arc: add patches for gcc from buildroot

5 files changed, 803 insertions, 0 deletions

diff --git a/toolchain/gcc/patches/arc-2015.12/100-libstdcxx-uclibc-c99.patch b/toolchain/gcc/patches/arc-2015.12/100-libstdcxx-uclibc-c99.patch
new file mode 100644
index 000000000..0d02ef0fb
--- /dev/null
+++ b/toolchain/gcc/patches/arc-2015.12/100-libstdcxx-uclibc-c99.patch
@@ -0,0 +1,273 @@
+Allow C99-depending features of libstdc++ with uClibc
+
+The libstdc++ code is fairly restrictive on how it checks for C99
+compatibility: it requires *complete* C99 support to enable certain
+features. For example, uClibc provides a good number of C99 features,
+but not C99 complex number support. For this reason, libstdc++
+completely disables many the standard C++ methods that can in fact
+work because uClibc provides the necessary functions.
+
+This patch is similar and highly inspired from
+https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58393, but implemented in
+a way that doesn't involve changing the configure.ac script, as
+autoreconfiguring gcc is complicated. It simply relies on the fact
+that uClibc defines the __UCLIBC__ definition.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+
+Index: b/libstdc++-v3/config/locale/generic/c_locale.h
+===================================================================
+--- a/libstdc++-v3/config/locale/generic/c_locale.h
++++ b/libstdc++-v3/config/locale/generic/c_locale.h
+@@ -70,7 +70,7 @@
+     __builtin_va_list __args;
+     __builtin_va_start(__args, __fmt);
+ 
+-#ifdef _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+     const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args);
+ #else
+     const int __ret = __builtin_vsprintf(__out, __fmt, __args);
+Index: b/libstdc++-v3/config/locale/gnu/c_locale.h
+===================================================================
+--- a/libstdc++-v3/config/locale/gnu/c_locale.h
++++ b/libstdc++-v3/config/locale/gnu/c_locale.h
+@@ -88,7 +88,7 @@
+     __builtin_va_list __args;
+     __builtin_va_start(__args, __fmt);
+ 
+-#ifdef _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+     const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args);
+ #else
+     const int __ret = __builtin_vsprintf(__out, __fmt, __args);
+Index: b/libstdc++-v3/include/bits/basic_string.h
+===================================================================
+--- a/libstdc++-v3/include/bits/basic_string.h
++++ b/libstdc++-v3/include/bits/basic_string.h
+@@ -2811,7 +2811,7 @@
+ _GLIBCXX_END_NAMESPACE_VERSION
+ } // namespace
+ 
+-#if ((__cplusplus >= 201103L) && defined(_GLIBCXX_USE_C99) \
++#if ((__cplusplus >= 201103L) && (defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)) \
+      && !defined(_GLIBCXX_HAVE_BROKEN_VSWPRINTF))
+ 
+ #include <ext/string_conversions.h>
+Index: b/libstdc++-v3/include/bits/locale_facets.tcc
+===================================================================
+--- a/libstdc++-v3/include/bits/locale_facets.tcc
++++ b/libstdc++-v3/include/bits/locale_facets.tcc
+@@ -987,7 +987,7 @@
+ 	char __fbuf[16];
+ 	__num_base::_S_format_float(__io, __fbuf, __mod);
+ 
+-#ifdef _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ 	// First try a buffer perhaps big enough (most probably sufficient
+ 	// for non-ios_base::fixed outputs)
+ 	int __cs_size = __max_digits * 3;
+Index: b/libstdc++-v3/include/bits/locale_facets_nonio.tcc
+===================================================================
+--- a/libstdc++-v3/include/bits/locale_facets_nonio.tcc
++++ b/libstdc++-v3/include/bits/locale_facets_nonio.tcc
+@@ -572,7 +572,7 @@
+     {
+       const locale __loc = __io.getloc();
+       const ctype<_CharT>& __ctype = use_facet<ctype<_CharT> >(__loc);
+-#ifdef _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+       // First try a buffer perhaps big enough.
