT_accessibility [DW_FORM_data1] (0x01)
; PRESENT: DW_AT_MIPS_linkage_name {{.*}} "_ZN1C1cE"
; PRESENT: DW_TAG_member
; PRESENT-NEXT: DW_AT_name {{.*}} "const_c"
; PRESENT: DW_AT_accessibility [DW_FORM_data1] (0x01)
@ -131,12 +128,15 @@ declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
; PRESENT: DW_TAG_variable
; PRESENT-NEXT: DW_AT_specification {{.*}} {0x[[DECL_A]]}
; PRESENT-NEXT: DW_AT_location
; PRESENT-NEXT: DW_AT_MIPS_linkage_name {{.*}} "_ZN1C1aE"
; PRESENT: DW_TAG_variable
; PRESENT-NEXT: DW_AT_specification {{.*}} {0x[[DECL_B]]}
; PRESENT-NEXT: DW_AT_location
; PRESENT-NEXT: DW_AT_MIPS_linkage_name {{.*}} "_ZN1C1bE"
; PRESENT: DW_TAG_variable
; PRESENT-NEXT: DW_AT_specification {{.*}} {0x[[DECL_C]]}
; PRESENT-NEXT: DW_AT_location
; PRESENT-NEXT: DW_AT_MIPS_linkage_name {{.*}} "_ZN1C1cE"
; ABSENT verifies that static member declarations do not have either
; DW_AT_location or DW_AT_data_member_location; also, variables do not