/* Definitions for code generation pass of GNU compiler.
Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003, 2004, 2005
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
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 2, or (at your option) any later
+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
for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#ifndef GCC_EXPR_H
#define GCC_EXPR_H
#include "rtl.h"
/* For optimize_size */
#include "flags.h"
-/* For host_integerp, tree_low_cst, convert, size_binop, ssize_int, TREE_CODE,
- TYPE_SIZE, int_size_in_bytes, */
+/* For host_integerp, tree_low_cst, fold_convert, size_binop, ssize_int,
+ TREE_CODE, TYPE_SIZE, int_size_in_bytes, */
#include "tree.h"
/* For GET_MODE_BITSIZE, word_mode */
#include "machmode.h"
#define CLEAR_RATIO (optimize_size ? 3 : 15)
#endif
#endif
+
+/* If a memory set (to value other than zero) operation would take
+ SET_RATIO or more simple move-instruction sequences, we will do a movmem
+ or libcall instead. */
+#ifndef SET_RATIO
+#define SET_RATIO MOVE_RATIO
+#endif
\f
enum direction {none, upward, downward};
/* Add the value of the tree INC to the `struct args_size' TO. */
-#define ADD_PARM_SIZE(TO, INC) \
-do { \
- tree inc = (INC); \
- if (host_integerp (inc, 0)) \
- (TO).constant += tree_low_cst (inc, 0); \
- else if ((TO).var == 0) \
- (TO).var = convert (ssizetype, inc); \
- else \
- (TO).var = size_binop (PLUS_EXPR, (TO).var, \
- convert (ssizetype, inc)); \
+#define ADD_PARM_SIZE(TO, INC) \
+do { \
+ tree inc = (INC); \
+ if (host_integerp (inc, 0)) \
+ (TO).constant += tree_low_cst (inc, 0); \
+ else if ((TO).var == 0) \
+ (TO).var = fold_convert (ssizetype, inc); \
+ else \
+ (TO).var = size_binop (PLUS_EXPR, (TO).var, \
+ fold_convert (ssizetype, inc)); \
} while (0)
-#define SUB_PARM_SIZE(TO, DEC) \
-do { \
- tree dec = (DEC); \
- if (host_integerp (dec, 0)) \
- (TO).constant -= tree_low_cst (dec, 0); \
- else if ((TO).var == 0) \
- (TO).var = size_binop (MINUS_EXPR, ssize_int (0), \
- convert (ssizetype, dec)); \
- else \
- (TO).var = size_binop (MINUS_EXPR, (TO).var, \
- convert (ssizetype, dec)); \
+#define SUB_PARM_SIZE(TO, DEC) \
+do { \
+ tree dec = (DEC); \
+ if (host_integerp (dec, 0)) \
+ (TO).constant -= tree_low_cst (dec, 0); \
+ else if ((TO).var == 0) \
+ (TO).var = size_binop (MINUS_EXPR, ssize_int (0), \
+ fold_convert (ssizetype, dec)); \
+ else \
+ (TO).var = size_binop (MINUS_EXPR, (TO).var, \
+ fold_convert (ssizetype, dec)); \
} while (0)
/* Convert the implicit sum in a `struct args_size' into a tree
of type ssizetype. */
#define ARGS_SIZE_TREE(SIZE) \
((SIZE).var == 0 ? ssize_int ((SIZE).constant) \
- : size_binop (PLUS_EXPR, convert (ssizetype, (SIZE).var), \
+ : size_binop (PLUS_EXPR, fold_convert (ssizetype, (SIZE).var), \
ssize_int ((SIZE).constant)))
/* Convert the implicit sum in a `struct args_size' into an rtx. */
extern tree std_build_builtin_va_list (void);
extern void std_expand_builtin_va_start (tree, rtx);
extern rtx default_expand_builtin (tree, rtx, rtx, enum machine_mode, int);
-extern rtx default_expand_library_builtin (tree, rtx, rtx, enum machine_mode, int);
extern void expand_builtin_setjmp_setup (rtx, rtx);
extern void expand_builtin_setjmp_receiver (rtx);
extern rtx expand_builtin_saveregs (void);
extern void expand_builtin_trap (void);
+extern rtx builtin_strncpy_read_str (void *, HOST_WIDE_INT, enum machine_mode);
\f
/* Functions from expr.c: */
-/* This is run once per compilation to set up which modes can be used
- directly in memory and to initialize the block move optab. */
-extern void init_expr_once (void);
+/* This is run during target initialization to set up which modes can be
+ used directly in memory and to initialize the block move optab. */
+extern void init_expr_target (void);
/* This is run at the start of compiling a function. */
extern void init_expr (void);
extern void init_block_clear_fn (const char *);
extern rtx emit_block_move (rtx, rtx, rtx, enum block_op_methods);
+extern rtx emit_block_move_via_libcall (rtx, rtx, rtx, bool);
+extern rtx emit_block_move_hints (rtx, rtx, rtx, enum block_op_methods,
+ unsigned int, HOST_WIDE_INT);
/* Copy all or part of a value X into registers starting at REGNO.
The number of registers to be filled is NREGS. */
/* Write zeros through the storage of OBJECT.
