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authorBen Cheng <bccheng@google.com>2014-03-26 05:37:19 (GMT)
committerBen Cheng <bccheng@google.com>2014-03-26 05:37:19 (GMT)
commit1bc5aee63eb72b341f506ad058502cd0361f0d10 (patch)
treec607e8252f3405424ff15bc2d00aa38dadbb2518 /gcc-4.9/gcc/tree-ssanames.h
parent283a0bf58fcf333c58a2a92c3ebbc41fb9eb1fdb (diff)
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Initial checkin of GCC 4.9.0 from trunk (r208799).
Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba
Diffstat (limited to 'gcc-4.9/gcc/tree-ssanames.h')
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+/* SSA name expresssons routines
+ Copyright (C) 2013-2014 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_SSANAMES_H
+#define GCC_TREE_SSANAMES_H
+
+/* Aliasing information for SSA_NAMEs representing pointer variables. */
+
+struct GTY(()) ptr_info_def
+{
+ /* The points-to solution. */
+ struct pt_solution pt;
+
+ /* Alignment and misalignment of the pointer in bytes. Together
+ align and misalign specify low known bits of the pointer.
+ ptr & (align - 1) == misalign. */
+
+ /* When known, this is the power-of-two byte alignment of the object this
+ pointer points into. This is usually DECL_ALIGN_UNIT for decls and
+ MALLOC_ABI_ALIGNMENT for allocated storage. When the alignment is not
+ known, it is zero. Do not access directly but use functions
+ get_ptr_info_alignment, set_ptr_info_alignment,
+ mark_ptr_info_alignment_unknown and similar. */
+ unsigned int align;
+
+ /* When alignment is known, the byte offset this pointer differs from the
+ above alignment. Access only through the same helper functions as align
+ above. */
+ unsigned int misalign;
+};
+
+/* Value range information for SSA_NAMEs representing non-pointer variables. */
+
+struct GTY (()) range_info_def {
+ /* Minimum for value range. */
+ double_int min;
+ /* Maximum for value range. */
+ double_int max;
+ /* Non-zero bits - bits not set are guaranteed to be always zero. */
+ double_int nonzero_bits;
+};
+
+
+#define SSANAMES(fun) (fun)->gimple_df->ssa_names
+#define MODIFIED_NORETURN_CALLS(fun) (fun)->gimple_df->modified_noreturn_calls
+#define DEFAULT_DEFS(fun) (fun)->gimple_df->default_defs
+
+#define num_ssa_names (vec_safe_length (cfun->gimple_df->ssa_names))
+#define ssa_name(i) ((*cfun->gimple_df->ssa_names)[(i)])
+
+
+/* Type of value ranges. See value_range_d In tree-vrp.c for a
+ description of these types. */
+enum value_range_type { VR_UNDEFINED, VR_RANGE, VR_ANTI_RANGE, VR_VARYING };
+
+/* Sets the value range to SSA. */
+extern void set_range_info (tree, enum value_range_type, double_int,
+ double_int);
+/* Gets the value range from SSA. */
+extern enum value_range_type get_range_info (const_tree, double_int *,
+ double_int *);
+extern void set_nonzero_bits (tree, double_int);
+extern double_int get_nonzero_bits (const_tree);
+extern void init_ssanames (struct function *, int);
+extern void fini_ssanames (void);
+extern void ssanames_print_statistics (void);
+extern tree make_ssa_name_fn (struct function *, tree, gimple);
+extern void release_ssa_name_fn (struct function *, tree);
+extern bool get_ptr_info_alignment (struct ptr_info_def *, unsigned int *,
+ unsigned int *);
+extern void mark_ptr_info_alignment_unknown (struct ptr_info_def *);
+extern void set_ptr_info_alignment (struct ptr_info_def *, unsigned int,
+ unsigned int);
+extern void adjust_ptr_info_misalignment (struct ptr_info_def *,
+ unsigned int);
+extern struct ptr_info_def *get_ptr_info (tree);
+
+extern tree copy_ssa_name_fn (struct function *, tree, gimple);
+extern void duplicate_ssa_name_ptr_info (tree, struct ptr_info_def *);
+extern tree duplicate_ssa_name_fn (struct function *, tree, gimple);
+extern void duplicate_ssa_name_range_info (tree, enum value_range_type,
+ struct range_info_def *);
+extern void release_defs (gimple);
+extern void replace_ssa_name_symbol (tree, tree);
+
+
+/* Return an SSA_NAME node for variable VAR defined in statement STMT
+ in function cfun. */
+
+static inline tree
+make_ssa_name (tree var, gimple stmt)
+{
+ return make_ssa_name_fn (cfun, var, stmt);
+}
+
+/* Return an SSA_NAME node using the template SSA name NAME defined in
+ statement STMT in function cfun. */
+
+static inline tree
+copy_ssa_name (tree var, gimple stmt)
+{
+ return copy_ssa_name_fn (cfun, var, stmt);
+}
+
+/* Creates a duplicate of a SSA name NAME tobe defined by statement STMT
+ in function cfun. */
+
+static inline tree
+duplicate_ssa_name (tree var, gimple stmt)
+{
+ return duplicate_ssa_name_fn (cfun, var, stmt);
+}
+
+/* Release the SSA name NAME used in function cfun. */
+
+static inline void
+release_ssa_name (tree name)
+{
+ release_ssa_name_fn (cfun, name);
+}
+
+/* Return an anonymous SSA_NAME node for type TYPE defined in statement STMT
+ in function cfun. Arrange so that it uses NAME in dumps. */
+
+static inline tree
+make_temp_ssa_name (tree type, gimple stmt, const char *name)
+{
+ tree ssa_name;
+ gcc_checking_assert (TYPE_P (type));
+ ssa_name = make_ssa_name_fn (cfun, type, stmt);
+ SET_SSA_NAME_VAR_OR_IDENTIFIER (ssa_name, get_identifier (name));
+ return ssa_name;
+}
+
+
+#endif /* GCC_TREE_SSANAMES_H */