From: "H.J. Lu" <hjl.tools@gmail.com>
To: gcc-patches@gcc.gnu.org
Subject: [PATCH 2/2] Sync with binutils: Support the PGO build for binutils+gdb
Date: Sat, 13 Nov 2021 08:33:53 -0800 [thread overview]
Message-ID: <20211113163353.5374-3-hjl.tools@gmail.com> (raw)
In-Reply-To: <20211113163353.5374-1-hjl.tools@gmail.com>
Sync with binutils for building binutils with LTO:
From af019bfde9b13d628202fe58054ec7ff08d92a0f Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Sat, 9 Jan 2021 06:51:15 -0800
Subject: [PATCH] Support the PGO build for binutils+gdb
Add the --enable-pgo-build[=lto] configure option. When binutils+gdb
is not built together with GCC, --enable-pgo-build enables the PGO build:
1. First build with -fprofile-generate.
2. Use "make maybe-check-*" to generate profiling data and pass -i to make
to ignore errors when generating profiling data.
3. Use "make clean" to remove the previous build.
4. Rebuild with -fprofile-use.
With --enable-pgo-build=lto, -flto=jobserver -ffat-lto-objects are used
together with -fprofile-generate and -fprofile-use. Add '+' to the command
line for recursive make to support -flto=jobserver -ffat-lto-objects.
NB: --enable-pgo-build=lto enables the PGO build with LTO while
--enable-lto enables LTO support in toolchain.
PR binutils/26766
* Makefile.tpl (BUILD_CFLAGS): New.
(CFLAGS): Append $(BUILD_CFLAGS).
(CXXFLAGS): Likewise.
(PGO_BUILD_GEN_FLAGS_TO_PASS): New.
(PGO_BUILD_TRAINING_CFLAGS): Likewise.
(PGO_BUILD_TRAINING_CXXFLAGS): Likewise.
(PGO_BUILD_TRAINING_FLAGS_TO_PASS): Likewise.
(PGO_BUILD_TRAINING_MFLAGS): Likewise.
(PGO_BUILD_USE_FLAGS_TO_PASS): Likewise.
(PGO-TRAINING-TARGETS): Likewise.
(PGO_BUILD_TRAINING): Likewise.
(all): Add '+' to the command line for recursive make. Support
the PGO build.
* configure.ac: Add --enable-pgo-build[=lto].
AC_SUBST PGO_BUILD_GEN_CFLAGS, PGO_BUILD_USE_CFLAGS and
PGO_BUILD_LTO_CFLAGS. Enable the PGO build in Makefile.
* Makefile.in: Regenerated.
* configure: Likewise.
---
Makefile.in | 63 ++++++++++++++++++++++++++++++--
Makefile.tpl | 58 ++++++++++++++++++++++++++++--
configure | 100 +++++++++++++++++++++++++++++++++++++++++++++++++--
configure.ac | 65 +++++++++++++++++++++++++++++++++
4 files changed, 280 insertions(+), 6 deletions(-)
diff --git a/Makefile.in b/Makefile.in
index 13067e97327..2b77a470694 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -444,6 +444,49 @@ LIBCXXFLAGS = $(CXXFLAGS) -fno-implicit-templates
GOCFLAGS = $(CFLAGS)
GDCFLAGS = $(CFLAGS)
+# Pass additional PGO and LTO compiler options to the PGO build.
+BUILD_CFLAGS = $(PGO_BUILD_CFLAGS) $(PGO_BUILD_LTO_CFLAGS)
+override CFLAGS += $(BUILD_CFLAGS)
+override CXXFLAGS += $(BUILD_CFLAGS)
+
+# Additional PGO and LTO compiler options to generate profiling data
+# for the PGO build.
+PGO_BUILD_GEN_FLAGS_TO_PASS = \
+ PGO_BUILD_CFLAGS="@PGO_BUILD_GEN_CFLAGS@" \
+ PGO_BUILD_LTO_CFLAGS="@PGO_BUILD_LTO_CFLAGS@"
+
+# NB: Filter out any compiler options which may fail PGO training runs.
