RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-23 19:23:23 +01:00
Code Issues Projects Releases Wiki Activity

Do not unnecessarily use AT_specification DIE because it does not add any value.

Browse Source 
Few weeks ago, llvm completely inverted the debug info graph. Earlier each debug info node used to keep track of its compile unit, now compile unit keeps track of important nodes. One impact of this change is that the global variable's do not have any context, which should be checked before deciding to use AT_specification DIE.

llvm-svn: 140282
This commit is contained in:
Devang Patel 2011-09-21 23:41:11 +00:00
parent 5d64adbe43
commit 5d43ab8434
2 changed files with 21 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
View File

@ -1081,7 +1081,7 @@ void CompileUnit::createGlobalVariableDIE(const MDNode *N) {
Asm->Mang->getSymbol(GV.getGlobal()));
// Do not create specification DIE if context is either compile unit
// or a subprogram.
if (GV.isDefinition() && !GVContext.isCompileUnit() &&
if (GVContext && GV.isDefinition() && !GVContext.isCompileUnit() &&
!GVContext.isFile() && !isSubprogramContext(GVContext)) {
// Create specification DIE.
DIE *VariableSpecDIE = new DIE(dwarf::DW_TAG_variable);

20
test/CodeGen/X86/dbg-at-specficiation.ll Normal file
View File

@ -0,0 +1,20 @@
; RUN: llc < %s | FileCheck %s
; Radar 10147769
; Do not unnecessarily use AT_specification DIE.
; CHECK-NOT: AT_specification
@a = common global [10 x i32] zeroinitializer, align 16
!llvm.dbg.cu = !{!0}
!0 = metadata !{i32 720913, i32 0, i32 12, metadata !"x.c", metadata !"/private/tmp", metadata !"clang version 3.0 (trunk 140253)", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !1, metadata !3} ; [ DW_TAG_compile_unit ]
!1 = metadata !{metadata !2}
!2 = metadata !{i32 0}
!3 = metadata !{metadata !4}
!4 = metadata !{metadata !5}
!5 = metadata !{i32 720948, i32 0, null, metadata !"a", metadata !"a", metadata !"", metadata !6, i32 1, metadata !7, i32 0, i32 1, [10 x i32]* @a} ; [ DW_TAG_variable ]
!6 = metadata !{i32 720937, metadata !"x.c", metadata !"/private/tmp", null} ; [ DW_TAG_file_type ]
!7 = metadata !{i32 720897, null, metadata !"", null, i32 0, i64 320, i64 32, i32 0, i32 0, metadata !8, metadata !9, i32 0, i32 0} ; [ DW_TAG_array_type ]
!8 = metadata !{i32 720932, null, metadata !"int", null, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
!9 = metadata !{metadata !10}
!10 = metadata !{i32 720929, i64 0, i64 9} ; [ DW_TAG_subrange_type ]