[Bug rtl-optimization/57569] [4.8/4.9 Regression] wrong code for struct copy at -O3 on x86_64-linux

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57569 Jorn Wolfgang Rennecke changed: What|Removed |Added CC||amylaar at gcc dot gnu.org --- C

[Bug rtl-optimization/57569] [4.8/4.9 Regression] wrong code for struct copy at -O3 on x86_64-linux

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57569 --- Comment #3 from Michael Matz --- It's cse, and it's because it indeed uses the wrong dependence test. The CSE tables holds values read from memory which are supposed to be clobbered by following writes, i.e. write-after-read, which has to use

[Bug rtl-optimization/57569] [4.8/4.9 Regression] wrong code for struct copy at -O3 on x86_64-linux

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57569 --- Comment #2 from Michael Matz --- My guess is that it's again somewhere using the wrong predicate to test directed rw/wr/ww dependencies.

[Bug rtl-optimization/57569] [4.8/4.9 Regression] wrong code for struct copy at -O3 on x86_64-linux

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57569 Jakub Jelinek changed: What|Removed |Added Status|UNCONFIRMED |NEW Last reconfirmed|