# Copyright (C) 2001, 2004, 2005, 2007 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GCC; see the file COPYING3. If not see
# .
#
# This script was submitted by Janis Johnson .
# Test the functionality and optionally, performance improvement, of
# programs compiled with profile-directed optimizations. Compile and
# run a test with profile options, compile it with options using the
# profile feedback, and then run the test again. Optionally compile
# and run a third time without the profile-directed optimization and
# compare timing results of the program with normal optimization and
# with the profile-directed optimization. Each test is run using
# multiple sets of optimization and/or code generation options in
# addition to the profiling and feedback options.
# If perf_ext is defined and the performance value for the
# profile-directed test run is nonzero then the performance check will
# be done.
load_lib dg.exp
load_lib gcc-dg.exp
global PROFOPT_OPTIONS perf_delta
# The including .exp file must define these.
global tool profile_option feedback_option prof_ext
if ![info exists tool] {
error "Tools is not specified."
}
if ![info exists prof_ext] {
error "No profile data file extensions specified."
}
# The maximum perforance degradation can be defined in the including file.
if ![info exists perf_delta] {
set perf_delta 4
}
# The default option list can be overridden by
# PROFOPT_OPTIONS="{ { list1 } ... { list2 } }"
if ![info exists PROFOPT_OPTIONS] {
set PROFOPT_OPTIONS [list \
{ -g } \
{ -O0 } \
{ -O1 } \
{ -O2 } \
{ -O3 } \
{ -O3 -g } \
{ -Os } ]
}
set prof_option_list $PROFOPT_OPTIONS
#
# profopt-cleanup -- remove profiling or performance results files.
#
# TESTCASE is the name of the test
# EXT is the extensions of files to remove
#
proc profopt-cleanup { testcase extlist } {
set basename [file tail $testcase]
set base [file rootname $basename]
foreach ext $extlist {
set files [glob -nocomplain $base.$ext]
if { $files != "" } {
eval "remote_file build delete $files"
}
}
}
#
# profopt-perf-value -- get performance value for a test
#
# TESTCASE is the name of the test
# PERF_EXT is the extension of the performance result file
# OPTSTR is the string of compiler options
#
proc profopt-perf-value { testcase perf_ext optstr } {
set basename [file tail $testcase]
set base [file rootname $basename]
set files [glob -nocomplain $base.$perf_ext]
# The file doesn't exist; let the caller decide if that's a problem.
if { $files == "" } {
return -2
}
remote_upload host $base.$perf_ext $base.$perf_ext
set fd [open $base.$perf_ext r]
gets $fd line
set val -2
if [regexp "TIME" $line] {
if [regexp "TIME -1" $line] {
fail "$testcase perf check: no consistent time available, $optstr"
set val -1
} elseif ![regexp "(\[0-9\]+)" "$line" val] {
set val -2
}
}
# Report problems with an existing file.
if { $val == -2 } {
fail "$testcase perf check: file $base.$perf_ext has wrong format, $optstr"
}
close $fd
profopt-cleanup $testcase $perf_ext
return $val
}
#
# dg-final-generate -- process code to run after the profile-generate step
#
# ARGS is the line number of the directive followed by the commands.
#
proc dg-final-generate { args } {
global generate_final_code
if { [llength $args] > 2 } {
error "[lindex $args 0]: too many arguments"
return
}
append generate_final_code "[lindex $args 1]\n"
}
#
# dg-final-use -- process code to run after the profile-use step
#
# ARGS is the line number of the directive followed by the commands.
#
proc dg-final-use { args } {
global use_final_code
if { [llength $args] > 2 } {
error "[lindex $args 0]: too many arguments"
return
}
append use_final_code "[lindex $args 1]\n"
