llvm::Function argument count is not a good indicator of how many arugments does the function have at source level. If we need more space, just resize vector conservatively. This vector is only used once per function.

llvm-svn: 126957

1 files changed, 4 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 9aa03892dfd..2feb1256ccf 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -2330,8 +2330,11 @@ bool DwarfDebug::addCurrentFnArgument(const MachineFunction *MF,
   if (ArgNo == 0) 
     return false;
 
-  if (CurrentFnArguments.size() == 0)
+  size_t Size = CurrentFnArguments.size();
+  if (Size == 0)
     CurrentFnArguments.resize(MF->getFunction()->arg_size());
+  else if (ArgNo > Size)
+    CurrentFnArguments.resize(ArgNo * 2);
   CurrentFnArguments[ArgNo - 1] = Var;
   return true;
 }