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Diffstat (limited to 'gnu/usr.bin/cc/include/expr.h')
-rw-r--r-- | gnu/usr.bin/cc/include/expr.h | 834 |
1 files changed, 834 insertions, 0 deletions
diff --git a/gnu/usr.bin/cc/include/expr.h b/gnu/usr.bin/cc/include/expr.h new file mode 100644 index 0000000..3bb9490 --- /dev/null +++ b/gnu/usr.bin/cc/include/expr.h @@ -0,0 +1,834 @@ +/* Definitions for code generation pass of GNU compiler. + Copyright (C) 1987, 1991, 1992, 1993, 1994 Free Software Foundation, Inc. + +This file is part of GNU CC. + +GNU CC 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. + +GNU CC 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 GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + + +#ifndef __STDC__ +#ifndef const +#define const +#endif +#endif + +/* The default branch cost is 1. */ +#ifndef BRANCH_COST +#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. */ +#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_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. */ +enum expand_modifier {EXPAND_NORMAL, EXPAND_SUM, + EXPAND_CONST_ADDRESS, EXPAND_INITIALIZER}; + +/* List of labels that must never be deleted. */ +extern rtx forced_labels; + +/* List (chain of EXPR_LISTs) of pseudo-regs of SAVE_EXPRs. + So we can mark them all live at the end of the function, if stupid. */ +extern rtx save_expr_regs; + +extern int current_function_calls_alloca; +extern int current_function_outgoing_args_size; + +/* This is the offset from the arg pointer to the place where the first + anonymous arg can be found, if there is one. */ +extern rtx current_function_arg_offset_rtx; + +/* This is nonzero if the current function uses the constant pool. */ +extern int current_function_uses_const_pool; + +/* This is nonzero if the current function uses pic_offset_table_rtx. */ +extern int current_function_uses_pic_offset_table; + +/* The arg pointer hard register, or the pseudo into which it was copied. */ +extern rtx current_function_internal_arg_pointer; + +/* Nonzero means stack pops must not be deferred, and deferred stack + pops must not be output. It is nonzero inside a function call, + inside a conditional expression, inside a statement expression, + and in other cases as well. */ +extern int inhibit_defer_pop; + +/* Number of function calls seen so far in current function. */ + +extern int function_call_count; + +/* RTX for stack slot that holds the current handler for nonlocal gotos. + Zero when function does not have nonlocal labels. */ + +extern rtx nonlocal_goto_handler_slot; + +/* RTX for stack slot that holds the stack pointer value to restore + for a nonlocal goto. + Zero when function does not have nonlocal labels. */ + +extern rtx nonlocal_goto_stack_level; + +/* List (chain of TREE_LIST) of LABEL_DECLs for all nonlocal labels + (labels to which there can be nonlocal gotos from nested functions) + in this function. */ + +#ifdef TREE_CODE /* Don't lose if tree.h not included. */ +extern tree nonlocal_labels; +#endif + +#define NO_DEFER_POP (inhibit_defer_pop += 1) +#define OK_DEFER_POP (inhibit_defer_pop -= 1) + +/* Number of units that we should eventually pop off the stack. + These are the arguments to function calls that have already returned. */ +extern int pending_stack_adjust; + +/* A list of all cleanups which belong to the arguments of + function calls being expanded by expand_call. */ +#ifdef TREE_CODE /* Don't lose if tree.h not included. */ +extern tree cleanups_this_call; +#endif + +/* When temporaries are created by TARGET_EXPRs, they are created at + this level of temp_slot_level, so that they can remain allocated + until no longer needed. CLEANUP_POINT_EXPRs define the lifetime + of TARGET_EXPRs. */ +extern int target_temp_slot_level; + +#ifdef TREE_CODE /* Don't lose if tree.h not included. */ +/* Structure to record the size of a sequence of arguments + as the sum of a tree-expression and a constant. */ + +struct args_size +{ + int constant; + tree var; +}; +#endif + +/* Add the value of the tree INC to the `struct args_size' TO. */ + +#define ADD_PARM_SIZE(TO, INC) \ +{ tree inc = (INC); \ + if (TREE_CODE (inc) == INTEGER_CST) \ + (TO).constant += TREE_INT_CST_LOW (inc); \ + else if ((TO).var == 0) \ + (TO).var = inc; \ + else \ + (TO).var = size_binop (PLUS_EXPR, (TO).var, inc); } + +#define SUB_PARM_SIZE(TO, DEC) \ +{ tree dec = (DEC); \ + if (TREE_CODE (dec) == INTEGER_CST) \ + (TO).constant -= TREE_INT_CST_LOW (dec); \ + else if ((TO).var == 0) \ + (TO).var = size_binop (MINUS_EXPR, integer_zero_node, dec); \ + else \ + (TO).var = size_binop (MINUS_EXPR, (TO).var, dec); } + +/* 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 (size_binop (PLUS_EXPR, (SIZE).var, \ + size_int ((SIZE).constant)), \ + NULL_RTX, VOIDmode, 0)) + +/* Convert the implicit sum in a `struct args_size' into a tree. */ +#define ARGS_SIZE_TREE(SIZE) \ +((SIZE).var == 0 ? size_int ((SIZE).constant) \ + : size_binop (PLUS_EXPR, (SIZE).var, size_int ((SIZE).constant))) + +/* Supply a default definition for FUNCTION_ARG_PADDING: + usually pad upward, but pad short args downward on + big-endian machines. */ + +enum direction {none, upward, downward}; /* Value has this type. */ + +#ifndef FUNCTION_ARG_PADDING +#if BYTES_BIG_ENDIAN +#define FUNCTION_ARG_PADDING(MODE, TYPE) \ + (((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) +#else +#define FUNCTION_ARG_PADDING(MODE, TYPE) upward +#endif +#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 + +/* Nonzero if we do not know how to pass TYPE solely in registers. + We cannot do so in the following cases: + + - if the type has variable size + - if the type is marked as addressable (it is required to be constructed + into the stack) + - if the padding and mode of the type is such that a copy into a register + would put it into the wrong part of the register. + + Which padding can't be supported depends on the byte endianness. + + A value in a register is implicitly padded at the most significant end. + On a big-endian machine, that is the lower end in memory. + So a value padded in memory at the upper end can't go in a register. + For a little-endian machine, the reverse is true. */ + +#if BYTES_BIG_ENDIAN +#define MUST_PASS_IN_STACK_BAD_PADDING upward +#else +#define MUST_PASS_IN_STACK_BAD_PADDING downward +#endif + +#define MUST_PASS_IN_STACK(MODE,TYPE) \ + ((TYPE) != 0 \ + && (TREE_CODE (TYPE_SIZE (TYPE)) != INTEGER_CST \ + || TREE_ADDRESSABLE (TYPE) \ + || ((MODE) == BLKmode \ + && ! ((TYPE) != 0 && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \ + && 0 == (int_size_in_bytes (TYPE) \ + % (PARM_BOUNDARY / BITS_PER_UNIT))) \ + && (FUNCTION_ARG_PADDING (MODE, TYPE) \ + == MUST_PASS_IN_STACK_BAD_PADDING)))) + +/* Nonzero if type TYPE should be returned in memory. + Most machines can use the following default definition. */ + +#ifndef RETURN_IN_MEMORY +#define RETURN_IN_MEMORY(TYPE) (TYPE_MODE (TYPE) == BLKmode) +#endif + +/* Optabs are tables saying how to generate insn bodies + for various machine modes and numbers of operands. + Each optab applies to one operation. + For example, add_optab applies to addition. + + The insn_code slot is the enum insn_code that says how to + generate an insn for this operation on a particular machine mode. + It is CODE_FOR_nothing if there is no such insn on the target machine. + + The `lib_call' slot is the name of the library function that + can be used to perform the operation. + + A