[svn r154] renaming enclosingtry to enclosingtryfinally to distinguish it from enclosingtrycatch, which will probably need to be added for exception handling

enum
{
    LLVMnone,
    LLVMintrinsic,
    LLVMva_arg,
    LLVMva_start,
    LLVMva_intrinsic,
    LLVMnotypeinfo,
    LLVMalloca
};