Makefile.in: Regenerate.
* Makefile.in: Regenerate. * Makefile.def (gcc host module) and soft dependency on lto-plugin and configure dependency on lto-plugin configure. (lto-plugin module): Remove dependency on GCC; add dependency on liniberty. * doc/invoke.texi: (-flto, -fuse-linker-plugin): Update defaults and no longer claim that gold is required for linker plugin. * configure: Regenerate. * gcc.c (PLUGIN_COND): New macro. (LINK_COMMAND_SPEC): Use it. (main): Default to plugin enabled with HAVE_LTO_PLUGIN is set. * config.in (HAVE_LTO_PLUGIN): New. * configure.ac (--with-lto-plugin): New parameter; autodetect HAVE_LTO_PLUGIN. From-SVN: r168593
This commit is contained in:
Jan Hubicka
Jan Hubicka
parent
f35cafc9ff
commit
96bdf9b403
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@ -1,3 +1,11 @@
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2011-01-07 Jan Hubicka <jh@suse.cz>
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* Makefile.in: Regenerate.
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* Makefile.def (gcc host module) and soft dependency on lto-plugin
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and configure dependency on lto-plugin configure.
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(lto-plugin module): Remove dependency on GCC; add dependency on
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liniberty.
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2011-01-07 William Schmidt <wschmidt@linux.vnet.ibm.com>
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* MAINTAINERS (Write After Approval): Add myself.
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@ -321,6 +321,7 @@ dependencies = { module=all-build-fixincludes; on=all-build-libiberty; };
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// Host modules specific to gcc.
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dependencies = { module=configure-gcc; on=configure-intl; };
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dependencies = { module=configure-gcc; on=configure-lto-plugin; };
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dependencies = { module=configure-gcc; on=all-binutils; };
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dependencies = { module=configure-gcc; on=all-gas; };
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dependencies = { module=configure-gcc; on=all-ld; };
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@ -344,6 +345,7 @@ dependencies = { module=all-gcc; on=all-libcpp; hard=true; };
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dependencies = { module=all-gcc; on=all-libdecnumber; hard=true; };
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dependencies = { module=all-gcc; on=all-libiberty; };
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dependencies = { module=all-gcc; on=all-fixincludes; };
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dependencies = { module=all-gcc; on=all-lto-plugin; };
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dependencies = { module=info-gcc; on=all-build-libiberty; };
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dependencies = { module=dvi-gcc; on=all-build-libiberty; };
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dependencies = { module=pdf-gcc; on=all-build-libiberty; };
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@ -360,7 +362,7 @@ dependencies = { module=all-fixincludes; on=all-libiberty; };
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dependencies = { module=all-gnattools; on=all-target-libada; };
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dependencies = { module=all-lto-plugin; on=all-gcc; };
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dependencies = { module=all-lto-plugin; on=all-libiberty; };
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dependencies = { module=configure-mpfr; on=all-gmp; };
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dependencies = { module=configure-mpc; on=all-mpfr; };
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30
Makefile.in
30
Makefile.in
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@ -60260,6 +60260,14 @@ configure-stage3-gcc: maybe-configure-stage3-intl
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configure-stage4-gcc: maybe-configure-stage4-intl
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configure-stageprofile-gcc: maybe-configure-stageprofile-intl
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configure-stagefeedback-gcc: maybe-configure-stagefeedback-intl
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configure-gcc: maybe-configure-lto-plugin
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configure-stage1-gcc: maybe-configure-stage1-lto-plugin
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configure-stage2-gcc: maybe-configure-stage2-lto-plugin
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configure-stage3-gcc: maybe-configure-stage3-lto-plugin
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configure-stage4-gcc: maybe-configure-stage4-lto-plugin
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configure-stageprofile-gcc: maybe-configure-stageprofile-lto-plugin
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configure-stagefeedback-gcc: maybe-configure-stagefeedback-lto-plugin
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configure-gcc: maybe-all-binutils
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configure-stage1-gcc: maybe-all-stage1-binutils
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@ -60437,6 +60445,14 @@ all-stage4-gcc: maybe-all-stage4-libiberty
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all-stageprofile-gcc: maybe-all-stageprofile-libiberty
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all-stagefeedback-gcc: maybe-all-stagefeedback-libiberty
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all-gcc: maybe-all-fixincludes
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all-gcc: maybe-all-lto-plugin
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all-stage1-gcc: maybe-all-stage1-lto-plugin
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all-stage2-gcc: maybe-all-stage2-lto-plugin
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all-stage3-gcc: maybe-all-stage3-lto-plugin
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all-stage4-gcc: maybe-all-stage4-lto-plugin
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all-stageprofile-gcc: maybe-all-stageprofile-lto-plugin
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all-stagefeedback-gcc: maybe-all-stagefeedback-lto-plugin
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info-gcc: maybe-all-build-libiberty
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info-stage1-gcc: maybe-all-build-libiberty
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@ -60505,14 +60521,14 @@ all-stageprofile-libcpp: maybe-all-stageprofile-intl
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all-stagefeedback-libcpp: maybe-all-stagefeedback-intl
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all-fixincludes: maybe-all-libiberty
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all-gnattools: maybe-all-target-libada
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all-lto-plugin: maybe-all-gcc
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all-lto-plugin: maybe-all-libiberty