few optabs, such as move_optab and cmp_optab, are used + by special code. */ + +/* Everything that uses expr.h needs to define enum insn_code + but we don't list it in the Makefile dependencies just for that. */ +#include "insn-codes.h" + +typedef struct optab +{ + enum rtx_code code; + struct { + enum insn_code insn_code; + rtx libfunc; + } handlers [NUM_MACHINE_MODES]; +} * optab; + +/* Given an enum insn_code, access the function to construct + the body of that kind of insn. */ +#ifdef FUNCTION_CONVERSION_BUG +/* Some compilers fail to convert a function properly to a + pointer-to-function when used as an argument. + So produce the pointer-to-function directly. + Luckily, these compilers seem to work properly when you + call the pointer-to-function. */ +#define GEN_FCN(CODE) (insn_gen_function[(int) (CODE)]) +#else +#define GEN_FCN(CODE) (*insn_gen_function[(int) (CODE)]) +#endif + +extern rtx (*const insn_gen_function[]) (); + +extern optab add_optab; +extern optab sub_optab; +extern optab smul_optab; /* Signed and floating-point multiply */ +extern optab smul_highpart_optab; /* Signed multiply, return high word */ +extern optab umul_highpart_optab; +extern optab smul_widen_optab; /* Signed multiply with result + one machine mode wider than args */ +extern optab umul_widen_optab; +extern optab sdiv_optab; /* Signed divide */ +extern optab sdivmod_optab; /* Signed divide-and-remainder in one */ +extern optab udiv_optab; +extern optab udivmod_optab; +extern optab smod_optab; /* Signed remainder */ +extern optab umod_optab; +extern optab flodiv_optab; /* Optab for floating divide. */ +extern optab ftrunc_optab; /* Convert float to integer in float fmt */ +extern optab and_optab; /* Logical and */ +extern optab ior_optab; /* Logical or */ +extern optab xor_optab; /* Logical xor */ +extern optab ashl_optab; /* Arithmetic shift left */ +extern optab ashr_optab; /* Arithmetic shift right */ +extern optab lshr_optab; /* Logical shift right */ +extern optab rotl_optab; /* Rotate left */ +extern optab rotr_optab; /* Rotate right */ +extern optab smin_optab; /* Signed and floating-point minimum value */ +extern optab smax_optab; /* Signed and floating-point maximum value */ +extern optab umin_optab; /* Unsigned minimum value */ +extern optab umax_optab; /* Unsigned maximum value */ + +extern optab mov_optab; /* Move instruction. */ +extern optab movstrict_optab; /* Move, preserving high part of register. */ + +extern optab cmp_optab; /* Compare insn; two operands. */ +extern optab tst_optab; /* tst insn; compare one operand against 0 */ + +/* Unary operations */ +extern optab neg_optab; /* Negation */ +extern optab abs_optab; /* Abs value */ +extern optab one_cmpl_optab; /* Bitwise not */ +extern optab ffs_optab; /* Find first bit set */ +extern optab sqrt_optab; /* Square root */ +extern optab sin_optab; /* Sine */ +extern optab cos_optab; /* Cosine */ +extern optab strlen_optab; /* String length */ + +/* Tables of patterns for extending one integer mode to another. */ +extern enum insn_code extendtab[MAX_MACHINE_MODE][MAX_MACHINE_MODE][2]; + +/* Tables of patterns for converting between fixed and floating point. */ +extern enum insn_code fixtab[NUM_MACHINE_MODES][NUM_MACHINE_MODES][2]; +extern enum insn_code fixtrunctab[NUM_MACHINE_MODES][NUM_MACHINE_MODES][2]; +extern enum insn_code floattab[NUM_MACHINE_MODES][NUM_MACHINE_MODES][2]; + +/* Contains the optab used for each rtx code. */ +extern optab code_to_optab[NUM_RTX_CODE + 1]; + +/* Passed to expand_binop and expand_unop 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 +}; + +/* SYMBOL_REF rtx's for the library functions that are called + implicitly and not via optabs. */ + +extern rtx extendsfdf2_libfunc; +extern