Keep track of inlined functions and their locations. This information is collected when nested llvm.dbg.func.start intrinsics are seen. (Right now, inliner removes nested llvm.dbg.func.start intrinisics during inlining.)
Create debug_inlined dwarf section using these information. This info is used by gdb, at least on Darwin, to enable better experience debugging inlined functions. See DwarfWriter.cpp for more information on structure of debug_inlined section.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68847 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp
index 8467330..617f6e4 100644
--- a/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/lib/CodeGen/SelectionDAG/FastISel.cpp
@@ -372,11 +372,23 @@
// Record the source line.
unsigned Line = Subprogram.getLineNumber();
- DW->RecordSourceLine(Line, 0, SrcFile);
+ unsigned LabelID = DW->RecordSourceLine(Line, 0, SrcFile);
setCurDebugLoc(DebugLoc::get(MF.getOrCreateDebugLocID(SrcFile, Line, 0)));
- // llvm.dbg.func_start also defines beginning of function scope.
- DW->RecordRegionStart(cast<GlobalVariable>(FSI->getSubprogram()));
+ std::string SPName;
+ Subprogram.getLinkageName(SPName);
+ if (!SPName.empty()
+ && strcmp(SPName.c_str(), MF.getFunction()->getNameStart())) {
+ // This is a beginning of inlined function.
+ DW->RecordRegionStart(cast<GlobalVariable>(FSI->getSubprogram()),
+ LabelID);
+ const TargetInstrDesc &II = TII.get(TargetInstrInfo::DBG_LABEL);
+ BuildMI(MBB, DL, II).addImm(LabelID);
+ DW->RecordInlineInfo(Subprogram.getGV(), LabelID);
+ } else {
+ // llvm.dbg.func_start also defines beginning of function scope.
+ DW->RecordRegionStart(cast<GlobalVariable>(FSI->getSubprogram()));
+ }
}
return true;