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all-stage1-lto-plugin: maybe-all-stage1-gcc
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all-stage2-lto-plugin: maybe-all-stage2-gcc
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all-stage3-lto-plugin: maybe-all-stage3-gcc
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all-stage4-lto-plugin: maybe-all-stage4-gcc
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all-stageprofile-lto-plugin: maybe-all-stageprofile-gcc
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all-stagefeedback-lto-plugin: maybe-all-stagefeedback-gcc
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all-stage1-lto-plugin: maybe-all-stage1-libiberty
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all-stage2-lto-plugin: maybe-all-stage2-libiberty
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all-stage3-lto-plugin: maybe-all-stage3-libiberty
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all-stage4-lto-plugin: maybe-all-stage4-libiberty
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all-stageprofile-lto-plugin: maybe-all-stageprofile-libiberty
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all-stagefeedback-lto-plugin: maybe-all-stagefeedback-libiberty
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configure-mpfr: maybe-all-gmp
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configure-stage1-mpfr: maybe-all-stage1-gmp
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@ -1,3 +1,15 @@
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2011-01-07 Jan Hubicka <jh@suse.cz>
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* doc/invoke.texi: (-flto, -fuse-linker-plugin): Update defaults
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and no longer claim that gold is required for linker plugin.
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* configure: Regenerate.
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* gcc.c (PLUGIN_COND): New macro.
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(LINK_COMMAND_SPEC): Use it.
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(main): Default to plugin enabled with HAVE_LTO_PLUGIN is set.
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* config.in (HAVE_LTO_PLUGIN): New.
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* configure.ac (--with-lto-plugin): New parameter; autodetect
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HAVE_LTO_PLUGIN.
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2011-01-07 Jan Hubicka <jh@suse.cz>
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PR tree-optimization/46367
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@ -1142,6 +1142,10 @@
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#undef HAVE_LDFCN_H
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#endif
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/* Define if your linker supports plugin. */
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#ifndef USED_FOR_TARGET
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#undef HAVE_LTO_PLUGIN
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#endif
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/* Define if your linker supports --as-needed and --no-as-needed options. */
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#ifndef USED_FOR_TARGET
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@ -23093,6 +23093,29 @@ $as_echo "#define HAVE_LD_DEMANGLE 1" >>confdefs.h
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$as_echo "$gcc_cv_ld_demangle" >&6; }
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fi
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if test -f ../lto-plugin/Makefile ; then
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking linker plugin support" >&5
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$as_echo_n "checking linker plugin support... " >&6; }
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gcc_cv_lto_plugin=no
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if test $in_tree_ld = yes -a x"$ORIGINAL_PLUGIN_LD_FOR_TARGET=" = x"$gcc_cv_ld"; then
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if test x"$ld_is_gold" = xyes; then
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gcc_cv_lto_plugin=yes
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elif test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then \
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gcc_cv_lto_plugin=yes
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fi
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# Check if the linker supports --plugin-opt option
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elif $ORIGINAL_PLUGIN_LD_FOR_TARGET --help 2>/dev/null | grep plugin-opt > /dev/null; then
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gcc_cv_lto_plugin=yes
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fi
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if test x"$gcc_cv_lto_plugin" = xyes; then
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$as_echo "#define HAVE_LTO_PLUGIN 1" >>confdefs.h
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_lto_plugin" >&5
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$as_echo "$gcc_cv_lto_plugin" >&6; }
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fi
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case "$target" in
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# All TARGET_ABI_OSF targets.
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alpha*-*-osf* | alpha*-*-linux* | alpha*-*-*bsd*)
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@ -3149,6 +3149,26 @@ if test x"$demangler_in_ld" = xyes; then
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AC_MSG_RESULT($gcc_cv_ld_demangle)
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fi
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AC_MSG_CHECKING(linker plugin support)
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gcc_cv_lto_plugin=no
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if test -f ../lto-plugin/Makefile ; then
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if test $in_tree_ld = yes -a x"$ORIGINAL_PLUGIN_LD_FOR_TARGET=" = x"$gcc_cv_ld"; then
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if test x"$ld_is_gold" = xyes; then
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gcc_cv_lto_plugin=yes
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elif test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then \
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gcc_cv_lto_plugin=yes
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fi
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# Check if the linker supports --plugin-opt option
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elif $ORIGINAL_PLUGIN_LD_FOR_TARGET --help 2>/dev/null | grep plugin-opt > /dev/null; then
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gcc_cv_lto_plugin=yes
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fi
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fi
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if test x"$gcc_cv_lto_plugin" = xyes; then
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AC_DEFINE(HAVE_LTO_PLUGIN, 1,
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[Define if your linker supports plugin.])
