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Support procedures for testing profile-directed optimizations.
From-SVN: r45525
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Janis Johnson
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284
gcc/testsuite/lib/profopt.exp
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284
gcc/testsuite/lib/profopt.exp
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# Copyright (C) 2001 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#
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# This script was submitted by Janis Johnson <janis187@us.ibm.com>.
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# Test the functionality and optionally, performance improvement, of
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# programs compiled with profile-directed optimizations. Compile and
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# run a test with profile options, compile it with options using the
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# profile feedback, and then run the test again. Optionally compile
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# and run a third time without the profile-directed optimization and
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# compare timing results of the program with normal optimization and
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# with the profile-directed optimization. Each test is run using
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# multiple sets of optimization and/or code generation options in
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# addition to the profiling and feedback options.
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# If perf_ext is defined and the performance value for the
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# profile-directed test run is non-zero then the performance check will
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# be done.
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global PROFOPT_OPTIONS perf_delta
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# The including .exp file must define these.
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global tool profile_option feedback_option prof_ext
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if ![info exists tool] {
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error "Tools is not specified."
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}
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if ![info exists profile_option] {
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error "No profile option specified for first compile."
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}
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if ![info exists feedback_option] {
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error "No feedback option specified for second compile."
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}
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if ![info exists prof_ext] {
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error "No profile data file extension specified."
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}
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# The maximum perforance degradation can be defined in the including file.
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if ![info exists perf_delta] {
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set perf_delta 4
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}
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# The default option list can be overridden by
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# PROFOPT_OPTIONS="{ { list1 } ... { list2 } }"
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if ![info exists PROFOPT_OPTIONS] {
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set PROFOPT_OPTIONS [list \
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{ -g } \
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{ -O0 } \
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{ -O1 } \
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{ -O2 } \
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{ -O3 } \
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{ -O3 -g } \
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{ -Os } ]
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}
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set option_list $PROFOPT_OPTIONS
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#
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# profopt-cleanup -- remove profiling or performance results files.
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#
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# EXT is the extension of files to remove
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#
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proc profopt-cleanup { ext } {
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set files [glob -nocomplain *.$ext]
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if { $files != "" } {
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eval "remote_file build delete $files"
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}
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}
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#
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# profopt-perf-value -- get performance value for a test
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#
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# TESTCASE is the name of the test
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# PERF_EXT is the extension of the performance result file
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# OPTSTR is the string of compiler options
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#
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proc profopt-perf-value { testcase perf_ext optstr } {
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set basename [file tail $testcase]
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set base [file rootname $basename]
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set files [glob -nocomplain $base.$perf_ext]
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# The file doesn't exist; let the caller decide if that's a problem.
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if { $files == "" } {
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return -2
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}
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remote_upload host $base.$perf_ext $base.$perf_ext
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set fd [open $base.$perf_ext r]
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gets $fd line
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set val -2
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if [regexp "TIME" $line] {
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if [regexp "TIME -1" $line] {
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fail "$testcase perf check: no consistent time available, $optstr"
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set val -1
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} elseif ![regexp "(\[0-9\]+)" "$line" val] {
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set val -2
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}
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}
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# Report problems with an existing file.
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if { $val == -2 } {
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fail "$testcase perf check: file $base.$perf_ext has wrong format, $optstr"
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}
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close $fd
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profopt-cleanup $perf_ext
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return $val
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}
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#
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# c-prof-execute -- compile for profiling and then feedback, then normal
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#
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# SRC is the full pathname of the testcase.
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#
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proc profopt-execute { src } {
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global srcdir tmpdir
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global option_list
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global tool profile_option feedback_option prof_ext perf_ext perf_delta
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global verbose
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regsub "^$srcdir/?" $src "" testcase
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# If we couldn't rip $srcdir out of `src' then just do the best we can.
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# The point is to reduce the unnecessary noise in the logs. Don't strip
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# out too much because different testcases with the same name can confuse
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# `test-tool'.
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if [string match "/*" $testcase] {
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set testcase "[file tail [file dirname $src]]/[file tail $src]"
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}
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set executable $tmpdir/[file tail [file rootname $src].x]
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set count 0
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foreach option $option_list {
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set execname1 "${executable}${count}1"
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set execname2 "${executable}${count}2"
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set execname3 "${executable}${count}3"
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incr count
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remote_file build delete $execname1
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remote_file build delete $execname2
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remote_file build delete $execname3
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verbose "Testing $testcase, $option" 1
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# Compile for profiling.
