Only c++ class arguments with non trivial constructor or destructor needs a reference.  C struct arguments do not need this adjustment. This fixes 7 failures in callfuncs.exp from gdb testsuite.
Only c++ class arguments with non trivial constructor or destructor needs a reference. 
C struct arguments do not need this adjustment.
This fixes 7 failures in callfuncs.exp from gdb testsuite.


git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@125615 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang