[CodeView] Don't emit debuginfo for imported symbols
Emitting symbol information requires us to have a definition for the
symbol. A symbol reference is insufficient.
This fixes PR28123.
llvm-svn: 272738
diff --git a/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
index a90ce05..3b7815f 100644
--- a/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
@@ -249,7 +249,8 @@
// Emit per-function debug information.
for (auto &P : FnDebugInfo)
- emitDebugInfoForFunction(P.first, P.second);
+ if (!P.first->isDeclarationForLinker())
+ emitDebugInfoForFunction(P.first, P.second);
// Emit global variable debug information.
emitDebugInfoForGlobals();
@@ -1318,7 +1319,7 @@
MCSymbol *EndLabel = nullptr;
for (const DIGlobalVariable *G : CU->getGlobalVariables()) {
if (const auto *GV = dyn_cast_or_null<GlobalVariable>(G->getVariable())) {
- if (!GV->hasComdat()) {
+ if (!GV->hasComdat() && !GV->isDeclarationForLinker()) {
if (!EndLabel) {
OS.AddComment("Symbol subsection for globals");
EndLabel = beginCVSubsection(ModuleSubstreamKind::Symbols);