[Bug tree-optimization/99954] [8/9/10/11 Regression] Copy loop over array of unions at -O3 generates memcpy instead of memmove, resulting in incorrect code

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99954 --- Comment #5 from CVS Commits --- The master branch has been updated by Richard Biener : https://gcc.gnu.org/g:c01ae2ab6b227e21835d128c90e974dce4604be9 commit r11-8027-gc01ae2ab6b227e21835d128c90e974dce4604be9 Author: Richard Biener Date:

[Bug tree-optimization/99954] [8/9/10/11 Regression] Copy loop over array of unions at -O3 generates memcpy instead of memmove, resulting in incorrect code

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99954 --- Comment #4 from Richard Biener --- OK, so (compute_affine_dependence stmt_a: _1 = MEM[(union container *)p_11 + -4B].value; stmt_b: p_11->value = _1; ) -> no dependence where there is indeed no depedence but it looks like this is the

[Bug tree-optimization/99954] [8/9/10/11 Regression] Copy loop over array of unions at -O3 generates memcpy instead of memmove, resulting in incorrect code

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99954 Richard Biener changed: What|Removed |Added Priority|P3 |P2 Assignee|unassigned at

[Bug tree-optimization/99954] [8/9/10/11 Regression] Copy loop over array of unions at -O3 generates memcpy instead of memmove, resulting in incorrect code

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99954 --- Comment #2 from Jonathan Wakely --- > using -O2 "fixes" the issue on GCC 9 and below but not on 10. And that changed with r271553 PR tree-optimization/88440 * opts.c (default_options_table): Enable

[Bug tree-optimization/99954] [8/9/10/11 Regression] Copy loop over array of unions at -O3 generates memcpy instead of memmove, resulting in incorrect code

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99954 Jonathan Wakely changed: What|Removed |Added Status|UNCONFIRMED |NEW Last reconfirmed|