+PGO_BUILD_TRAINING_CFLAGS:= \
+ $(filter-out -Werror=%,$(CFLAGS))
+PGO_BUILD_TRAINING_CXXFLAGS:=\
+ $(filter-out -Werror=%,$(CXXFLAGS))
+PGO_BUILD_TRAINING_CFLAGS:= \
+ $(filter-out -Wall,$(PGO_BUILD_TRAINING_CFLAGS))
+PGO_BUILD_TRAINING_CXXFLAGS:= \
+ $(filter-out -Wall,$(PGO_BUILD_TRAINING_CXXFLAGS))
+PGO_BUILD_TRAINING_CFLAGS:= \
+ $(filter-out -specs=%,$(PGO_BUILD_TRAINING_CFLAGS))
+PGO_BUILD_TRAINING_CXXFLAGS:= \
+ $(filter-out -specs=%,$(PGO_BUILD_TRAINING_CXXFLAGS))
+PGO_BUILD_TRAINING_FLAGS_TO_PASS = \
+ PGO_BUILD_TRAINING=yes \
+ CFLAGS_FOR_TARGET="$(PGO_BUILD_TRAINING_CFLAGS)" \
+ CXXFLAGS_FOR_TARGET="$(PGO_BUILD_TRAINING_CXXFLAGS)"
+
+# Ignore "make check" errors in PGO training runs.
+PGO_BUILD_TRAINING_MFLAGS = -i
+
+# Additional PGO and LTO compiler options to use profiling data for the
+# PGO build.
+PGO_BUILD_USE_FLAGS_TO_PASS = \
+ PGO_BUILD_CFLAGS="@PGO_BUILD_USE_CFLAGS@" \
+ PGO_BUILD_LTO_CFLAGS="@PGO_BUILD_LTO_CFLAGS@"
+
+# PGO training targets for the PGO build. FIXME: Add gold tests to
+# training.
+PGO-TRAINING-TARGETS = binutils gas gdb ld sim
+PGO_BUILD_TRAINING = $(addprefix maybe-check-,$(PGO-TRAINING-TARGETS))
+
CREATE_GCOV = create_gcov
TFLAGS =
@@ -1091,6 +1134,12 @@ configure-target: \
# The target built for a native non-bootstrap build.
.PHONY: all
+
+# --enable-pgo-build enables the PGO build.
+# 1. First build with -fprofile-generate.
+# 2. Use "make maybe-check-*" to generate profiling data.
+# 3. Use "make clean" to remove the previous build.
+# 4. Rebuild with -fprofile-use.
all:
@if gcc-bootstrap
[ -f stage_final ] || echo stage3 > stage_final
@@ -1099,7 +1148,7 @@ all:
$(MAKE) $(RECURSE_FLAGS_TO_PASS) `cat stage_final`-bubble
@endif gcc-bootstrap
@: $(MAKE); $(unstage)
- @r=`${PWD_COMMAND}`; export r; \
+ +@r=`${PWD_COMMAND}`; export r; \
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; \
@if gcc-bootstrap
if [ -f stage_last ]; then \
@@ -1107,7 +1156,17 @@ all:
$(MAKE) $(TARGET_FLAGS_TO_PASS) all-host all-target; \
else \
@endif gcc-bootstrap
- $(MAKE) $(RECURSE_FLAGS_TO_PASS) all-host all-target \
+ $(MAKE) $(RECURSE_FLAGS_TO_PASS) \
+ $(PGO_BUILD_GEN_FLAGS_TO_PASS) all-host all-target \
+@if pgo-build
+ && $(MAKE) $(RECURSE_FLAGS_TO_PASS) \
+ $(PGO_BUILD_TRAINING_MFLAGS) \
+ $(PGO_BUILD_TRAINING_FLAGS_TO_PASS) \
+ $(PGO_BUILD_TRAINING) \
+ && $(MAKE) $(RECURSE_FLAGS_TO_PASS) clean \
+ && $(MAKE) $(RECURSE_FLAGS_TO_PASS) \
+ $(PGO_BUILD_USE_FLAGS_TO_PASS) all-host all-target \
+@endif pgo-build
@if gcc-bootstrap
; \
fi \
diff --git a/Makefile.tpl b/Makefile.tpl
index f785b84ec9c..c8732178344 100644
--- a/Makefile.tpl
+++ b/Makefile.tpl
@@ -447,6 +447,45 @@ LIBCXXFLAGS = $(CXXFLAGS) -fno-implicit-templates
GOCFLAGS = $(CFLAGS)
GDCFLAGS = $(CFLAGS)
+# Pass additional PGO and LTO compiler options to the PGO build.
+BUILD_CFLAGS = $(PGO_BUILD_CFLAGS) $(PGO_BUILD_LTO_CFLAGS)
+override CFLAGS += $(BUILD_CFLAGS)
+override CXXFLAGS += $(BUILD_CFLAGS)
+
+# Additional PGO and LTO compiler options to generate profiling data
+# for the PGO build.
