1 files changed, 5 insertions, 2 deletions
diff --git a/llvm/lib/MC/MCDwarf.cpp b/llvm/lib/MC/MCDwarf.cpp
index f2de2fc7255..e3e5f239ef6 100644
--- a/llvm/lib/MC/MCDwarf.cpp
+++ b/llvm/lib/MC/MCDwarf.cpp
@@ -452,7 +452,8 @@ void MCDwarfLineAddr::Encode(MCContext &Context, MCDwarfLineTableParams Params,
 
   // If the line increment is out of range of a special opcode, we must encode
   // it with DW_LNS_advance_line.
-  if (Temp >= Params.DWARF2LineRange) {
+  if (Temp >= Params.DWARF2LineRange ||
+      Temp + Params.DWARF2LineOpcodeBase > 255) {
     OS << char(dwarf::DW_LNS_advance_line);
     encodeSLEB128(LineDelta, OS);
 
@@ -494,8 +495,10 @@ void MCDwarfLineAddr::Encode(MCContext &Context, MCDwarfLineTableParams Params,
 
   if (NeedCopy)
     OS << char(dwarf::DW_LNS_copy);
-  else
+  else {
+    assert(Temp <= 255 && "Buggy special opcode encoding.");
     OS << char(Temp);
+  }
 }
 
 // Utility function to write a tuple for .debug_abbrev.