gcc/testsuite/lib/profopt.exp

   1 # Copyright (C) 2001-2015 Free Software Foundation, Inc.
   2
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License as published by
   5 # the Free Software Foundation; either version 3 of the License, or
   6 # (at your option) any later version.
   7 #
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU General Public License for more details.
  12 #
  13 # You should have received a copy of the GNU General Public License
  14 # along with GCC; see the file COPYING3.  If not see
  15 # <http://www.gnu.org/licenses/>.
  16 #
  17 # This script was submitted by Janis Johnson <janis187@us.ibm.com>.
  18
  19 # Test the functionality and optionally, performance improvement, of
  20 # programs compiled with profile-directed optimizations.  Compile and
  21 # run a test with profile options, compile it with options using the
  22 # profile feedback, and then run the test again.  Optionally compile
  23 # and run a third time without the profile-directed optimization and
  24 # compare timing results of the program with normal optimization and
  25 # with the profile-directed optimization. Each test is run using
  26 # multiple sets of optimization and/or code generation options in
  27 # addition to the profiling and feedback options.
  28
  29 # If perf_ext is defined and the performance value for the
  30 # profile-directed test run is nonzero then the performance check will
  31 # be done.
  32
  33 load_lib dg.exp
  34 load_lib gcc-dg.exp
  35
  36 global PROFOPT_OPTIONS perf_delta
  37
  38 # The including .exp file must define these.
  39 global tool profile_option feedback_option prof_ext
  40 if ![info exists tool] {
  41     error "Tools is not specified."
  42 }
  43 if ![info exists prof_ext] {
  44     error "No profile data file extensions specified."
  45 }
  46
  47 # The maximum perforance degradation can be defined in the including file.
  48 if ![info exists perf_delta] {
  49     set perf_delta 4
  50 }
  51
  52 # The default option list can be overridden by
  53 # PROFOPT_OPTIONS="{ { list1 } ... { list2 } }"
  54
  55 if ![info exists PROFOPT_OPTIONS] {
  56     set PROFOPT_OPTIONS [list \
  57         { -g } \
  58         { -O0 } \
  59         { -O1 } \
  60         { -O2 } \
  61         { -O3 } \
  62         { -O3 -g } \
  63         { -Os } ]
  64 }
  65
  66 #
  67 # profopt-cleanup -- remove profiling or performance results files.
  68 #
  69 # TESTCASE is the name of the test
  70 # EXT is the extensions of files to remove
  71 #
  72 proc profopt-cleanup { testcase extlist } {
  73     set basename [file tail $testcase]
  74     set base [file rootname $basename]
  75     foreach ext $extlist {
  76         set files [glob -nocomplain $base.$ext]
  77         if { $files != "" } {
  78             eval "remote_file build delete $files"
  79         }
  80     }
  81 }
  82
  83 #
  84 # profopt-target-cleanup -- remove profiling result files.
  85 #
  86 # DIR is the name of the directory
  87 # TESTCASE is the name of the test
  88 # EXT is the extensions of files to remove
  89 #
  90 proc profopt-target-cleanup { dir testcase ext } {
  91     global additional_sources_used
  92     set basename [file tail $testcase]
  93     set base [file rootname $basename]
  94     set file "$dir/$base.$ext"
  95     eval "remote_file target delete $file"
  96
  97     if [info exists additional_sources_used] {
  98         foreach srcfile $additional_sources_used {
  99             set basename [file tail $srcfile]
 100             set base [file rootname $basename]
 101             set file "$dir/$base.$ext"
 102             eval "remote_file target delete $file"
 103         }
 104     }
 105 }
 106
 107 #
 108 # profopt-perf-value -- get performance value for a test
 109 #
 110 # TESTCASE is the name of the test
 111 # PERF_EXT is the extension of the performance result file
 112 # OPTSTR is the string of compiler options
 113 #
 114 proc profopt-perf-value { testcase perf_ext optstr } {
 115     set basename [file tail $testcase]
 116     set base [file rootname $basename]
 117     set files [glob -nocomplain $base.$perf_ext]
 118     # The file doesn't exist; let the caller decide if that's a problem.
