search for: mprefer

On Fri, Nov 3, 2017, at 05:47, Craig Topper via llvm-dev wrote: > That's a very good point about the ordering of the command line options. > gcc's current implementation treats -mprefer-avx256 has "prefer 256 over > 512" and -mprefer-avx128 as "prefer 128 over 256". Which feels weird for > other reasons, but has less of an ordering ambiguity. > > -mprefer-avx128 has been in gcc for many years and predates the creation > of > avx512. -mprefer-...

...2, 2017 at 7:05 PM James Y Knight via llvm-dev < llvm-dev at lists.llvm.org> wrote: > On Wed, Nov 1, 2017 at 7:35 PM, Craig Topper via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > >> Hello all, >> >> >> >> I would like to propose adding the -mprefer-avx256 and -mprefer-avx128 >> command line flags supported by latest GCC to clang. These flags will be >> used to limit the vector register size presented by TTI to the vectorizers. >> The backend will still be able to use wider registers for code written >> using the instri...

I agree that a less x86 specific command line makes sense. I've been having an internal discussions with gcc folks and their evaluating switching to something like -mprefer-vector-width=128/256/512/none Based on the current performance data we're seeing, we think we need to ultimately default skylake-avx512 to -mprefer-vector-width=256. If we go with a target independent option/implementation is there someway we could still affect the default behavior in a target...

...t; > On Thu, Nov 9, 2017 at 4:21 PM, Craig Topper <craig.topper at gmail.com> > wrote: > >> I agree that a less x86 specific command line makes sense. I've been >> having an internal discussions with gcc folks and their evaluating >> switching to something like -mprefer-vector-width=128/256/512/none >> >> Based on the current performance data we're seeing, we think we need to >> ultimately default skylake-avx512 to -mprefer-vector-width=256. If we go >> with a target independent option/implementation is there someway we could >> s...

Hello all, I would like to propose adding the -mprefer-avx256 and -mprefer-avx128 command line flags supported by latest GCC to clang. These flags will be used to limit the vector register size presented by TTI to the vectorizers. The backend will still be able to use wider registers for code written using the instrinsics in x86intrin.h. And the backen...

...iews.llvm.org/D21379 > > But I'm not sure we really need that kind of hack. Can we adjust the > attribute in clang based on the target cpu? Ie, if you have something like: > $ clang -O2 -march=skylake-avx512 foo.c > > Then you can detect that in the clang driver and pass > -mprefer-vector-width=256 to clang codegen as an option? Clang codegen then > adds that function attribute to everything it outputs. Then, the > vectorizers and/or backend detect that attribute and adjust their behavior > based on it. > > So I don't think we should be messing with any kin...

...home/wayne/wine2/wine/dlls' make[2]: Entering directory `/home/wayne/wine2/wine/dlls/ntdll' make[2]: *** Warning: File `../../memory/atom.c' has modification time in the future (2002-10-04 19:45:00 > 2002-10-04 17:55:05) gcc -c -I. -I. -I../../include -I../../include -g -O2 -Wall -mpreferred-stack-boundary=2 -fPIC -D__WINE__ -D_NTSYSTEM_ -DBINDIR="\"/usr/local/bin\"" -DETCDIR="\"/usr/local/etc\"" -D_REENTRANT -o ../../memory/atom.o ../../memory/atom.c gcc -c -I. -I. -I../../include -I../../include -g -O2 -Wall -mpreferred-stack-boundary...

...architectural features for vector > intrinsics and the like. > I took this to mean that the feature should be enabled by default for -march=skylake-avx512. > > > Based on the current performance data we're seeing, we think we need to > ultimately default skylake-avx512 to -mprefer-vector-width=256. > > > Craig, is this for both integer and floating-point code? > I believe so, but I'll try to get confirmation from the people with more data. > > > -Hal > > Most people will build for the standard x86_64-pc-linux or whatever > anyway, an...

...> > Agreed. Yes. Also, GNOMETOYS clarified to me (off list) that is what he meant. -Hal > > -eric > > > > >> Based on the current performance data we're seeing, we think >> we need to ultimately default skylake-avx512 to >> -mprefer-vector-width=256. > > Craig, is this for both integer and floating-point code? > > > I believe so, but I'll try to get confirmation from the people > with more data. > > > > -Hal > >> Most people will build for the stand...

...m.org> wrote: > For the re-vectorization case mentioned by Sanjay. That seems like a > different type of limit than what's being proposed here. For > revectorization you want to remove smaller vector widths. This is removing > larger vector widths. I don't think we want the -mprefer-vector-width=256 > being proposed here to say we can't do 128-bit vectors with the 256-bit. > Maybe this should be called -mlimit-vector-width? > > Its not clear to be why revectorization would need a preference at all? > Shouldn't we be able to decide from the cost models? W...

...This got me future then running as a user ,"which would not run at all", but stills has problems. When i run wineinstall now it starts doing its magic but stops with this error. Compiling regedit... gcc -c -I. -I. -I../../include -I../../include -I../../include/msvcrt -g -O2 -Wall -mpreferred-stack-boundary=2 -fPIC -DSTRICT -DNONAMELESSUNION -DNONAMELESSSTRUCT -D_REENTRANT -o regedit.o regedit.c gcc -c -I. -I. -I../../include -I../../include -I../../include/msvcrt -g -O2 -Wall -mpreferred-stack-boundary=2 -fPIC -DSTRICT -DNONAMELESSUNION -DNONAMELESSSTRUCT -D_REENTRANT -o regp...