If OBJECT has BLKmode, SIZE is its length in bytes. */
extern rtx clear_storage (rtx, rtx, enum block_op_methods);
+extern rtx clear_storage_hints (rtx, rtx, enum block_op_methods,
+ unsigned int, HOST_WIDE_INT);
+/* The same, but always output an library call. */
+rtx set_storage_via_libcall (rtx, rtx, rtx, bool);
/* Expand a setmem pattern; return true if successful. */
-extern bool set_storage_via_setmem (rtx, rtx, rtx, unsigned int);
+extern bool set_storage_via_setmem (rtx, rtx, rtx, unsigned int,
+ unsigned int, HOST_WIDE_INT);
/* Determine whether the LEN bytes can be moved by using several move
instructions. Return nonzero if a call to move_by_pieces should
CONSTFUN with several move instructions by store_by_pieces
function. CONSTFUNDATA is a pointer which will be passed as argument
in every CONSTFUN call.
- ALIGN is maximum alignment we can assume. */
+ ALIGN is maximum alignment we can assume.
+ MEMSETP is true if this is a real memset/bzero, not a copy
+ of a const string. */
extern int can_store_by_pieces (unsigned HOST_WIDE_INT,
rtx (*) (void *, HOST_WIDE_INT,
enum machine_mode),
- void *, unsigned int);
+ void *, unsigned int, bool);
/* Generate several move instructions to store LEN bytes generated by
CONSTFUN to block TO. (A MEM rtx with BLKmode). CONSTFUNDATA is a
pointer which will be passed as argument in every CONSTFUN call.
ALIGN is maximum alignment we can assume.
+ MEMSETP is true if this is a real memset/bzero, not a copy.
Returns TO + LEN. */
extern rtx store_by_pieces (rtx, unsigned HOST_WIDE_INT,
rtx (*) (void *, HOST_WIDE_INT, enum machine_mode),
- void *, unsigned int, int);
+ void *, unsigned int, bool, int);
/* Emit insns to set X from Y. */
extern rtx emit_move_insn (rtx, rtx);
/* Emit insns to set X from Y, with no frills. */
extern rtx emit_move_insn_1 (rtx, rtx);
+extern rtx emit_move_complex_push (enum machine_mode, rtx, rtx);
+extern rtx emit_move_complex_parts (rtx, rtx);
+
/* Push a block of length SIZE (perhaps variable)
and return an rtx to address the beginning of the block. */
extern rtx push_block (rtx, int, int);
int, rtx, int, rtx, rtx, int, rtx);
/* Expand an assignment that stores the value of FROM into TO. */
-extern void expand_assignment (tree, tree);
+extern void expand_assignment (tree, tree, bool);
/* Generate code for computing expression EXP,
and storing the value into TARGET.
If SUGGEST_REG is nonzero, copy the value through a register
and return that register, if that is possible. */
-extern rtx store_expr (tree, rtx, int);
+extern rtx store_expr (tree, rtx, int, bool);
/* Given an rtx that may include add and multiply operations,
generate them as insns and return a pseudo-reg containing the value.
/* Return an rtx that refers to the value returned by a function
in its original home. This becomes invalid if any more code is emitted. */
-extern rtx hard_function_value (tree, tree, tree, int);
+extern rtx hard_function_value (const_tree, const_tree, const_tree, int);
extern rtx prepare_call_address (rtx, rtx, rtx *, int, int);
if how is not obvious). */
extern rtx force_label_rtx (tree);
-/* Indicate how an input argument register was promoted. */
-extern rtx promoted_input_arg (unsigned int, enum machine_mode *, int *);
-
/* Return an rtx like arg but sans any constant terms.
Returns the original rtx if it has no constant terms.
The constant terms are added and stored via a second arg. */
valid address. */
extern rtx validize_mem (rtx);
+extern rtx use_anchored_address (rtx);
+
/* Given REF, a MEM, and T, either the type of X or the expression
corresponding to REF, set the memory attributes. OBJECTP is nonzero
if we are making a new object of this type. */
extern rtx force_not_mem (rtx);
/* Return mode and signedness to use when object is promoted. */
-extern enum machine_mode promote_mode (tree, enum machine_mode, int *, int);
+extern enum machine_mode promote_mode (const_tree, enum machine_mode, int *, int);
/* Remove some bytes from the stack. An rtx says how many. */
extern void adjust_stack (rtx);
extern enum machine_mode
mode_for_extraction (enum extraction_pattern, int);
-extern rtx store_bit_field (rtx, unsigned HOST_WIDE_INT,
- unsigned HOST_WIDE_INT, enum machine_mode, rtx);
+extern void store_bit_field (rtx, unsigned HOST_WIDE_INT,
+ unsigned HOST_WIDE_INT, enum machine_mode, rtx);
extern rtx extract_bit_field (rtx, unsigned HOST_WIDE_INT,
unsigned HOST_WIDE_INT, int, rtx,
enum machine_mode, enum machine_mode);
extern rtx expand_mult (enum machine_mode, rtx, rtx, rtx, int);
-extern rtx expand_mult_add (rtx, rtx, rtx, rtx,enum machine_mode, int);
extern rtx expand_mult_highpart_adjust (enum machine_mode, rtx, rtx, rtx, rtx, int);
extern rtx assemble_static_space (unsigned HOST_WIDE_INT);
-extern int safe_from_p (rtx, tree, int);
+extern int safe_from_p (const_rtx, tree, int);
/* Call this once to initialize the contents of the optabs
appropriately for the current target machine. */
/* Call this to initialize an optab function entry. */
extern rtx init_one_libfunc (const char *);
-extern void do_jump_by_parts_equality_rtx (rtx, rtx, rtx);
-extern void do_jump_by_parts_greater_rtx (enum machine_mode, int, rtx, rtx,
- rtx, rtx);
-
extern int vector_mode_valid_p (enum machine_mode);
#endif /* GCC_EXPR_H */
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