Add support for C++ default arguments, and rework Parse-Sema 
interaction for function parameters, fixing PR2046.

Patch by Doug Gregor!


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@49369 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/arg-scope-c99.c b/test/Sema/arg-scope-c99.c
new file mode 100644
index 0000000..2d386c4
--- /dev/null
+++ b/test/Sema/arg-scope-c99.c
@@ -0,0 +1,2 @@
+// RUN: clang -fsyntax-only -std=c99 -verify %s
+int bb(int sz, int ar[sz][sz]) { }