[Tuples]Is struct gimple_statement_lable shoud be a member of union gimple_statement_d?

[张小平]

      hello , Diego Novillo and everyone in gcc mailist.

      I am a Chinese developer and learing the project
tuples(represent gimple as tuple). When i translanting the document
《Tuples Representation for GIMPLE》 into Chinese,  i found that the
struct gimple_statement_lable is not a member of  union
gimple_statement_d. I assume it maybe a careless mistake.

     Is that truth?  Thank you very much.

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 编译器：http://hi.baidu.com/compiler/