When i run make, in the wine directory, i have the followin errors: gcc -c -I. -I. -I../../include -I../../include -g -O2 -Wall -mpreferred-stack-boundary=2 -fPIC -D__WINE__ -D_REENTRANT -o riched32.dll.dbg.o riched32.dll.dbg.c ld -r charlist.o reader.o text-writer.o richedit.o riched32.dll.dbg.o -o riched32.dll.tmp.o strip --strip-unneeded riched32.dll.tmp.o LD_LIBRARY_PATH="../../library:../../unicode:$LD_LIBRARY_PATH&q...

Why can't I build wine? And why didn't ./configure catch it? ....... ....... ....... gcc -c -I. -I. -I../include -I../include -g -O2 -Wall -mpreferred-stack-boundary=2 -fPIC -D__WINE__ -D_REENTRANT -I/usr/X11R6/include -o ts_xresource.o ts_xresource.c gcc -c -I. -I. -I../include -I../include -g -O2 -Wall -mpreferred-stack-boundary=2 -fPIC -D__WINE__ -D_REENTRANT -I/usr/X11R6/include -o ts_xvideo.o ts_xvideo.c gcc -c -I. -I. -I../include -I../...

...nfigured for i686-pc-linux-gnu Source directory: . Installation directory: /usr/local C compiler: gcc -D__NO_MATH_INLINES -mieee-fp -O2 \ -pipe -s -mpentiumpro -mcpu=pentiumpro -march=pentiumpro -mieee-fp \ -malign-loops=2 -malign-jumps=2 -malign-functions=2 \ -mpreferred-stack-boundary=2 C++ compiler: g++ -mieee-fp -O2 -pipe -s -mpentiumpro \ -mcpu=pentiumpro -march=pentiumpro -mieee-fp -malign-loops=2 \ -malign-jumps=2 -malign-functions=2 -mpreferred-stack-boundary=2 FORTRAN compiler: g77 -O2 -pipe -s -mpentiumpro \ -mcpu=pentiump...

Hi ! After download latest version from cvs compile fails: make[2]: Entering directory `/backup/privat/emulator/wine/dlls/activeds' gcc -c -I. -I. -I../../include -I../../include -D__WINESRC__ -D_REENTRANT -fPIC -Wall -pipe -mpreferred-stack-boundary=2 -fno-strict-aliasing -gstabs+ -Wpointer-arith -g -O2 -o activeds_main.o activeds_main.c ../../tools/winebuild/winebuild -D__WINESRC__ -o activeds.dll.dbg.c --debug -C. activeds_main.c gcc -c -I. -I. -I../../include -I../../include -D__WINESRC__ -D_REENTRANT -fPIC -Wall...

wxRuby 0.6.0 has been released and is now available for download from RubyForge at http://wxruby.rubyforge.org/ This release includes binary builds for Max OS X and MS Windows. Changes in this release include: * Additional widget support in XRC (thanks to Marshall Elfstrand) * Addition of wxScrollbar (thanks to Hans Harmon of Pinnacle Technologies Inc) * Addition of wxGrid event handlers (thanks

...e -Wcast-qual -fformat-extensions -ansi -nostdinc -I- -I. -I/vol/vol0/users/des/tinderbox/RELENG_4/i386/pc98/src/sys -I/vol/vol0/users/des/tinderbox/RELENG_4/i386/pc98/src/sys/../include -I/vol/vol0/users/des/tinderbox/RELENG_4/i386/pc98/src/sys/contrib/ipfilter -D_KERNEL -include opt_global.h -mpreferred-stack-boundary=2 /vol/vol0/users/des/tinderbox/RELENG_4/i386/pc98/src/sys/kern/tty_tty.c cc -c -O -pipe -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual -fformat-extensions -ansi -nostdinc -I- -I. -I/vol/vol0/users/des/ti...

...des/tinderbox/RELENG_4/i386/i386/src/sys -I/vol/vol0/users/des/tinderbox/RELENG_4/i386/i386/src/sys/../include -I/vol/vol0/users/des/tinderbox/RELENG_4/i386/i386/src/sys/contrib/dev/acpica -I/vol/vol0/users/des/tinderbox/RELENG_4/i386/i386/src/sys/contrib/ipfilter -D_KERNEL -include opt_global.h -mpreferred-stack-boundary=2 /vol/vol0/users/des/tinderbox/RELENG_4/i386/i386/src/sys/vm/vm_glue.c cc -c -O -pipe -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual -fformat-extensions -ansi -nostdinc -I- -I. -I/vol/vol0/users/des/tind...

Hello all. The latest version of wine (both CVS and tarball) doesn't compile on my machine (2.6.13 kernel, gcc 3.3.4). I get an error in dlls/wldap32: gcc -c -I. -I. -I../../include -I../../include -D__WINESRC__ -D_REENTRANT -fPIC -Wall -pipe -mpreferred-stack-boundary=2 -fno-strict-aliasing -gstabs+ -Wpointer-arith -g -O2 -o add.o add.c In file included from add.c:39: winldap_private.h:289: error: parse error before "BerElement" winldap_private.h:290: error: parse error before "BerElement" winldap_private.h:322: error: par...

Tried to compile 0.9.0 with kernel 2.4.6 on a RH7.1 machine with the latest gcc updates installed. gcc -D__KERNEL__ -I/usr/src/linux/include -Wall -Wstrict-prototypes -Wno-trigraphs -O2 -fomit-frame-pointer -fno-strict-aliasing -pipe -mpreferred-stack-boundary=2 -march=k6 -c -o sysctl.o sysctl.c sysctl.c:317: `journal_oom_retry' undeclared here (not in a function) sysctl.c:317: initializer element is not constant sysctl.c:317: (near initialization for `fs_table[14].data') make[2]: *** [sysctl.o] Error 1 Klaasjan Brand kjb@d...