Initial checkin of GCC 4.9.0 from trunk (r208799).

Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba

4 files changed, 233 insertions, 0 deletions

diff --git a/gcc-4.9/libitm/config/generic/asmcfi.h b/gcc-4.9/libitm/config/generic/asmcfi.h
new file mode 100644
index 000000000..999409ae9
--- /dev/null
+++ b/gcc-4.9/libitm/config/generic/asmcfi.h
@@ -0,0 +1,53 @@
+/* Copyright (C) 2011-2014 Free Software Foundation, Inc.
+   Contributed by Richard Henderson <rth@redhat.com>.
+
+   This file is part of the GNU Transactional Memory Library (libitm).
+
+   Libitm 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.
+
+   Libitm 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.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+
+#ifdef HAVE_AS_CFI_PSEUDO_OP
+
+#define cfi_startproc			.cfi_startproc
+#define cfi_endproc			.cfi_endproc
+#define cfi_adjust_cfa_offset(n)	.cfi_adjust_cfa_offset n
+#define cfi_def_cfa_offset(n)		.cfi_def_cfa_offset n
+#define cfi_def_cfa(r,n)		.cfi_def_cfa r, n
+#define cfi_rel_offset(r,o)		.cfi_rel_offset r, o
+#define cfi_register(o,n)		.cfi_register o, n
+#define cfi_offset(r,o)			.cfi_offset r, o
+#define cfi_restore(r)			.cfi_restore r
+#define cfi_undefined(r)		.cfi_undefined r
+
+#else
+
+#define cfi_startproc
+#define cfi_endproc
+#define cfi_adjust_cfa_offset(n)
+#define cfi_def_cfa_offset(n)
+#define cfi_def_cfa(r,n)
+#define cfi_rel_offset(r,o)
+#define cfi_register(o,n)
+#define cfi_offset(r,o)
+#define cfi_restore(r)
+#define cfi_undefined(r)
+
+#endif /* HAVE_AS_CFI_PSEUDO_OP */
diff --git a/gcc-4.9/libitm/config/generic/cacheline.h b/gcc-4.9/libitm/config/generic/cacheline.h
new file mode 100644
index 000000000..f46e2cd77
--- /dev/null
+++ b/gcc-4.9/libitm/config/generic/cacheline.h
@@ -0,0 +1,58 @@
+/* Copyright (C) 2009-2014 Free Software Foundation, Inc.
+   Contributed by Richard Henderson <rth@redhat.com>.
+
+   This file is part of the GNU Transactional Memory Library (libitm).
+
+   Libitm 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.
+
+   Libitm 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.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef LIBITM_CACHELINE_H
+#define LIBITM_CACHELINE_H 1
+
+namespace GTM HIDDEN {
+
+// A cacheline is the smallest unit with which locks are associated.
+// The current implementation of the _ITM_[RW] barriers assumes that
+// all data types can fit (aligned) within a cachline, which means
+// in practice sizeof(complex long double) is the smallest cacheline size.
+// It ought to be small enough for efficient manipulation of the
+// modification mask, below.
+#ifndef CACHELINE_SIZE
+# define CACHELINE_SIZE 32
+#endif
+
+// A gtm_cacheline_mask stores a modified bit for every modified byte
+// in the cacheline with which it is associated.
+typedef sized_integral<CACHELINE_SIZE / 8>::type gtm_cacheline_mask;
+
+union gtm_cacheline
+{
+  // Byte access to the cacheline.
+  unsigned char b[CACHELINE_SIZE] __attribute__((aligned(CACHELINE_SIZE)));
+
+  // Larger sized access to the cacheline.
+  uint16_t u16[CACHELINE_SIZE / sizeof(uint16_t)];
+  uint32_t u32[CACHELINE_SIZE / sizeof(uint32_t)];
+  uint64_t u64[CACHELINE_SIZE / sizeof(uint64_t)];
+  gtm_word w[CACHELINE_SIZE / sizeof(gtm_word)];
+};
+
+} // namespace GTM
+
+#endif // LIBITM_CACHELINE_H
diff --git a/gcc-4.9/libitm/config/generic/tls.cc b/gcc-4.9/libitm/config/generic/tls.cc
new file mode 100644
index 000000000..b83c244d1
--- /dev/null
+++ b/gcc-4.9/libitm/config/generic/tls.cc
@@ -0,0 +1,40 @@
