Initial checkin of GCC 4.9.0 from trunk (r208799).

Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba

1 files changed, 78 insertions, 0 deletions

diff --git a/gcc-4.9/gcc/tree-outof-ssa.h b/gcc-4.9/gcc/tree-outof-ssa.h
new file mode 100644
index 000000000..a8c319482
--- /dev/null
+++ b/gcc-4.9/gcc/tree-outof-ssa.h
@@ -0,0 +1,78 @@
+/* Routines for expanding from SSA form to RTL.
+   Copyright (C) 2009-2014 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC 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, or (at your option)
+any later version.
+
+GCC 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 GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+
+#ifndef GCC_TREE_OUTOF_SSA_H
+#define GCC_TREE_OUTOF_SSA_H
+
+
+/* This structure (of which only a singleton SA exists) is used to
+   pass around information between the outof-SSA functions, cfgexpand
+   and expand itself.  */
+struct ssaexpand
+{
+  /* The computed partitions of SSA names are stored here.  */
+  var_map map;
+
+  /* For an SSA name version V bit V is set iff TER decided that
+     its definition should be forwarded.  */
+  bitmap values;
+
+  /* For a partition number I partition_to_pseudo[I] contains the
+     RTL expression of the allocated space of it (either a MEM or
+     a pseudos REG).  */
+  rtx *partition_to_pseudo;
+
+  /* If partition I contains an SSA name that has a default def,
+     bit I will be set in this bitmap.  */
+  bitmap partition_has_default_def;
+};
+
+/* This is the singleton described above.  */
+extern struct ssaexpand SA;
+
+/* Returns the RTX expression representing the storage of the outof-SSA
+   partition that the SSA name EXP is a member of.  */
+static inline rtx
+get_rtx_for_ssa_name (tree exp)
+{
+  int p = partition_find (SA.map->var_partition, SSA_NAME_VERSION (exp));
+  if (SA.map->partition_to_view)
+    p = SA.map->partition_to_view[p];
+  gcc_assert (p != NO_PARTITION);
+  return SA.partition_to_pseudo[p];
+}
+
+/* If TER decided to forward the definition of SSA name EXP this function
+   returns the defining statement, otherwise NULL.  */
+static inline gimple
+get_gimple_for_ssa_name (tree exp)
+{
+  int v = SSA_NAME_VERSION (exp);
+  if (SA.values && bitmap_bit_p (SA.values, v))
+    return SSA_NAME_DEF_STMT (exp);
+  return NULL;
+}
+
+extern bool ssa_is_replaceable_p (gimple stmt);
+extern void finish_out_of_ssa (struct ssaexpand *sa);
+extern unsigned int rewrite_out_of_ssa (struct ssaexpand *sa);
+extern void expand_phi_nodes (struct ssaexpand *sa);
+
+#endif /* GCC_TREE_OUTOF_SSA_H */