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Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/expr.h')
| -rw-r--r-- | gcc-4.2.1-5666.3/gcc/expr.h | 756 |
1 files changed, 756 insertions, 0 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/expr.h b/gcc-4.2.1-5666.3/gcc/expr.h new file mode 100644 index 000000000..54a50073f --- /dev/null +++ b/gcc-4.2.1-5666.3/gcc/expr.h @@ -0,0 +1,756 @@ +/* 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, 2006 + 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 +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 COPYING. If not, write to the Free +Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301, USA. */ + +#ifndef GCC_EXPR_H +#define GCC_EXPR_H + +/* For inhibit_defer_pop */ +#include "function.h" +/* For XEXP, GEN_INT, rtx_code */ +#include "rtl.h" +/* For optimize_size */ +#include "flags.h" +/* 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 +#endif + +/* This is the 4th arg to `expand_expr'. + EXPAND_STACK_PARM means we are possibly expanding a call param onto + 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 + is a constant that is not a legitimate 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, EXPAND_SUM, + EXPAND_CONST_ADDRESS, EXPAND_INITIALIZER, EXPAND_WRITE, + EXPAND_MEMORY}; + +/* Prevent the compiler from deferring stack pops. See + inhibit_defer_pop for more information. */ +#define NO_DEFER_POP (inhibit_defer_pop += 1) + +/* Allow the compiler to defer stack pops. See inhibit_defer_pop for + more information. */ +#define OK_DEFER_POP (inhibit_defer_pop -= 1) + +/* If a memory-to-memory move would take MOVE_RATIO or more simple + move-instruction sequences, we will do a movmem or libcall instead. */ + +#ifndef MOVE_RATIO +#if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti) +#define MOVE_RATIO 2 +#else +/* If we are optimizing for space (-Os), cut down the default move ratio. */ +#define MOVE_RATIO (optimize_size ? 3 : 15) +#endif +#endif + +/* If a clear memory operation would take CLEAR_RATIO or more simple + move-instruction sequences, we will do a setmem or libcall instead. */ + +#ifndef CLEAR_RATIO +#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 + +enum direction {none, upward, downward}; + +/* Structure to record the size of a sequence of arguments + as the sum of a tree-expression and a constant. This structure is + also used to store offsets from the stack, which might be negative, + so the variable part must be ssizetype, not sizetype. */ + +struct args_size +{ + HOST_WIDE_INT constant; + tree var; +}; + +/* Package up various arg related fields of struct args for + locate_and_pad_parm. */ +struct locate_and_pad_arg_data +{ + /* Size of this argument on the stack, rounded up for any padding it + gets. If REG_PARM_STACK_SPACE is defined, then register parms are + counted here, otherwise they aren't. */ + struct args_size size; + /* Offset of this argument from beginning of stack-args. */ + struct args_size offset; + /* Offset to the start of the stack slot. Different from OFFSET + if this arg pads downward. */ + struct args_size slot_offset; + /* The amount that the stack pointer needs to be adjusted to + force alignment for the next argument. */ + 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 = 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), \ + 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, 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_normal (ARGS_SIZE_TREE (SIZE))) + +/* Supply a default definition for FUNCTION_ARG_PADDING: + usually pad upward, but pad short args downward on + big-endian machines. */ + +#define DEFAULT_FUNCTION_ARG_PADDING(MODE, TYPE) \ + (! BYTES_BIG_ENDIAN \ + ? upward \ + : (((MODE) == BLKmode \ + ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \ + && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \ + : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY) \ + ? downward : upward)) + +#ifndef FUNCTION_ARG_PADDING +#define FUNCTION_ARG_PADDING(MODE, TYPE) \ + DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE)) +#endif + +/* Supply a