 119     if { $files == "" } {
 120         return -2
 121     }
 122     remote_upload host $base.$perf_ext $base.$perf_ext
 123     set fd [open $base.$perf_ext r]
 124     gets $fd line
 125     set val -2
 126     if [regexp "TIME" $line] {
 127         if [regexp "TIME -1" $line] {
 128             fail "$testcase perf check: no consistent time available, $optstr"
 129             set val -1
 130         } elseif ![regexp "(\[0-9\]+)" "$line" val] {
 131             set val -2
 132         }
 133     }
 134     # Report problems with an existing file.
 135     if { $val == -2 } {
 136         fail "$testcase perf check: file $base.$perf_ext has wrong format, $optstr"
 137     }
 138     close $fd
 139     profopt-cleanup $testcase $perf_ext
 140     return $val
 141 }
 142
 143 #
 144 # dg-final-generate -- process code to run after the profile-generate step
 145 #
 146 # ARGS is the line number of the directive followed by the commands.
 147 #
 148 proc dg-final-generate { args } {
 149     global generate_final_code
 150
 151     if { [llength $args] > 2 } {
 152         error "[lindex $args 0]: too many arguments"
 153         return
 154     }
 155     append generate_final_code "[lindex $args 1]\n"
 156 }
 157
 158 #
 159 # dg-final-use -- process code to run after the profile-use step
 160 #
 161 # ARGS is the line number of the directive followed by the commands.
 162 #
 163 proc dg-final-use { args } {
 164     global use_final_code
 165
 166     if { [llength $args] > 2 } {
 167         error "[lindex $args 0]: too many arguments"
 168         return
 169     }
 170     append use_final_code "[lindex $args 1]\n"
 171 }
 172
 173 #
 174 # profopt-final-code -- run final code
 175 #
 176 # WHICH is "generate" or "use".
 177 # FINAL_CODE is the TCL code to run.
 178 # TESTCASE is the name of the test, for error messages.
 179 #
 180 proc profopt-final-code { which final_code name } {
 181     # This is copied from dg-test in dg.exp of DejaGnu.
 182     regsub -all "\\\\(\[{}\])" $final_code "\\1" final_code
 183     proc profopt-final-proc { args } $final_code
 184     if [catch "profopt-final-proc $name" errmsg] {
 185         perror "$name: error executing dg-final-${which}: $errmsg"
 186         unresolved "$name: Error executing dg-final-${which}: $errmsg"
 187     }
 188 }
 189
 190 #
 191 # profopt-get-options -- process test directives
 192 #
 193 # SRC is the full pathname of the testcase.
 194 #
 195 proc profopt-get-options { src } {
 196     # dg-options sets a variable called dg-extra-tool-flags.
 197     set dg-extra-tool-flags ""
 198
 199     # dg-require-* sets dg-do-what.
 200     upvar dg-do-what dg-do-what
 201
 202     # current_compiler_flags reads tool_flags from the same stack frame
 203     # as dg-extra-tool-flags
 204     set tool_flags ""
 205
 206     set tmp [dg-get-options $src]
 207     foreach op $tmp {
 208         set cmd [lindex $op 0]
 209         if { ![string compare "dg-options" $cmd] \
 210              || ![string compare "dg-skip-if" $cmd] \
 211              || ![string compare "dg-final-generate" $cmd] \
 212              || ![string compare "dg-final-use" $cmd] \
 213              || ![string compare "dg-additional-sources" $cmd] \
 214              || [string match "dg-require-*" $cmd]  } {
 215             set status [catch "$op" errmsg]
 216             if { $status != 0 } {
 217                 perror "$src: $errmsg for \"$op\"\n"
 218                 unresolved "$src: $errmsg for \"$op\""
 219                 return
 220             }
 221         } else {
 222             # Ignore unrecognized dg- commands, but warn about them.
 223             warning "profopt.exp does not support $cmd"
 224         }
 225     }
 226
 227     # Return flags to use for compiling the primary source file and for
 228     # linking.
 229     return ${dg-extra-tool-flags}
 230 }
 231
 232 #
 233 # c-prof-execute -- compile for profiling and then feedback, then normal
 234 #
 235 # SRC is the full pathname of the testcase.
 236 #
 237 proc profopt-execute { src } {
 238     global srcdir tmpdir
 239     global PROFOPT_OPTIONS
 240     global tool profile_option feedback_option prof_ext perf_ext perf_delta
 241     global generate_final_code use_final_code
 242     global verbose
 243     global testname_with_flags
 244
 245     if ![info exists profile_option] {
 246         error "No profile option specified for first compile."
