Revert "Revert "PR14606: debug info imported_module support""
This reverts commit r179840 with a fix to test/DebugInfo/two-cus-from-same-file.ll
I'm not sure why that test only failed on ARM & MIPS and not X86 Linux, even
though the debug info was clearly invalid on all of them, but this ought to fix
it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179996 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 762c475..c3f4751 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -763,6 +763,23 @@
TheCU->addGlobalName(SP.getName(), SubprogramDie);
}
+void DwarfDebug::constructImportedModuleDIE(CompileUnit *TheCU,
+ const MDNode *N) {
+ DIImportedModule Module(N);
+ if (!Module.Verify())
+ return;
+ DIE *IMDie = new DIE(dwarf::DW_TAG_imported_module);
+ TheCU->insertDIE(Module, IMDie);
+ DIE *NSDie = TheCU->getOrCreateNameSpace(Module.getNameSpace());
+ unsigned FileID = getOrCreateSourceID(Module.getContext().getFilename(),
+ Module.getContext().getDirectory(),
+ TheCU->getUniqueID());
+ TheCU->addUInt(IMDie, dwarf::DW_AT_decl_file, 0, FileID);
+ TheCU->addUInt(IMDie, dwarf::DW_AT_decl_line, 0, Module.getLineNumber());
+ TheCU->addDIEEntry(IMDie, dwarf::DW_AT_import, dwarf::DW_FORM_ref4, NSDie);
+ TheCU->addToContextOwner(IMDie, Module.getContext());
+}
+
// Emit all Dwarf sections that should come prior to the content. Create
// global DIEs and emit initial debug info sections. This is invoked by
// the target AsmPrinter.
@@ -796,6 +813,11 @@
DIArray RetainedTypes = CUNode.getRetainedTypes();
for (unsigned i = 0, e = RetainedTypes.getNumElements(); i != e; ++i)
CU->getOrCreateTypeDIE(RetainedTypes.getElement(i));
+ // Emit imported_modules last so that the relevant context is already
+ // available.
+ DIArray ImportedModules = CUNode.getImportedModules();
+ for (unsigned i = 0, e = ImportedModules.getNumElements(); i != e; ++i)
+ constructImportedModuleDIE(CU, ImportedModules.getElement(i));
// If we're splitting the dwarf out now that we've got the entire
// CU then construct a skeleton CU based upon it.
if (useSplitDwarf()) {