24.10.2012 14:00, Dimitry Andric wrote:
On the problematic athlons, can you please post the exact CPUIDs from
dmesg? If you have WITH_CLANG_EXTRAS enabled, please also post the
output of "opt -version".
Oct 24 01:47:20 limbo kernel: CPU: AMD Athlon(tm) XP 2500+ (1833.95-MHz
686-class CPU)
Oct 24 01:47:20 limbo kernel: Origin = "AuthenticAMD" Id = 0x6a0
Family = 0x6 Model = 0xa Stepping = 0
Ok, this CPU should be recognized by llvm as "athlon-xp". There is in
fact no need to compile all the WITH_CLANG_EXTRAS programs, I just
remembered.
If you compile a sample program with -march=native -v, it should show
you the detected CPU in the verbose command line output, e.g.:
$ clang -v -march=native -c /home/dim/src/example.c
FreeBSD clang version 3.2 (trunk 162107) 20120817
Target: i386-unknown-freebsd10.0
Thread model: posix
"/usr/bin/clang" -cc1 -triple i386-unknown-freebsd10.0 -emit-obj
-mrelax-all -disable-free -main-file-name example.c -mrelocation-model
static -mdisable-fp-elim -masm-verbose -mconstructor-aliases -target-cpu
core2 -momit-leaf-frame-pointer -v -coverage-file hw.o -resource-dir
/usr/bin/../lib/clang/3.2 -fmodule-cache-path
/home/dim/tmp/clang-module-cache -fdebug-compilation-dir /home/dim/src
-ferror-limit 19 -fmessage-length 265 -mstackrealign
-fobjc-runtime=gnustep -fdiagnostics-show-option -fcolor-diagnostics -o
hw.o -x c /home/dim/src/example.c
clang -cc1 version 3.2 based upon LLVM 3.2svn default target
i386-unknown-freebsd10.0
ignoring nonexistent directory "/usr/bin/../lib/clang/3.2/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/clang/3.2
/usr/include
End of search list.
In my case, it uses "-target-cpu core2", as you can see.
Yes, my CPU is detected as athlon-xp by clang:
# : | clang -v -E -march=native -
FreeBSD clang version 3.1 (branches/release_31 156863) 20120523
Target: i386-unknown-freebsd9.0
Thread model: posix
"/usr/bin/clang" -cc1 -triple i386-unknown-freebsd9.0 -E -disable-free
-main-file-name - -mrelocation-model static -mdisable-fp-elim
-masm-verbose -mconstructor-aliases -target-cpu athlon-xp
-momit-leaf-frame-pointer -v -resource-dir /usr/bin/../lib/clang/3.1
-fmodule-cache-path /var/tmp/clang-module-cache -fdebug-compilation-dir
/usr/src -ferror-limit 19 -fmessage-length 186 -mstackrealign
-fgnu-runtime -fobjc-runtime-has-arc -fobjc-runtime-has-weak
-fobjc-dispatch-method=non-legacy -fdiagnostics-show-option
-fcolor-diagnostics -o - -x c -
clang -cc1 version 3.1 based upon LLVM 3.1 default target
i386-unknown-freebsd9.0
ignoring nonexistent directory "/usr/bin/../lib/clang/3.1/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/clang/3.1
/usr/include
End of search list.
# 1 "<stdin>"
# 1 "<stdin>" 1
# 1 "<built-in>" 1
# 1 "<built-in>" 3
# 147 "<built-in>" 3
# 1 "<command line>" 1
# 1 "<built-in>" 2
# 1 "<stdin>" 2
And as athlon-4 by gcc:
# : | gcc -v -E -march=native -
Using built-in specs.
Target: i386-undermydesk-freebsd
Configured with: FreeBSD/i386 system compiler
Thread model: posix
gcc version 4.2.1 20070831 patched [FreeBSD]
/usr/libexec/cc1 -E -quiet -v -D_LONGLONG - -march=athlon-4
-mtune=athlon-4
#include "..." search starts here:
#include <...> search starts here:
/usr/include/gcc/4.2
/usr/include
End of search list.
# 1 "<stdin>"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "<stdin>"
# : | gcc46 -v -E -march=native -
Using built-in specs.
COLLECT_GCC=/usr/local/bin/gcc46
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc46/gcc/i386-portbld-freebsd9.1/4.6.3/lto-wrapper
Target: i386-portbld-freebsd9.1
Configured with: ./../gcc-4.6.3/configure --disable-bootstrap
--disable-nls --libdir=/usr/local/lib/gcc46
--libexecdir=/usr/local/libexec/gcc46 --program-suffix=46
--with-as=/usr/local/bin/as --with-gmp=/usr/local
--with-gxx-include-dir=/usr/local/lib/gcc46/include/c++/
--with-ld=/usr/local/bin/ld --with-libiconv-prefix=/usr/local
--with-pkgversion='FreeBSD Ports Collection' --with-system-zlib
--disable-libgcj --enable-languages=c,c++,objc,fortran
--prefix=/usr/local --mandir=/usr/local/man
--infodir=/usr/local/info/gcc46 --build=i386-portbld-freebsd9.1
Thread model: posix
gcc version 4.6.3 (FreeBSD Ports Collection)
COLLECT_GCC_OPTIONS='-v' '-E' '-march=native'
/usr/local/libexec/gcc46/gcc/i386-portbld-freebsd9.1/4.6.3/cc1 -E
-quiet -v - -march=athlon-4 -mno-cx16 -mno-sahf -mno-movbe -mno-aes
-mno-pclmul -mno-popcnt -mno-abm -mno-lwp -mno-fma -mno-fma4 -mno-xop
-mno-bmi -mno-tbm -mno-avx -mno-sse4.2 -mno-sse4.1 --param
l1-cache-size=64 --param l1-cache-line-size=64 --param l2-cache-size=512
-mtune=athlon
ignoring nonexistent directory
"/usr/local/lib/gcc46/gcc/i386-portbld-freebsd9.1/4.6.3/../../../../../i386-portbld-freebsd9.1/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/local/lib/gcc46/gcc/i386-portbld-freebsd9.1/4.6.3/include
/usr/local/include
/usr/local/lib/gcc46/gcc/i386-portbld-freebsd9.1/4.6.3/include-fixed
/usr/include
End of search list.
# 1 "<stdin>"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "<stdin>"
COMPILER_PATH=/usr/local/libexec/gcc46/gcc/i386-portbld-freebsd9.1/4.6.3/:/usr/local/libexec/gcc46/gcc/i386-portbld-freebsd9.1/4.6.3/:/usr/local/libexec/gcc46/gcc/i386-portbld-freebsd9.1/:/usr/local/lib/gcc46/gcc/i386-portbld-freebsd9.1/4.6.3/:/usr/local/lib/gcc46/gcc/i386-portbld-freebsd9.1/:/usr/local/lib/gcc46/gcc/i386-portbld-freebsd9.1/4.6.3/../../../../../i386-portbld-freebsd9.1/bin/
LIBRARY_PATH=/usr/local/lib/gcc46/gcc/i386-portbld-freebsd9.1/4.6.3/:/usr/local/lib/gcc46/gcc/i386-portbld-freebsd9.1/4.6.3/../../../../../i386-portbld-freebsd9.1/lib/:/usr/local/lib/gcc46/gcc/i386-portbld-freebsd9.1/4.6.3/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-E' '-march=native'
So I'll proceed to reproducing gcc errors.
--
Sphinx of black quartz, judge my vow.
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