The second part of support for generating dwarf for assembly source files. This

generates the dwarf Compile Unit DIE and a dwarf subprogram DIE for each
non-temporary label.

The next part will be to get the clang driver to enable this when assembling
a .s file.  rdar://9275556

llvm-svn: 146262

1 files changed, 9 insertions, 0 deletions

diff --git a/llvm/lib/MC/MCParser/AsmParser.cpp b/llvm/lib/MC/MCParser/AsmParser.cpp
index 78838937276..943f270a0a7 100644
--- a/llvm/lib/MC/MCParser/AsmParser.cpp
+++ b/llvm/lib/MC/MCParser/AsmParser.cpp
@@ -468,6 +468,9 @@ bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) {
   // section and generate a .file directive.
   if (getContext().getGenDwarfForAssembly()) {
     getContext().setGenDwarfSection(getStreamer().getCurrentSection());
+    MCSymbol *SectionStartSym = getContext().CreateTempSymbol();
+    getStreamer().EmitLabel(SectionStartSym);
+    getContext().setGenDwarfSectionStartSym(SectionStartSym);
     getStreamer().EmitDwarfFileDirective(getContext().nextGenDwarfFileNumber(),
       StringRef(), SrcMgr.getMemoryBuffer(CurBuffer)->getBufferIdentifier());
   }
@@ -1047,6 +1050,12 @@ bool AsmParser::ParseStatement() {
     // Emit the label.
     Out.EmitLabel(Sym);
 
+    // If we are generating dwarf for assembly source files then gather the
+    // info to make a dwarf subprogram entry for this label if needed.
+    if (getContext().getGenDwarfForAssembly())
+      MCGenDwarfSubprogramEntry::Make(Sym, &getStreamer(), getSourceManager(),
+                                      IDLoc);
+
     // Consume any end of statement token, if present, to avoid spurious
     // AddBlankLine calls().
     if (Lexer.is(AsmToken::EndOfStatement)) {