[PING, two months] libgomp: In OpenACC testing, cycle though $offload_targets, and by default only build for the offload target that we're actually going to test
Thomas Schwinge
thomas@codesourcery.com
Wed Jun 29 09:19:00 GMT 2016
Hi!
Ping... Now waiting for review for two months.
Quoting my latest commentary from
<http://news.gmane.org/find-root.php?message_id=%3C87oa7br8ej.fsf%40hertz.schwinge.homeip.net%3E>:
| [...] there actually is a difference between offload_plugins and
| offload_targets (for example, "intelmic"
| vs. "x86_64-intelmicemul-linux-gnu"), and I'm using both variables --
| to avoid having to translate the more specific
| "x86_64-intelmicemul-linux-gnu" (which we required in the test harness)
| into the less specific "intelmic" (for plugin loading) in
| libgomp/target.c. I can do that, so that we can continue to use just a
| single offload_targets variable, but I consider that a less elegant
| solution.
Grüße
Thomas
On Wed, 25 May 2016 08:01:17 +0200, I wrote:
> Ping...
>
> On Wed, 18 May 2016 13:41:25 +0200, I wrote:
> > Ping.
> >
> > On Wed, 11 May 2016 15:45:13 +0200, I wrote:
> > > Ping.
> > >
> > > On Mon, 02 May 2016 11:54:27 +0200, I wrote:
> > > > On Fri, 29 Apr 2016 09:43:41 +0200, Jakub Jelinek <jakub@redhat.com> wrote:
> > > > > On Thu, Apr 28, 2016 at 12:43:43PM +0200, Thomas Schwinge wrote:
> > > > > > commit 3b521f3e35fdb4b320e95b5f6a82b8d89399481a
> > > > > > Author: Thomas Schwinge <thomas@codesourcery.com>
> > > > > > Date: Thu Apr 21 11:36:39 2016 +0200
> > > > > >
> > > > > > libgomp: Unconfuse offload plugins vs. offload targets
> > > > >
> > > > > I don't like this patch at all, rather than unconfusing stuff it
> > > > > makes stuff confusing. Plugins are just a way to support various
> > > > > offloading targets.
> > > >
> > > > Huh; my patch exactly clarifies that the offload_targets variable does
> > > > not actually list offload target names, but does list libgomp offload
> > > > plugin names...
> > > >
> > > > > Can you please post just a short patch without all those changes
> > > > > that does what you want, rather than renaming everything at the same time?
> > > >
> > > > I thought incremental, self-contained patches were easier to review.
> > > > Anyway, here's the three patches merged into one:
> > > >
> > > > commit 8060ae3474072eef685381d80f566d1c0942c603
> > > > Author: Thomas Schwinge <thomas@codesourcery.com>
> > > > Date: Thu Apr 21 11:36:39 2016 +0200
> > > >
> > > > libgomp: In OpenACC testing, cycle though $offload_targets, and by default only build for the offload target that we're actually going to test
> > > >
> > > > libgomp/
> > > > * plugin/configfrag.ac (offload_targets): Actually enumerate
> > > > offload targets, and add...
> > > > (offload_plugins): ... this one to enumerate offload plugins.
> > > > (OFFLOAD_PLUGINS): Renamed from OFFLOAD_TARGETS.
> > > > * target.c (gomp_target_init): Adjust to that.
> > > > * testsuite/lib/libgomp.exp: Likewise.
> > > > (offload_targets_s, offload_targets_s_openacc): Remove variables.
> > > > (offload_target_to_openacc_device_type): New proc.
> > > > (check_effective_target_openacc_nvidia_accel_selected)
> > > > (check_effective_target_openacc_host_selected): Examine
> > > > $openacc_device_type instead of $offload_target_openacc.
> > > > * Makefile.in: Regenerate.
> > > > * config.h.in: Likewise.
> > > > * configure: Likewise.
> > > > * testsuite/Makefile.in: Likewise.
