https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100347
Bug ID: 100347
Summary: GCC 11 does not recognize skylake; translates
"march=native" to "x86_64"
Product: gcc
Version: 11.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: driver
Assignee: unassigned at gcc dot gnu.org
Reporter: schnetter at gmail dot com
Target Milestone: ---
I just built GCC 11.1.0 (via Spack). I find that "-march=native" does not work
any more. It used to work with GCC 10.3 and earlier. The symptom is that
manually vectorized code does not compile any more.
This demonstrates the problem:
$ ./view-compilers/bin/gcc -march=native -Q --help=target | grep march
-march= x86-64
Known valid arguments for -march= option:
This outputs "x86-64" where I expect "skylake".
$ ./view-compilers/bin/gcc --version
gcc (Spack GCC) 11.1.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
It works with an older version of GCC:
$ /opt/local/bin/gcc -march=native -Q --help=target | grep march
-march= skylake
Known valid arguments for -march= option:
$ /opt/local/bin/gcc --version
gcc (MacPorts gcc10 10.3.0_0) 10.3.0
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
My system is a
$ uname -a
Darwin redshift.local 20.4.0 Darwin Kernel Version 20.4.0: Fri Mar 5 01:14:14
PST 2021; root:xnu-7195.101.1~3/RELEASE_X86_64 x86_64 i386 MacBookPro15,1
Darwin
