[Bug middle-end/82885] memcpy does not propagate aliasing knowledge

2019-05-07 Thread rguenth at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82885 Richard Biener changed: What|Removed |Added CC||david.bolvansky at gmail dot com --- C

[Bug middle-end/82885] memcpy does not propagate aliasing knowledge

2017-11-08 Thread rguenth at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82885 Richard Biener changed: What|Removed |Added Keywords||alias, missed-optimization

[Bug middle-end/82885] memcpy does not propagate aliasing knowledge

2017-11-07 Thread glisse at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82885 --- Comment #1 from Marc Glisse --- gcc (illegally) generates some calls to memcpy(p,q,n) where p and q may be the same pointer, although they mustn't overlap in any more complicated way. That makes such an optimization problematic (although this