[PATCH] D64678: [Sema] Fix -Wuninitialized for struct assignment from GNU C statement expression
Richard Smith - zygoloid via Phabricator via cfe-commits
cfe-commits at lists.llvm.org
Wed Jul 17 19:44:43 PDT 2019
rsmith added a comment.
I don't think this problem really has anything to do with statement expressions; consider:
struct Widget a = (init2(&a), a);
... which has the same behaviour and presumably produces the same warning.
It's just a C / C++ difference. In C++, these examples are undefined because the lifetime of the object hasn't started yet, but I think in C they're valid. We should just disable the whole warning in C mode and leave it to the CFG analysis.
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