rtx extendsfxf2_libfunc; +extern rtx extendsftf2_libfunc; +extern rtx extenddfxf2_libfunc; +extern rtx extenddftf2_libfunc; + +extern rtx truncdfsf2_libfunc; +extern rtx truncxfsf2_libfunc; +extern rtx trunctfsf2_libfunc; +extern rtx truncxfdf2_libfunc; +extern rtx trunctfdf2_libfunc; + +extern rtx memcpy_libfunc; +extern rtx bcopy_libfunc; +extern rtx memcmp_libfunc; +extern rtx bcmp_libfunc; +extern rtx memset_libfunc; +extern rtx bzero_libfunc; + +extern rtx eqsf2_libfunc; +extern rtx nesf2_libfunc; +extern rtx gtsf2_libfunc; +extern rtx gesf2_libfunc; +extern rtx ltsf2_libfunc; +extern rtx lesf2_libfunc; + +extern rtx eqdf2_libfunc; +extern rtx nedf2_libfunc; +extern rtx gtdf2_libfunc; +extern rtx gedf2_libfunc; +extern rtx ltdf2_libfunc; +extern rtx ledf2_libfunc; + +extern rtx eqxf2_libfunc; +extern rtx nexf2_libfunc; +extern rtx gtxf2_libfunc; +extern rtx gexf2_libfunc; +extern rtx ltxf2_libfunc; +extern rtx lexf2_libfunc; + +extern rtx eqtf2_libfunc; +extern rtx netf2_libfunc; +extern rtx gttf2_libfunc; +extern rtx getf2_libfunc; +extern rtx lttf2_libfunc; +extern rtx letf2_libfunc; + +extern rtx floatsisf_libfunc; +extern rtx floatdisf_libfunc; +extern rtx floattisf_libfunc; + +extern rtx floatsidf_libfunc; +extern rtx floatdidf_libfunc; +extern rtx floattidf_libfunc; + +extern rtx floatsixf_libfunc; +extern rtx floatdixf_libfunc; +extern rtx floattixf_libfunc; + +extern rtx floatsitf_libfunc; +extern rtx floatditf_libfunc; +extern rtx floattitf_libfunc; + +extern rtx fixsfsi_libfunc; +extern rtx fixsfdi_libfunc; +extern rtx fixsfti_libfunc; + +extern rtx fixdfsi_libfunc; +extern rtx fixdfdi_libfunc; +extern rtx fixdfti_libfunc; + +extern rtx fixxfsi_libfunc; +extern rtx fixxfdi_libfunc; +extern rtx fixxfti_libfunc; + +extern rtx fixtfsi_libfunc; +extern rtx fixtfdi_libfunc; +extern rtx fixtfti_libfunc; + +extern rtx fixunssfsi_libfunc; +extern rtx fixunssfdi_libfunc; +extern rtx fixunssfti_libfunc; + +extern rtx fixunsdfsi_libfunc; +extern rtx fixunsdfdi_libfunc; +extern rtx fixunsdfti_libfunc; + +extern rtx fixunsxfsi_libfunc; +extern rtx fixunsxfdi_libfunc; +extern rtx fixunsxfti_libfunc; + +extern rtx fixunstfsi_libfunc; +extern rtx fixunstfdi_libfunc; +extern rtx fixunstfti_libfunc; + +typedef rtx (*rtxfun) (); + +/* Indexed by the rtx-code for a conditional (eg. EQ, LT,...) + gives the gen_function to make a branch to test that condition. */ + +extern rtxfun bcc_gen_fctn[NUM_RTX_CODE]; + +/* Indexed by the rtx-code for a conditional (eg. EQ, LT,...) + gives the insn code to make a store-condition insn + to test that condition. */ + +extern enum insn_code setcc_gen_code[NUM_RTX_CODE]; + +/* This array records the insn_code of insns to perform block moves. */ +extern enum insn_code movstr_optab[NUM_MACHINE_MODES]; + +/* Define functions given in optabs.c. */ + +/* Expand a binary operation given optab and rtx operands. */ +extern rtx expand_binop PROTO((enum machine_mode, optab, rtx, rtx, rtx, + int, enum optab_methods)); + +/* Expand a binary operation with both signed and unsigned forms. */ +extern rtx sign_expand_binop PROTO((enum machine_mode, optab, optab, rtx, + rtx, rtx, int, enum optab_methods)); + +/* Generate code to perform an operation on two operands with two results. */ +extern int expand_twoval_binop PROTO((optab, rtx, rtx, rtx, rtx, int)); + +/* Expand a unary arithmetic operation given optab rtx operand. */ +extern rtx expand_unop PROTO((enum machine_mode, optab, rtx, rtx, int)); + +/* Expand the complex absolute value operation. */ +extern rtx expand_complex_abs PROTO((enum machine_mode, rtx, rtx, int)); + +/* Generate an instruction with a given INSN_CODE with an output and + an input. */ +extern void emit_unop_insn