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Old 12-09-2003
Arithmetic tests needs to be updated for advanced compiler optimization
Hi,
I was trying to build Linux Benchmarks with latest Intel C++ Compiler.
When I used -ipo (inter-procedural optimization) option, arithmetic test (arith.c) failed on execution.

The problem is Intel compiler's advanced optimization option (-ipo) optimizes much more than expected and this results in elimination of some part of code.
/-------------------------------------------------
++iter;
/* the loop calls a function to insure that something is done
the results of the function are fed back in (just so they
they won't be thrown away. A loop with
unused assignments may get optimized out of existence */
result = dumb_stuff(result);
/--------------------------------------------------------

This part gets eliminated becuase of IPO.

Steps to reproduce:
$icc -o ./pgms/arithoh -DTIME -O3 -xW -ipo -static -unroll -Darithoh ./src/arith.c

$./pgms/arithoh 1
0 loops

and this results in divide by zero error.

Regards,
CP
 
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LEARN ABOUT DEBIAN

linux::distribution

Linux::Distribution(3pm)				User Contributed Perl Documentation				  Linux::Distribution(3pm)

NAME

       Linux::Distribution - Perl extension to detect on which Linux distribution we are running.

SYNOPSIS

	 use Linux::Distribution qw(distribution_name distribution_version);

	 if(my $distro = distribution_name) {
	       my $version = distribution_version();
	       print "you are running $distro, version $version
";
	 } else {
	       print "distribution unknown
";
	 }

	 Or else do it OO:

	 use Linux::Distribution qw(distribution_name distribution_version);

	 my $linux = Linux::Distribution->new;
	 if(my $distro = $linux->distribution_name()) {
	       my $version = $linux->distribution_version();
	       print "you are running $distro, version $version
";
	 } else {
	       print "distribution unknown
";
	 }

DESCRIPTION

       This is a simple module that tries to guess on what linux distribution we are running by looking for release's files in /etc.  It now looks
       for 'lsb-release' first as that should be the most correct and adds ubuntu support.  Secondly, it will look for the distro specific files.

       It currently recognizes slackware, debian, suse, fedora, redhat, turbolinux, yellowdog, knoppix, mandrake, conectiva, immunix, tinysofa,
       va-linux, trustix, adamantix, yoper, arch-linux, libranet, gentoo, ubuntu, scientific, oracle enterprise linux and redflag.

       It has function to get the version for debian, suse, fedora, redhat, gentoo, slackware, scientific, oracle enterprise linux, redflag and
       ubuntu(lsb). People running unsupported distro's are greatly encouraged to submit patches :-)

   EXPORT
       None by default.

TODO

       Add the capability of recognize the version of the distribution for all recognized distributions.

AUTHORS

       Alexandr Ciornii <alexchorny@gmail.com>, <http://chorny.net> Alberto Re, <alberto@accidia.net> Judith Lebzelter, <judith@osdl.org>

COPYRIGHT AND LICENSE

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.5 or,
       at your option, any later version of Perl 5 you may have available.

perl v5.14.2							    2012-03-18						  Linux::Distribution(3pm)