default definition for FUNCTION_ARG_BOUNDARY. Normally, we let + FUNCTION_ARG_PADDING, which also pads the length, handle any needed + alignment. */ + +#ifndef FUNCTION_ARG_BOUNDARY +#define FUNCTION_ARG_BOUNDARY(MODE, TYPE) PARM_BOUNDARY +#endif + +/* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save. + Normally move_insn, so Pmode stack pointer. */ + +#ifndef STACK_SAVEAREA_MODE +#define STACK_SAVEAREA_MODE(LEVEL) Pmode +#endif + +/* Supply a default definition of STACK_SIZE_MODE for + allocate_dynamic_stack_space. Normally PLUS/MINUS, so word_mode. */ + +#ifndef STACK_SIZE_MODE +#define STACK_SIZE_MODE word_mode +#endif + +/* Provide default values for the macros controlling stack checking. */ + +#ifndef STACK_CHECK_BUILTIN +#define STACK_CHECK_BUILTIN 0 +#endif + +/* The default interval is one page. */ +#ifndef STACK_CHECK_PROBE_INTERVAL +#define STACK_CHECK_PROBE_INTERVAL 4096 +#endif + +/* The default is to do a store into the stack. */ +#ifndef STACK_CHECK_PROBE_LOAD +#define STACK_CHECK_PROBE_LOAD 0 +#endif + +/* This value is arbitrary, but should be sufficient for most machines. */ +#ifndef STACK_CHECK_PROTECT +#define STACK_CHECK_PROTECT (75 * UNITS_PER_WORD) +#endif + +/* Make the maximum frame size be the largest we can and still only need + one probe per function. */ +#ifndef STACK_CHECK_MAX_FRAME_SIZE +#define STACK_CHECK_MAX_FRAME_SIZE \ + (STACK_CHECK_PROBE_INTERVAL - UNITS_PER_WORD) +#endif + +/* This is arbitrary, but should be large enough everywhere. */ +#ifndef STACK_CHECK_FIXED_FRAME_SIZE +#define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD) +#endif + +/* Provide a reasonable default for the maximum size of an object to + allocate in the fixed frame. We may need to be able to make this + controllable by the user at some point. */ +#ifndef STACK_CHECK_MAX_VAR_SIZE +#define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100) +#endif + +/* Functions from optabs.c, commonly used, and without need for the optabs + tables: */ + +/* Passed to expand_simple_binop and expand_binop to say which options + to try to use if the requested operation can't be open-coded on the + requisite mode. Either OPTAB_LIB or OPTAB_LIB_WIDEN says try using + a library call. Either OPTAB_WIDEN or OPTAB_LIB_WIDEN says try + using a wider mode. OPTAB_MUST_WIDEN says try widening and don't + try anything else. */ + +enum optab_methods +{ + OPTAB_DIRECT, + OPTAB_LIB, + OPTAB_WIDEN, + OPTAB_LIB_WIDEN, + OPTAB_MUST_WIDEN +}; + +/* Generate code for a simple binary or unary operation. "Simple" in + this case means "can be unambiguously described by a (mode, code) + pair and mapped to a single optab." */ +extern rtx expand_simple_binop (enum machine_mode, enum rtx_code, rtx, + rtx, rtx, int, enum optab_methods); +extern rtx expand_simple_unop (enum machine_mode, enum rtx_code, rtx, rtx, + int); + +/* Report whether the machine description contains an insn which can + perform the operation described by CODE and MODE. */ +extern int have_insn_for (enum rtx_code, enum machine_mode); + +/* Emit code to make a call to a constant function or a library call. */ +extern void emit_libcall_block (rtx, rtx, rtx, rtx); + +/* 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. */ +extern rtx gen_add2_insn (rtx, rtx); +extern rtx gen_add3_insn (rtx, rtx, rtx); +extern rtx gen_sub2_insn (rtx, rtx); +extern rtx gen_sub3_insn (rtx, rtx, rtx); +extern rtx gen_move_insn (rtx, rtx); +extern int have_add2_insn (rtx, rtx); +extern int have_sub2_insn (rtx, rtx); + +/* Emit a pair of rtl insns to compare two rtx's and to jump + to a label if the comparison is true. */ +extern void emit_cmp_and_jump_insns (rtx, rtx, enum rtx_code, rtx, + enum machine_mode, int, 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 +/* Emit a conditional move operation. */ +rtx emit_conditional_move (rtx, enum rtx_code, rtx, rtx, enum machine_mode, + rtx, rtx, enum machine_mode, int); + +/* Return nonzero if the conditional move is supported. */ +int can_conditionally_move_p (enum machine_mode mode); + +#endif +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); + +/* Functions