PROTO((int, rtx, rtx, enum rtx_code)); + +/* Emit code to perform a series of operations on a multi-word quantity, one + word at a time. */ +extern rtx emit_no_conflict_block PROTO((rtx, rtx, rtx, rtx, rtx)); + +/* Emit code to make a call to a constant function or a library call. */ +extern void emit_libcall_block PROTO((rtx, rtx, rtx, rtx)); + +/* Emit one rtl instruction to store zero in specified rtx. */ +extern void emit_clr_insn PROTO((rtx)); + +/* Emit one rtl insn to store 1 in specified rtx assuming it contains 0. */ +extern void emit_0_to_1_insn PROTO((rtx)); + +/* Emit one rtl insn to compare two rtx's. */ +extern void emit_cmp_insn PROTO((rtx, rtx, enum rtx_code, rtx, + enum machine_mode, int, int)); + +/* Nonzero if a compare of mode MODE can be done straightforwardly + (without splitting it into pieces). */ +extern int can_compare_p PROTO((enum machine_mode)); + +/* Emit a library call comparison between floating point X and Y. + COMPARISON is the rtl operator to compare with (EQ, NE, GT, etc.). */ +extern void emit_float_lib_cmp PROTO((rtx, rtx, enum rtx_code)); + +/* Generate code to indirectly jump to a location given in the rtx LOC. */ +extern void emit_indirect_jump PROTO((rtx)); + +/* Create but don't emit one rtl instruction to add one rtx into another. + 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. */ +extern rtx gen_add2_insn PROTO((rtx, rtx)); +extern rtx gen_sub2_insn PROTO((rtx, rtx)); +extern rtx gen_move_insn PROTO((rtx, rtx)); +extern int have_add2_insn PROTO((enum machine_mode)); +extern int have_sub2_insn PROTO((enum machine_mode)); + +/* Return the INSN_CODE to use for an extend operation. */ +extern enum insn_code can_extend_p PROTO((enum machine_mode, + enum machine_mode, int)); + +/* Generate the body of an insn to extend Y (with mode MFROM) + into X (with mode MTO). Do zero-extension if UNSIGNEDP is nonzero. */ +extern rtx gen_extend_insn PROTO((rtx, rtx, enum machine_mode, + enum machine_mode, int)); + +/* Initialize the tables that control conversion between fixed and + floating values. */ +extern void init_fixtab PROTO((void)); +extern void init_floattab PROTO((void)); + +/* Generate code for a FLOAT_EXPR. */ +extern void expand_float PROTO((rtx, rtx, int)); + +/* Generate code for a FIX_EXPR. */ +extern void expand_fix PROTO((rtx, rtx, int)); + +/* Call this once to initialize the contents of the optabs + appropriately for the current target machine. */ +extern void init_optabs PROTO((void)); + +/* Functions from expmed.c: */ + +/* Arguments MODE, RTX: return an rtx for the negation of that value. + May emit insns. */ +extern rtx negate_rtx PROTO((enum machine_mode, rtx)); + +/* Expand a logical AND operation. */ +extern rtx expand_and PROTO((rtx, rtx, rtx)); + +/* Emit a store-flag operation. */ +extern rtx emit_store_flag PROTO((rtx, enum rtx_code, rtx, rtx, + enum machine_mode, int, int)); + +/* Functions from loop.c: */ + +/* Given a JUMP_INSN, return a description of the test being made. */ +extern rtx get_condition PROTO((rtx, rtx *)); + +/* 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 PROTO((void)); + +/* This is run at the start of compiling a function. */ +extern void init_expr PROTO((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 PROTO((rtx, int)); + +/* Perform all the pending incrementations. */ +extern void emit_queue PROTO((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 PROTO((rtx, rtx, int)); + +/* Convert an rtx to specified machine mode and return the result. */ +extern rtx convert_to_mode PROTO((enum machine_mode, rtx, int)); + +/* Convert an rtx to MODE from OLDMODE and return the result. */ +extern rtx convert_modes PROTO((enum machine_mode, enum machine_mode, rtx, int)); + +/* Emit