+PGO_BUILD_GEN_FLAGS_TO_PASS = \
+ PGO_BUILD_CFLAGS="@PGO_BUILD_GEN_CFLAGS@" \
+ PGO_BUILD_LTO_CFLAGS="@PGO_BUILD_LTO_CFLAGS@"
+
+# NB: Filter out any compiler options which may fail PGO training runs.
+PGO_BUILD_TRAINING_CFLAGS:= \
+ $(filter-out -Werror=%,$(CFLAGS))
+PGO_BUILD_TRAINING_CXXFLAGS:=\
+ $(filter-out -Werror=%,$(CXXFLAGS))
+PGO_BUILD_TRAINING_CFLAGS:= \
+ $(filter-out -Wall,$(PGO_BUILD_TRAINING_CFLAGS))
+PGO_BUILD_TRAINING_CXXFLAGS:= \
+ $(filter-out -Wall,$(PGO_BUILD_TRAINING_CXXFLAGS))
+PGO_BUILD_TRAINING_CFLAGS:= \
+ $(filter-out -specs=%,$(PGO_BUILD_TRAINING_CFLAGS))
+PGO_BUILD_TRAINING_CXXFLAGS:= \
+ $(filter-out -specs=%,$(PGO_BUILD_TRAINING_CXXFLAGS))
+PGO_BUILD_TRAINING_FLAGS_TO_PASS = \
+ CFLAGS_FOR_TARGET="$(PGO_BUILD_TRAINING_CFLAGS)" \
+ CXXFLAGS_FOR_TARGET="$(PGO_BUILD_TRAINING_CXXFLAGS)"
+
+# Additional PGO and LTO compiler options to use profiling data for the
+# PGO build.
+PGO_BUILD_USE_FLAGS_TO_PASS = \
+ PGO_BUILD_CFLAGS="@PGO_BUILD_USE_CFLAGS@" \
+ PGO_BUILD_LTO_CFLAGS="@PGO_BUILD_LTO_CFLAGS@"
+
+# PGO training targets for the PGO build. FIXME: Add gold tests to
+# training.
+PGO-TRAINING-TARGETS = binutils gas gdb ld sim
+PGO_BUILD_TRAINING = $(addprefix maybe-check-,$(PGO-TRAINING-TARGETS))
+
CREATE_GCOV = create_gcov
TFLAGS =
@@ -776,6 +815,12 @@ configure-target: [+
# The target built for a native non-bootstrap build.
.PHONY: all
+
+# --enable-pgo-build enables the PGO build.
+# 1. First build with -fprofile-generate.
+# 2. Use "make maybe-check-*" to generate profiling data.
+# 3. Use "make clean" to remove the previous build.
+# 4. Rebuild with -fprofile-use.
all:
@if gcc-bootstrap
[ -f stage_final ] || echo stage3 > stage_final
@@ -784,7 +829,7 @@ all:
$(MAKE) $(RECURSE_FLAGS_TO_PASS) `cat stage_final`-bubble
@endif gcc-bootstrap
@: $(MAKE); $(unstage)
- @r=`${PWD_COMMAND}`; export r; \
+ +@r=`${PWD_COMMAND}`; export r; \
s=`cd $(srcdir); ${PWD_COMMAND}`; export s; \
@if gcc-bootstrap
if [ -f stage_last ]; then \
@@ -792,7 +837,16 @@ all:
$(MAKE) $(TARGET_FLAGS_TO_PASS) all-host all-target; \
else \
@endif gcc-bootstrap
- $(MAKE) $(RECURSE_FLAGS_TO_PASS) all-host all-target \
+ $(MAKE) $(RECURSE_FLAGS_TO_PASS) \
+ $(PGO_BUILD_GEN_FLAGS_TO_PASS) all-host all-target \
+@if pgo-build
+ && $(MAKE) $(RECURSE_FLAGS_TO_PASS) \
+ $(PGO_BUILD_TRAINING_FLAGS_TO_PASS) \
+ $(PGO_BUILD_TRAINING) \
+ && $(MAKE) $(RECURSE_FLAGS_TO_PASS) clean \
+ && $(MAKE) $(RECURSE_FLAGS_TO_PASS) \
+ $(PGO_BUILD_USE_FLAGS_TO_PASS) all-host all-target \
+@endif pgo-build
@if gcc-bootstrap
; \
fi \
diff --git a/configure b/configure
index ea3111a8020..bf0db18ec35 100755
--- a/configure
+++ b/configure
@@ -701,6 +701,9 @@ extra_mpc_gmp_configure_flags
extra_mpfr_configure_flags
gmpinc
gmplibs
+PGO_BUILD_LTO_CFLAGS
+PGO_BUILD_USE_CFLAGS
+PGO_BUILD_GEN_CFLAGS
HAVE_CXX11_FOR_BUILD
HAVE_CXX11
do_compare
@@ -804,6 +807,7 @@ enable_libssp
enable_libstdcxx
enable_liboffloadmic
enable_bootstrap
+enable_pgo_build
with_mpc
with_mpc_include
with_mpc_lib
@@ -1544,6 +1548,8 @@ Optional Features:
--enable-liboffloadmic=ARG
build liboffloadmic [ARG={no,host,target}]
--enable-bootstrap enable bootstrapping [yes if native build]
+ --enable-pgo-build[=lto]
+ enable the PGO build
--disable-isl-version-check
disable check for isl version
--enable-lto enable link time optimization support
@@ -7710,6 +7716,91 @@ $as_echo "#define HAVE_CXX11_FOR_BUILD 1" >>confdefs.h
fi
fi
+# Check whether --enable-pgo-build was given.