> > > > * testsuite/libgomp.oacc-c++/c++.exp: Cycle through
> > > > $offload_targets (plus "disable") instead of
> > > > $offload_targets_s_openacc, and add "-foffload=$offload_target" to
> > > > tagopt.
> > > > * testsuite/libgomp.oacc-c/c.exp: Likewise.
> > > > * testsuite/libgomp.oacc-fortran/fortran.exp: Likewise.
> > > > ---
> > > > libgomp/Makefile.in | 1 +
> > > > libgomp/config.h.in | 4 +-
> > > > libgomp/configure | 44 +++++++------
> > > > libgomp/plugin/configfrag.ac | 39 +++++++-----
> > > > libgomp/target.c | 8 +--
> > > > libgomp/testsuite/Makefile.in | 1 +
> > > > libgomp/testsuite/lib/libgomp.exp | 72 ++++++++++------------
> > > > libgomp/testsuite/libgomp.oacc-c++/c++.exp | 30 +++++----
> > > > libgomp/testsuite/libgomp.oacc-c/c.exp | 30 +++++----
> > > > libgomp/testsuite/libgomp.oacc-fortran/fortran.exp | 22 ++++---
> > > > 10 files changed, 142 insertions(+), 109 deletions(-)
> > > >
> > > > diff --git libgomp/Makefile.in libgomp/Makefile.in
> > > > [snipped]
> > > > diff --git libgomp/config.h.in libgomp/config.h.in
> > > > [snipped]
> > > > diff --git libgomp/configure libgomp/configure
> > > > [snipped]
> > > > diff --git libgomp/plugin/configfrag.ac libgomp/plugin/configfrag.ac
> > > > index 88b4156..de0a6f6 100644
> > > > --- libgomp/plugin/configfrag.ac
> > > > +++ libgomp/plugin/configfrag.ac
> > > > @@ -26,8 +26,6 @@
> > > > # see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
> > > > # <http://www.gnu.org/licenses/>.
> > > >
> > > > -offload_targets=
> > > > -AC_SUBST(offload_targets)
> > > > plugin_support=yes
> > > > AC_CHECK_LIB(dl, dlsym, , [plugin_support=no])
> > > > if test x"$plugin_support" = xyes; then
> > > > @@ -142,7 +140,13 @@ AC_SUBST(PLUGIN_HSA_LIBS)
> > > >
> > > >
> > > >
> > > > -# Get offload targets and path to install tree of offloading compiler.
> > > > +# Parse offload targets, and figure out libgomp plugin, and configure the
> > > > +# corresponding offload compiler. offload_plugins and offload_targets will be
> > > > +# populated in the same order.
> > > > +offload_plugins=
> > > > +offload_targets=
> > > > +AC_SUBST(offload_plugins)
> > > > +AC_SUBST(offload_targets)
> > > > offload_additional_options=
> > > > offload_additional_lib_paths=
> > > > AC_SUBST(offload_additional_options)
> > > > @@ -151,13 +155,13 @@ if test x"$enable_offload_targets" != x; then
> > > > for tgt in `echo $enable_offload_targets | sed -e 's#,# #g'`; do
> > > > tgt_dir=`echo $tgt | grep '=' | sed 's/.*=//'`
> > > > tgt=`echo $tgt | sed 's/=.*//'`
> > > > - tgt_name=
> > > > + tgt_plugin=
> > > > case $tgt in
> > > > *-intelmic-* | *-intelmicemul-*)
> > > > - tgt_name=intelmic
> > > > + tgt_plugin=intelmic
> > > > ;;
> > > > nvptx*)
> > > > - tgt_name=nvptx
> > > > + tgt_plugin=nvptx
> > > > PLUGIN_NVPTX=$tgt
> > > > PLUGIN_NVPTX_CPPFLAGS=$CUDA_DRIVER_CPPFLAGS
> > > > PLUGIN_NVPTX_LDFLAGS=$CUDA_DRIVER_LDFLAGS