+       int __cs_size = 64;
+       char* __cs = static_cast<char*>(__builtin_alloca(__cs_size));
+Index: b/libstdc++-v3/include/c_compatibility/math.h
+===================================================================
+--- a/libstdc++-v3/include/c_compatibility/math.h
++++ b/libstdc++-v3/include/c_compatibility/math.h
+@@ -56,7 +56,7 @@
+ using std::floor;
+ using std::fmod;
+ 
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ using std::fpclassify;
+ using std::isfinite;
+ using std::isinf;
+Index: b/libstdc++-v3/include/c_compatibility/wchar.h
+===================================================================
+--- a/libstdc++-v3/include/c_compatibility/wchar.h
++++ b/libstdc++-v3/include/c_compatibility/wchar.h
+@@ -103,7 +103,7 @@
+ using std::wmemset;
+ using std::wcsftime;
+ 
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ using std::wcstold;
+ using std::wcstoll;
+ using std::wcstoull;
+Index: b/libstdc++-v3/include/c_global/cstdlib
+===================================================================
+--- a/libstdc++-v3/include/c_global/cstdlib
++++ b/libstdc++-v3/include/c_global/cstdlib
+@@ -182,7 +182,7 @@
+ _GLIBCXX_END_NAMESPACE_VERSION
+ } // namespace
+ 
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ 
+ #undef _Exit
+ #undef llabs
+Index: b/libstdc++-v3/include/c_global/cwchar
+===================================================================
+--- a/libstdc++-v3/include/c_global/cwchar
++++ b/libstdc++-v3/include/c_global/cwchar
+@@ -232,7 +232,7 @@
+ _GLIBCXX_END_NAMESPACE_VERSION
+ } // namespace
+ 
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ 
+ #undef wcstold
+ #undef wcstoll
+@@ -289,7 +289,7 @@
+   using std::vwscanf;
+ #endif
+ 
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+   using std::wcstold;
+   using std::wcstoll;
+   using std::wcstoull;
+Index: b/libstdc++-v3/include/c_std/cstdio
+===================================================================
+--- a/libstdc++-v3/include/c_std/cstdio
++++ b/libstdc++-v3/include/c_std/cstdio
+@@ -139,7 +139,7 @@
+   using ::vsprintf;
+ } // namespace std
+ 
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ 
+ #undef snprintf
+ #undef vfscanf
+Index: b/libstdc++-v3/include/c_std/cstdlib
+===================================================================
+--- a/libstdc++-v3/include/c_std/cstdlib
++++ b/libstdc++-v3/include/c_std/cstdlib
+@@ -180,7 +180,7 @@
+ _GLIBCXX_END_NAMESPACE_VERSION
+ } // namespace
+ 
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ 
+ #undef _Exit
+ #undef llabs
+Index: b/libstdc++-v3/include/c_std/cwchar
+===================================================================
+--- a/libstdc++-v3/include/c_std/cwchar
++++ b/libstdc++-v3/include/c_std/cwchar
+@@ -228,7 +228,7 @@
+ _GLIBCXX_END_NAMESPACE_VERSION
+ } // namespace
+ 
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ 
+ #undef wcstold
+ #undef wcstoll
+Index: b/libstdc++-v3/include/ext/vstring.h
+===================================================================
+--- a/libstdc++-v3/include/ext/vstring.h
++++ b/libstdc++-v3/include/ext/vstring.h
+@@ -2571,7 +2571,7 @@
+ _GLIBCXX_END_NAMESPACE_VERSION
+ } // namespace
+ 
+-#if ((__cplusplus >= 201103L) && defined(_GLIBCXX_USE_C99))
++#if ((__cplusplus >= 201103L) && (defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)))
+ 
+ #include <ext/string_conversions.h>
+ 
+Index: b/libstdc++-v3/include/tr1/cstdio
+===================================================================
+--- a/libstdc++-v3/include/tr1/cstdio
++++ b/libstdc++-v3/include/tr1/cstdio
+@@ -33,7 +33,7 @@
+ 
+ #include <cstdio>
+ 
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ 
+ namespace std _GLIBCXX_VISIBILITY(default)
+ {
+Index: b/libstdc++-v3/include/tr1/cstdlib
+===================================================================
+--- a/libstdc++-v3/include/tr1/cstdlib