 247     }
 248     if ![info exists feedback_option] {
 249         error "No feedback option specified for second compile."
 250     }
 251
 252     # Use the default option list or one defined for a set of tests.
 253     if ![info exists PROFOPT_OPTIONS] {
 254          error "PROFOPT_OPTIONS is not defined"
 255     }
 256     set prof_option_list $PROFOPT_OPTIONS
 257
 258     regsub "(?q)$srcdir/" $src "" testcase
 259     # If we couldn't rip $srcdir out of `src' then just do the best we can.
 260     # The point is to reduce the unnecessary noise in the logs.  Don't strip
 261     # out too much because different testcases with the same name can confuse
 262     # `test-tool'.
 263     if [string match "/*" $testcase] {
 264         set testcase "[file tail [file dirname $src]]/[file tail $src]"
 265     }
 266
 267     # Several procedures access the name of the test with torture flags,
 268     # normally defined in dg-test.  Profile optimization tests don't
 269     # use dg-test, so define it here to make it accessible via
 270     # testname-for-summary.
 271     set testname_with_flags $testcase
 272
 273     set executable $tmpdir/[file tail [file rootname $src].x]
 274     set basename [file tail $testcase]
 275     set base [file rootname $basename]
 276
 277     set count 0
 278     foreach option $prof_option_list {
 279         set execname1 "${executable}${count}1"
 280         set execname2 "${executable}${count}2"
 281         set execname3 "${executable}${count}3"
 282         incr count
 283
 284         remote_file build delete $execname1
 285         remote_file build delete $execname2
 286         remote_file build delete $execname3
 287         verbose "Testing $testcase, $option" 1
 288
 289         # Remove old performance data files.
 290         if [info exists perf_ext] {
 291             profopt-cleanup $testcase $perf_ext
 292         }
 293
 294         # Process test directives.
 295
 296         set generate_final_code ""
 297         set use_final_code ""
 298         set dg-do-what [list "run" "" P]
 299         set extra_flags [profopt-get-options $src]
 300         if { [lindex ${dg-do-what} 1 ] == "N" } {
 301             unsupported "$testcase"
 302             unset testname_with_flags
 303             verbose "$src not supported on this target, skipping it" 3
 304             return
 305         }
 306
 307         set extra_options [dg-additional-files-options "" "$src"]
 308
 309         # Remove old profiling data files.  Make sure additional_sources_used is
 310         # valid, by running it after dg-additional-files-options.
 311         foreach ext $prof_ext {
 312             profopt-target-cleanup $tmpdir $base $ext
 313         }
 314
 315         # Tree profiling requires TLS runtime support, which may need
 316         # additional flags.
 317         if { [string first "-fprofile-generate" $profile_option] >= 0 } {
 318             set extra_flags [add_options_for_tls $extra_flags]
 319         }
 320
 321         # Compile for profiling.
 322
 323         set options "$extra_options"
 324         lappend options "additional_flags=$option $extra_flags $profile_option"
 325         set optstr "$option $profile_option"
 326         set comp_output [${tool}_target_compile "$src" "$execname1" executable $options]
 327         if ![${tool}_check_compile "$testcase compilation" $optstr $execname1 $comp_output] {
 328             unresolved "$testcase execution,   $optstr"
 329             unresolved "$testcase compilation, $option $feedback_option"
 330             unresolved "$testcase execution,   $option $feedback_option"
 331             continue
 332         }
 333
 334         # Run the profiled test.
 335
 336         set result [${tool}_load $execname1 "" ""]
 337         set status [lindex $result 0]
 338         set missing_file 0
 339         # Make sure the profile data was generated, and fail if not.
 340         if { $status == "pass" } {
 341             foreach ext $prof_ext {
 342                 remote_upload target $tmpdir/$base.$ext
 343                 set files [glob -nocomplain $base.$ext]
 344                 if { $files == "" } {
 345                     set status "fail"
 346                     set missing_file 1
 347                     fail "$testcase execution: file $base.$ext does not exist, $option $profile_option"
 348                 }
 349             }
 350         }
 351         if { $missing_file == 0 } {
 352             $status "$testcase execution,   $optstr"
 353         }
 354
 355         # If there is dg-final code to execute for the generate step, do it
 356         # even if it failed; it might clean up temporary files.