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set options ""
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lappend options "additional_flags=$option $profile_option"
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set optstr "$option $profile_option"
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set comp_output [${tool}_target_compile "$src" "$execname1" executable $options];
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if ![${tool}_check_compile "$testcase compilation" $optstr $execname1 $comp_output] {
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unresolved "$testcase execution, $optstr"
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unresolved "$testcase compilation, $option $feedback_option"
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unresolved "$testcase execution, $option $feedback_option"
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continue
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}
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# Run the profiled test.
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set result [${tool}_load $execname1 "" ""]
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set status [lindex $result 0]
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# Make sure the profile data was generated, and fail if not.
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if { $status == "pass" } {
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set basename [file tail $testcase]
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set base [file rootname $basename]
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set files [glob -nocomplain $base.$prof_ext]
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if { $files == "" } {
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set status "fail"
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fail "$testcase execution: file $base.$prof_ext does not exist, $option $profile_option"
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} else {
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$status "$testcase execution, $optstr"
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}
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} else {
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$status "$testcase execution, $optstr"
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}
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# Quit for this round if it failed
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if { $status != "pass" } {
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unresolved "$testcase compilation, $option $feedback_option"
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unresolved "$testcase execution, $option $feedback_option"
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continue
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}
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remote_file build delete $execname1
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# Compile with feedback-directed optimizations.
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set options ""
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lappend options "additional_flags=$option $feedback_option"
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set optstr "$option $feedback_option"
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set comp_output [${tool}_target_compile "$src" "$execname2" "executable" $options];
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if ![${tool}_check_compile "$testcase compilation" $optstr $execname2 $comp_output] {
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unresolved "$testcase execution, $optstr"
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continue
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}
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# Run the profile-directed optimized test.
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set result [${tool}_load "$execname2" "" ""]
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set status [lindex $result 0]
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$status "$testcase execution, $optstr"
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if { $status != "pass" } {
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continue
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}
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# Remove the profiling data files.
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profopt-cleanup $prof_ext
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# If the test is not expected to produce performance data then
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# we're done now.
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if ![info exists perf_ext] {
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remote_file build delete $execname2
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continue
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}
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# Get the performance data from the test built with
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# profile-directed optimization. If the file doesn't exist or if
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# the value is zero, skip the performance comparison.
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set val2 [profopt-perf-value $testcase $perf_ext $optstr]
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if { $val2 <= 0 } {
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remote_file build delete $execname2
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continue
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}
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# Compile with normal optimizations.
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set options ""
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lappend options "additional_flags=$option"
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set optstr "$option"
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set comp_output [${tool}_target_compile "$src" "$execname3" "executable" $options];
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if ![${tool}_check_compile "$testcase compilation" $optstr $execname3 $comp_output] {
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unresolved "$testcase execution, $optstr"
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unresolved "$testcase perf check, $optstr"
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continue
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}
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# Run the test with normal optimizations.
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set result [${tool}_load "$execname3" "" ""]
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set status [lindex $result 0]
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$status "$testcase execution, $optstr"
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if { $status != "pass" } {
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unresolved "$testcase perf check, $optstr"
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continue
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}
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# Get the performance data from the test built with normal
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# optimization.
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set val1 [profopt-perf-value $testcase $perf_ext $optstr]
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if { $val1 < 0 } {
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if { $val1 == -2 } {
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# The data file existed with the profile-directed
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# optimization so this one should, too.
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fail "$testcase perf check: file $base.$perf_ext does not exist, $optstr"
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}
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continue
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}
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# Compare results of the two runs and fail if the time with the
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# profile-directed optimization is significantly more than the time
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# without it.
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set status "pass"
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if { $val2 > $val1 } {
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# Check for a performance degration outside of allowable limits.
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if { [expr $val2 - $val1] > [expr [expr $val1 * $perf_delta] / 100] } {
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set status "fail"
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}
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}
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if { $status == "fail" } {
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fail "$testcase perf check: orig: $val1 new: $val2, $optstr"
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} else {
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$status "$testcase perf check, $optstr"
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verbose "$testcase orig: $val1 new: $val2, $optstr" 2
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remote_file build delete $execname2
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remote_file build delete $execname3
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}
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}
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}
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