[Bug ipa/81128] Function multi-versioning does not work with -O
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81128 --- Comment #12 from Billy O'Mahony --- Thanks, Martin. That's great. Can you update the ticket with the fixed versions when you get a chance? (In reply to Martin Liška from comment #11) > (In reply to Billy O'Mahony from comment #10) > > Hi All, > > > > thanks to Martin, Nathan and Richard for working on and fixing this issue. > > > > Can anyone say if the fix will be back ported to future point releases of > > the 5.x, 6.x, 7.x versions? > > > > Regards, > > Billy > > Well, in general I don't tend to backport multiversioning patches as many > dependent patches were applied in GCC 8 cycle. But this one is quite > independent. I'm planning to do backports next week.
[Bug ipa/81128] Function multi-versioning does not work with -O
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81128 --- Comment #10 from Billy O'Mahony --- Hi All, thanks to Martin, Nathan and Richard for working on and fixing this issue. Can anyone say if the fix will be back ported to future point releases of the 5.x, 6.x, 7.x versions? Regards, Billy
[Bug c/81128] Function multi-versioning does not work with -Ofast
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81128 --- Comment #3 from Billy O'Mahony --- Created attachment 41585 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41585=edit Preprocessed main file
[Bug c/81128] Function multi-versioning does not work with -Ofast
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81128 --- Comment #2 from Billy O'Mahony --- COLLECT_GCC=gcc-6 COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/6/lto-wrapper Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Ubuntu 6.2.0-3ubuntu11~16.04' --with-bugurl=file:///usr/share/doc/gcc-6/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-6 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-6-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-6-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-6-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 6.2.0 20160901 (Ubuntu 6.2.0-3ubuntu11~16.04)
[Bug c/81128] Function multi-versioning does not work with -Ofast
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81128 Billy O'Mahony changed: What|Removed |Added CC||billy.o.mahony at intel dot com --- Comment #1 from Billy O'Mahony --- I see the same behaviour with 5.4.0.
[Bug c/81128] New: Function multi-versioning does not work with -Ofast
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81128 Bug ID: 81128 Summary: Function multi-versioning does not work with -Ofast Product: gcc Version: 6.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: billy.o.mahony at intel dot com Target Milestone: --- Created attachment 41584 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41584=edit c code Hi All, I've been investigating function multi-versioning feature and it works as expected except when I compile with -Ofast. When adding -Ofast to the compile what I see is that each time the multi-versioned function is called is that the *resolver* is called but that neither of the implementations are called. Code, build commands and example outputs & .asm attached. Regards, Billy