}
#
# profopt-final-code -- run final code
#
# WHICH is "generate" or "use".
# FINAL_CODE is the TCL code to run.
# TESTCASE is the name of the test, for error messages.
#
proc profopt-final-code { which final_code name } {
# This is copied from dg-test in dg.exp of DejaGnu.
regsub -all "\\\\(\[{}\])" $final_code "\\1" final_code
proc profopt-final-proc { args } $final_code
if [catch "profopt-final-proc $name" errmsg] {
perror "$name: error executing dg-final-${which}: $errmsg"
unresolved "$name: Error executing dg-final-${which}: $errmsg"
}
}
#
# profopt-get-options -- process test directives
#
# SRC is the full pathname of the testcase.
#
proc profopt-get-options { src } {
# dg-options sets a variable called dg-extra-tool-flags.
set dg-extra-tool-flags ""
# dg-require-* sets dg-do-what.
upvar dg-do-what dg-do-what
set tmp [dg-get-options $src]
foreach op $tmp {
set cmd [lindex $op 0]
if { ![string compare "dg-options" $cmd] \
|| ![string compare "dg-skip-if" $cmd] \
|| ![string compare "dg-final-generate" $cmd] \
|| ![string compare "dg-final-use" $cmd] \
|| [string match "dg-require-*" $cmd] } {
set status [catch "$op" errmsg]
if { $status != 0 } {
perror "src: $errmsg for \"$op\"\n"
unresolved "$src: $errmsg for \"$op\""
return
}
} else {
# Ignore unrecognized dg- commands, but warn about them.
warning "compat.exp does not support $cmd"
}
}
# Return flags to use for compiling the primary source file and for
# linking.
return ${dg-extra-tool-flags}
}
#
# c-prof-execute -- compile for profiling and then feedback, then normal
#
# SRC is the full pathname of the testcase.
#
proc profopt-execute { src } {
global srcdir tmpdir
global prof_option_list
global tool profile_option feedback_option prof_ext perf_ext perf_delta
global generate_final_code use_final_code
global verbose
if ![info exists profile_option] {
error "No profile option specified for first compile."
}
if ![info exists feedback_option] {
error "No feedback option specified for second compile."
}
regsub "(?q)$srcdir/" $src "" testcase
# If we couldn't rip $srcdir out of `src' then just do the best we can.
# The point is to reduce the unnecessary noise in the logs. Don't strip
# out too much because different testcases with the same name can confuse
# `test-tool'.
if [string match "/*" $testcase] {
set testcase "[file tail [file dirname $src]]/[file tail $src]"
}
set executable $tmpdir/[file tail [file rootname $src].x]
set basename [file tail $testcase]
set base [file rootname $basename]
set count 0
foreach option $prof_option_list {
set execname1 "${executable}${count}1"
set execname2 "${executable}${count}2"
set execname3 "${executable}${count}3"
incr count
remote_file build delete $execname1
remote_file build delete $execname2
remote_file build delete $execname3
verbose "Testing $testcase, $option" 1
# Remove old profiling and performance data files.
foreach ext $prof_ext {
remote_file target delete $tmpdir/$base.$ext
}
if [info exists perf_ext] {
profopt-cleanup $testcase $perf_ext
}
# Process test directives.
set generate_final_code ""
set use_final_code ""
set dg-do-what [list "run" "" P]
set extra_flags [profopt-get-options $src]
if { [lindex ${dg-do-what} 1 ] == "N" } {
unsupported "$src"
verbose "$src not supported on this target, skipping it" 3
return
}
# Compile for profiling.
set options ""
lappend options "additional_flags=$option $extra_flags $profile_option"
set optstr "$option $profile_option"
set comp_output [${tool}_target_compile "$src" "$execname1" executable $options]
if ![${tool}_check_compile "$testcase compilation" $optstr $execname1 $comp_output] {
unresolved "$testcase execution, $optstr"
unresolved "$testcase compilation, $option $feedback_option"
unresolved "$testcase execution, $option $feedback_option"
