/* 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, 2008, 2009
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"
/* The default branch cost is 1. */
#ifndef BRANCH_COST
-#define BRANCH_COST 1
+#define BRANCH_COST(speed_p, predictable_p) 1
#endif
/* This is the 4th arg to `expand_expr'.
#ifndef MOVE_RATIO
#if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
-#define MOVE_RATIO 2
+#define MOVE_RATIO(speed) 2
#else
/* If we are optimizing for space (-Os), cut down the default move ratio. */
-#define MOVE_RATIO (optimize_size ? 3 : 15)
+#define MOVE_RATIO(speed) ((speed) ? 15 : 3)
#endif
#endif
#ifndef CLEAR_RATIO
#if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
-#define CLEAR_RATIO 2
+#define CLEAR_RATIO(speed) 2
#else
/* If we are optimizing for space, cut down the default clear ratio. */
-#define CLEAR_RATIO (optimize_size ? 3 : 15)
+#define CLEAR_RATIO(speed) ((speed) ? 15 :3)
#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(speed) MOVE_RATIO(speed)
+#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. */
/* Provide default values for the macros controlling stack checking. */
+/* The default is neither full builtin stack checking... */
#ifndef STACK_CHECK_BUILTIN
#define STACK_CHECK_BUILTIN 0
#endif
+/* ...nor static builtin stack checking. */
+#ifndef STACK_CHECK_STATIC_BUILTIN
+#define STACK_CHECK_STATIC_BUILTIN 0
+#endif
+
/* The default interval is one page. */
#ifndef STACK_CHECK_PROBE_INTERVAL
#define STACK_CHECK_PROBE_INTERVAL 4096
#define STACK_CHECK_PROBE_LOAD 0
#endif
-/* This value is arbitrary, but should be sufficient for most machines. */
+/* This is a kludge to try to capture the discrepancy between the old
+ mechanism (generic stack checking) and the new mechanism (static
+ builtin stack checking). STACK_CHECK_PROTECT needs to be bumped
+ for the latter because part of the protection area is effectively
+ included in STACK_CHECK_MAX_FRAME_SIZE for the former. */
+#ifdef STACK_CHECK_PROTECT
+#define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
+#else
+#define STACK_OLD_CHECK_PROTECT \
+ (USING_SJLJ_EXCEPTIONS ? 75 * UNITS_PER_WORD : 8 * 1024)
+#endif
+
+/* Minimum amount of stack required to recover from an anticipated stack
+ overflow detection. The default value conveys an estimate of the amount
+ of stack required to propagate an exception. */
#ifndef STACK_CHECK_PROTECT
-#define STACK_CHECK_PROTECT (75 * UNITS_PER_WORD)
+#define STACK_CHECK_PROTECT \
+ (USING_SJLJ_EXCEPTIONS ? 75 * UNITS_PER_WORD : 12 * 1024)
#endif
/* Make the maximum frame size be the largest we can and still only need
/* Functions from builtins.c: */
extern rtx expand_builtin (tree, rtx, rtx, enum machine_mode, int);
extern tree std_build_builtin_va_list (void);
+extern tree std_fn_abi_va_list (tree);
+extern tree std_canonical_va_list_type (tree);
+
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);
BLOCK_OP_TAILCALL
};
+extern GTY(()) tree block_clear_fn;
extern void init_block_move_fn (const char *);
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 expand_expr_real (exp, NULL_RTX, VOIDmode, EXPAND_NORMAL, NULL);
}
-extern void expand_var (tree);
-
/* At the start of a function, record that we have no previously-pushed
arguments waiting to be popped. */
extern void init_pending_stack_adjust (void);
enum machine_mode, rtx, rtx, rtx);
/* Two different ways of generating switch statements. */
-extern int try_casesi (tree, tree, tree, tree, rtx, rtx);
+extern int try_casesi (tree, tree, tree, tree, rtx, rtx, rtx);
extern int try_tablejump (tree, tree, tree, tree, rtx, rtx);
/* Smallest number of adjacent cases before we use a jump table.
/* 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. */
by emitting insns to perform arithmetic if nec. */
extern rtx memory_address (enum machine_mode, rtx);
-/* Like `memory_address' but pretend `flag_force_addr' is 0. */
-extern rtx memory_address_noforce (enum machine_mode, rtx);
-
/* Return a memory reference like MEMREF, but with its mode changed
to MODE and its address changed to ADDR.
(VOIDmode means don't change the mode.
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. */
expecting that it'll be added back in later. */
extern void set_mem_attributes_minus_bitpos (rtx, tree, int, HOST_WIDE_INT);
+/* Return OFFSET if XEXP (MEM, 0) - OFFSET is known to be ALIGN
+ bits aligned for 0 <= OFFSET < ALIGN / BITS_PER_UNIT, or
+ -1 if not known. */
+extern int get_mem_align_offset (rtx, unsigned int);
+
/* Assemble the static constant template for function entry trampolines. */
extern rtx assemble_trampoline_template (void);
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 extract_low_bits (enum machine_mode, enum machine_mode, rtx);
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 rtx set_user_assembler_libfunc (const char *, const char *);
extern int vector_mode_valid_p (enum machine_mode);
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