fix PR4423.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@73938 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGCall.cpp b/lib/CodeGen/CGCall.cpp
index ec6058a..30c5d28 100644
--- a/lib/CodeGen/CGCall.cpp
+++ b/lib/CodeGen/CGCall.cpp
@@ -763,7 +763,8 @@
       
       if (CE->getOpcode() == llvm::Instruction::BitCast &&
           ActualFT->getReturnType() == CurFT->getReturnType() &&
-          ActualFT->getNumParams() == CurFT->getNumParams()) {
+          ActualFT->getNumParams() == CurFT->getNumParams() &&
+          ActualFT->getNumParams() == Args.size()) {
         bool ArgsMatch = true;
         for (unsigned i = 0, e = ActualFT->getNumParams(); i != e; ++i)
           if (ActualFT->getParamType(i) != CurFT->getParamType(i)) {