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Hello, Code: https://godbolt.org/g/EG4Wi6 unsigned fff3(void) { char buf[10] = ""; return strlen(buf); } Since we are memset-ing before strlen call, we could replace strlen with just 0. Has LLVM any API to get "last instruction before strlen" which modifies strlen argument "buf"? So we can check "yes, it is memset there, replace strlen with zero"

...ies > strlen argument "buf"? So we can check "yes, it is memset there, replace > strlen with zero" ? > > > Thanks > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20180420/2c5bd66d/attachment.html>