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fi
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AC_MSG_RESULT($gcc_cv_lto_plugin)
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case "$target" in
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# All TARGET_ABI_OSF targets.
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alpha*-*-osf* | alpha*-*-linux* | alpha*-*-*bsd*)
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@ -7587,23 +7587,21 @@ types in separate translation units to be linked together (undefined
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behavior according to ISO C99 6.2.7), a non-fatal diagnostic may be
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issued. The behavior is still undefined at runtime.
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If object files containing GIMPLE bytecode are stored in a library
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archive, say @file{libfoo.a}, it is possible to extract and use them
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in an LTO link if you are using @command{gold} as the linker (which,
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in turn requires GCC to be configured with @option{--enable-gold}).
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To enable this feature, use the flag @option{-fuse-linker-plugin} at
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link-time:
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If object files containing GIMPLE bytecode are stored in a library archive, say
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@file{libfoo.a}, it is possible to extract and use them in an LTO link if you
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are using a linker with linker plugin support. To enable this feature, use
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the flag @option{-fuse-linker-plugin} at link-time:
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@smallexample
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gcc -o myprog -O2 -flto -fuse-linker-plugin a.o b.o -lfoo
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@end smallexample
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With the linker plugin enabled, @command{gold} will extract the needed
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With the linker plugin enabled, the linker will extract the needed
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GIMPLE files from @file{libfoo.a} and pass them on to the running GCC
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to make them part of the aggregated GIMPLE image to be optimized.
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If you are not using @command{gold} and/or do not specify
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@option{-fuse-linker-plugin} then the objects inside @file{libfoo.a}
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If you are not using a linker with linker plugin support and/or do not
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enable linker plugin then the objects inside @file{libfoo.a}
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will be extracted and linked as usual, but they will not participate
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in the LTO optimization process.
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@ -7667,13 +7665,20 @@ files in LTO mode (via @option{-flto}).
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Disabled by default.
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@item -fuse-linker-plugin
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Enables the extraction of objects with GIMPLE bytecode information
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from library archives. This option relies on features available only
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in @command{gold}, so to use this you must configure GCC with
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@option{--enable-gold}. See @option{-flto} for a description on the
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effect of this flag and how to use it.
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Enables the use of linker plugin during link time optimization. This option
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relies on the linker plugin support in linker that is available in @code{gold}
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or in GNU ld 2.21.51 or newer..
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Disabled by default.
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This option enables the extraction of object files with GIMPLE bytecode out of
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library archives. This improves the quality of optimization by exposing more
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code the the link time optimizer. This information specify what symbols
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can be accessed externally (by non-LTO object or during dynamic linking).
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Resulting code quality improvements on binaries (and shared libaries that do
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use hidden visibility) is similar to @code{-fwhole-program}. See
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@option{-flto} for a description on the effect of this flag and how to use it.
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Enabled by default when LTO support in GCC is enabled and GCC was compiled
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with linker supporting plugins (GNU ld or @code{gold}).
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@item -fcprop-registers
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@opindex fcprop-registers
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18
gcc/gcc.c
18
gcc/gcc.c
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@ -621,6 +621,13 @@ proper position among the other output files. */
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# endif
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#endif
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/* Conditional to test whether plugin is used or not. */
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#ifdef HAVE_LTO_PLUGIN
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#define PLUGIN_COND "!fno-use-linker-plugin"
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#else
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#define PLUGIN_COND "fuse-linker-plugin"
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#endif
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/* -u* was put back because both BSD and SysV seem to support it. */
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/* %{static:} simply prevents an error message if the target machine
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@ -634,7 +641,7 @@ proper position among the other output files. */
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#define LINK_COMMAND_SPEC "\
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%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
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%(linker) \
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%{fuse-linker-plugin: \
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%{"PLUGIN_COND": \
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-plugin %(linker_plugin_file) \
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-plugin-opt=%(lto_wrapper) \
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-plugin-opt=-fresolution=%u.res \
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@ -6779,7 +6786,11 @@ warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n"
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if (num_linker_inputs > 0 && !seen_error () && print_subprocess_help < 2)
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{
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int tmp = execution_count;
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#ifdef HAVE_LTO_PLUGIN
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const char *fno_use_linker_plugin = "fno-use-linker-plugin";
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#else
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const char *fuse_linker_plugin = "fuse-linker-plugin";
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#endif
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/* We'll use ld if we can't find collect2. */
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if (! strcmp (linker_name_spec, "collect2"))
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@ -6789,8 +6800,13 @@ warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n"
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linker_name_spec = "ld";
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}
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#ifdef HAVE_LTO_PLUGIN
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if (!switch_matches (fno_use_linker_plugin,
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fno_use_linker_plugin + strlen (fno_use_linker_plugin), 0))
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#else
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if (switch_matches (fuse_linker_plugin,
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fuse_linker_plugin + strlen (fuse_linker_plugin), 0))
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#endif
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{
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linker_plugin_file_spec = find_a_file (&exec_prefixes,
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LTOPLUGINSONAME, R_OK,
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