> > > > @@ -184,7 +188,7 @@ if test x"$enable_offload_targets" != x; then
> > > > ;;
> > > > esac
> > > > ;;
> > > > - hsa*)
> > > > + hsa)
> > > > case "${target}" in
> > > > x86_64-*-*)
> > > > case " ${CC} ${CFLAGS} " in
> > > > @@ -192,7 +196,7 @@ if test x"$enable_offload_targets" != x; then
> > > > PLUGIN_HSA=0
> > > > ;;
> > > > *)
> > > > - tgt_name=hsa
> > > > + tgt_plugin=hsa
> > > > PLUGIN_HSA=$tgt
> > > > PLUGIN_HSA_CPPFLAGS=$HSA_RUNTIME_CPPFLAGS
> > > > PLUGIN_HSA_LDFLAGS="$HSA_RUNTIME_LDFLAGS $HSA_KMT_LDFLAGS"
> > > > @@ -214,7 +218,7 @@ if test x"$enable_offload_targets" != x; then
> > > > LDFLAGS=$PLUGIN_HSA_save_LDFLAGS
> > > > LIBS=$PLUGIN_HSA_save_LIBS
> > > > case $PLUGIN_HSA in
> > > > - hsa*)
> > > > + hsa)
> > > > HSA_PLUGIN=0
> > > > AC_MSG_ERROR([HSA run-time package required for HSA support])
> > > > ;;
> > > > @@ -231,16 +235,19 @@ if test x"$enable_offload_targets" != x; then
> > > > AC_MSG_ERROR([unknown offload target specified])
> > > > ;;
> > > > esac
> > > > - if test x"$tgt_name" = x; then
> > > > + if test x"$tgt_plugin" = x; then
> > > > # Don't configure libgomp for this offloading target if we don't build
> > > > # the corresponding plugin.
> > > > continue
> > > > - elif test x"$offload_targets" = x; then
> > > > - offload_targets=$tgt_name
> > > > + elif test x"$offload_plugins" = x; then
> > > > + offload_plugins=$tgt_plugin
> > > > + offload_targets=$tgt
> > > > else
> > > > - offload_targets=$offload_targets,$tgt_name
> > > > + offload_plugins=$offload_plugins,$tgt_plugin
> > > > + offload_targets=$offload_targets,$tgt
> > > > fi
> > > > - if test "$tgt_name" = hsa; then
> > > > + # Configure additional search paths.
> > > > + if test "$tgt_plugin" = hsa; then
> > > > # Offloading compilation is all handled by the target compiler.
> > > > :
> > > > elif test x"$tgt_dir" != x; then
> > > > @@ -252,8 +259,8 @@ if test x"$enable_offload_targets" != x; then
> > > > fi
> > > > done
> > > > fi
> > > > -AC_DEFINE_UNQUOTED(OFFLOAD_TARGETS, "$offload_targets",
> > > > - [Define to offload targets, separated by commas.])
> > > > +AC_DEFINE_UNQUOTED(OFFLOAD_PLUGINS, "$offload_plugins",
> > > > + [Define to offload plugins, separated by commas.])
> > > > AM_CONDITIONAL([PLUGIN_NVPTX], [test $PLUGIN_NVPTX = 1])
> > > > AC_DEFINE_UNQUOTED([PLUGIN_NVPTX], [$PLUGIN_NVPTX],
> > > > [Define to 1 if the NVIDIA plugin is built, 0 if not.])
> > > > diff --git libgomp/target.c libgomp/target.c
> > > > index e2dd0e0..c12c085 100644
> > > > --- libgomp/target.c
> > > > +++ libgomp/target.c
> > > > @@ -2467,9 +2467,9 @@ gomp_target_fini (void)
> > > > }
> > > > }
> > > >
> > > > -/* This function initializes the runtime needed for offloading.
> > > > - It parses the list of offload targets and tries to load the plugins for
> > > > - these targets. On return, the variables NUM_DEVICES and NUM_DEVICES_OPENMP
> > > > +/* This function initializes the runtime for offloading.