code to move a block Y to a block X. */ +extern void emit_block_move PROTO((rtx, rtx, rtx, int)); + +/* 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 PROTO((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 PROTO((int, rtx, int, int)); + +/* Mark REG as holding a parameter for the next CALL_INSN. */ +extern void use_reg PROTO((rtx*, rtx)); +/* Mark NREGS consecutive regs, starting at REGNO, as holding parameters + for the next CALL_INSN. */ +extern void use_regs PROTO((rtx*, int, int)); + +/* Write zeros through the storage of OBJECT. + If OBJECT has BLKmode, SIZE is its length in bytes. */ +extern void clear_storage PROTO((rtx, int)); + +/* Emit insns to set X from Y. */ +extern rtx emit_move_insn PROTO((rtx, rtx)); + +/* Emit insns to set X from Y, with no frills. */ +extern rtx emit_move_insn_1 PROTO ((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 PROTO((rtx, int, int)); + +/* Make an operand to push someting on the stack. */ +extern rtx gen_push_operand PROTO((void)); + +#ifdef TREE_CODE +/* Generate code to push something onto the stack, given its mode and type. */ +extern void emit_push_insn PROTO((rtx, enum machine_mode, tree, rtx, int, + int, rtx, int, rtx, rtx)); + +/* Emit library call. */ +extern void emit_library_call PVPROTO((rtx orgfun, int no_queue, + enum machine_mode outmode, int nargs, ...)); +extern rtx emit_library_call_value PVPROTO((rtx orgfun, rtx value, int no_queue, + enum machine_mode outmode, int nargs, ...)); + +/* Expand an assignment that stores the value of FROM into TO. */ +extern rtx expand_assignment PROTO((tree, tree, int, int)); + +/* 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 PROTO((tree, rtx, int)); +#endif + +/* 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 PROTO((rtx, rtx)); + +#ifdef TREE_CODE +/* 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. */ +extern rtx expand_expr PROTO((tree, rtx, enum machine_mode, + enum expand_modifier)); +#endif + +/* At the start of a function, record that we have no previously-pushed + arguments waiting to be popped. */ +extern void init_pending_stack_adjust PROTO((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 PROTO((void)); + +/* Pop any previously-pushed arguments that have not been popped yet. */ +extern void do_pending_stack_adjust PROTO((void)); + +#ifdef TREE_CODE +/* Expand all cleanups up to OLD_CLEANUPS. */ +extern void expand_cleanups_to PROTO((tree)); + +/* Generate code to evaluate EXP and jump to LABEL if the value is zero. */ +extern void jumpifnot PROTO((tree, rtx)); + +/* Generate code to evaluate EXP and jump to LABEL if the value is nonzero. */ +extern void jumpif PROTO((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 PROTO((tree, rtx, rtx)); +#endif + +/* Generate rtl to compare two rtx's, will call emit_cmp_insn. */ +extern rtx compare_from_rtx PROTO((rtx, rtx, enum rtx_code, int, + enum machine_mode, rtx, int)); + +/* Generate a tablejump instruction (used for switch statements). */ +extern void do_tablejump PROTO((rtx, enum machine_mode, rtx, rtx, rtx)); + +#ifdef TREE_CODE +/* 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 PROTO((tree)); + +extern rtx lookup_static_chain PROTO((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 PROTO((rtx, tree)); + +/* Return the address of the trampoline for entering nested fn FUNCTION. */ +extern rtx trampoline_address PROTO((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 PROTO((tree, tree)); + +extern rtx prepare_call_address PROTO((rtx, tree, rtx *, int)); + +extern rtx expand_call PROTO((tree, rtx, int)); + +extern rtx expand_shift PROTO((enum tree_code, enum machine_mode, rtx, tree, rtx, int)); +extern rtx expand_divmod PROTO((int, enum