+2009-08-12 Sriraman Tallam <tmsriram@google.com>
+
+ * icf.cc (Icf::find_identical_sections): Unfold symbols that have
+ been maked as --keep-unique.
+ (Icf::unfold_section): New function.
+ * icf.h (Icf::unfold_section): New function.
+ * options.h (General_options::keep_unique): New option.
+ * testsuite/Makefile.am: Add commands to build icf_keep_unique_test.
+ * testsuite/Makefile.in: Regenerate.
+ * testsuite/icf_keep_unique_test.sh: New file.
+ * testsuite/icf_keep_unique_test.cc: New file.
+
2009-08-12 Cary Coutant <ccoutant@google.com>
PR 10471
program_name, num_iterations);
}
+ // Unfold --keep-unique symbols.
+ for (options::String_set::const_iterator p =
+ parameters->options().keep_unique_begin();
+ p != parameters->options().keep_unique_end();
+ ++p)
+ {
+ const char* name = p->c_str();
+ Symbol* sym = symtab->lookup(name);
+ if (sym != NULL
+ && sym->source() == Symbol::FROM_OBJECT
+ && !sym->object()->is_dynamic())
+ {
+ Object* obj = sym->object();
+ bool is_ordinary;
+ unsigned int shndx = sym->shndx(&is_ordinary);
+ if (is_ordinary)
+ {
+ this->unfold_section(obj, shndx);
+ }
+ }
+
+ }
+
this->icf_ready();
}
+// Unfolds the section denoted by OBJ and SHNDX if folded.
+
+void
+Icf::unfold_section(Object* obj, unsigned int shndx)
+{
+ Section_id secn(obj, shndx);
+ Uniq_secn_id_map::iterator it = this->section_id_.find(secn);
+ if (it == this->section_id_.end())
+ return;
+ unsigned int section_num = it->second;
+ unsigned int kept_section_id = this->kept_section_id_[section_num];
+ if (kept_section_id != section_num)
+ this->kept_section_id_[section_num] = section_num;
+}
+
// This function determines if the section corresponding to the
// given object and index is folded based on if the kept section
// is different from this section.
is_icf_ready()
{ return this->icf_ready_; }
+ // Unfolds the section denoted by OBJ and SHNDX if folded.
+ void
+ unfold_section(Object* obj, unsigned int shndx);
+
// Returns the kept section corresponding to the
// given section.
bool
N_("Do not link against shared libraries"), NULL);
DEFINE_bool(icf, options::TWO_DASHES, '\0', false,
- N_("Fold identical functions"),
+ N_("Identical Code Folding (Fold identical functions)"),
N_("Don't fold identical functions (default)"));
DEFINE_uint(icf_iterations, options::TWO_DASHES , '\0', 0,
N_("List folded identical sections on stderr"),
N_("Do not list folded identical sections"));
+ DEFINE_set(keep_unique, options::TWO_DASHES, '\0',
+ N_("Do not fold this symbol during ICF"), N_("SYMBOL"));
+
DEFINE_bool(gc_sections, options::TWO_DASHES, '\0', false,
N_("Remove unused sections"),
N_("Don't remove unused sections (default)"));
icf_test.stdout: icf_test
$(TEST_NM) -C icf_test > icf_test.stdout
+check_SCRIPTS += icf_keep_unique_test.sh
+check_DATA += icf_keep_unique_test.stdout
+icf_keep_unique_test.o: icf_keep_unique_test.cc
+ $(CXXCOMPILE) -O0 -c -ffunction-sections -g -o $@ $<
+icf_keep_unique_test: icf_keep_unique_test.o gcctestdir/ld
+ $(CXXLINK) -Bgcctestdir/ -Wl,--icf -Wl,--keep-unique,_Z11unique_funcv icf_keep_unique_test.o
+icf_keep_unique_test.stdout: icf_keep_unique_test
+ $(TEST_NM) -C icf_keep_unique_test > icf_keep_unique_test.stdout
check_PROGRAMS += basic_test
check_PROGRAMS += basic_static_test