++++ b/libstdc++-v3/include/tr1/cstdlib
+@@ -35,7 +35,7 @@
+ 
+ #if _GLIBCXX_HOSTED
+ 
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ 
+ namespace std _GLIBCXX_VISIBILITY(default)
+ {
+Index: b/libstdc++-v3/include/tr1/cwchar
+===================================================================
+--- a/libstdc++-v3/include/tr1/cwchar
++++ b/libstdc++-v3/include/tr1/cwchar
+@@ -52,7 +52,7 @@
+   using std::vwscanf;
+ #endif
+ 
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+   using std::wcstold;
+   using std::wcstoll;
+   using std::wcstoull;
+Index: b/libstdc++-v3/include/tr1/stdlib.h
+===================================================================
+--- a/libstdc++-v3/include/tr1/stdlib.h
++++ b/libstdc++-v3/include/tr1/stdlib.h
+@@ -33,7 +33,7 @@
+ 
+ #if _GLIBCXX_HOSTED
+ 
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ 
+ using std::tr1::atoll;
+ using std::tr1::strtoll;
+Index: b/libstdc++-v3/src/c++11/debug.cc
+===================================================================
+--- a/libstdc++-v3/src/c++11/debug.cc
++++ b/libstdc++-v3/src/c++11/debug.cc
+@@ -787,7 +787,7 @@
+ 				     int __n __attribute__ ((__unused__)), 
+ 				     const char* __fmt, _Tp __s) const throw ()
+     {
+-#ifdef _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+       std::snprintf(__buf, __n, __fmt, __s);
+ #else
+       std::sprintf(__buf, __fmt, __s);
+Index: b/libstdc++-v3/include/c_global/cstdio
+===================================================================
+--- a/libstdc++-v3/include/c_global/cstdio
++++ b/libstdc++-v3/include/c_global/cstdio
+@@ -138,7 +138,7 @@
+   using ::vsprintf;
+ } // namespace
+ 
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ 
+ #undef snprintf
+ #undef vfscanf
diff --git a/toolchain/gcc/patches/arc-2015.12/851-PR-other-56780.patch b/toolchain/gcc/patches/arc-2015.12/851-PR-other-56780.patch
new file mode 100644
index 000000000..feb433920
--- /dev/null
+++ b/toolchain/gcc/patches/arc-2015.12/851-PR-other-56780.patch
@@ -0,0 +1,244 @@
+From afe990251bd9b3a063f03da31a3b8d139d033bc3 Mon Sep 17 00:00:00 2001
+From: ian <ian@138bc75d-0d04-0410-961f-82ee72b054a4>
+Date: Sat, 1 Jun 2013 00:20:49 +0000
+Subject: [PATCH] PR other/56780
+
+* libiberty/configure.ac: Move test for --enable-install-libiberty
+outside of the 'with_target_subdir' test so that it actually gets
+run.  Add output messages to show the test result.
+* libiberty/configure: Regenerate.
+* libiberty/Makefile.in (install_to_libdir): Place the
+installation of the libiberty library in the same guard as that
+used for the headers to prevent it being installed unless
+requested via --enable-install-libiberty.
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@199570 138bc75d-0d04-0410-961f-82ee72b054a4
+
+libiberty: fix --enable-install-libiberty flag [PR 56780]
+
+Commit 199570 fixed the --disable-install-libiberty behavior, but it also
+added a bug where the enable path never works because the initial clear
+of target_header_dir wasn't deleted.  So we end up initializing properly
+at the top only to reset it at the end all the time.
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@206367 138bc75d-0d04-0410-961f-82ee72b054a4
+
+[Romain
+  squash the two upstream commits
+  Remove the ChangeLog]
+Signed-off-by: Romain Naour <romain.naour@openwide.fr>
+---
+ libiberty/Makefile.in  | 24 ++++++++++-----------
+ libiberty/configure    | 57 +++++++++++++++++++++++++++-----------------------
+ libiberty/configure.ac | 47 ++++++++++++++++++++++-------------------
+ 3 files changed, 68 insertions(+), 60 deletions(-)
+
+diff --git a/libiberty/Makefile.in b/libiberty/Makefile.in
+index f6a3ebd..75ff82d 100644
+--- a/libiberty/Makefile.in
++++ b/libiberty/Makefile.in
+@@ -355,19 +355,19 @@ install-strip: install
+ # since it will be passed the multilib flags.
