[Bug target/85683] [8/9 Regression] GCC 8 stopped using RMW (Read Modify Write) instructions on x86[_64]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85683 --- Comment #5 from Jakub Jelinek --- Author: jakub Date: Tue May 8 16:17:34 2018 New Revision: 260045 URL: https://gcc.gnu.org/viewcvs?rev=260045=gcc=rev Log: PR target/85683 * config/i386/i386.md: Add peepholes for mem

[Bug target/85683] [8/9 Regression] GCC 8 stopped using RMW (Read Modify Write) instructions on x86[_64]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85683 Richard Biener changed: What|Removed |Added Priority|P3 |P2

[Bug target/85683] [8/9 Regression] GCC 8 stopped using RMW (Read Modify Write) instructions on x86[_64]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85683 --- Comment #4 from Jakub Jelinek --- This seems to work. --- gcc/config/i386/i386.md.jj 2018-05-02 23:55:44.0 +0200 +++ gcc/config/i386/i386.md 2018-05-07 22:27:18.848705146 +0200 @@ -19285,6 +19285,40 @@

[Bug target/85683] [8/9 Regression] GCC 8 stopped using RMW (Read Modify Write) instructions on x86[_64]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85683 Jakub Jelinek changed: What|Removed |Added Status|NEW |ASSIGNED Assignee|unassigned

[Bug target/85683] [8/9 Regression] GCC 8 stopped using RMW (Read Modify Write) instructions on x86[_64]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85683 Jakub Jelinek changed: What|Removed |Added CC||jakub at gcc dot gnu.org Target