from expmed.c: */ + +/* Arguments MODE, RTX: return an rtx for the negation of that value. + May emit insns. */ +extern rtx negate_rtx (enum machine_mode, rtx); + +/* Expand a logical AND operation. */ +extern rtx expand_and (enum machine_mode, rtx, rtx, rtx); + +/* Emit a store-flag operation. */ +extern rtx emit_store_flag (rtx, enum rtx_code, rtx, rtx, enum machine_mode, + int, int); + +/* 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 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 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 rtx expand_builtin_saveregs (void); +extern void expand_builtin_trap (void); + +/* 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 at the start of compiling a function. */ +extern void init_expr (void); + +/* 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); + +/* Convert an rtx to specified machine mode and return the result. */ +extern rtx convert_to_mode (enum machine_mode, rtx, int); + +/* Convert an rtx to MODE from OLDMODE and return the result. */ +extern rtx convert_modes (enum machine_mode, enum machine_mode, rtx, int); + +/* Emit code to move a block Y to a block X. */ + +enum block_op_methods +{ + BLOCK_OP_NORMAL, + BLOCK_OP_NO_LIBCALL, + 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); + +/* Copy all or part of a value X into registers starting at REGNO. + The number of registers to be filled is NREGS. */ +extern void move_block_to_reg (int, rtx, int, enum machine_mode); + +/* Copy all or part of a BLKmode value X out of registers starting at REGNO. + The number of registers to be filled is NREGS. */ +extern void move_block_from_reg (int, rtx, int); + +/* Generate a non-consecutive group of registers represented by a PARALLEL. */ +extern rtx gen_group_rtx (rtx); + +/* Load a BLKmode value into non-consecutive registers represented by a + 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); + +/* Copy BLKmode object from a set of registers. */ +extern rtx copy_blkmode_from_reg (rtx, rtx, tree); + +/* Mark REG as holding a parameter for the next CALL_INSN. */ +extern void use_reg (rtx *, rtx); + +/* Mark NREGS consecutive regs, starting at REGNO, as holding parameters + for the next CALL_INSN. */ +extern void use_regs (rtx *, int, int); + +/* Mark a PARALLEL as holding a parameter for the next CALL_INSN. */ +extern void use_group_regs (rtx *, rtx); + +/* 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); + +/* Expand a setmem pattern; return true if successful. */ +extern bool set_storage_via_setmem (rtx, rtx, rtx, unsigned int); + +/* Determine whether the LEN bytes can be moved by using several move + instructions. Return nonzero if a call to move_by_pieces should + succeed. */ +extern int can_move_by_pieces (unsigned HOST_WIDE_INT, unsigned int); + +/* Return nonzero if it is desirable to store LEN bytes generated by + 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. */ +extern int can_store_by_pieces (unsigned HOST_WIDE_INT, + rtx (*) (void *, HOST_WIDE_INT, + enum machine_mode), + void *, unsigned int); + +/* 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. + 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); + +/* 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); + +/* 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); + +/* Generate code to push something onto the stack, given its mode and type. */ +extern void emit_push_insn (rtx, enum machine_mode, tree, rtx, unsigned 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); + +/* 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); + +/* Given an rtx that may include add and multiply operations, + generate them as insns and return a pseudo-reg containing the value. + Useful after calling expand_expr with 1 as sum_ok. */ +extern rtx force_operand (rtx, rtx); + +/* Work horse for expand_expr. */ +extern rtx expand_expr_real (tree, rtx, enum machine_mode, + enum expand_modifier, rtx *); + +/* Generate code for computing expression EXP. + An rtx for the computed value is returned. The value is never null. + In the case of a void EXP, const0_rtx is