> > > > + It parses the list of offload plugins, and tries to load these.
> > > > + On return, the variables NUM_DEVICES and NUM_DEVICES_OPENMP
> > > > will be set, and the array DEVICES initialized, containing descriptors for
> > > > corresponding devices, first the GOMP_OFFLOAD_CAP_OPENMP_400 ones, follows
> > > > by the others. */
> > > > @@ -2486,7 +2486,7 @@ gomp_target_init (void)
> > > > num_devices = 0;
> > > > devices = NULL;
> > > >
> > > > - cur = OFFLOAD_TARGETS;
> > > > + cur = OFFLOAD_PLUGINS;
> > > > if (*cur)
> > > > do
> > > > {
> > > > diff --git libgomp/testsuite/Makefile.in libgomp/testsuite/Makefile.in
> > > > [snipped]
> > > > diff --git libgomp/testsuite/lib/libgomp.exp libgomp/testsuite/lib/libgomp.exp
> > > > index 1cb4991..4a25421 100644
> > > > --- libgomp/testsuite/lib/libgomp.exp
> > > > +++ libgomp/testsuite/lib/libgomp.exp
> > > > @@ -36,28 +36,6 @@ load_gcc_lib fortran-modules.exp
> > > > # Try to load a test support file, built during libgomp configuration.
> > > > load_file libgomp-test-support.exp
> > > >
> > > > -# Populate offload_targets_s (offloading targets separated by a space), and
> > > > -# offload_targets_s_openacc (the same, but with OpenACC names; OpenACC spells
> > > > -# some of them a little differently).
> > > > -set offload_targets_s [split $offload_targets ","]
> > > > -set offload_targets_s_openacc {}
> > > > -foreach offload_target_openacc $offload_targets_s {
> > > > - # Translate to OpenACC names, or skip if not yet supported.
> > > > - switch $offload_target_openacc {
> > > > - intelmic {
> > > > - continue
> > > > - }
> > > > - nvptx {
> > > > - set offload_target_openacc "nvidia"
> > > > - }
> > > > - hsa {
> > > > - continue
> > > > - }
> > > > - }
> > > > - lappend offload_targets_s_openacc "$offload_target_openacc"
> > > > -}
> > > > -lappend offload_targets_s_openacc "host"
> > > > -
> > > > set dg-do-what-default run
> > > >
> > > > #
> > > > @@ -135,9 +113,9 @@ proc libgomp_init { args } {
> > > > set always_ld_library_path ".:${blddir}/.libs"
> > > >
> > > > # Add liboffloadmic build directory in LD_LIBRARY_PATH to support
> > > > - # non-fallback testing for Intel MIC targets
> > > > + # Intel MIC offloading testing.
> > > > global offload_targets
> > > > - if { [string match "*,intelmic,*" ",$offload_targets,"] } {
> > > > + if { [string match "*,*-intelmic*,*" ",$offload_targets,"] } {
> > > > append always_ld_library_path ":${blddir}/../liboffloadmic/.libs"
> > > > append always_ld_library_path ":${blddir}/../liboffloadmic/plugin/.libs"
> > > > # libstdc++ is required by liboffloadmic
> > > > @@ -245,8 +223,7 @@ proc libgomp_init { args } {
> > > > # Disable color diagnostics
> > > > lappend ALWAYS_CFLAGS "additional_flags=-fdiagnostics-color=never"
> > > >
> > > > - # Used for support non-fallback offloading.
> > > > - # Help GCC to find target mkoffload.
> > > > + # Help GCC to find offload compilers' mkoffload.
> > > > global offload_additional_options
> > > > if { $offload_additional_options != "" } {
> > > > lappend ALWAYS_CFLAGS "additional_flags=${offload_additional_options}"
> > > > @@ -322,6 +299,28 @@ proc libgomp_option_proc { option } {
> > > > }
> > > > }
> > > >
> > > > +# Translate offload target to OpenACC device type. Return the empty string if
> > > > +# not suitable or not yet supported, and "host" for offload target "disable".