# and --dynamic-list-cpp-typeinfo
@GCC_TRUE@@NATIVE_LINKER_TRUE@am__append_1 = gc_comdat_test.sh \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ gc_tls_test.sh icf_test.sh \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@ icf_keep_unique_test.sh \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ two_file_shared.sh weak_plt.sh \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ debug_msg.sh undef_symbol.sh \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ ver_test_1.sh ver_test_2.sh \
@GCC_TRUE@@NATIVE_LINKER_TRUE@am__append_2 = gc_comdat_test.stdout \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ gc_tls_test.stdout \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ icf_test.stdout \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@ icf_keep_unique_test.stdout \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ two_file_shared.dbg \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ weak_plt_shared.so debug_msg.err \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ debug_msg_so.err \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ $(CXXLINK) -Bgcctestdir/ -Wl,--icf icf_test.o
@GCC_TRUE@@NATIVE_LINKER_TRUE@icf_test.stdout: icf_test
@GCC_TRUE@@NATIVE_LINKER_TRUE@ $(TEST_NM) -C icf_test > icf_test.stdout
+@GCC_TRUE@@NATIVE_LINKER_TRUE@icf_keep_unique_test.o: icf_keep_unique_test.cc
+@GCC_TRUE@@NATIVE_LINKER_TRUE@ $(CXXCOMPILE) -O0 -c -ffunction-sections -g -o $@ $<
+@GCC_TRUE@@NATIVE_LINKER_TRUE@icf_keep_unique_test: icf_keep_unique_test.o gcctestdir/ld
+@GCC_TRUE@@NATIVE_LINKER_TRUE@ $(CXXLINK) -Bgcctestdir/ -Wl,--icf -Wl,--keep-unique,_Z11unique_funcv icf_keep_unique_test.o
+@GCC_TRUE@@NATIVE_LINKER_TRUE@icf_keep_unique_test.stdout: icf_keep_unique_test
+@GCC_TRUE@@NATIVE_LINKER_TRUE@ $(TEST_NM) -C icf_keep_unique_test > icf_keep_unique_test.stdout
@GCC_TRUE@@NATIVE_LINKER_TRUE@basic_test.o: basic_test.cc
@GCC_TRUE@@NATIVE_LINKER_TRUE@ $(CXXCOMPILE) -O0 -c -o $@ $<
@GCC_TRUE@@NATIVE_LINKER_TRUE@basic_test: basic_test.o gcctestdir/ld
--- /dev/null
+// icf_keep_unique_test.cc -- a test case for gold
+
+// Copyright 2009 Free Software Foundation, Inc.
+// Written by Sriraman Tallam <tmsriram@google.com>.
+
+// This file is part of gold.
+
+// 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 this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+// The goal of this program is to verify if --keep-unique works
+// as intended when used with --icf.
+
+int kept_func()
+{
+ return 0;
+}
+
+int unique_func()
+{
+ return 0;
+}
+
+int main()
+{
+ return 1;
+}
--- /dev/null
+#!/bin/sh
+
+# icf_keep_unique_test.sh -- test --icf --keep-unique
+
+# Copyright 2009 Free Software Foundation, Inc.
+# Written by Sriraman Tallam <tmsriram@google.com>.
+
+# This file is part of gold.
+
+# 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 this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+# MA 02110-1301, USA.
+
+# The goal of this program is to verify if --keep-unique works
+# as intended when used with --icf.
+
+check()
+{
+ func_addr_1=`grep $2 $1 | awk '{print $1}'`
+ func_addr_2=`grep $3 $1 | awk '{print $1}'`
+ if [ $func_addr_1 = $func_addr_2 ]
+ then
+ echo "Identical Code Folding with keep-unique failed to unfold" $2
+ exit 1
+ fi
+}
+
+check icf_keep_unique_test.stdout "kept_func" "unique_func"
projects / external / binutils.git / commitdiff