+ MULTIOSDIR = `$(CC) $(CFLAGS) -print-multi-os-directory`
+ install_to_libdir: all
+-	${mkinstalldirs} $(DESTDIR)$(libdir)/$(MULTIOSDIR)
+-	$(INSTALL_DATA) $(TARGETLIB) $(DESTDIR)$(libdir)/$(MULTIOSDIR)/$(TARGETLIB)n
+-	( cd $(DESTDIR)$(libdir)/$(MULTIOSDIR) ; chmod 644 $(TARGETLIB)n ;$(RANLIB) $(TARGETLIB)n )
+-	mv -f $(DESTDIR)$(libdir)/$(MULTIOSDIR)/$(TARGETLIB)n $(DESTDIR)$(libdir)/$(MULTIOSDIR)/$(TARGETLIB)
+ 	if test -n "${target_header_dir}"; then \
+-	  case "${target_header_dir}" in \
+-	    /*)    thd=${target_header_dir};; \
+-	    *)     thd=${includedir}/${target_header_dir};; \
+-	  esac; \
+-	  ${mkinstalldirs} $(DESTDIR)$${thd}; \
+-	  for h in ${INSTALLED_HEADERS}; do \
+-	    ${INSTALL_DATA} $$h $(DESTDIR)$${thd}; \
+-	  done; \
++		${mkinstalldirs} $(DESTDIR)$(libdir)/$(MULTIOSDIR); \
++		$(INSTALL_DATA) $(TARGETLIB) $(DESTDIR)$(libdir)/$(MULTIOSDIR)/$(TARGETLIB)n; \
++		( cd $(DESTDIR)$(libdir)/$(MULTIOSDIR) ; chmod 644 $(TARGETLIB)n ;$(RANLIB) $(TARGETLIB)n ); \
++		mv -f $(DESTDIR)$(libdir)/$(MULTIOSDIR)/$(TARGETLIB)n $(DESTDIR)$(libdir)/$(MULTIOSDIR)/$(TARGETLIB); \
++		case "${target_header_dir}" in \
++		  /*)    thd=${target_header_dir};; \
++		  *)     thd=${includedir}/${target_header_dir};; \
++		esac; \
++		${mkinstalldirs} $(DESTDIR)$${thd}; \
++		for h in ${INSTALLED_HEADERS}; do \
++		  ${INSTALL_DATA} $$h $(DESTDIR)$${thd}; \
++		done; \
+ 	fi
+ 	@$(MULTIDO) $(FLAGS_TO_PASS) multi-do DO=install
+ 
+diff --git a/libiberty/configure b/libiberty/configure
+index 5367027..4feb95a 100755
+--- a/libiberty/configure
++++ b/libiberty/configure
+@@ -675,8 +675,8 @@ with_cross_host
+ with_newlib
+ enable_maintainer_mode
+ enable_multilib
+-enable_largefile
+ enable_install_libiberty
++enable_largefile
+ '
+       ac_precious_vars='build_alias
+ host_alias
+@@ -1303,8 +1303,8 @@ Optional Features:
+                           enable make rules and dependencies not useful
+                           (and sometimes confusing) to the casual installer
+   --enable-multilib       build many library versions (default)
++  --enable-install-libiberty       Install headers and library for end users
+   --disable-largefile     omit support for large files
+-  --enable-install-libiberty       Install headers for end users
+ 
+ Optional Packages:
+   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
+@@ -2784,6 +2784,35 @@ if test $cross_compiling = no && test $multilib = yes \
+    cross_compiling=maybe
+ fi
+ 
++# We may wish to install the target headers somewhere.
++{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to install libiberty headers and static library" >&5
++$as_echo_n "checking whether to install libiberty headers and static library... " >&6; }
++
++# Check whether --enable-install-libiberty was given.
++if test "${enable_install_libiberty+set}" = set; then :
++  enableval=$enable_install_libiberty; enable_install_libiberty=$enableval
++else
++  enable_install_libiberty=no
++fi
++
++# Option parsed, now set things appropriately.
++case x"$enable_install_libiberty" in
++  xyes|x)
++    target_header_dir=libiberty
++    ;;
++  xno)
++    target_header_dir=
++    ;;
++  *)
++    # This could be sanity-checked in various ways...
++    target_header_dir="${enable_install_libiberty}"
++    ;;
++esac
++{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_install_libiberty" >&5
++$as_echo "$enable_install_libiberty" >&6; }
++{ $as_echo "$as_me:${as_lineno-$LINENO}: target_header_dir = $target_header_dir" >&5
++$as_echo "$as_me: target_header_dir = $target_header_dir" >&6;}
++
+ 
+ ac_ext=c
+ ac_cpp='$CPP $CPPFLAGS'
+@@ -5476,7 +5505,6 @@ fi
+ 
+ setobjs=
+ CHECK=
+-target_header_dir=
+ if test -n "${with_target_subdir}"; then
+ 
+   # We are being configured as a target library.  AC_REPLACE_FUNCS
+@@ -5759,29 +5787,6 @@ _ACEOF
+ 
+   esac
+ 
+-  # We may wish to install the target headers somewhere.
+-  # Check whether --enable-install-libiberty was given.