> > > > +proc offload_target_to_openacc_device_type { offload_target } {
> > > > + switch -glob $offload_target {
> > > > + disable {
> > > > + return "host"
> > > > + }
> > > > + hsa {
> > > > + return ""
> > > > + }
> > > > + *-intelmic* {
> > > > + return ""
> > > > + }
> > > > + nvptx* {
> > > > + return "nvidia"
> > > > + }
> > > > + default {
> > > > + error "Unknwon offload target: $offload_target"
> > > > + }
> > > > + }
> > > > +}
> > > > +
> > > > # Return 1 if offload device is available.
> > > > proc check_effective_target_offload_device { } {
> > > > return [check_runtime_nocache offload_device_available_ {
> > > > @@ -373,29 +372,22 @@ proc check_effective_target_openacc_nvidia_accel_present { } {
> > > > } "" ]
> > > > }
> > > >
> > > > -# Return 1 if at least one nvidia board is present, and the nvidia device type
> > > > -# is selected by default by means of setting the environment variable
> > > > -# ACC_DEVICE_TYPE.
> > > > +# Return 1 if at least one nvidia board is present, and the OpenACC "nvidia"
> > > > +# device type is selected.
> > > >
> > > > proc check_effective_target_openacc_nvidia_accel_selected { } {
> > > > if { ![check_effective_target_openacc_nvidia_accel_present] } {
> > > > return 0;
> > > > }
> > > > - global offload_target_openacc
> > > > - if { $offload_target_openacc == "nvidia" } {
> > > > - return 1;
> > > > - }
> > > > - return 0;
> > > > + global openacc_device_type
> > > > + return [string match "nvidia" $openacc_device_type]
> > > > }
> > > >
> > > > -# Return 1 if the host target is selected for offloaded
> > > > +# Return 1 if the OpenACC "host" device type is selected.
> > > >
> > > > proc check_effective_target_openacc_host_selected { } {
> > > > - global offload_target_openacc
> > > > - if { $offload_target_openacc == "host" } {
> > > > - return 1;
> > > > - }
> > > > - return 0;
> > > > + global openacc_device_type
> > > > + return [string match "host" $openacc_device_type]
> > > > }
> > > >
> > > > # Return 1 if the selected OMP device is actually a HSA device
> > > > diff --git libgomp/testsuite/libgomp.oacc-c++/c++.exp libgomp/testsuite/libgomp.oacc-c++/c++.exp
> > > > index 608b298..befb921 100644
> > > > --- libgomp/testsuite/libgomp.oacc-c++/c++.exp
> > > > +++ libgomp/testsuite/libgomp.oacc-c++/c++.exp
> > > > @@ -70,18 +70,23 @@ if { $lang_test_file_found } {
> > > > set libstdcxx_includes ""
> > > > }
> > > >
> > > > - # Test OpenACC with available accelerators.
> > > > - foreach offload_target_openacc $offload_targets_s_openacc {
> > > > - set tagopt "-DACC_DEVICE_TYPE_$offload_target_openacc=1"
> > > > + # Test with all offload targets, and with offloading disabled.
> > > > + foreach offload_target [concat [split $offload_targets ","] "disable"] {
> > > > + set openacc_device_type [offload_target_to_openacc_device_type $offload_target]
> > > > + set tagopt "-DACC_DEVICE_TYPE_$openacc_device_type=1"
> > > >
> > > > - switch $offload_target_openacc {
> > > > - host {
> > > > + switch $openacc_device_type {
> > > > + "" {
> > > > + untested "$subdir $offload_target offloading"
> > > > + continue
> > > > + }
> > > > + "host" {
> > > > set acc_mem_shared 1
> > > > }
> > > > - nvidia {
> > > > + "nvidia" {
> > > > if { ![check_effective_target_openacc_nvidia_accel_present] } {
> > > > # Don't bother; execution testing is going to FAIL.