+/* Copyright (C) 2010-2014 Free Software Foundation, Inc.
+   Contributed by Richard Henderson <rth@redhat.com>.
+
+   This file is part of the GNU Transactional Memory Library (libitm).
+
+   Libitm 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.
+
+   Libitm 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.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "libitm_i.h"
+
+namespace GTM HIDDEN {
+
+#if !defined(HAVE_ARCH_GTM_THREAD) || !defined(HAVE_ARCH_GTM_THREAD_DISP)
+__thread gtm_thread_tls _gtm_thr_tls;
+#endif
+
+// See tls.h for comments.
+void * __attribute__((noinline))
+mask_stack_bottom(gtm_thread *tx)
+{
+  return (uint8_t*)__builtin_dwarf_cfa() - 256;
+}
+
+} // namespace GTM
diff --git a/gcc-4.9/libitm/config/generic/tls.h b/gcc-4.9/libitm/config/generic/tls.h
new file mode 100644
index 000000000..1daa58094
--- /dev/null
+++ b/gcc-4.9/libitm/config/generic/tls.h
@@ -0,0 +1,82 @@
+/* Copyright (C) 2008-2014 Free Software Foundation, Inc.
+   Contributed by Richard Henderson <rth@redhat.com>.
+
+   This file is part of the GNU Transactional Memory Library (libitm).
+
+   Libitm 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.
+
+   Libitm 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.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef LIBITM_TLS_H
+#define LIBITM_TLS_H 1
+
+namespace GTM HIDDEN {
+
+#if !defined(HAVE_ARCH_GTM_THREAD) || !defined(HAVE_ARCH_GTM_THREAD_DISP)
+// Provides a single place to store all this libraries thread-local data.
+struct gtm_thread_tls
+{
+#ifndef HAVE_ARCH_GTM_THREAD
+  // The currently active transaction.  Elided if the target provides
+  // some efficient mechanism for storing this.
+  gtm_thread *thr;
+#endif
+#ifndef HAVE_ARCH_GTM_THREAD_DISP
+  // The dispatch table for the STM implementation currently in use.  Elided
+  // if the target provides some efficient mechanism for storing this.
+  abi_dispatch *disp;
+#endif
+};
+
+extern __thread gtm_thread_tls _gtm_thr_tls;
+#endif
+
+#ifndef HAVE_ARCH_GTM_THREAD
+// If the target does not provide optimized access to the thread-local
+// data, simply access the TLS variable defined above.
+static inline gtm_thread *gtm_thr() { return _gtm_thr_tls.thr; }
+static inline void set_gtm_thr(gtm_thread *x) { _gtm_thr_tls.thr = x; }
+#endif
+
+#ifndef HAVE_ARCH_GTM_THREAD_DISP
+// If the target does not provide optimized access to the currently
+// active dispatch table, simply access via GTM_THR.
+static inline abi_dispatch * abi_disp() { return _gtm_thr_tls.disp; }
+static inline void set_abi_disp(abi_dispatch *x) { _gtm_thr_tls.disp = x; }
+#endif
+
+#ifndef HAVE_ARCH_GTM_MASK_STACK
+// To filter out any updates that overlap the libitm stack, we define
+// gtm_mask_stack_top to the entry point to the library and
+// gtm_mask_stack_bottom to below the calling function (enforced with the
+// noinline attribute).  This definition should be fine for all
+// stack-grows-down architectures.
+// FIXME We fake the bottom to be lower so that we are safe even if we might
+// call further functions (compared to where we called gtm_mask_stack_bottom
+// in the call hierarchy) to actually undo or redo writes (e.g., memcpy).
+// This is a completely arbitrary value; can we instead ensure that there are
+// no such calls, or can we determine a future-proof value otherwise?
+static inline void *
+mask_stack_top(gtm_thread *tx) { return tx->jb.cfa; }
+void * __attribute__((noinline))
+mask_stack_bottom(gtm_thread *tx);
+#endif
+
+} // namespace GTM
+
+#endif // LIBITM_TLS_H