Don't emit a directory entry for the value in DW_AT_comp_dir, that is always
implied by directory index zero.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143570 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 1d5e05d..0f4ea05 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -442,6 +442,10 @@
if (FileName.empty())
return GetOrCreateSourceID("<stdin>", StringRef());
+ // TODO: this might not belong here. See if we can factor this better.
+ if (DirName == CompilationDir)
+ DirName = "";
+
unsigned SrcId = SourceIdMap.size()+1;
std::pair<std::string, std::string> SourceName =
std::make_pair(FileName, DirName);
@@ -466,8 +470,8 @@
CompileUnit *DwarfDebug::constructCompileUnit(const MDNode *N) {
DICompileUnit DIUnit(N);
StringRef FN = DIUnit.getFilename();
- StringRef Dir = DIUnit.getDirectory();
- unsigned ID = GetOrCreateSourceID(FN, Dir);
+ CompilationDir = DIUnit.getDirectory();
+ unsigned ID = GetOrCreateSourceID(FN, CompilationDir);
DIE *Die = new DIE(dwarf::DW_TAG_compile_unit);
CompileUnit *NewCU = new CompileUnit(ID, Die, Asm, this);
@@ -486,8 +490,8 @@
else
NewCU->addUInt(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4, 0);
- if (!Dir.empty())
- NewCU->addString(Die, dwarf::DW_AT_comp_dir, Dir);
+ if (!CompilationDir.empty())
+ NewCU->addString(Die, dwarf::DW_AT_comp_dir, CompilationDir);
if (DIUnit.isOptimized())
NewCU->addUInt(Die, dwarf::DW_AT_APPLE_optimized, dwarf::DW_FORM_flag, 1);