+-if test "${enable_install_libiberty+set}" = set; then :
+-  enableval=$enable_install_libiberty; enable_install_libiberty=$enableval
+-else
+-  enable_install_libiberty=no
+-fi
+-
+-  # Option parsed, now set things appropriately.
+-  case x"$enable_install_libiberty" in
+-    xyes|x)
+-      target_header_dir=libiberty
+-      ;;
+-    xno)
+-      target_header_dir=
+-      ;;
+-    *)
+-      # This could be sanity-checked in various ways...
+-      target_header_dir="${enable_install_libiberty}"
+-      ;;
+-  esac
+-
+-
+ else
+ 
+    # Not a target library, so we set things up to run the test suite.
+diff --git a/libiberty/configure.ac b/libiberty/configure.ac
+index c763894..f17e6b6 100644
+--- a/libiberty/configure.ac
++++ b/libiberty/configure.ac
+@@ -128,6 +128,31 @@ if test $cross_compiling = no && test $multilib = yes \
+    cross_compiling=maybe
+ fi
+ 
++# We may wish to install the target headers somewhere.
++AC_MSG_CHECKING([whether to install libiberty headers and static library])
++dnl install-libiberty is disabled by default
++
++AC_ARG_ENABLE(install-libiberty,
++[  --enable-install-libiberty       Install headers and library for end users],
++enable_install_libiberty=$enableval,
++enable_install_libiberty=no)dnl
++
++# Option parsed, now set things appropriately.
++case x"$enable_install_libiberty" in
++  xyes|x)
++    target_header_dir=libiberty
++    ;;
++  xno)   
++    target_header_dir=
++    ;;
++  *) 
++    # This could be sanity-checked in various ways...
++    target_header_dir="${enable_install_libiberty}"
++    ;;
++esac
++AC_MSG_RESULT($enable_install_libiberty)
++AC_MSG_NOTICE([target_header_dir = $target_header_dir])
++
+ GCC_NO_EXECUTABLES
+ AC_PROG_CC
+ AC_SYS_LARGEFILE
+@@ -380,7 +405,6 @@ fi
+ 
+ setobjs=
+ CHECK=
+-target_header_dir=
+ if test -n "${with_target_subdir}"; then
+ 
+   # We are being configured as a target library.  AC_REPLACE_FUNCS
+@@ -492,27 +516,6 @@ if test -n "${with_target_subdir}"; then
+ 
+   esac
+ 
+-  # We may wish to install the target headers somewhere.
+-  AC_ARG_ENABLE(install-libiberty,
+-  [  --enable-install-libiberty       Install headers for end users],
+-  enable_install_libiberty=$enableval,
+-  enable_install_libiberty=no)dnl
+-  
+-  # Option parsed, now set things appropriately.
+-  case x"$enable_install_libiberty" in
+-    xyes|x)
+-      target_header_dir=libiberty
+-      ;;
+-    xno)   
+-      target_header_dir=
+-      ;;
+-    *) 
+-      # This could be sanity-checked in various ways...
+-      target_header_dir="${enable_install_libiberty}"
+-      ;;
+-  esac
+-
+-
+ else
+ 
+    # Not a target library, so we set things up to run the test suite.
+-- 
+1.9.3
+
diff --git a/toolchain/gcc/patches/arc-2015.12/900-UPDATE-Fix-handling-complex-PIC-moves.patch b/toolchain/gcc/patches/arc-2015.12/900-UPDATE-Fix-handling-complex-PIC-moves.patch
new file mode 100644
index 000000000..48228dcb6
--- /dev/null
+++ b/toolchain/gcc/patches/arc-2015.12/900-UPDATE-Fix-handling-complex-PIC-moves.patch
@@ -0,0 +1,103 @@
+From b55922d45fd16f5e8fc7c3885da42b2b9b37754d Mon Sep 17 00:00:00 2001
+From: Claudiu Zissulescu <claziss@synopsys.com>
+Date: Mon, 18 Jan 2016 16:43:18 +0100
+Subject: [PATCH] UPDATE: Fix handling complex PIC moves.
+
+fwprop is putting in the REG_EQUIV notes which are involving the
+constant pic unspecs.  Then, loop may use those notes for
+optimizations rezulting in complex patterns that are not supported by
+the current implementation. The following piece of code tries to
+convert the complex instruction in simpler ones.
+
+The fix is done in development tree: [arc-4.8-dev b55922d] 
+and will be a part of the next release of ARC GNU tools.
+Once that new release happens this patch must be removed.