+if test "${enable_pgo_build+set}" = set; then :
+ enableval=$enable_pgo_build; enable_pgo_build=$enableval
+else
+ enable_pgo_build=no
+fi
+
+
+# Issue errors and warnings for invalid/strange PGO build combinations.
+case "$have_compiler:$host:$target:$enable_pgo_build" in
+ *:*:*:no) ;;
+
+ # Allow the PGO build only if we aren't building a compiler and
+ # we are in a native configuration.
+ no:$build:$build:yes | no:$build:$build:lto) ;;
+
+ # Disallow the PGO bootstrap if we are building a compiler.
+ yes:*:*:yes | yes:*:*:lto)
+ as_fn_error $? "cannot perform the PGO bootstrap when building a compiler" "$LINENO" 5 ;;
+
+ *)
+ as_fn_error $? "invalid option for --enable-pgo-build" "$LINENO" 5
+ ;;
+esac
+
+if test "$enable_pgo_build" != "no"; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports -fprofile-generate" >&5
+$as_echo_n "checking whether the compiler supports -fprofile-generate... " >&6; }
+ old_CFLAGS="$CFLAGS"
+ PGO_BUILD_GEN_CFLAGS="-fprofile-generate"
+ CFLAGS="$CFLAGS $PGO_BUILD_CFLAGS"
+
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+int foo;
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+else
+ PGO_BUILD_GEN_CFLAGS=
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ CFLAGS="$old_CFLAGS"
+ if test -n "$PGO_BUILD_GEN_CFLAGS"; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+ PGO_BUILD_USE_CFLAGS="-fprofile-use"
+ else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+ as_fn_error $? "cannot perform the PGO build without -fprofile-generate" "$LINENO" 5
+ fi
+
+ if test "$enable_pgo_build" = "lto"; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports -flto=jobserver -ffat-lto-objects" >&5
+$as_echo_n "checking whether the compiler supports -flto=jobserver -ffat-lto-objects... " >&6; }
+ old_CFLAGS="$CFLAGS"
+ PGO_BUILD_LTO_CFLAGS="-flto=jobserver -ffat-lto-objects"
+ CFLAGS="$CFLAGS $PGO_BUILD_LTO_CFLAGS"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+int foo;
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+else
+ PGO_BUILD_LTO_CFLAGS=
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ CFLAGS="$old_CFLAGS"
+ if test -n "$PGO_BUILD_LTO_CFLAGS"; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+ else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+ { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: LTO is disabled for the PGO build" >&5
+$as_echo "$as_me: WARNING: LTO is disabled for the PGO build" >&2;}
+ fi
+ fi
+fi
+
+
+
+
# Used for setting $lt_cv_objdir
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for objdir" >&5
$as_echo_n "checking for objdir... " >&6; }
@@ -7899,8 +7990,7 @@ if test -d ${srcdir}/gcc && test "x$have_gmp" = xno; then
# Check for the recommended and required versions of GMP.
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for the correct version of gmp.h" >&5
$as_echo_n "checking for the correct version of gmp.h... " >&6; }
-
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include "gmp.h"
int
@@ -9639,6 +9729,12 @@ extrasub_target="$extrasub_target
/^@unless /d
/^@endunless /d"
+if test "$enable_pgo_build" != "no"; then
+ extrasub_build="$extrasub_build
+/^@if pgo-build\$/d
+/^@endif pgo-build\$/d"
+fi
+
# Create the serialization dependencies. This uses a temporary file.
# Check whether --enable-serial-configure was given.
diff --git a/configure.ac b/configure.ac
index 1ca83d30a55..a2815f2218b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1465,6 +1465,65 @@ elif test "$have_compiler" = yes; then
fi
fi
+AC_ARG_ENABLE([pgo-build],
+[AS_HELP_STRING([--enable-pgo-build[[=lto]]],
+ [enable the PGO build])],
+[enable_pgo_build=$enableval],
+[enable_pgo_build=no])
+
+# Issue errors and warnings for invalid/strange PGO build combinations.
