/* 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 Free Software Foundation, Inc.
+ 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, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, 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 BRANCH_COST 1
#endif
-/* Macros to access the slots of a QUEUED rtx.
- Here rather than in rtl.h because only the expansion pass
- should ever encounter a QUEUED. */
-
-/* The variable for which an increment is queued. */
-#define QUEUED_VAR(P) XEXP (P, 0)
-/* If the increment has been emitted, this is the insn
- that does the increment. It is zero before the increment is emitted.
- If more than one insn is emitted, this is the first insn. */
-#define QUEUED_INSN(P) XEXP (P, 1)
-/* If a pre-increment copy has been generated, this is the copy
- (it is a temporary reg). Zero if no copy made yet. */
-#define QUEUED_COPY(P) XEXP (P, 2)
-/* This is the body to use for the insn to do the increment.
- It is used to emit the increment. */
-#define QUEUED_BODY(P) XEXP (P, 3)
-/* Next QUEUED in the queue. */
-#define QUEUED_NEXT(P) XEXP (P, 4)
-
/* This is the 4th arg to `expand_expr'.
EXPAND_STACK_PARM means we are possibly expanding a call param onto
- the stack. Choosing a value of 2 isn't special; It just allows
- some code optimization in store_expr.
+ the stack.
EXPAND_SUM means it is ok to return a PLUS rtx or MULT rtx.
EXPAND_INITIALIZER is similar but also record any labels on forced_labels.
EXPAND_CONST_ADDRESS means it is ok to return a MEM whose address
EXPAND_WRITE means we are only going to write to the resulting rtx.
EXPAND_MEMORY means we are interested in a memory result, even if
the memory is constant and we could have propagated a constant value. */
-enum expand_modifier {EXPAND_NORMAL = 0, EXPAND_STACK_PARM = 2, EXPAND_SUM,
+enum expand_modifier {EXPAND_NORMAL = 0, EXPAND_STACK_PARM, EXPAND_SUM,
EXPAND_CONST_ADDRESS, EXPAND_INITIALIZER, EXPAND_WRITE,
EXPAND_MEMORY};
#endif
/* If a clear memory operation would take CLEAR_RATIO or more simple
- move-instruction sequences, we will do a clrmem or libcall instead. */
+ move-instruction sequences, we will do a setmem or libcall instead. */
#ifndef CLEAR_RATIO
-#if defined (HAVE_clrmemqi) || defined (HAVE_clrmemhi) || defined (HAVE_clrmemsi) || defined (HAVE_clrmemdi) || defined (HAVE_clrmemti)
+#if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
#define CLEAR_RATIO 2
#else
/* If we are optimizing for space, cut down the default clear ratio. */
#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};
struct args_size alignment_pad;
/* Which way we should pad this arg. */
enum direction where_pad;
+ /* slot_offset is at least this aligned. */
+ unsigned int boundary;
};
/* 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. */
#define ARGS_SIZE_RTX(SIZE) \
((SIZE).var == 0 ? GEN_INT ((SIZE).constant) \
- : expand_expr (ARGS_SIZE_TREE (SIZE), NULL_RTX, VOIDmode, 0))
+ : expand_normal (ARGS_SIZE_TREE (SIZE)))
/* Supply a default definition for FUNCTION_ARG_PADDING:
usually pad upward, but pad short args downward on
#define FUNCTION_ARG_BOUNDARY(MODE, TYPE) PARM_BOUNDARY
#endif
-#ifndef FUNCTION_ARG_PARTIAL_NREGS
-#define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) 0
-#endif
-
-#ifndef FUNCTION_ARG_PASS_BY_REFERENCE
-#define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) 0
-#endif
-
-#ifndef FUNCTION_ARG_CALLEE_COPIES
-#define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) 0
-#endif
-
-tree split_complex_types (tree);
-tree split_complex_values (tree);
-
/* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
Normally move_insn, so Pmode stack pointer. */
/* Create but don't emit one rtl instruction to perform certain operations.
Modes must match; operands must meet the operation's predicates.
- Likewise for subtraction and for just copying.
- These do not call protect_from_queue; caller must do so. */
+ Likewise for subtraction and for just copying. */
extern rtx gen_add2_insn (rtx, rtx);
extern rtx gen_add3_insn (rtx, rtx, rtx);
extern rtx gen_sub2_insn (rtx, rtx);
/* Generate code to indirectly jump to a location given in the rtx LOC. */
extern void emit_indirect_jump (rtx);
+/* Generate a conditional trap instruction. */
+extern rtx gen_cond_trap (enum rtx_code, rtx, rtx, rtx);
+
#include "insn-config.h"
#ifdef HAVE_conditional_move
rtx emit_conditional_add (rtx, enum rtx_code, rtx, rtx, enum machine_mode,
rtx, rtx, enum machine_mode, int);
+rtx expand_val_compare_and_swap (rtx, rtx, rtx, rtx);
+rtx expand_bool_compare_and_swap (rtx, rtx, rtx, rtx);
+rtx expand_sync_operation (rtx, rtx, enum rtx_code);
+rtx expand_sync_fetch_operation (rtx, rtx, enum rtx_code, bool, rtx);
+rtx expand_sync_lock_test_and_set (rtx, rtx, rtx);
\f
/* Functions from expmed.c: */
/* Like emit_store_flag, but always succeeds. */
extern rtx emit_store_flag_force (rtx, enum rtx_code, rtx, rtx,
enum machine_mode, int, int);
-
-/* Functions from loop.c: */
-
-/* Given an insn and condition, return a canonical description of
- the test being made. */
-extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int);
-
-/* Given a JUMP_INSN, return a canonical description of the test
- being made. */
-extern rtx get_condition (rtx, rtx *, int);
-
-/* Generate a conditional trap instruction. */
-extern rtx gen_cond_trap (enum rtx_code, rtx, rtx, rtx);
\f
/* Functions from builtins.c: */
extern rtx expand_builtin (tree, rtx, rtx, enum machine_mode, int);
extern tree std_build_builtin_va_list (void);
extern void std_expand_builtin_va_start (tree, rtx);
-extern rtx std_expand_builtin_va_arg (tree, tree);
-extern rtx expand_builtin_va_arg (tree, tree);
extern rtx default_expand_builtin (tree, rtx, rtx, enum machine_mode, int);
extern void expand_builtin_setjmp_setup (rtx, rtx);
extern void expand_builtin_setjmp_receiver (rtx);
-extern void expand_builtin_longjmp (rtx, 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);
-/* This is run at the end of compiling a function. */
-extern void finish_expr_for_function (void);
-
-/* Use protect_from_queue to convert a QUEUED expression
- into something that you can put immediately into an instruction. */
-extern rtx protect_from_queue (rtx, int);
-
-/* Perform all the pending incrementations. */
-extern void emit_queue (void);
-
-/* Tell if something has a queued subexpression. */
-extern int queued_subexp_p (rtx);
-
/* Emit some rtl insns to move data between rtx's, converting machine modes.