returned. */ +static inline rtx +expand_expr (tree exp, rtx target, enum machine_mode mode, + enum expand_modifier modifier) +{ + 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); + +/* Pop any previously-pushed arguments that have not been popped yet. */ +extern void do_pending_stack_adjust (void); + +/* Return the tree node and offset if a given argument corresponds to + a string constant. */ +extern tree string_constant (tree, tree *); + +/* Generate code to evaluate EXP and jump to LABEL if the value is zero. */ +extern void jumpifnot (tree, rtx); + +/* Generate code to evaluate EXP and jump to LABEL if the value is nonzero. */ +extern void jumpif (tree, rtx); + +/* Generate code to evaluate EXP and jump to IF_FALSE_LABEL if + the result is zero, or IF_TRUE_LABEL if the result is one. */ +extern void do_jump (tree, rtx, rtx); + +/* Generate rtl to compare two rtx's, will call emit_cmp_insn. */ +extern rtx compare_from_rtx (rtx, rtx, enum rtx_code, int, enum machine_mode, + rtx); +extern void do_compare_rtx_and_jump (rtx, rtx, enum rtx_code, int, + 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_tablejump (tree, tree, tree, tree, rtx, rtx); + +/* Smallest number of adjacent cases before we use a jump table. + XXX Should be a target hook. */ +extern unsigned int case_values_threshold (void); + +/* Functions from alias.c */ +#include "alias.h" + + +/* rtl.h and tree.h were included. */ +/* Return an rtx for the size in bytes of the value of an expr. */ +extern rtx expr_size (tree); + +/* Return a wide integer for the size in bytes of the value of EXP, or -1 + if the size can vary or is larger than an integer. */ +extern HOST_WIDE_INT int_expr_size (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, 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); + +#ifdef TREE_CODE +extern rtx expand_shift (enum tree_code, enum machine_mode, rtx, tree, rtx, + int); +extern rtx expand_divmod (int, enum tree_code, enum machine_mode, rtx, rtx, + rtx, int); +#endif + +extern void locate_and_pad_parm (enum machine_mode, tree, int, int, tree, + struct args_size *, + struct locate_and_pad_arg_data *); + +/* Return the CODE_LABEL rtx for a LABEL_DECL, creating it if necessary. */ +extern rtx label_rtx (tree); + +/* As label_rtx, but additionally the label is placed on the forced label + list of its containing function (i.e. it is treated as reachable even + 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. */ +extern rtx eliminate_constant_term (rtx, rtx *); + +/* Convert arg to a valid memory address for specified machine mode, + 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. + NULL for ADDR means don't change the address.) */ +extern rtx change_address (rtx, enum machine_mode, rtx); + +/* Return a memory reference like MEMREF, but with its mode changed + to MODE and its address offset by OFFSET bytes. */ +#define adjust_address(MEMREF, MODE, OFFSET) \ + adjust_address_1 (MEMREF, MODE, OFFSET, 1, 1) + +/* Likewise, but the reference is not required to be valid. */ +#define adjust_address_nv(MEMREF, MODE, OFFSET) \ + adjust_address_1 (MEMREF, MODE, OFFSET, 0, 1) + +/* Return a memory reference like MEMREF, but with its mode changed + to MODE and its address changed to ADDR, which is assumed to be + increased by OFFSET bytes from MEMREF. */ +#define adjust_automodify_address(MEMREF, MODE, ADDR, OFFSET) \ + adjust_automodify_address_1 (MEMREF, MODE, ADDR, OFFSET, 1) + +/* Likewise, but the reference is not required to be valid. */ +#define adjust_automodify_address_nv(MEMREF, MODE, ADDR, OFFSET) \ + adjust_automodify_address_1 (MEMREF, MODE, ADDR, OFFSET, 0) + +extern rtx adjust_address_1 (rtx, enum machine_mode, HOST_WIDE_INT, int, int); +extern rtx adjust_automodify_address_1 (rtx, enum machine_mode, rtx, + HOST_WIDE_INT, int); + +/* Return a memory reference like MEMREF, but whose address is changed by + adding OFFSET, an RTX, to it. POW2 is the highest power of two factor + known to be in OFFSET (possibly 1). */ +extern rtx offset_address (rtx, rtx, unsigned HOST_WIDE_INT); + +/* Definitions from emit-rtl.c */ +#include "emit-rtl.h" + +/* Return a memory reference like MEMREF, but with its mode widened to + MODE and adjusted by OFFSET. */ +extern rtx widen_memory_access (rtx, enum machine_mode, HOST_WIDE_INT); + +/* Return a memory reference like MEMREF, but which is known to have a + 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 void set_mem_attributes (rtx, tree, int); + +/* Similar, except that BITPOS has not yet been applied to REF, so if + we alter MEM_OFFSET according to T then we should subtract BITPOS + expecting that it'll be added back in later. */ +extern void set_mem_attributes_minus_bitpos (rtx, tree, int, HOST_WIDE_INT); + +/* Assemble the static constant template for function entry trampolines. */ +extern rtx assemble_trampoline_template (void); + +/* Copy given rtx to a new temp reg and return that. */ +extern rtx copy_to_reg (rtx); + +/* Like copy_to_reg but always make the reg Pmode. */ +extern rtx copy_addr_to_reg (rtx); + +/* Like copy_to_reg but always make the reg the specified mode MODE. */ +extern rtx copy_to_mode_reg (enum machine_mode, rtx); + +/* Copy given rtx to given temp reg and return that. */ +extern rtx copy_to_suggested_reg (rtx, rtx, enum machine_mode); + +/* Copy a value to a register if it isn't already a register. + Args are mode (in case value is a constant) and the value. */ +extern rtx force_reg (enum machine_mode, rtx); + +/* Return given rtx, copied into a new temp reg if it was in memory. */ +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); + +/* Remove some bytes from the stack. An rtx says how many. */ +extern void adjust_stack (rtx); + +/* Add some bytes to the stack. An rtx says how many. */ +extern void anti_adjust_stack (rtx); + +/* This enum is used for the following two functions. */ +enum save_level {SAVE_BLOCK, SAVE_FUNCTION, SAVE_NONLOCAL}; + +/* Save the stack pointer at the specified level. */ +extern void emit_stack_save (enum save_level, rtx *, rtx); + +/* Restore the stack pointer from a save area of the specified level. */ +extern void emit_stack_restore (enum save_level, rtx, rtx); + +/* Invoke emit_stack_save for the nonlocal_goto_save_area. */ +extern void update_nonlocal_goto_save_area (void); + +/* Allocate some space on the stack dynamically and return its address. An rtx + says how many bytes. */ +extern rtx allocate_dynamic_stack_space (rtx, rtx, int); + +/* Probe a range of stack addresses from FIRST to FIRST+SIZE, inclusive. + FIRST is a constant and size is a Pmode RTX. These are offsets from the + current stack pointer. STACK_GROWS_DOWNWARD says whether to add or + subtract from the stack. If SIZE is constant, this is done + with a fixed number of probes. Otherwise, we must make a loop. */ +extern void probe_stack_range (HOST_WIDE_INT, rtx); + +/* Return an rtx that refers to the value returned by a library call + in its original home. This becomes invalid if any more code is emitted. */ +extern rtx hard_libcall_value (enum machine_mode); + +/* Return the mode desired by operand N of a particular bitfield + insert/extract insn, or MAX_MACHINE_MODE if no such insn is + available. */ + +enum extraction_pattern { EP_insv, EP_extv, EP_extzv }; +extern enum machine_mode +mode_for_extraction (enum extraction_pattern, int); + +extern rtx store_bit_field (rtx, unsigned HOST_WIDE_INT, + /* APPLE LOCAL begin 6020402 */ + unsigned HOST_WIDE_INT, enum machine_mode, rtx, + tree); + /* APPLE LOCAL end 6020402 */ +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_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); + +/* Call this once to initialize the contents of the optabs + appropriately for the current target machine. */ +extern void init_optabs (void); +extern void init_all_optabs (void); + +/* Call this to initialize an optab function entry. */ +extern rtx init_one_libfunc (const char *); + +extern int vector_mode_valid_p (enum machine_mode); + +/* APPLE LOCAL begin radar 4441049 */ +extern tree objc_v2_component_ref_field_offset (tree exp); +extern tree objc_v2_bitfield_ivar_bitpos (tree exp); +/* APPLE LOCAL end radar 4441049 */ + +#endif /* GCC_EXPR_H */ |