Gracefully handle imbalanced inline function begin and end markers.

llvm-svn: 73426

2 files changed, 9 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index c773378bb01..1e04e2a67d6 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -1850,7 +1850,14 @@ unsigned DwarfDebug::RecordInlinedFnEnd(DISubprogram &SP) {
   }
 
   SmallVector<DbgScope *, 8> &Scopes = I->second;
-  assert(!Scopes.empty() && "We should have at least one debug scope!");
+  if (Scopes.empty()) {
+    // Returned ID is 0 if this is unbalanced "end of inlined
+    // scope". This could happen if optimizer eats dbg intrinsics
+    // or "beginning of inlined scope" is not recoginized due to
+    // missing location info. In such cases, ignore this region.end.
+    return 0;
+  }
+
   DbgScope *Scope = Scopes.back(); Scopes.pop_back();
   unsigned ID = MMI->NextLabelID();
   MMI->RecordUsedDbgLabel(ID);
diff --git a/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp b/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
index 4a7dbebe2de..26e33b80087 100644
--- a/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
@@ -361,7 +361,7 @@ bool FastISel::SelectCall(User *I) {
           // Returned ID is 0 if this is unbalanced "end of inlined
           // scope". This could happen if optimizer eats dbg intrinsics
           // or "beginning of inlined scope" is not recoginized due to
-          // missing location info. In such cases, do ignore this region.end.
+          // missing location info. In such cases, ignore this region.end.
           BuildMI(MBB, DL, II).addImm(ID);
       } else {
         const TargetInstrDesc &II = TII.get(TargetInstrInfo::DBG_LABEL);