Both modes must be floating or both fixed. */
extern void convert_move (rtx, rtx, int);
{
BLOCK_OP_NORMAL,
BLOCK_OP_NO_LIBCALL,
- BLOCK_OP_CALL_PARM
+ BLOCK_OP_CALL_PARM,
+ /* Like BLOCK_OP_NORMAL, but the libcall can be tail call optimized. */
+ BLOCK_OP_TAILCALL
};
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. */
PARALLEL. */
extern void emit_group_load (rtx, rtx, tree, int);
+/* Similarly, but load into new temporaries. */
+extern rtx emit_group_load_into_temps (rtx, rtx, tree, int);
+
/* Move a non-consecutive group of registers represented by a PARALLEL into
a non-consecutive group of registers represented by a PARALLEL. */
extern void emit_group_move (rtx, rtx);
+/* Move a group of registers represented by a PARALLEL into pseudos. */
+extern rtx emit_group_move_into_temps (rtx);
+
/* Store a BLKmode value from non-consecutive registers represented by a
PARALLEL. */
extern void emit_group_store (rtx, rtx, tree, int);
/* Write zeros through the storage of OBJECT.
If OBJECT has BLKmode, SIZE is its length in bytes. */
-extern rtx clear_storage (rtx, rtx);
+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,
+ 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 rtx expand_assignment (tree, tree, int);
+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, target, mode, modifier, NULL);
}
+static inline rtx
+expand_normal (tree exp)
+{
+ 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);
+/* Discard any pending stack adjustment. */
+extern void discard_pending_stack_adjust (void);
+
/* When exiting from function, if safe, clear out any pending stack adjust
so the adjustment won't get done. */
extern void clear_pending_stack_adjust (void);
/* Functions from alias.c */
#include "alias.h"
-/* extern HOST_WIDE_INT get_varargs_alias_set (void); */
-/* extern HOST_WIDE_INT get_frame_alias_set (void); */
-/* extern void record_base_value (unsigned int, rtx, int); */
-/* extern void record_alias_subset (HOST_WIDE_INT, HOST_WIDE_INT); */
-/* extern HOST_WIDE_INT new_alias_set (void); */
-/* extern int can_address_p (tree); */
\f
/* rtl.h and tree.h were included. */
if the size can vary or is larger than an integer. */
extern HOST_WIDE_INT int_expr_size (tree);
-/* Convert a stack slot address ADDR valid in function FNDECL
- into an address valid in this function (using a static chain). */
-extern rtx fix_lexical_addr (rtx, tree);
-
-/* Return the address of the trampoline for entering nested fn FUNCTION. */
-extern rtx trampoline_address (tree);
-
/* 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, int);
+extern rtx hard_function_value (const_tree, const_tree, const_tree, int);
extern rtx prepare_call_address (rtx, rtx, rtx *, int, int);
+extern bool shift_return_value (enum machine_mode, bool, rtx);
+
extern rtx expand_call (tree, rtx, int);
extern void fixup_tail_calls (void);
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 pretent `flag_force_addr' is 0. */
+/* 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
valid address. */
extern rtx validize_mem (rtx);
-/* Given REF, either a MEM or a REG, and T, either the type of X or
- the expression corresponding to REF, set RTX_UNCHANGING_P if
- appropriate. */
-extern void maybe_set_unchanging (rtx, tree);
+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
/* Assemble the static constant template for function entry trampolines. */
extern rtx assemble_trampoline_template (void);
-/* Given rtx, return new rtx whose address won't be affected by
- any side effects. It has been copied to a new temporary reg. */
-extern rtx stabilize (rtx);
-
-/* Given an rtx, copy all regs it refers to into new temps
- and return a modified copy that refers to the new temps. */
-extern rtx copy_all_regs (rtx);
-
/* Copy given rtx to a new temp reg and return that. */
extern rtx copy_to_reg (rtx);
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);
in its original home. This becomes invalid if any more code is emitted. */
extern rtx hard_libcall_value (enum machine_mode);
-/* Given an rtx, return an rtx for a value rounded up to a multiple
- of STACK_BOUNDARY / BITS_PER_UNIT. */
-extern rtx round_push (rtx);
-
/* Return the mode desired by operand N of a particular bitfield
insert/extract insn, or MAX_MACHINE_MODE if no such insn is
available. */
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 bool const_mult_add_overflow_p (rtx, rtx, rtx, enum machine_mode, 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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