tree_code, enum machine_mode, rtx, rtx, rtx, int)); +extern void locate_and_pad_parm PROTO((enum machine_mode, tree, int, tree, struct args_size *, struct args_size *, struct args_size *)); +extern rtx expand_inline_function PROTO((tree, tree, rtx, int, tree, rtx)); +/* Return the CODE_LABEL rtx for a LABEL_DECL, creating it if necessary. */ +extern rtx label_rtx PROTO((tree)); +#endif + +/* Indicate how an input argument register was promoted. */ +extern rtx promoted_input_arg PROTO((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 PROTO((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 PROTO((enum machine_mode, rtx)); + +/* Like `memory_address' but pretent `flag_force_addr' is 0. */ +extern rtx memory_address_noforce PROTO((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 PROTO((rtx, enum machine_mode, rtx)); + +/* Return a memory reference like MEMREF, but which is known to have a + valid address. */ + +extern rtx validize_mem PROTO((rtx)); + +/* Assemble the static constant template for function entry trampolines. */ +extern rtx assemble_trampoline_template PROTO((void)); + +/* Return 1 if two rtx's are equivalent in structure and elements. */ +extern int rtx_equal_p PROTO((rtx, rtx)); + +/* 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 PROTO((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 PROTO((rtx)); + +/* Copy given rtx to a new temp reg and return that. */ +extern rtx copy_to_reg PROTO((rtx)); + +/* Like copy_to_reg but always make the reg Pmode. */ +extern rtx copy_addr_to_reg PROTO((rtx)); + +/* Like copy_to_reg but always make the reg the specified mode MODE. */ +extern rtx copy_to_mode_reg PROTO((enum machine_mode, rtx)); + +/* Copy given rtx to given temp reg and return that. */ +extern rtx copy_to_suggested_reg PROTO((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 PROTO((enum machine_mode, rtx)); + +/* Return given rtx, copied into a new temp reg if it was in memory. */ +extern rtx force_not_mem PROTO((rtx)); + +#ifdef TREE_CODE +/* Return mode and signedness to use when object is promoted. */ +extern enum machine_mode promote_mode PROTO((tree, enum machine_mode, + int *, int)); +#endif + +/* Remove some bytes from the stack. An rtx says how many. */ +extern void adjust_stack PROTO((rtx)); + +/* Add some bytes to the stack. An rtx says how many. */ +extern void anti_adjust_stack PROTO((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 PROTO((enum save_level, rtx *, rtx)); + +/* Restore the stack pointer from a save area of the specified level. */ +extern void emit_stack_restore PROTO((enum save_level, rtx, rtx)); + +/* Allocate some space on the stack dynamically and return its address. An rtx + says how many bytes. */ +extern rtx allocate_dynamic_stack_space PROTO((rtx, rtx, int)); + +/* Emit code to copy function value to a new temp reg and return that reg. */ +extern rtx function_value (); + +/* 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 PROTO((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 PROTO((rtx)); + +extern void emit_block_move PROTO((rtx, rtx, rtx, int)); + +extern rtx store_bit_field PROTO((rtx, int, int, enum machine_mode, rtx, int, int)); +extern rtx extract_bit_field PROTO((rtx, int, int, int, rtx, enum machine_mode, enum machine_mode, int, int)); +extern rtx expand_mult PROTO((enum machine_mode, rtx, rtx, rtx, int)); +extern rtx expand_mult_add PROTO((rtx, rtx, rtx, rtx,enum machine_mode, int)); + +extern rtx assemble_static_space PROTO((int)); + +/* Hook called by expand_expr for language-specific tree codes. + It is up to the language front end to install a hook + if it has any such codes that expand_expr needs to know about. */ +extern rtx (*lang_expand_expr) (); |