 357         if ![string match $generate_final_code ""] {
 358             profopt-final-code "generate" $generate_final_code $testcase
 359         }
 360
 361         remote_file build delete $execname1
 362
 363         # Quit for this round if it failed
 364         if { $status != "pass" } {
 365             unresolved "$testcase compilation, $option $feedback_option"
 366             unresolved "$testcase execution,   $option $feedback_option"
 367             continue
 368         }
 369
 370         # Compile with feedback-directed optimizations.
 371
 372         set options "$extra_options"
 373         lappend options "additional_flags=$option $extra_flags $feedback_option"
 374         set optstr "$option $feedback_option"
 375         set comp_output [${tool}_target_compile "$src" "$execname2" "executable" $options]
 376
 377         # Prune warnings we know are unwanted.
 378         set comp_output [prune_warnings $comp_output]
 379
 380         if ![${tool}_check_compile "$testcase compilation" $optstr $execname2 $comp_output] {
 381             unresolved "$testcase execution,   $optstr"
 382             continue
 383         }
 384
 385         # Run the profile-directed optimized test.
 386
 387         set result [${tool}_load "$execname2" "" ""]
 388         set status [lindex $result 0]
 389         $status "$testcase execution,   $optstr"
 390
 391         # If there is dg-final code to execute for the use step, do it.
 392         if ![string match $use_final_code ""] {
 393             profopt-final-code "use" $use_final_code $testcase
 394         }
 395
 396         # Remove the profiling data files.
 397         foreach ext $prof_ext {
 398             profopt-target-cleanup $tmpdir $base $ext
 399         }
 400
 401         if { $status != "pass" } {
 402             continue
 403         }
 404
 405         # If the test is not expected to produce performance data then
 406         # we're done now.
 407         if ![info exists perf_ext] {
 408             remote_file build delete $execname2
 409             continue
 410         }
 411
 412         # Get the performance data from the test built with
 413         # profile-directed optimization.  If the file doesn't exist or if
 414         # the value is zero, skip the performance comparison.
 415         set val2 [profopt-perf-value $testcase $perf_ext $optstr]
 416         if { $val2 <= 0 } {
 417             remote_file build delete $execname2
 418             continue
 419         }
 420
 421         # Compile with normal optimizations.
 422
 423         set options "$extra_options"
 424         lappend options "additional_flags=$option"
 425         set optstr "$option"
 426         set comp_output [${tool}_target_compile "$src" "$execname3" "executable" $options]
 427         if ![${tool}_check_compile "$testcase compilation" $optstr $execname3 $comp_output] {
 428             unresolved "$testcase execution,   $optstr"
 429             unresolved "$testcase perf check,  $optstr"
 430             continue
 431         }
 432
 433         # Run the test with normal optimizations.
 434
 435         set result [${tool}_load "$execname3" "" ""]
 436         set status [lindex $result 0]
 437         $status "$testcase execution,   $optstr"
 438         if { $status != "pass" } {
 439             unresolved "$testcase perf check, $optstr"
 440             continue
 441         }
 442
 443         # Get the performance data from the test built with normal
 444         # optimization.
 445         set val1 [profopt-perf-value $testcase $perf_ext $optstr]
 446         if { $val1 < 0 } {
 447             if { $val1 == -2 } {
 448                 # The data file existed with the profile-directed
 449                 # optimization so this one should, too.
 450                 fail "$testcase perf check: file $base.$perf_ext does not exist, $optstr"
 451             }
 452             continue
 453         }
 454
 455         # Compare results of the two runs and fail if the time with the
 456         # profile-directed optimization is significantly more than the time
 457         # without it.
 458         set status "pass"
 459         if { $val2 > $val1 } {
 460             # Check for a performance degration outside of allowable limits.
 461             if { [expr $val2 - $val1] > [expr [expr $val1 * $perf_delta] / 100] } {
 462                 set status "fail"
 463             }
 464         }
 465         if { $status == "fail" } {
 466             fail "$testcase perf check: orig: $val1  new: $val2, $optstr"
 467         } else {
 468             $status "$testcase perf check,  $optstr"
 469             verbose "$testcase orig: $val1  new: $val2, $optstr" 2
 470             remote_file build delete $execname2
 471             remote_file build delete $execname3
 472         }
 473     }
 474     unset testname_with_flags
 475 }