[Bug web/61054] Clearly note effect of memcpy optimization improvements in 4.9 changes

2014-05-04 Thread redi at gcc dot gnu.org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61054 --- Comment #3 from Jonathan Wakely --- N.B. as well as custom allocators it affects the built-in delete[], which performs an implicit null check that can be optimized away in buggy code. We documented it on that page because of case where that ha

[Bug web/61054] Clearly note effect of memcpy optimization improvements in 4.9 changes

2014-05-04 Thread harald at gigawatt dot nl
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61054 Harald van Dijk changed: What|Removed |Added Status|UNCONFIRMED |RESOLVED Resolution|---

[Bug web/61054] Clearly note effect of memcpy optimization improvements in 4.9 changes

2014-05-04 Thread redi at gcc dot gnu.org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61054 --- Comment #1 from Jonathan Wakely --- We already documented it, see "null pointer checks optimized away more aggressively" at http://gcc.gnu.org/gcc-4.9/porting_to.html