+
+
+gcc/
+2016-01-18  Claudiu Zissulescu  <claziss@synopsys.com>
+
+	* config/arc/arc.c (arc_legitimize_pic_address): Handle MINUS
+	operations when doing PIC moves. Make this function static.
+	(arc_legitimate_pc_offset_p): Use
+	arc_raw_symbolic_reference_mentioned_p.
+	* config/arc/arc-protos.h (arc_legitimize_pic_address): Remove.
+
+ gcc/config/arc/arc-protos.h |  1 -
+ gcc/config/arc/arc.c        | 33 +++++++++++++++++++--------------
+ 2 files changed, 19 insertions(+), 15 deletions(-)
+
+ 	* config/arc/arc.c (arc_legitimize_pic_address): Handle complex
+diff --git a/gcc/config/arc/arc-protos.h b/gcc/config/arc/arc-protos.h
+index 464e0ab..5986e06 100644
+--- a/gcc/config/arc/arc-protos.h
++++ b/gcc/config/arc/arc-protos.h
+@@ -53,7 +53,6 @@ extern unsigned int arc_compute_frame_size ();
+ extern bool arc_ccfsm_branch_deleted_p (void);
+ extern void arc_ccfsm_record_branch_deleted (void);
+ 
+-extern rtx arc_legitimize_pic_address (rtx, rtx);
+ void arc_asm_output_aligned_decl_local (FILE *, tree, const char *,
+ 					unsigned HOST_WIDE_INT,
+ 					unsigned HOST_WIDE_INT,
+diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c
+index a89c8ee..f7cae9f 100644
+--- a/gcc/config/arc/arc.c
++++ b/gcc/config/arc/arc.c
+@@ -5243,19 +5243,7 @@ arc_legitimate_pc_offset_p (rtx addr)
+   if (GET_CODE (addr) != CONST)
+     return false;
+   addr = XEXP (addr, 0);
+-  if (GET_CODE (addr) == PLUS)
+-    {
+-      if (GET_CODE (XEXP (addr, 1)) != CONST_INT)
+-	return false;
+-      addr = XEXP (addr, 0);
+-    }
+-  return (GET_CODE (addr) == UNSPEC
+-	  && XVECLEN (addr, 0) == 1
+-	  && (XINT (addr, 1) == ARC_UNSPEC_GOT
+-	      || XINT (addr, 1) == ARC_UNSPEC_GOTOFFPC
+-	      || XINT (addr, 1) == UNSPEC_TLS_GD
+-	      || XINT (addr, 1) == UNSPEC_TLS_IE)
+-	  && GET_CODE (XVECEXP (addr, 0, 0)) == SYMBOL_REF);
++  return flag_pic && !arc_raw_symbolic_reference_mentioned_p (addr, false);
+ }
+ 
+ /* Return true if ADDR is a valid pic address.
+@@ -5522,7 +5510,7 @@ arc_legitimize_tls_address (rtx addr, enum tls_model model)
+    The return value is the legitimated address.
+    If OLDX is non-zero, it is the target to assign the address to first.  */
+ 
+-rtx
++static rtx
+ arc_legitimize_pic_address (rtx orig, rtx oldx)
+ {
+   rtx addr = orig;
+@@ -5569,6 +5557,23 @@ arc_legitimize_pic_address (rtx orig, rtx oldx)
+ 	      /* Check that the unspec is one of the ones we generate?  */
+ 	      return orig;
+ 	    }
++	  else if (GET_CODE (addr) == MINUS)
++	    {
++	      /* The same story with fwprop.  */
++	      rtx op0 = XEXP (addr, 0);
++	      rtx op1 = XEXP (addr, 1);
++	      gcc_assert (oldx);
++	      gcc_assert (GET_CODE (op1) == UNSPEC);
++
++	      emit_move_insn (oldx,
++			      gen_rtx_CONST (SImode,
++					     arc_legitimize_pic_address (op1,
++									 NULL_RTX)));
++	      emit_insn (gen_rtx_SET (VOIDmode, oldx,
++				      gen_rtx_MINUS (SImode, op0, oldx)));
++	      return oldx;
++
++	    }
+ 	  else if (GET_CODE (addr) != PLUS)
+ 	    {
+ 	      /* fwprop is putting in the REG_EQUIV notes which are
+-- 
+2.5.0
+
diff --git a/toolchain/gcc/patches/arc-2015.12/901-UPDATE1-Fix-handling-complex-PIC-moves.patch b/toolchain/gcc/patches/arc-2015.12/901-UPDATE1-Fix-handling-complex-PIC-moves.patch
new file mode 100644
index 000000000..28cb7c191
--- /dev/null
+++ b/toolchain/gcc/patches/arc-2015.12/901-UPDATE1-Fix-handling-complex-PIC-moves.patch
@@ -0,0 +1,83 @@
+From f00b0f17d6889d811468c2c77508fbea8bfc377d Mon Sep 17 00:00:00 2001
+From: Claudiu Zissulescu <claziss@synopsys.com>
+Date: Tue, 19 Jan 2016 14:40:16 +0100
+Subject: [PATCH] UPDATE1: Fix handling complex PIC moves.
