Cleanup: Add default arguments to CodeGenFunction::StartFunction.
Thanks dblaikie for the suggestion!

llvm-svn: 206012
diff --git a/clang/lib/CodeGen/CGBlocks.cpp b/clang/lib/CodeGen/CGBlocks.cpp
index c1cbfde..18cfe49 100644
--- a/clang/lib/CodeGen/CGBlocks.cpp
+++ b/clang/lib/CodeGen/CGBlocks.cpp
@@ -1307,7 +1307,7 @@
                                           false);
   // Create a scope with an artificial location for the body of this function.
   ArtificialLocation AL(*this, Builder);
-  StartFunction(FD, C.VoidTy, Fn, FI, args, SourceLocation(), SourceLocation());
+  StartFunction(FD, C.VoidTy, Fn, FI, args);
   AL.Emit();
 
   llvm::Type *structPtrTy = blockInfo.StructureType->getPointerTo();
@@ -1477,7 +1477,7 @@
                                           false, false);
   // Create a scope with an artificial location for the body of this function.
   ArtificialLocation AL(*this, Builder);
-  StartFunction(FD, C.VoidTy, Fn, FI, args, SourceLocation(), SourceLocation());
+  StartFunction(FD, C.VoidTy, Fn, FI, args);
   AL.Emit();
 
   llvm::Type *structPtrTy = blockInfo.StructureType->getPointerTo();
@@ -1766,7 +1766,7 @@
                                           SC_Static,
                                           false, false);
 
-  CGF.StartFunction(FD, R, Fn, FI, args, SourceLocation(), SourceLocation());
+  CGF.StartFunction(FD, R, Fn, FI, args);
 
   if (byrefInfo.needsCopy()) {
     llvm::Type *byrefPtrType = byrefType.getPointerTo(0);
@@ -1835,7 +1835,7 @@
                                           SourceLocation(), II, R, 0,
                                           SC_Static,
                                           false, false);
-  CGF.StartFunction(FD, R, Fn, FI, args, SourceLocation(), SourceLocation());
+  CGF.StartFunction(FD, R, Fn, FI, args);
 
   if (byrefInfo.needsDispose()) {
     llvm::Value *V = CGF.GetAddrOfLocalVar(&src);