https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120559
--- Comment #6 from Lucian Raul Silistru <lucian.silistru at gmail dot com> --- (In reply to Andrew Pinski from comment #5) > struct tx_buffer_entry *entry; > > uint32_t * ptr = (void *)(&entry); > > uint32_t value = (*ptr | (channel & 3)); > // alias violation here, reading a `struct tx_buffer_entry *` value via > uint32_t. > > Use -fno-strict-aliasing or fix your code differently. > > https://gist.github.com/shafik/848ae25ee209f698763cffee272a58f8 is a good > place to start reading up about strict aliasing. But there are many more > pages about it. Thanks for confirming. Barely looked at that function with the symptom in the caller. 2 final questions: 1. Does it affect the caller due to LTO being used? 2. So it is tx_buffer_entry ** -> uint32_t * + deref that just adds an aliasing violation to just do the same as tx_buffer_entry * -> uint32_t, correct?