+
+The arc_legitimate_pc_offset_p condition is too lax. Updated it.
+
+The fix is done in development tree: [arc-4.8-dev f00b0f1] 
+and will be a part of the next release of ARC GNU tools.
+Once that new release happens this patch must be removed.
+
+gcc/
+2016-01-18  Claudiu Zissulescu  <claziss@synopsys.com>
+
+	* config/arc/arc.c (arc_needs_pcl_p ): New function
+	(arc_legitimate_pc_offset_p): Use arc_needs_pcl_p.
+---
+ gcc/config/arc/arc.c | 42 ++++++++++++++++++++++++++++++++++++++++--
+ 1 file changed, 40 insertions(+), 2 deletions(-)
+
+diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c
+index f7cae9f..18d88a3 100644
+--- a/gcc/config/arc/arc.c
++++ b/gcc/config/arc/arc.c
+@@ -5234,6 +5234,45 @@ arc_rtx_costs (rtx x, int code, int outer_code, int opno ATTRIBUTE_UNUSED,
+     }
+ }
+ 
++/* Helper used by arc_legitimate_pc_offset_p.  */
++
++static bool
++arc_needs_pcl_p (rtx x)
++{
++  register const char *fmt;
++  register int i, j;
++
++  if ((GET_CODE (x) == UNSPEC)
++      && (XVECLEN (x, 0) == 1)
++      && (GET_CODE (XVECEXP (x, 0, 0)) == SYMBOL_REF))
++    switch (XINT (x, 1))
++      {
++      case ARC_UNSPEC_GOT:
++      case ARC_UNSPEC_GOTOFFPC:
++      case UNSPEC_TLS_GD:
++      case UNSPEC_TLS_IE:
++	return true;
++      default:
++	break;
++      }
++
++  fmt = GET_RTX_FORMAT (GET_CODE (x));
++  for (i = GET_RTX_LENGTH (GET_CODE (x)) - 1; i >= 0; i--)
++    {
++      if (fmt[i] == 'e')
++	{
++	  if (arc_needs_pcl_p (XEXP (x, i)))
++	    return true;
++	}
++      else if (fmt[i] == 'E')
++	for (j = XVECLEN (x, i) - 1; j >= 0; j--)
++	  if (arc_needs_pcl_p (XVECEXP (x, i, j)))
++	    return true;
++    }
++
++  return false;
++}
++
+ /* Return true if ADDR is an address that needs to be expressed as an
+    explicit sum of pcl + offset.  */
+ 
+@@ -5242,8 +5281,7 @@ arc_legitimate_pc_offset_p (rtx addr)
+ {
+   if (GET_CODE (addr) != CONST)
+     return false;
+-  addr = XEXP (addr, 0);
+-  return flag_pic && !arc_raw_symbolic_reference_mentioned_p (addr, false);
++  return arc_needs_pcl_p (addr);
+ }
+ 
+ /* Return true if ADDR is a valid pic address.
+-- 
+2.5.0
+
diff --git a/toolchain/gcc/patches/arc-2015.12/950-Don-t-allow-mcompact-casesi-for-ARCv2.patch b/toolchain/gcc/patches/arc-2015.12/950-Don-t-allow-mcompact-casesi-for-ARCv2.patch
new file mode 100644
index 000000000..dc03a028e
--- /dev/null
+++ b/toolchain/gcc/patches/arc-2015.12/950-Don-t-allow-mcompact-casesi-for-ARCv2.patch
@@ -0,0 +1,100 @@
+From 09463827001a7b8094f4b9460514370a1876d908 Mon Sep 17 00:00:00 2001
+From: Claudiu Zissulescu <claziss@synopsys.com>
+Date: Wed, 20 Jan 2016 16:32:40 +0100
+Subject: [PATCH] Don't allow mcompact-casesi for ARCv2
+
+The compact casesi is not working for arcv2 processors family as it
+makes use of the add_s rx,rx,pcl instruction which is only valid for
+arc6xx and arc700 processors. Also not having this instruction makes
+no much sens to change the compact-casesi pattern to use normal add
+instructions as it nullifies the advantage of short instruction use.
