https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65837
prathamesh3492 at gcc dot gnu.org changed:
What |Removed |Added
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CC| |mkuvyrkov at gcc dot gnu.org
--- Comment #14 from prathamesh3492 at gcc dot gnu.org ---
Hi,
Following Maxim's suggestion I tried to build with x86_64-gcc passing -mtune=k8
at compile-time but not at link time and the same thing happens.
gcc -flto -mtune=k8 foo.c -v:
Without passing -mtune=k8 at link-time, -mtune=generic overrides -mtune=k8
gcc -flto foo.o -v:
COLLECT_GCC_OPTIONS='-c' '-fmath-errno' '-fsigned-zeros' '-ftrapping-math'
'-fno-trapv' '-fno-strict-overflow' '-fno-openmp' '-fno-openacc' '-mtune=k8'
'-march=x86-64' '-v' '-mtune=generic' '-march=x86-64'
'-fltrans-output-list=/tmp/cc415lAT.ltrans.out' '-fwpa'
'-fresolution=/tmp/ccuL4EuS.res'
/home/prathamesh.kulkarni/fsf-toolchain/libexec/gcc/x86_64-unknown-linux-gnu/6.0.0/lto1
-quiet -dumpbase foo.o -mtune=k8 -march=x86-64 -mtune=generic -march=x86-64
-auxbase foo -version -fmath-errno -fsigned-zeros -ftrapping-math -fno-trapv
-fno-strict-overflow -fno-openmp -fno-openacc
-fltrans-output-list=/tmp/cc415lAT.ltrans.out -fwpa
-fresolution=/tmp/ccuL4EuS.res @/tmp/ccXLZx2S
Passing -mtune=k8 at link-time, passes only -mtune=k8 to lto1
gcc -flto -mtune=k8 foo.o -v:
COLLECT_GCC_OPTIONS='-c' '-fmath-errno' '-fsigned-zeros' '-ftrapping-math'
'-fno-trapv' '-fno-strict-overflow' '-fno-openmp' '-fno-openacc' '-mtune=k8'
'-march=x86-64' '-mtune=k8' '-v' '-march=x86-64'
'-fltrans-output-list=/tmp/ccK0THy1.ltrans.out' '-fwpa'
'-fresolution=/tmp/ccqMHR7Y.res'
/home/prathamesh.kulkarni/fsf-toolchain/libexec/gcc/x86_64-unknown-linux-gnu/6.0.0/lto1
-quiet -dumpbase foo.o -mtune=k8 -march=x86-64 -mtune=k8 -march=x86-64 -auxbase
foo -version -fmath-errno -fsigned-zeros -ftrapping-math -fno-trapv
-fno-strict-overflow -fno-openmp -fno-openacc
-fltrans-output-list=/tmp/ccK0THy1.ltrans.out -fwpa
-fresolution=/tmp/ccqMHR7Y.res @/tmp/ccxcdoB1
So this looks like a target independent bug ? I am continuing to investigate
it.
Thank you,
Prathamesh