continue
}
# Run the profiled test.
set result [${tool}_load $execname1 "" ""]
set status [lindex $result 0]
set missing_file 0
# Make sure the profile data was generated, and fail if not.
if { $status == "pass" } {
foreach ext $prof_ext {
remote_upload target $tmpdir/$base.$ext
set files [glob -nocomplain $base.$ext]
if { $files == "" } {
set status "fail"
set missing_file 1
fail "$testcase execution: file $base.$ext does not exist, $option $profile_option"
}
}
}
if { $missing_file == 0 } {
$status "$testcase execution, $optstr"
}
# If there is dg-final code to execute for the generate step, do it
# even if it failed; it might clean up temporary files.
if ![string match $generate_final_code ""] {
profopt-final-code "generate" $generate_final_code $testcase
}
remote_file build delete $execname1
# Quit for this round if it failed
if { $status != "pass" } {
unresolved "$testcase compilation, $option $feedback_option"
unresolved "$testcase execution, $option $feedback_option"
continue
}
# Compile with feedback-directed optimizations.
set options ""
lappend options "additional_flags=$option $extra_flags $feedback_option"
set optstr "$option $feedback_option"
set comp_output [${tool}_target_compile "$src" "$execname2" "executable" $options]
if ![${tool}_check_compile "$testcase compilation" $optstr $execname2 $comp_output] {
unresolved "$testcase execution, $optstr"
continue
}
# Run the profile-directed optimized test.
set result [${tool}_load "$execname2" "" ""]
set status [lindex $result 0]
$status "$testcase execution, $optstr"
# If there is dg-final code to execute for the use step, do it.
if ![string match $use_final_code ""] {
profopt-final-code "use" $use_final_code $testcase
}
# Remove the profiling data files.
foreach ext $prof_ext {
remote_file target delete $tmpdir/$base.$ext
}
if { $status != "pass" } {
continue
}
# If the test is not expected to produce performance data then
# we're done now.
if ![info exists perf_ext] {
remote_file build delete $execname2
continue
}
# Get the performance data from the test built with
# profile-directed optimization. If the file doesn't exist or if
# the value is zero, skip the performance comparison.
set val2 [profopt-perf-value $testcase $perf_ext $optstr]
if { $val2 <= 0 } {
remote_file build delete $execname2
continue
}
# Compile with normal optimizations.
set options ""
lappend options "additional_flags=$option"
set optstr "$option"
set comp_output [${tool}_target_compile "$src" "$execname3" "executable" $options]
if ![${tool}_check_compile "$testcase compilation" $optstr $execname3 $comp_output] {
unresolved "$testcase execution, $optstr"
unresolved "$testcase perf check, $optstr"
continue
}
# Run the test with normal optimizations.
set result [${tool}_load "$execname3" "" ""]
set status [lindex $result 0]
$status "$testcase execution, $optstr"
if { $status != "pass" } {
unresolved "$testcase perf check, $optstr"
continue
}
# Get the performance data from the test built with normal
# optimization.
set val1 [profopt-perf-value $testcase $perf_ext $optstr]
if { $val1 < 0 } {
if { $val1 == -2 } {
# The data file existed with the profile-directed
# optimization so this one should, too.
fail "$testcase perf check: file $base.$perf_ext does not exist, $optstr"
}
continue
}
# Compare results of the two runs and fail if the time with the
# profile-directed optimization is significantly more than the time
# without it.
set status "pass"
if { $val2 > $val1 } {
# Check for a performance degration outside of allowable limits.
if { [expr $val2 - $val1] > [expr [expr $val1 * $perf_delta] / 100] } {
set status "fail"
}
}
if { $status == "fail" } {
fail "$testcase perf check: orig: $val1 new: $val2, $optstr"
} else {
$status "$testcase perf check, $optstr"
verbose "$testcase orig: $val1 new: $val2, $optstr" 2
remote_file build delete $execname2
remote_file build delete $execname3
}
}
}