> > > > - untested "$subdir $offload_target_openacc offloading"
> > > > + untested "$subdir $offload_target offloading"
> > > > continue
> > > > }
> > > >
> > > > @@ -94,12 +99,15 @@ if { $lang_test_file_found } {
> > > > set acc_mem_shared 0
> > > > }
> > > > default {
> > > > - set acc_mem_shared 0
> > > > + error "Unknwon OpenACC device type: $openacc_device_type (offload target: $offload_target)"
> > > > }
> > > > }
> > > > set tagopt "$tagopt -DACC_MEM_SHARED=$acc_mem_shared"
> > > >
> > > > - setenv ACC_DEVICE_TYPE $offload_target_openacc
> > > > + # To avoid overhead, by default only build for the offload target that
> > > > + # we're actually going to test.
> > > > + set tagopt "$tagopt -foffload=$offload_target"
> > > > + setenv ACC_DEVICE_TYPE $openacc_device_type
> > > >
> > > > # To get better test coverage for device-specific code that is only
> > > > # ever used in offloading configurations, we'd like more thorough
> > > > @@ -108,8 +116,8 @@ if { $lang_test_file_found } {
> > > > # -O0 and -O2 only, to avoid testing times exploding too much, under
> > > > # the assumption that between -O0 and -O[something] there is the
> > > > # biggest difference in the overall structure of the generated code.
> > > > - switch $offload_target_openacc {
> > > > - host {
> > > > + switch $offload_target {
> > > > + "disable" {
> > > > set-torture-options [list \
> > > > { -O2 } ]
> > > > }
> > > > diff --git libgomp/testsuite/libgomp.oacc-c/c.exp libgomp/testsuite/libgomp.oacc-c/c.exp
> > > > index b509a10..5355b87 100644
> > > > --- libgomp/testsuite/libgomp.oacc-c/c.exp
> > > > +++ libgomp/testsuite/libgomp.oacc-c/c.exp
> > > > @@ -31,20 +31,25 @@ set ld_library_path $always_ld_library_path
> > > > append ld_library_path [gcc-set-multilib-library-path $GCC_UNDER_TEST]
> > > > set_ld_library_path_env_vars
> > > >
> > > > -# Test OpenACC with available accelerators.
> > > > +# Test with all offload targets, and with offloading disabled.
> > > > set SAVE_ALWAYS_CFLAGS "$ALWAYS_CFLAGS"
> > > > -foreach offload_target_openacc $offload_targets_s_openacc {
> > > > +foreach offload_target [concat [split $offload_targets ","] "disable"] {
> > > > set ALWAYS_CFLAGS "$SAVE_ALWAYS_CFLAGS"
> > > > - set tagopt "-DACC_DEVICE_TYPE_$offload_target_openacc=1"
> > > > + set openacc_device_type [offload_target_to_openacc_device_type $offload_target]
> > > > + set tagopt "-DACC_DEVICE_TYPE_$openacc_device_type=1"
> > > >
> > > > - switch $offload_target_openacc {
> > > > - host {
> > > > + switch $openacc_device_type {
> > > > + "" {
> > > > + untested "$subdir $offload_target offloading"
> > > > + continue
> > > > + }
> > > > + "host" {
> > > > set acc_mem_shared 1
> > > > }
> > > > - nvidia {
> > > > + "nvidia" {
> > > > if { ![check_effective_target_openacc_nvidia_accel_present] } {
> > > > # Don't bother; execution testing is going to FAIL.
> > > > - untested "$subdir $offload_target_openacc offloading"
> > > > + untested "$subdir $offload_target offloading"
> > > > continue
> > > > }
> > > >
> > > > @@ -57,12 +62,15 @@ foreach offload_target_openacc $offload_targets_s_openacc {
> > > > set acc_mem_shared 0
> > > > }
> > > > default {
> > > > - set acc_mem_shared 0
> > > > + error "Unknwon OpenACC device type: $openacc_device_type (offload target: $offload_target)"
> > > > }
> > > > }
> > > > set tagopt "$tagopt -DACC_MEM_SHARED=$acc_mem_shared"
> > > >
> > > > - setenv ACC_DEVICE_TYPE $offload_target_openacc
> > > > + # To avoid overhead, by default only build for the offload target that
> > > > + # we're actually going to test.