+case "$have_compiler:$host:$target:$enable_pgo_build" in
+ *:*:*:no) ;;
+
+ # Allow the PGO build only if we aren't building a compiler and
+ # we are in a native configuration.
+ no:$build:$build:yes | no:$build:$build:lto) ;;
+
+ # Disallow the PGO bootstrap if we are building a compiler.
+ yes:*:*:yes | yes:*:*:lto)
+ AC_MSG_ERROR([cannot perform the PGO bootstrap when building a compiler]) ;;
+
+ *)
+ AC_MSG_ERROR([invalid option for --enable-pgo-build])
+ ;;
+esac
+
+if test "$enable_pgo_build" != "no"; then
+ AC_MSG_CHECKING([whether the compiler supports -fprofile-generate])
+ old_CFLAGS="$CFLAGS"
+ PGO_BUILD_GEN_CFLAGS="-fprofile-generate"
+ CFLAGS="$CFLAGS $PGO_BUILD_CFLAGS"
+ AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
+ [PGO_BUILD_GEN_CFLAGS=])
+ CFLAGS="$old_CFLAGS"
+ if test -n "$PGO_BUILD_GEN_CFLAGS"; then
+ AC_MSG_RESULT([yes])
+ PGO_BUILD_USE_CFLAGS="-fprofile-use"
+ else
+ AC_MSG_RESULT([no])
+ AC_MSG_ERROR([cannot perform the PGO build without -fprofile-generate])
+ fi
+
+ if test "$enable_pgo_build" = "lto"; then
+ AC_MSG_CHECKING([whether the compiler supports -flto=jobserver -ffat-lto-objects])
+ old_CFLAGS="$CFLAGS"
+ PGO_BUILD_LTO_CFLAGS="-flto=jobserver -ffat-lto-objects"
+ CFLAGS="$CFLAGS $PGO_BUILD_LTO_CFLAGS"
+ AC_COMPILE_IFELSE([AC_LANG_SOURCE([int foo;])],,
+ [PGO_BUILD_LTO_CFLAGS=])
+ CFLAGS="$old_CFLAGS"
+ if test -n "$PGO_BUILD_LTO_CFLAGS"; then
+ AC_MSG_RESULT([yes])
+ else
+ AC_MSG_RESULT([no])
+ AC_MSG_WARN([LTO is disabled for the PGO build])
+ fi
+ fi
+fi
+AC_SUBST(PGO_BUILD_GEN_CFLAGS)
+AC_SUBST(PGO_BUILD_USE_CFLAGS)
+AC_SUBST(PGO_BUILD_LTO_CFLAGS)
+
# Used for setting $lt_cv_objdir
_LT_CHECK_OBJDIR
@@ -2957,6 +3016,12 @@ extrasub_target="$extrasub_target
/^@unless /d
/^@endunless /d"
+if test "$enable_pgo_build" != "no"; then
+ extrasub_build="$extrasub_build
+/^@if pgo-build\$/d
+/^@endif pgo-build\$/d"
+fi
+
# Create the serialization dependencies. This uses a temporary file.
AC_ARG_ENABLE([serial-configure],
--
2.33.1
next prev parent reply other threads:[~2021-11-13 16:33 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-13 16:33 [PATCH 0/2] Sync with binutils for building binutils with LTO: H.J. Lu
2021-11-13 16:33 ` [PATCH 1/2] Sync with binutils: GCC: Pass --plugin to AR and RANLIB H.J. Lu
2021-11-23 0:29 ` Jeff Law
2021-11-23 2:29 ` H.J. Lu
2021-12-14 23:30 ` Jeff Law
2021-12-15 0:29 ` H.J. Lu
2021-12-15 17:33 ` Jeff Law
2021-12-16 3:37 ` Sandra Loosemore
2021-12-16 4:28 ` H.J. Lu
2021-12-16 4:38 ` H.J. Lu
2021-12-16 5:34 ` Sandra Loosemore
2021-11-13 16:33 ` H.J. Lu [this message]
2021-12-15 20:25 ` [PATCH 2/2] Sync with binutils: Support the PGO build for binutils+gdb Jeff Law
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