+The default casesi pattern betters suits the arcv2 architecture.
+
+The fix is done in development tree: [arc-4.8-dev 0946382] 
+and will be a part of the next release of ARC GNU tools.
+Once that new release happens this patch must be removed.
+
+gcc/
+2016-01-20  Claudiu Zissulescu  <claziss@synopsys.com>
+
+	* common/config/arc/arc-common.c (arc_option_optimization_table):
+	Remove mcompact-casesi option.
+	* config/arc/arc.c (arc_override_options): Use compact-casesi only
+	for arcv1.
+	* config/arc/arc.md (casesi_load): Use short instructions.
+---
+ gcc/common/config/arc/arc-common.c |  1 -
+ gcc/config/arc/arc.c               |  9 +++++----
+ gcc/config/arc/arc.md              | 10 ++++++++--
+ 3 files changed, 13 insertions(+), 7 deletions(-)
+ 
+ 	* config/arc/arc.c (arc_legitimize_pic_address): Handle MINUS
+diff --git a/gcc/common/config/arc/arc-common.c b/gcc/common/config/arc/arc-common.c
+index e2e36fa..310bc80 100644
+--- a/gcc/common/config/arc/arc-common.c
++++ b/gcc/common/config/arc/arc-common.c
+@@ -58,7 +58,6 @@ static const struct default_options arc_option_optimization_table[] =
+     { OPT_LEVELS_ALL, OPT_mbbit_peephole, NULL, 1 },
+     { OPT_LEVELS_SIZE, OPT_mq_class, NULL, 1 },
+     { OPT_LEVELS_SIZE, OPT_mcase_vector_pcrel, NULL, 1 },
+-    { OPT_LEVELS_SIZE, OPT_mcompact_casesi, NULL, 1 },
+     { OPT_LEVELS_NONE, 0, NULL, 0 }
+   };
+ 
+diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c
+index 18d88a3..f828398 100644
+--- a/gcc/config/arc/arc.c
++++ b/gcc/config/arc/arc.c
+@@ -1151,6 +1151,11 @@ arc_override_options (void)
+   if (arc_size_opt_level == 3)
+     optimize_size = 1;
+ 
++  if (TARGET_V2)
++    TARGET_COMPACT_CASESI = 0;
++  else if (optimize_size == 1)
++    TARGET_COMPACT_CASESI = 1;
++
+   if (flag_pic)
+     target_flags |= MASK_NO_SDATA_SET;
+ 
+@@ -1163,10 +1168,6 @@ arc_override_options (void)
+   if (!TARGET_Q_CLASS)
+     TARGET_COMPACT_CASESI = 0;
+ 
+-  /* For the time being don't support COMPACT_CASESI for ARCv2. */
+-  if (TARGET_V2)
+-    TARGET_COMPACT_CASESI = 0;
+-
+   if (TARGET_COMPACT_CASESI)
+     TARGET_CASE_VECTOR_PC_RELATIVE = 1;
+ 
+diff --git a/gcc/config/arc/arc.md b/gcc/config/arc/arc.md
+index bc4ac38..ba7c8bc 100644
+--- a/gcc/config/arc/arc.md
++++ b/gcc/config/arc/arc.md
+@@ -3837,14 +3837,20 @@
+   switch (GET_MODE (diff_vec))
+     {
+     case SImode:
+-      return \"ld.as %0,[%1,%2]%&\";
++      if ((which_alternative == 0) && TARGET_CODE_DENSITY)
++       return \"ld_s.as %0,[%1,%2]%&\";
++      else
++       return \"ld.as %0,[%1,%2]%&\";
+     case HImode:
+       if (ADDR_DIFF_VEC_FLAGS (diff_vec).offset_unsigned)
+ 	return \"ldw.as %0,[%1,%2]\";
+       return \"ldw.x.as %0,[%1,%2]\";
+     case QImode:
+       if (ADDR_DIFF_VEC_FLAGS (diff_vec).offset_unsigned)
+-	return \"ldb%? %0,[%1,%2]%&\";
++        if (which_alternative == 0)
++	 return \"ldb_s %0,[%1,%2]%&\";
++        else
++	 return \"ldb %0,[%1,%2]%&\";
+       return \"ldb.x %0,[%1,%2]\";
+     default:
+       gcc_unreachable ();
+-- 
+2.5.0
+