Clean up constant implicit cast emission; fixes a few edge cases  invlolving implicit casts that cause both a decay to pointer type and a  type conversion.
Clean up constant implicit cast emission; fixes a few edge cases 
invlolving implicit casts that cause both a decay to pointer type and a 
type conversion.



git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@47440 91177308-0d34-0410-b5e6-96231b3b80d8

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