> > > > + set tagopt "$tagopt -foffload=$offload_target"
> > > > + setenv ACC_DEVICE_TYPE $openacc_device_type
> > > >
> > > > # To get better test coverage for device-specific code that is only
> > > > # ever used in offloading configurations, we'd like more thorough
> > > > @@ -71,8 +79,8 @@ foreach offload_target_openacc $offload_targets_s_openacc {
> > > > # -O0 and -O2 only, to avoid testing times exploding too much, under
> > > > # the assumption that between -O0 and -O[something] there is the
> > > > # biggest difference in the overall structure of the generated code.
> > > > - switch $offload_target_openacc {
> > > > - host {
> > > > + switch $offload_target {
> > > > + "disable" {
> > > > set-torture-options [list \
> > > > { -O2 } ]
> > > > }
> > > > diff --git libgomp/testsuite/libgomp.oacc-fortran/fortran.exp libgomp/testsuite/libgomp.oacc-fortran/fortran.exp
> > > > index 2d6b647..8507b67 100644
> > > > --- libgomp/testsuite/libgomp.oacc-fortran/fortran.exp
> > > > +++ libgomp/testsuite/libgomp.oacc-fortran/fortran.exp
> > > > @@ -65,30 +65,38 @@ if { $lang_test_file_found } {
> > > > append ld_library_path [gcc-set-multilib-library-path $GCC_UNDER_TEST]
> > > > set_ld_library_path_env_vars
> > > >
> > > > - # Test OpenACC with available accelerators.
> > > > - foreach offload_target_openacc $offload_targets_s_openacc {
> > > > - set tagopt "-DACC_DEVICE_TYPE_$offload_target_openacc=1"
> > > > + # Test with all offload targets, and with offloading disabled.
> > > > + foreach offload_target [concat [split $offload_targets ","] "disable"] {
> > > > + set openacc_device_type [offload_target_to_openacc_device_type $offload_target]
> > > > + set tagopt "-DACC_DEVICE_TYPE_$openacc_device_type=1"
> > > >
> > > > - switch $offload_target_openacc {
> > > > + switch $openacc_device_type {
> > > > + "" {
> > > > + untested "$subdir $offload_target offloading"
> > > > + continue
> > > > + }
> > > > host {
> > > > set acc_mem_shared 1
> > > > }
> > > > nvidia {
> > > > if { ![check_effective_target_openacc_nvidia_accel_present] } {
> > > > # Don't bother; execution testing is going to FAIL.
> > > > - untested "$subdir $offload_target_openacc offloading"
> > > > + untested "$subdir $offload_target offloading"
> > > > continue
> > > > }
> > > >
> > > > set acc_mem_shared 0
> > > > }
> > > > default {
> > > > - set acc_mem_shared 0
> > > > + error "Unknwon OpenACC device type: $openacc_device_type (offload target: $offload_target)"
> > > > }
> > > > }
> > > > set tagopt "$tagopt -DACC_MEM_SHARED=$acc_mem_shared"
> > > >
> > > > - setenv ACC_DEVICE_TYPE $offload_target_openacc
> > > > + # To avoid overhead, by default only build for the offload target that
> > > > + # we're actually going to test.
> > > > + set tagopt "$tagopt -foffload=$offload_target"
> > > > + setenv ACC_DEVICE_TYPE $openacc_device_type
> > > >
> > > > # For Fortran we're doing torture testing, as Fortran has far more tests
> > > > # with arrays etc. that testing just -O0 or -O2 is insufficient, that is
> >
> >
> > Grüße
> > Thomas
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